SENTRON
Monitoring Devices
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10/2015
© Siemens AG 2016
© Siemens AG 2016
Siemens · 10/2015
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2Introduction
Monitoring devices for
electrical values
55SV8 residual current monitors
11 5TT3 voltage relays
19 5TT3 voltage and frequency relays
22 5TT6 current relays
27 5TT3 reverse power relays
28 5TT3 fuse monitors
29 5TT3 phase and phase sequence
monitors
31 5TT3 insulation monitors for industrial
applications
34 7LQ3 monitors for medical premises
Monitoring devices for plants and
equipment
53 5TT3 fault signaling units
55 5TT5 EMERGENCY STOP modules
57 5TT3 level relays
59 5TT3 line circuit relays
60 5TT3 p.f. monitors
62 5TT3 motor protection relays
Monitoring Devices
© Siemens AG 2016
2Siemens · 10/2015
Introduction
Monitoring Devices
■
Overview
Devices Page Application Standards Used in
Non-residential
buildings
Residential
buildings
Industry
Monitoring devices for electrical values
5SV8 residual current monitors 5To increase system availability and
operating safety through continuous
monitoring of residual current in
electrical systems and signaling if a
defined threshold is exceeded.
IEC 62020; EN 62020 ✓-- ✓
Modular residual current devices
(MRCD)
5The MRCD is a modular residual current
device type for personnel and fire
protection.
DIN EN 60947-2
(Appendix M),
IEC 60947-2
(Appendix M)
✓-- ✓
5TT3 voltage relays 11 Monitoring the voltage of emergency
lighting in public buildings, short-time
failures of 20 ms, for ensuring
operational parameters for devices or
system components or monitoring the
neutral conductor for breaks.
IEC 60255;
DIN VDE 0435-303;
DIN VDE 0108;
DIN VDE 0435;
DIN VDE 0633
✓-- ✓
5TT3 voltage and frequency relays 19 The voltage and frequency relay
monitors the status of the grid in the
case of in-plant generation systems.
Violation of an upper or lower limit
results in shutdown and disconnection
of the generation system from the grid.
This ensures a stable incoming supply
system.
IEC/EN 60255-1;
IEC/EN 61000;
VDE-AR-N-4105
✓ ✓ ✓
5TT6 current relays 22 Monitoring of emergency and signal
lighting and motors.
All current relays can be short-time
overloaded and connected either with
direct measurement or through
transformers.
IEC 60255;
DIN VDE 0435-303
✓-- ✓
5TT3 reverse power relays 27 Reverse power relays are used in power
supply systems, e.g. photovoltaic, wind
power, water power and unit-type
cogenerating stations, to control the
reverse power. They prevent voltage
being returned from the grid and
causing damage if the infeed system
itself fails or is damaged.
IEC 50255;
DIN VDE 0435-303
✓ ✓ ✓
© Siemens AG 2016
3
Siemens · 10/2015
Monitoring Devices
Introduction
5TT3 fuse monitors 28 Monitoring of all types of low-voltage
fuses.
Can be used in asymmetric systems
afflicted with harmonics and
regenerative feedback motors.
IEC 60255;
DIN VDE 0435
✓-- ✓
5TT3 phase and phase sequence
monitors
29 For the visual signaling of phase failures
or phase sequences in three-phase
systems.
The phase sequence is arbitrary.
The device is also suitable for
1, 2 or 3-phase operation.
IEC 60255;
DIN VDE 0435 -- -- ✓
5TT3 insulation monitors for
industrial applications
31 To increase system availability and
operating safety through continuous
monitoring of the isolation resistance in
non-grounded direct voltage or
AC voltage systems.
IEC 60255;
IEC 61557 -- -- ✓
7LQ3 monitors for medical
premises
34 For the insulation monitoring of a
medical IT system or load current
monitoring of an IT system transformer
for a non-permissible temperature rise.
Monitoring of the voltage supply with
automatic switchover.
EN 61557-8;
IEC 61557-8;
DIN VDE 0100-710;
IEC 60364-7-710
✓-- --
Monitoring devices for plants and equipment
5TT3 fault signaling units 53 Evaluation and display of fault alarms
and alarm signals for monitoring
industrial plants and control systems.
With 4 inputs and connections for
39 expansion fault signaling units.
IEC 60255,
DIN VDE 0435-303
✓-- ✓
5TT5 EMERGENCY STOP modules 55 For EMERGENCY-OFF switching in
accordance with the Directive 98/37/EC
on Safety of Machines. Safe types of
circuits for machines, plants or test
stations in industrial, commercial and
private enterprise applications.
According to the
Machinery Directive
98/37/EC; EN 954-1
✓-- ✓
Devices Page Application Standards Used in
Non-residential
buildings
Residential
buildings
Industry
© Siemens AG 2016
4Siemens · 10/2015
Introduction
Monitoring Devices
Devices Page Application Standards Used in
Non-residential
buildings
Residential
buildings
Industry
5TT3 level relays 57 Control of liquid levels in containers with
3 electrode connections for 1-step and
2-step level control. High immunity to
interference of the measuring circuit
isolated from the system.
IEC 60255,
DIN VDE 0435
✓-- ✓
5TT3 line circuit relays 59 For disconnecting the voltage of
unused lines when loads are disabled. IEC 60255,
DIN VDE 0435 -- ✓--
5TT3 p.f. monitors 60 For the monitoring of asynchronous
motors for underload and no-load
operation, e.g. fan monitoring in the
case of V-belt breakage, filter
blockages, pump monitoring in the
event of valve closure or dry runs.
IEC 60255,
IEC 61557 -- -- ✓
5TT3 motor protection relays 62 For the prevention of thermal motor
overloads, e.g. due to high switching
frequency, single-phasing, disabled
cooling or excessive ambient
temperatures.
With detection of wire breaks in the
sensor circuit.
IEC 60255,
DIN VDE 0435 -- -- ✓
© Siemens AG 2016
5
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
■
Overview
Plant and operating safety are becoming increasingly important
alongside the protection of personnel. Shutdowns due to the
unexpected tripping of protective devices cause high costs.
However, it is possible to detect residual currents in the electrical
installation before the protective device responds.
Residual current devices (RCD)
Residual current monitors (RCM) monitor residual current in
electrical installations and issue a signal when the residual
current exceeds a set value.
RCMs are used primarily in plants where a fault should result in
a signal, but not in disconnection. This enables plant operators
to detect faults and eliminate their causes before the protective
devices disconnect the installation, which increases plant and
operating safety and cuts costs.
Modular residual current devices (MRCD)
Modular residual current devices (MRCD) monitor residual
currents in electrical systems and trip the MCCB via a shunt or
UVR after an adjustable advance warning if the residual current
exceeds a defined value. See accessories for molded case
circuit breakers in Catalog LV 10, chapter "Molded case circuit
breakers".
This makes it possible for you to offer molded case circuit
breakers with personnel and fire protection in compliance with
EN 60947-2 (Appendix M) (also as a retrofit).
Summation current transformer
The summation current transformer detects all conductors
required to conduct the current, including the neutral conductor
where applicable. In a fault-free system, the magnetizing effects
of the conductors through which current is flowing cancel each
other out for the summation current transformer, i.e. the sum of
all currents is zero. If a residual current is flowing due to an
insulation fault, a residual magnetic field is left in the core of the
transformer and produces a voltage. This voltage is evaluated
using the electronics of the RCM/MRCD. The switched contact
can be used to operate an acoustic/optical signaling device, a
higher-level control system or a circuit breaker for example.
Time characteristic of the rated residual current
Ι
Δn
■
Benefits
• Higher plant availability and operating safety through
permanent monitoring of residual currents
• Adjustable limit values for residual current and response time
enable timely detection and signaling – plant shutdowns are
often avoidable
• Devices for every application:
The summation current transformers are available in various
sizes; the RCMs can be used optionally for signaling and/or
switching
• Additional fire protection can be implemented using the
monitoring system
100 %
n
50 %
t
n
n
Residual current
Time
Alarm
Disconnection
I202_16044
© Siemens AG 2016
6Siemens · 10/2015
5SV8 residual current monitors
Monitoring Devices
Monitoring Devices for Electrical Values
■
Technical specifications
1)
INS: Instantaneous, SEL: Selective.
5SV8000-6KK 5SV8001-6KK 5SV8200-6KK 5SV8101-6KK
Standards EN 62020, IEC 62020 DIN EN 60947-2
(Appendix M),
IEC 60947-2
(Appendix M)
Approvals UL --
Rated operational voltage U
e
V AC 230 230
from a 1-phase auxiliary
voltage source (also
externally)
• Frequency Hz 50/60
Rated residual current
Ι
Δn
•Type A A 0.03 ... 3 0.03 ... 3 0.03 ... 3 0.03 ... 3
(default setting: 30 mA)
•TypeAC A >3 5 ... 30 5 ... 30 --
Response time Δts0.02 ... 5 0.02 ... 10, INS, SEL
1)
0.02 ... 10, INS, SEL
1)
Ι
Δn
= 30 mA:
INS instantaneous
Ι
Δn
> 30 mA:
INS - SEL - 0,06 ... 10
1)
(default setting INS)
Relay contacts 1 × alarm 1 × pre-alarm,
1 × alarm 1 × pre-alarm,
4 × alarm 1 × alarm,
1 × tripping operation
• Rated voltage V AC 230 230 230 230
• Rated current A 6 6 6 6
Summation current transformer mm ∅20 ... 210 35 ... 210
Maximum cable length RCM/CT
(shielded cable) m10
Conductor cross-section mm
2
1.5 0.125 ... 2.08
Test/Reset Yes/Yes
External tripping operation/
external reset
--/Yes Yes/Yes Yes/Yes Yes/Yes
Mounting width MW 2 3 3 3
Degree of protection
• Contacts IP20
•Front IP41
Operating temperature °C -10 ... +50
© Siemens AG 2016
7
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
■
Dimensional drawings
Residual current monitor
5SV8101-6KK (approved configurations)
2 5SV8101-6KK
1 EN 60715 - TH35 - 7.5 35 - 15
55SV8702-0KK 35 mm 5SV8902-1KK
5SV8703-0KK 70 mm 5SV8903-1KK
5SV8704-0KK 105 mm 5SV8904-1KK
5SV8705-0KK 140 mm 5SV8905-1KK
5SV8706-0KK 210 mm 5SV8906-1KK
433
3VL17... 3VL9400-1ST00 3VL9400-1UP00
3VL27... 3VL9400-1ST00 3VL9400-1UP00
3VL37... 3VL9400-1ST00 3VL9400-1UP00
3VL47... 3VL9400-1ST00 3VL9400-1UP00
3VA20... 3VA9988-0BL30 3VA9908-0BB11
3VA21... 3VA9988-0BL32 3VA9908-0BB20
3VA22... 3VA9988-0BL33 3VA9908-0BB24
3VA9908-0BB25
3VA10... 3VA9988-0BL30 3VA9908-0BB11
3VA11... 3VA9988-0BL32 3VA9908-0BB20
3VA9988-0BL33 3VA9908-0BB24
3VA9908-0BB25
12
34
5
I201_18988
Standard DIN rail
Residual current device
Trip element
Molded case circuit breaker
Summation current transformer
1
2
3
4
5
RCM analog, 5SV8000-6KK RCM digital, 5SV8001-6KK, 5SV8200-6KK,
MRCD, 5SV8101-6KK
36
45
67
85
44
686
I202_116027
54 44
686
45
67
85
I202_16028
© Siemens AG 2016
8Siemens · 10/2015
5SV8 residual current monitors
Monitoring Devices
Monitoring Devices for Electrical Values
Summation current transformer
Summation current transformer, 5SV8700-0KK Summation current transformer, 5SV8701-0KK
Type Dimen-
sions
A B C D E F G
5SV8702-0KK 100 79 26 49 35 35 43
5SV8703-0KK 130 110 32 66 70 52 57
5SV8704-0KK 170 146 38 94 105 72 73
5SV8705-0KK 230 196 49 123 140 97 98
5SV8706-0KK 299 284 69 161 210 141 142
Type Rated current Maximum current
1)
5SV8700-0KK ≤ 40 A 240 A
5SV8701-0KK ≤ 63 A 380 A
5SV8702-0KK ≤ 80 A 480 A
5SV8703-0KK ≤200 A 1200 A
5SV8704-0KK ≤ 250 A 1500 A
5SV8705-0KK ≤ 500 A 3000 A
5SV8706-0KK ≤ 600 A 3600 A
1)
Transient starting current, up to max. 2s
Summation current transformer, 5SV8702-0KK, 5SV8703-0KK, 5SV8704-0KK,
5SV8705-0KK, 5SV8706-0KK
All active conductors (including the neutral) must be routed through the
transformer. Cables that are not routed through the transformer must keep
to a minimum clearance of 20 cm. Moreover, the transformers must have an
inside diameter that is at least 1.5 times larger than the outside diameter of
the conductors that pass through it.
Summation current transformer, 5SV8702-0KK, 5SV8703-0KK, 5SV8704-0KK,
5SV8705-0KK, 5SV8706-0KK
Ø46
Ø20
24 60
32 I202_16029
Ø59
Ø30
30 70
32 I202_16030
ØE
G46
6,5
B
F33
A
D
8
C
I202_16031
OK OKOK
OK
I201_19465
© Siemens AG 2016
9
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
■
Circuit diagrams
Residual current monitor
■
More information
Switch positions
RCM digital, 5SV8001-6KK:
RCM digital, 4 channels, 5SV8200-6KK
S/R = Set/Reset
LN
T1T2T3
1S1
1S2
1S1
1S2
T4
1S1
1S2
1S1
1S2
I202_16040a
Reset
Test
123456789
10 11 12 13 14 15
S/R
Alarm contact/alarm Trip contact/trip Alarm contact/alarm Trip contact/trip
Setting "Standard" "Standard" "+" "+"
Without power supply
With power supply
Over limit
CT disconnection
45
6
15 14
13
45
615 14
13
45
6
15 14
13
45
6
45
6
45
6
15 14
13
45
645
615 14
13
© Siemens AG 2016
10 Siemens · 10/2015
5SV8 residual current monitors
Monitoring Devices
Monitoring Devices for Electrical Values
RCM digital, 4 channels, 5SV8200-6KK:
Alarm contact/alarm Trip contacts/trip Trip contacts/trip
Setting "Standard" "Standard" "+"
Without power supply
With power supply
Over limit
CT disconnection
10 1C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
10 1C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
10 1C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
10 1C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
© Siemens AG 2016
11
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
■
Overview
Voltage relays are used for device and plant protection,
supplying safety light devices and the detection of N-conductor
breaks and short-time voltage interruptions.
They are available as undervoltage, overvoltage and under /
overvoltage relays. The devices are equipped with different
functions, depending on their intended use, and comply with the
pertinent regulations.
■
Technical specifications
1)
For rated operational current.
5TT3400 5TT3404 5TT3406 5TT3194 5TT3195
5TT3401 5TT3405
5TT3402
5TT3403
Standards IEC 60255; DIN VDE 0435-110, -303
Rated operational voltage U
c
V AC 230/400 400
Operating range (overload capability) × U
c
1.1 1.35
Rated frequency Hz 50/60
Response values ON-switching × U
c
0.9/0.95 4 % hysteresis
OFF-switching 0.7/0.85 0.7 ... 0.95 0.9 ... 1.3
Minimum contact load V; mA 10; 100
Phase asymmetry Setting accuracy % -- Approx. 5 ... 10 -- Approx.
5...10
Repeat accuracy % -- 1-- 1
Phase failure detection At L1 or L2 or L3 ms 100 --
N-conductor monitoring -- Yes --
Rated insulation voltage U
i
Between coil/contact kV 4
Contacts μ contact (AC-11) A 4
Electrical isolation Creepage distances and
clearances
Actuator/contact mm 35.5
Rated impulse withstand voltage U
imp
Actuator/contact kV > 2.5 > 4
Terminals ± Screw (Pozidriv) 1
Conductor cross-sections
• Rigid, max. mm
2
2 × 2.5
• Flexible, with end sleeve, min. mm
2
0.5
Permissible ambient temperature °C -20 ... +60
Climatic withstand capability Acc. to EN 60068-1 20/60/4
5TT3196
Standards IEC 60255; DIN VDE 0435
Rated operational voltage U
c
V DC 24
Rated power loss P
v
• Coil/drive VA 0.6
• Contacts
1)
per pole VA 0.8
Hysteresis %4
Response values × U
c
• Undervoltage Undervoltage 0.82
• Overvoltage Overvoltage 1.18
Residual ripple tripping ΔU
c
Infinitely variable % 0 ... 15
Overload capability 33 V DC Continuous
35 V DC ms 500
45 V DC ms 10
Creepage distances and clearances mm 4
Rated impulse withstand voltage U
imp
Input/output kV > 2.5
Minimum contact load V/mA 24/300
Rated operational current I
e
AC-11 A 1
AC-1 A 4
Contacts μ contact
Electrical service life In switching cycles at I
e
5 × 10
5
Terminals ± Screw (Pozidriv) 1
Conductor cross-sections
• Rigid, max. mm
2
2 × 2.5
• Flexible, with end sleeve, min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +60
Climatic withstand capability Acc. to EN 60068-1 20/60/4
© Siemens AG 2016
12 Siemens · 10/2015
5TT3 voltage relays
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3407 5TT3408 5TT3410
Standards IEC 60255; DIN VDE 0435-303
Rated operational voltage U
c
V AC 230/400
Operating range (overload capability) × U
c
1.1 1.35 1.2
Rated frequency Hz 50/60
Back-up fuse Terminals L1/L2/L3 A 2
Response values Overvoltage:
OFF-switching × U
c
-- 0.9 ... 1.3 --
ON-switching -- 4 % hysteresis --
Undervoltage:
OFF-switching × U
c
0.8 0.7 ... 1.1 --
ON-switching 0.85 4 % hysteresis --
Minimum contact load V; mA 10; 100
Phase asymmetry Setting accuracy % Approx. 5 ... 10
Repeat accuracy % 1
Phase failure detection At L1, L2 or L3 ms ≥ 20 100 --
OFF delay s-- 0.1 ... 20 0.1 ... 20
Automatic reclosing delay s0.2 ... 2 -- --
Rated insulation voltage U
i
Between coil/contact kV 4
Contacts μ contact (AC-11) A 3 1 4
Electrical isolation Creepage distances and
clearances
Contact/contact mm -- 4--
Actuator/contact mm 45.5
Rated impulse withstand voltage U
imp
Actuator/contact kV > 4
Rated operational power P
s
AC operation:
230 V and p.f. = 1 VA 2000 -- --
230 V and p.f. = 0.4 VA 1250 -- --
DC operation:
U
e
= 24 V and I
e
= 6 A W max. 100 -- --
U
e
= 60 V and I
e
= 1 A W max. 100 -- --
U
e
= 110 V and I
e
= 0.6 A W max. 100 -- --
U
e
= 220 V and I
e
= 0.5 A W max. 100 -- --
Terminals ± Screw (Pozidriv) 1
Conductor cross-sections
• Rigid, max. mm
2
2 × 2.5
• Flexible, with end sleeve, min. mm
2
0.5
Permissible ambient temperature °C -20 ... +60
Humidity class Acc. to IEC 60068-2-30 F
5TT3411 5TT3412 5TT3414 5TT3415
Rated operational voltage U
c
V AC 230 230/400
Overload capability × U
c
1.15 1.1 1.15
Rated frequency Hz 50/60
Response values ON-switching 2 % hysteresis 4 % hysteresis 5 %
OFF-switching × U
c
0.9 0.9 0.85
Minimum contact load V/mA 10/100
Phase failure detection At L1, L2 or L3 ms -- 100 500
N-conductor monitoring -- Yes --
Rated insulation voltage U
i
Between coil/contact kV 4--
Contacts AC-15 NO contacts 32--
AC-15 NC contacts 21--
AC-15 CO contacts -- 1 1 2
Electrical service life in switching cycles AC-15, 1 A, 230 V AC 5 × 10
5
1 × 10
5
Rated impulse withstand voltage Acc. to IEC 60664-1 kV 4 6
Pollution degree 2 2
Terminals ± Screw (Pozidriv) 2--
– Screw (slot) -- 3.5
Conductor cross-sections
• Rigid mm
2
2 × 2.5 1 x 4
• Flexible, with end sleeve mm
2
2 × 1.5 1 x 2.5
Permissible ambient temperature °C -20 … +60 -25 … +60
Climatic withstand capability Acc. to EN 60068-1 20/060/04
© Siemens AG 2016
13
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
■
Characteristic curves
Timing interval of
5TT3400... 5TT3406
undervoltage relays
Timing interval of
5TT3410
N-conductor monitors
11-14
Uab
L1
L2
L3
Uc
11-12
Uab= Release value
I201_07033b
PEN conductor
interruption
N
C
11-14
11-12
I201_07516b
L1, L2, L3
Timing interval of
5TT3407
short-time relays
Timing interval of
5TT3408
under/overvoltage relays
t
v
: Adjustable automatic reclosing delay 0.2 to 20 s t: Adjustable OFF delay 0.1 to 20 s
The undervoltage relay switches at a phase asymmetry of approx. 6 to 8 %,
regardless of the response values for undervoltage. The above diagram
shows the timing interval for undervoltage or asymmetry.
The undervoltage relay switches at a phase asymmetry of approx. 6 to 8 %,
regardless of the response values for undervoltage. The above diagram
shows the timing interval for undervoltage.
0
11-14
11-12
T
0
v
t
v
t
v
t
v
t
c
U
11-14
11-12
I201_07271c
"RESET"
"RESET"
Response time
With fault
storage
Without fault
storage
Good signalGood signal
Good signal
Good signal
Response time
I201_07270b
11-14
11-12
On
t
UH
U
Off
On
Off
On
Off
>U
<U
<U
>U
tt
L1, L2, L3
LED
LED
LED
green
red
red
Hysteresis
Hysteresis
© Siemens AG 2016
14 Siemens · 10/2015
5TT3 voltage relays
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3415 undervoltage relays 5TT3411 and 5TT3412 voltage relays
For characteristic curves of the 5TT3411 and 5TT3412 voltage
relays, see "Monitors for medical premises" from page 34.
■
Dimensional drawings
5TT34, 5TT3194 and 5TT3195 voltage relays
5TT34 undervoltage relays
5TT3196 DC voltage monitors
5TT3410 N-conductor monitors
5TT3411 and 5TT3412 voltage relays
For dimensional drawings of the 5TT3411 and 5TT3412 voltage
relays, see "Monitors for medical premises" from page
34.
Hysteresis
t>0.5s
LED green
LED yellow
t=1min
U
5TT3415
TEST
Us
L1, L2, L3
11-14
21-24
11-12
21-22 I202_01419
5TT3400
5TT3401 5TT3402
5TT3403 5TT3404
5TT3405
5TT3407
5TT3408
5TT3194
5TT3195
5TT3406
I201_11515
90
45
64
43
5
NL3L2L1
2212
21241114
12
1114
L1
L2L1
36
36
36
18
2212
21241114
NL3L2L1
2212
21241114
NL3L2L1
,B
/ /
1
/
/ /
1/
43
55
45
90
I201_06552
5
18
e+ f
23
11 12
24
L1 L2 L3 N
14 11 24 21
12 22
36 54364
45
90
I201_11516
© Siemens AG 2016
15
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
■
Circuit diagrams
Graphical symbols
5TT34 undervoltage relays
5TT3414 5TT3415
5TT3411 and 5TT3412 voltage relays
For circuit diagrams of the 5TT3411 and 5TT3412 voltage relays,
see "Monitors for medical premises"
from page 34
.
Typical circuit for 5TT3195, 5TT340 voltage relays
1, 2, 3-phase operation against N
Typical circuit for 5TT3196 DC voltage monitors
5TT3194
5TT3195 5TT3402
5TT3403
5TT3404
5TT3405
5TT3406
5TT3407
5TT3408
5TT3410
5TT3196 5TT3400
5TT3401 5TT3414 5TT3415
N
L1 L2 L3 24 22
21
14 12
11
23
1224
11
e(+)
f
N
L1 L2 L3 14 12
11
N
11
L1 L2 L3 12 14
I202_01420
N
11 21
L1 L2 L3 12 14 22 24
I202_01421
11 12 14
21 22 24
11 12
14
L1
L3
L2 N
21 22
24
11 12 14
11 12
14
L1
L3
L2 N
N
L1 L2
L3
N
L1 L2
L3
I202_01415
14 12 24 22
11 21
I201_07594c
L1 L2 L3 N
L1 N
One-phase operation
14 12 24 22
11 21
I201_07595c
L1 L2 L3 N
L1 L2
Two-phase operation
14 12 24 22
11 21
I201_07596c
L1 L2 L3 N
L1 L3 L4L2
Three-phase operation
If 0.82 × U
c
is fallen short of, or 1.18 × U
c
exceeded, or if the residual ripple
is too high, the 11/12 contact closes and the 23/24 contact opens.
5TT3 196
L1
L2
L3
e+
f
I201_07274a
11
12
23
24
Load
24 V DC
23-24
11-12
c
c
1,18 x U
0,82 x U
I201_07035a
© Siemens AG 2016
16 Siemens · 10/2015
5TT3 voltage relays
Monitoring Devices
Monitoring Devices for Electrical Values
Typical circuit for
5TT3401, 5TT3403, 5TT3405
undervoltage relays
Typical circuit for
5TT3404, 5TT3405, 5TT3406, 5TT3408
under/overvoltage relays
One application of undervoltage relays is the switching to a safe power supply
after a fault.
Buildings are distinguished according to use, such as business premises,
exhibition areas or guest houses. These are all covered generically as
rooms/buildings "where people meet".
There is a fault if the voltage of the general power supply drops for 0.5 seconds
> 15 % in relation to the rated voltage (i.e. 195 V at 230 V).
In this case the lighting must be switched to a safety power supply after 0.5 to
15 s depending on the type of use. A safety power supply may be: a battery
system, a generating set or a quick-starting standby generating set.
These voltage relays can only be used for 3-phase operation. They
monitor not only under- and overvoltages in accordance with their
description, but also reverse voltage, asymmetry and N-conductor
breaks.
14 12 24 22
11 21
L1' L2' L3' N'
I201_07272d
L1 L2 L3 L4
K2
L1 L2 L3 N
K1
K1 K2
Emergency
power supply
Standard
power supply
Emergency
lighting
Standard
lighting
3 AC 230 V
L1 L2 L3 N
L1 L2 L3 N
K1
14 12 24 22
11 21
M
PE
Phase failure
I201_07273d
© Siemens AG 2016
17
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
Typical circuit for
5TT3407 short-time relays Typical circuit for
5TT3407 short-time relays
In the case of sensitive technical sequences, it is often not possible to tell
whether this interrupt has interfered with the process sequence. The circuit
disconnects the power supply, which can then be switched back by using
the RESET pushbutton.
In simple cases, it may be sufficient for a short-time interruption to be
registered without the need to disconnect the power supply. In the case of a
short-time interruption, this is counted by the pulse counter. The pulse
counter can be reset if required.
14 12 24 22
11 21
I201_07597d
L1 L2 L3 N
L1 L2 L3 N
K1 K1
Reset
3 AC 230 V
14 12 24 22
11 21
L1 L2 L3 N
L1 L2 L3 N
1234
5TT3407 7KT5883
I201_07598d
Reset
230 V 3 AC
Typical circuit for
5TT3410 N-conductor monitors
L1
5TT3410
L2 L3
N
K1
L1
L2
L3
N
PE
F1
F2
F3
S1 F4 F5 F6
11
14
K1 I201_07517b
Test and
service
switch
© Siemens AG 2016
18 Siemens · 10/2015
5TT3 voltage relays
Monitoring Devices
Monitoring Devices for Electrical Values
■
More information
General voltage monitoring
For general device and plant protection, voltage relays with
switching thresholds of 0.7 × U
c
, i.e. 161 V are used. If they have
fixed, non-changeable switching thresholds, they switch back to
normal operation at 0.85 × U
c
, 195 V or at 0.9 × U
c
, 207 V,
depending on the version. If they have adjustable thresholds,
they switch back to normal operation with 4 % hysteresis, 9 V.
1, 2 or 3 phases to N or 3 phases to N
All voltage relays require an N-conductor. Devices for 1, 2 or 3
phases to N can be used for 1-, 2-, or 3-phase operation.
Devices for 3 phases to N require all three phases, whereby the
sequence in which they are connected is irrelevant.
Asymmetry detection
If different voltages occur in a three-phase network, this is called
phase asymmetry. Some voltage relays detect an asymmetry of
approx. 6 to 8 % of the phase-to-neutral voltage, i.e. approx.
14 to 16 V and switch off. This type of operation is used for
example to protect motors against a "skew".
N-conductor monitoring
An N-conductor break causes a skew, depending on the phase
load. In extreme cases, this could cause 400 V to be applied to
a phase and destroy the connected devices. Each voltage relay
with asymmetry detection is tripped by an N-conductor break, if
the phase displacement is at least 14 to 18 V.
The 5TT3410 N-conductor monitor detects a phase displace-
ment of 5 %, which is roughly 12 V. This provides earlier protec-
tion against overvoltage for connected devices. The N-conduc-
tor monitor does not react if the voltage drops or rises in all
phases simultaneously; or if a phase is swapped with the
N-conductor.
Reverse voltage detection
If a phase fails, the motors feed a reverse voltage to the missing
phase. However, voltage relays with reverse voltage detection
will disconnect in this case because they are monitoring the
phase angle.
Phase failure detection
If a phase fails completely, the voltage relays disconnect with a
delay as specified in the technical specifications.
Short-time failure detection
Short-time failures upwards of 20 ms cannot be detected with
conventional voltage relays. However, they can occur in the case
of system transfers or lightning strikes and can lead to
uncertainty for sensitive process sequences or measuring
procedures. The 5TT3407 short-time voltage relay has a reset
function that allows a procedure to be permanently interrupted
after a fault.
Back-up fuse
The voltage relays do not require a back-up fuse as device
protection. However, they are often installed in junctions, i.e. in
main supply systems with high fusing. In this case, the supply
lead to the voltage relay must be short-circuit resistant. The
back-up fuse only serves as line protection.
5TT3411 and 5TT3412 voltage relays
For control elements of the 5TT3411 and 5TT3412 voltage
relays, see "Insulation monitors for medical premises"
from
page 34.
5TT3
194
5TT3
195
5TT3
196
5TT3
400
5TT3
401
5TT3
402
5TT3
403
5TT3
404
5TT3
405
5TT3
406
5TT3
407
5TT3
408
5TT3
410
5TT3
411
5TT3
412
Overvoltage ✓✓✓-- -- -- -- -- -- -- -- ✓-- ✓ ✓
Undervoltage -- -- ✓✓✓✓✓✓✓✓✓✓-- -- --
Monitoring of safety light devices -- -- -- -- ✓-- -- -- ✓-- -- -- -- -- --
Monitoring of medical premises -- -- -- -- -- -- -- -- -- -- -- -- -- ✓ ✓
Monitoring of N-conductor -- -- -- -- -- -- -- -- -- -- -- -- ✓-- ✓
Monitoring of short-time interruptions -- -- -- -- -- -- -- -- -- -- ✓-- -- -- --
1, 2, 3-phase to N ✓-- -- ✓✓✓✓-- -- -- ✓-- -- ✓ ✓
3 phases to N -- ✓-- -- -- -- -- ✓✓✓-- ✓-- -- --
Asymmetry detection -- ✓-- -- -- -- -- ✓✓✓-- ✓ ✓ -- ✓
N-conductor monitoring -- -- -- -- -- -- -- ✓✓✓✓✓✓-- ✓
Reverse voltage detection -- ✓-- -- -- -- -- ✓✓✓-- ✓-- -- ✓
Short-time failure detection -- -- -- -- -- -- -- -- -- -- ✓-- -- -- --
Phase failure detection -- -- -- ✓✓✓✓✓✓✓✓✓-- -- ✓
Switching thresholds: -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
0.7/0.9 × U
c
, non-adjustable -- -- -- ✓-- ✓-- ✓-- -- -- -- -- -- --
0.8/0.85 × U
c
, non-adjustable -- -- -- -- -- -- -- -- -- -- ✓-- -- -- --
0.85/0.95 × U
c
, non-adjustable -- -- -- -- ✓-- ✓-- ✓-- -- -- -- -- --
0.7 ... 0.95 × U
c
, 5 % hysteresis, adjustable -- -- -- -- -- -- -- -- -- ✓-- -- -- -- --
0.7 ... 1.1 × U
c
, 4 % hysteresis, adjustable -- -- -- -- -- -- -- -- -- -- -- ✓-- -- --
0.9 ... 1.3 × U
c
, 4 % hysteresis, adjustable ✓✓-- -- -- -- -- -- -- -- -- ✓-- -- --
Adjustable time delay -- -- -- -- -- -- -- -- -- -- -- ✓-- -- --
Contact: 1 CO -- -- -- ✓✓-- -- -- -- -- -- -- -- -- --
Contact: 2 CO ✓✓-- -- -- ✓✓✓✓✓✓✓✓-- --
Contact: 1 CO, 1 NO, 1 NC -- -- -- -- -- -- -- -- -- -- -- -- -- -- ✓
Contact: 1 NO, 1 NC -- -- ✓-- -- -- -- -- -- -- -- -- -- -- --
Contact: 2 NO, 2 NC -- -- -- -- -- -- -- -- -- -- -- -- -- ✓--
© Siemens AG 2016
19
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage and frequency relays
■
Overview
The voltage and frequency relay monitors the status of the grid
in the case of in-plant generation systems. Violation of an upper
or lower limit results in shutdown and disconnection of the
generation system from the grid. Connection or automatic re-
connection of the generation system to the grid only takes place
when the grid frequency and the grid voltage have remained
within their respective tolerance ranges without interruption for
the duration of an adjustable time delay t
W
. Following shutdown
due to a brief interruption, re-connection takes place when the
grid frequency and grid voltage have remained within the
tolerance range for 5 s without interruption.
■
Benefits
• Clearance certification of the German Employer's Liability
Association (Energy, Textile, Electrical and Media Products)
• Default settings in accordance with VDE-AR-N-4105
• The voltage and frequency relay meets the high requirements
of VDE AR-N 4105
• It can be used both for centralized and integrated grid and
plant protection
• The latching rotary switches enable fast and easy setting of
the required values
• An illuminated LCD display provides plant status information
• The voltage and frequency relay ensures single-fault
tolerance as stipulated in the VDE-AR-N 4105 application
guide
• Passive procedure for detecting islanding
■
Application
Enable via external contact
Enable using external voltage 24 V AC, 40 ... 400 Hz
I202_02440
Coupling switch 1
Coupling switch 2
3-phase
Safe external
disconnection,
e.g. via ripple
control receiver
CG = clock-pulse generator
Inverters
Generator(s)
Generation system
Low-voltage
system
CG 2CG 1
L1
L2
L3
N
L1 L2 L3 N 11
12
Q1
KA
KE
Q2
14 22 24 32 34
21 31
X1
B1
B2
X2
Coupling switch 1
Coupling switch 2
enabled disabled
CG =clock-pulse generator
external CG
Inverters
Generator(s)
Generation system
Low-voltage
system
CG 2
L1
L2
L3
N
L1 L2 L3 N 11
12
Q1
KA
KE
Q2
14 22 24 32 34
21 31
X1
B1
(+) (-)
B2
X2
I202_02441
© Siemens AG 2016
20 Siemens · 10/2015
5TT3 voltage and frequency relays
Monitoring Devices
Monitoring Devices for Electrical Values
■
Technical specifications
Voltage and frequency relays
5TT3426 5TT3427
Standards IEC/EN 60255-1; IEC/EN 61000; VDE-AR-N-4105
Supply voltage U
v
V AC 3 x 85 ... 288
Supply voltage B1/B2 V AC 24 (at 40 ... 400 Hz)
Rated operational voltage U
c
V AC 230/400
Rated impulse withstand voltage Acc. to IEC 60664-1
• Contact 31, 32, 34 kV 6
• KA, KE and measuring circuit kV 4
• Pollution degree 2
Recommended fuse
Measuring inputs
gG/gL A 6
Temperature range °C -20 ... +60
(in the range 0 °C ... -20 °C, there may be restrictions to the functionality of the
LCD display)
Conductor cross-sections
• Rigid, flexible mm
2
0.5 ... 4
• Flexible with end sleeve mm
2
0.5 ... 2.5
• Multi-conductor connection 2 conductors of same
cross-section mm
2
0.5 ... 1.5
Output relay
Mode of operation Quiescent current
Contacts
• NO contacts AC15 A AC/V AC 3/230
• NC contacts AC15 A AC/V AC 1/230
Thermal current A AC 5
Electrical service life
• NO contacts AC15, 1A, AC230 Switching
cycles 300000
Rise in frequency Hz 50.2 ... 51.2
Drop in frequency Hz 47.0 ... 49.8
Rise in voltage
• Phase/neutral V AC 253 ... 288
• Phase/phase V AC -- 438 ... 498
Drop in voltage
• Phase/neutral V AC 184
• Phase/phase V AC -- 319
Mean rise in voltage over 10 minutes
• Phase/neutral V AC 253 ... 267
• Phase/phase V AC -- 438 ... 462
Re-connection time t
w
sec 0 ... 600
Disconnection response time ms < 100
Connection condition
• Frequency % 5
•Voltage Hz 47.5 ... 50.05
Accuracy
• Frequency % (± 1 digit) ≤±1
• Voltage % (± 1 digit) ≤±0.02
Dimensions W x H x D 70 x 90 x 71 mm
© Siemens AG 2016
21
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage and frequency relays
■
Dimensional drawings
5TT3426
5TT3427
■
Circuit diagrams
5TT3426 and 5TT3427
I202_02444
71,8 637
X1 B1 B2 X2 11 12 14 21 22 24
L1 L2 L3 N KA KE 31 32 34
90
I201_18954
X1 B1 B2 X2 11 12 14 21 22 24
L1 L2 L3 N KA KE 31 32 34
K3
U>>(%) f<(Hz) f>(Hz)
>50,8
<50,9
random
tw(s)
U>=80%
5TT3 426
Mode >2s
Test
f>(Hz)
K1 K2
110 112 114
115
116
118
125 120
47,0 47,5 47,8
48,2
48,6
49,0
49,8 49,4
50,2 50,3 50,4
50,5
50,6
50,7
50,8 50,8
Off 110 111
112
113
114
126 125
030 60 90
180
120
240
600 450 300
50,8 50,9 51,0
51,1
51,2
51,3
51,5 51,4
U10m>(%)
B1/ K1/ K3 KA/
B2 K2 KE
I201_18955
X1 B1 B2 X2 11 12 14 21 22 24
L1 L2 L3 N KA KE 31 32 34
K3
U>>(%) f<(Hz) f>(Hz)
>50,8
<50,9
random
tw(s)
U>=80%
5TT3 427
Mode >2s
Test
f>(Hz)
K1 K2
110 112 114
115
116
118
125 120
47,0 47,5 47,8
48,2
48,6
49,0
49,8 49,4
50,2 50,3 50,4
50,5
50,6
50,7
50,8 50,8
Off 110 111
112
113
114
126 125
030 60 90
180
120
240
600 450 300
50,8 50,9 51,0
51,1
51,2
51,3
51,5 51,4
U10m>(%)
B1/ K1/ K3 KA/
B2 K2 KE
Channel 1
Error
Channel 2
L1 L2 L3 N
X1 B1 B2 X2 11 12 14 21 22 24
KAKE 31 32 34
U < >
f < >
Ū10m>
12
11
14
K1
32
31
34
K3
tw
U < >
f < > 22
21
24
K2
tw
I202_02439
Ū10m>
© Siemens AG 2016
22 Siemens · 10/2015
5TT6 current relays
Monitoring Devices
Monitoring Devices for Electrical Values
■
Overview
Current relays monitor single and three-phase systems for the
flow of current, e.g. in emergency lighting installations, and the loading of motors. They are available as undercurrent,
overcurrent and under/overcurrent relays.
■
Technical specifications
5TT6111 5TT6112
Standards IEC 60255; DIN VDE 0435-303
Rated operational current I
c
A1 ... 10
Rated operational voltage U
c
V AC 230
Primary operating range × U
c
0.9 ... 1.1
Overload capability, continuous A15
Overload capability, short-time At 50 °C ambient
temperature max. 3 s A20
Rated frequency Hz 50/60
Response values ON-switching Infinitely variable
OFF-switching Permanent, 4 % hysteresis
Switching delay t
v
Infinitely variable s 0.1 ... 20
Response time Non-adjustable ms Current corresponds to the rated operational power of the
continuous-flow heater
Minimum contact load V; mA 10; 100
Rated insulation voltage U
i
Between coil/contact kV 2.5
Contacts
μ contact (AC-15) NO contacts A 3
NC contacts A 1
Electrical isolation Creepage distances and mm 3
Actuator/contact
Rated impulse withstand voltage U
imp
Actuator/contact kV > 4
Terminals ± Screw (Pozidriv) 1
Conductor cross-sections Rigid max. mm
2
2 × 2.5
Flexible, with end sleeve min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +60
Climatic withstand capability Acc. to EN 60068-1 20/60/4
5TT6113 5TT6114 5TT6115 5TT6120
Standards IEC 60255; DIN VDE 0435-303
Rated operational current I
c
4 ranges 1 range
A0.1 ... 1 0.5 ... 5
A0.5 ... 5
A1 ... 10
A1.5 ... 15
Rated operational voltage U
c
V AC 230
Primary operating range × U
c
0.9 ... 1.1
Overload capability, continuous A20 15
Overload capability independent of
measuring range
Max. 3 s A 30
Rated frequency Hz 50/60
Response values ON-switching Infinitely variable
OFF-switching Permanent, 4 % hysteresis
Switching delay t
v
Infinitely variable s 0.1 ... 20
Response time Non-adjustable ms See: www.siemens.com/lowvoltage/manuals
Minimum contact load V; mA 10; 100
Rated insulation voltage U
i
Between coil/contact kV 2.5
Contacts
μ contact (AC-15) NO contacts A 5
NC contacts A 1
Electrical isolation Creepage distances and mm 3
Actuator/contact
Rated impulse withstand voltage U
imp
Actuator/contact kV > 4
Terminals ± Screw (Pozidriv) 1
Conductor cross-sections Rigid max. mm
2
2 × 2.5
Flexible, with end sleeve min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +60
Climatic withstand capability Acc. to EN 60068-1 20/60/4
© Siemens AG 2016
23
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT6 current relays
■
Dimensional drawings
5TT611 current relays 5TT6120 current relays
■
Circuit diagrams
Graphical symbols
5TT6111
5TT6112 5TT6113
5TT6114 5TT6115 5TT6120
I201_11518
90
45
64
43
5
Z1 Z4
24
22
21
ik
Z2 Z3
14
12
11
1
AA2
36
L/k
L/iL/i
Z1 Z4
24
22
21
ik
Z2 Z3
14
12
11
N
11
12 14
1
AA2
18 36
44
42
41
i3 k3
34
32
31
1
AA2
72
24
22
21
i1 k1
14
12
11
1
AA2
I201_11517
90
45
55
43
5
5TT6111
5TT6112 5TT6113 5TT6114 5TT6115 5TT6120
>
LL
11
1214
N
ik
>
A1 A2
21
11
22241214
Z4
Z3
Z2
Z1
ik
<
A1 A2
2111
22241214
Z4
Z3
Z2Z1
ik
><
A1 A2
2111
22241214
Z4
Z3
Z2Z1
ik
<
>
2111
22241214
k1-k3i1-i3
A1 A2
4131
42443234
Typical circuit for
5TT6111 undercurrent monitors Typical circuit for
5TT6114 overcurrent monitors
Measurement with transformer
L/i N
L1
N
12 14
11L/k
To the 5TT3460 or
5TT3461 fault
signaling relay
230 V AC I201_07522c
i
5TT6114
A1 A2
k
K1
PE M
L1
L2
L3
N
PE
K1
12 14 22 24
11 21
3 AC 230/400 V
I201_07560b
© Siemens AG 2016
24 Siemens · 10/2015
5TT6 current relays
Monitoring Devices
Monitoring Devices for Electrical Values
■
More information
Direct measurement,
transformer measurement
All current relays can be connected with direct measurement or
through transformers.
N potential
Versions 5TT6113 to 5TT6120 can be connected with a separate
N potential.
Response time
Current relays are not circuit-protective devices for lines.
They switch with a delay in the ms range.
Overload capability
Independent of the set measuring range and set measured
value, current relays can be permanently overloaded up to 15 A
and 20 A; for 3 s; even up to 20 A and 30 A.
Buildings/object-safe guiding lights
In the approach corridors of planes, high buildings must be
fitted with position lighting. The same planning instructions apply
to the monitoring of this type of lighting and runway lighting as
the monitoring of emergency lighting.
Monitoring of emergency lighting with incandescent lamps
The function of emergency lighting according to DIN VDE 0108
must be checked at regular intervals. The operational current is
continuously monitored using current relays. The lighting can
either be integrated in the general lighting system or just
supplied on demand with emergency current.
The current relay is set so that it switches on at the max. lamp
current. If an incandescent lamp fails, a fault is signaled.
Monitoring of motors
If the warning is sent early enough, the fault can be eliminated
before the motor starts to overheat and the circuit breaker
switches the motor off.
Current relays reliably safeguard the monitoring of fault-free
running motors and, in some cases are more suitable than a
voltage relay, which is geared more towards motor protection.
Typical circuit for
5TT6114
With direct measurement up to 15 A for overcurrent
measurement
Typical circuit for
5TT6120
With direct measurement of up to 5 A for
undercurrent/overcurrent measurement
i
5TT6114
A1 A2
k
K1
PE M
L1
L2
L3
N
PE
K1
12 14 22 24
11 21
3 AC 230/400 V
I201_07559b
5TT6120
A1 A2
K1
PE M
L1
L2
L3
N
PE
K1
12 14 22 24
11 21
i
k
1i2i3
k2k3
1
32 34 42 44
31 41
min max
3 AC 230/400 V
I201_07561b
Device overview 5TT6111 5TT6112 5TT6113 5TT6114 5TT6115 5TT6120
Undercurrent ✓-- ✓-- ✓ ✓
Overcurrent -- ✓-- ✓ ✓ ✓
Single-phase ✓✓✓✓✓--
Three-phase -- -- -- -- -- ✓
Separate N potential -- -- ✓ ✓ ✓ ✓
Measuring ranges: Jumper:
0.1 - 1 A Z1 – Z2 -- -- ✓✓✓--
0.5 - 5 A Z1 – Z3 -- -- ✓ ✓ ✓ ✓
1 ... 10 A Z1 – Z4 ✓✓✓✓✓--
1.5 - 15 A Z1 – Z3 – Z4 -- -- ✓✓✓--
Can be programmed over jumpers -- -- ✓✓✓--
Contacts 1 CO ✓✓-- -- -- --
2 CO -- -- ✓ ✓ ✓ ✓
© Siemens AG 2016
25
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT6 current relays
Example: Screw conveyor
Hard objects in screw conveyors, e.g. in sewage treatment
plants, can often jam the conveyor system. Appropriately set,
the current relay signals over its contact(s) that a hazardous
situation has occurred and threatens to block the motor.
Example: Agitators
As with the conveyor processes, changes to the viscosity can
lead to an overload of the motors.
Example: Crane motor control system
The current monitoring of the main motor (hoisting motor)
ensures that the electrical holding brake is not released until the
main motor is in operation and the load is held.
Example: Dust extraction
In the interests of work safety and to protect against massive
dust development, it is essential to ensure that the dust
extraction system is working perfectly before a saw or sanding
machine is switched on.
Planning the monitoring of an incandescent lamp
Current relays have a hysteresis of approx. 4 %. The smallest
lamp must not exceed the set measuring range by more than
8%.
Example: 12 lamps of 100 W each = 1200 W, which corresponds
to a current of approx. 5.2 A. If a lamp fails, the current drops by
0.4 A. This 0.4 A corresponds to 8 % of the set measured value
5.2 A.
Response time
The response time of the fault signal is produced by the
“adjustable switching delay" (see the technical specifications)
and an additional delay, which is determined from the actual
current and the set value.
Function charts for
5TT61 overcurrent relay signal
5TT61 overcurrent relay signal
FPickup Dropout
ms ms
110 250
270 70
5120 30
10 180 15
20 220 10
30 240 12
F = I
act
I
meas
I
act
: Instantaneously flowing current
I
meas
: Set current threshold value to be measured
Pickup: With an overcurrent relay, the contact 11 – 14 (21 – 24) to the fault
signal closes when the instantaneous current flowing is higher
than the switching threshold.
The relay picks up.
Dropout: With an overcurrent relay, the contact 11 – 12 (21 – 22) to the fault
signal closes when the instantaneous current flowing is higher
than the switching threshold.
The relay drops out.
I201_07508c
On
t
Off
On
Off
LED
LED
t
14
2
U
N
N
t
v
t
v
green
red
Fault
Hyst.
I201_07469b
On
t
U
Off
On
Off
LED
LED
t
14
2
t
N
N
v
green
red
Fault
Hyst.
© Siemens AG 2016
26 Siemens · 10/2015
5TT6 current relays
Monitoring Devices
Monitoring Devices for Electrical Values
Function charts for
5TT6115 under/overcurrent relay signal
Contrary to all other current relays, a fault signal is always output
over the contact 11 – 14 (21 – 24). The red LEDs indicate
whether the signal is for an undercurrent or an overcurrent.
I201_07472b
On
t
U
Off
On
Off
LED
LED
t
t
14
2
On
Off
LED
N
N
tv
vtv
green
red
red
Fault Fault
Hyst.
Hyst.
© Siemens AG 2016
27
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 reverse power relays
■
Overview
The 5TT3424 and 5TT3425 reverse power relays monitor the
direction of the energy transport in an electric grid. This may be
necessary where public grids and industrial grids intersect, e.g.
when using emergency generators, motor-driven generators,
etc.
■
Technical specifications
Reverse power relays
5TT3424 5TT3425
Standards IEC 60255; DIN VDE 0435-303
Rated voltage U
n
V AC 230, 3-phase systems without N 400, 1- or 3-phase systems without N
Rated current I
n
A 5
Response value Reverse power % 2 ... 20
Hysteresis %12.5 of the set response value
Rated frequency Hz 45 ... 65
Response delay t
an
s0.2 ... 10, adjustable
Contact arrangement 2 CO
Output
Contact arrangement 2 CO
Breaking capacity IEC 60947-5-1
• NO contacts AC15 A AC/V AC 3/230
• NC contacts AC15 A AC/V AC 1/230
• Acc. to DC 13 A DC/V DC 1/24
Thermal current A2 x 5
Electrical service life IEC 60947-5-1
• NO contacts AC 15, 3A, 230 AC Switching
cycles 2 x 10
5
Permissible switching frequency Switching
cycles/h 1800
Short-circuit strength,
max. melting fuse
IEC 60947-5-1 4 A gL
Mechanical service life Switching
cycles 30 x 10
6
General data
Permissible ambient/storage temperature °C -20 ... +60
Clearance and creepage
distances
• Rated impulse withstand voltage kV 4
• Pollution degree IEC 60664-1 II
Degree of protection
• Enclosure IP40
• Terminals IP20
Wire connections
• Fixed screw terminal (S) 0.2 ... 4 mm
2
solid or 0.2 ... 1.5 mm
2
stranded wire with sleeve
Dimensions W x H x D 70 x 90 x 71 mm
© Siemens AG 2016
28 Siemens · 10/2015
5TT3 fuse monitors
Monitoring Devices
Monitoring Devices for Electrical Values
■
Overview
Fuse monitors serve to monitor all types and versions of melting
fuses that cannot be equipped with a fault signal contact. This enables integration in fault signaling circuits or a central alarm in
order to improve plant availability.
■
Technical specifications
■
Dimensional drawings
■
Circuit diagrams
Graphical symbols
■
More information
Typical circuit, function chart
If the fuse fails, the motor is immediately disconnected
(prevention of two-phase run). After changing the fuse, the motor
can be restarted by pressing the "ON" button.
Unlike conventional motor circuit breakers, it is not possible to
switch the motor on if the fuse is faulty.
Note:
The internal resistance of the measuring paths of the fuse
monitor is in the MΩ range so that the VDE regulations with
regard to touch voltage are met in the event of faulty fuses
(> 1000 Ω/V). To isolate the main switch, it must be switched off.
The enclosed label should be affixed to the switchgear as a
reminder.
5TT3170
Standards IEC 60255; DIN VDE 0435-110
Rated operational voltage U
c
V3 AC 380 ... 415
Primary operating range × U
c
0.8 ... 1.1
Rated frequency Hz 50 ... 400
Internal resistance of measuring paths Ω/V > 1000
Max. permissible feedback %90
Response/release time ms < 50
Rated impulse withstand voltage U
imp
Input/output kV > 4
Rated operational voltage U
e
V AC 250
Rated operational current I
e
AC-1 A 4
Electrical service life AC-11 In switching cycles at 1 A 1.5 × 10
5
Terminals ± Screw (Pozidriv) 1
Conductor cross-sections Rigid, max. mm
2
2 × 2.5
Flexible, with end sleeve, min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +45
Climatic withstand capability Acc. to EN 60068-1 20/45/4
I201_11512
90
45
64
43
5
15
L3L2
L1
14
L3L2L1
36
L3L2 14L1
13
L3'L2'L1'
M
N
L2
L1 L2 L3
13
I201_07251b
3 ~
L1 L3
L2' 14L1' L3'
L
F1 F2 F3
3 AC 400 V
Off
On
L1/L2/L3
13-14
I2_07037
© Siemens AG 2016
29
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 phase and phase sequence monitors
■
Overview
Phase monitors monitor the voltages in three-phase system and
signal the power failure of one or more phases over a floating
contact. Phase sequence monitors monitor the phase sequence
in three-phase systems and signal any changes in the phase
sequence – change of rotating field – over a floating changeover
contact.
■
Technical specifications
■
Dimensional drawings
■
Circuit diagrams
Graphical symbols
5TT3421 5TT3423
Standards IEC 60255; DIN VDE 0435
Rated operational voltage U
c
V AC 230/400 400
Primary operating range × U
c
0.8 ... 1.1
Rated frequency Hz 50/60
Rated power loss P
v
Electronics VA 9
Contacts VA 0.2
Rated operational voltage U
e
V AC 250
Rated operational current I
e
A 4
Minimum contact load V; mA 10; 100
Rated insulation voltage U
i
Between coil/contact kV 4
Contacts μ contact (AC-11) A 3
Electrical isolation Creepage distances and
clearances
Actuator/contact mm 4
Rated impulse withstand voltage U
imp
Actuator/contact kV > 2.5
Terminals ± Screw (Pozidriv) 1
Conductor cross-sections Rigid, max. mm
2
2 × 2.5
Flexible, with end sleeve, min. mm
2
--
Degree of protection Acc. to EN 60529 IP20, with connected conductors
Safety class Acc. to EN 61140/VDE 0140-1 II
Permissible ambient temperature °C -20 ... +60
Climatic withstand capability Acc. to EN 60068-1 20/60/4
5TT3421 5TT3423
1
1
2
1
4
1
3
L
1
L
2
L
2
1
4
1
1
1
3L
1
LN
2
L
18
I201_10780
18
90
45
64
43
5
5TT3421 5TT3423
N
L1 L2 L3
11
12
14
L1 L2 L3
11
1214
© Siemens AG 2016
30 Siemens · 10/2015
5TT3 phase and phase sequence monitors
Monitoring Devices
Monitoring Devices for Electrical Values
■
More information
Typical circuit diagrams
5TT3421 phase monitors
The phase monitor can be operated either in 1, 2 or 3-phase
operation.
5TT3423 phase sequence monitors
Phase sequence monitors must always be connected in
three-phase.
Single-phase operation
I201_10776a
14 12
11
L1 L2 L3 N
NL1
Two-phase operation
14 12
11
I201_10777a
L1 L2 L3 N
L1 L2 N
Three-phase operation
14 12
11
I201_10778
L1 L2 L3 N
L1 L3L2 N
I2_10779a
L1 L2 L3
K1
14 12
11
M
L1 L2 L3PE
© Siemens AG 2016
31
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 insulation monitors for industrial applications
■
Overview
Insulation monitors are used for protection of persons and
against fire in non-grounded systems (IT systems). The
insulation resistance of the system being monitored is measured
against ground.
Such measurements are prescribed in accordance with
DIN VDE 0100-410 – Power installations up to 1,000 V –
Protection against electric shock.
■
Technical specifications
■
Dimensional drawings
5TT3470 5TT3471
Supply voltage U
c
V AC 220 ... 240 --
V DC -- --
Primary operating range With AC supply × U
c
0.8 ... 1.1 --
For DC supply V DC -- --
Frequency range for U
c
Hz 45 ... 400 --
Rated power loss P
v
VA Approx. 2 --
For DC supply W -- Approx. 1
Rated impulse withstand voltage U
imp
Terminals A1 to A2 kV < 4 < 4
Ter m i nals L t o PU kV < 4 < 4
Terminals A1, A2 to L, PU kV < 4 < 3
Terminals against contacts kV < 6 < 6
Measuring circuit For three-phase and AC systems For direct voltage systems
Measurement voltage range U
meas
V AC 0 ... 500 --
V DC -- 12 ... 280
Primary operating range × U
meas
0 ... 1.1 0.9 ... 1.1
Frequency range for U
meas
Hz 10 ... 10000 --
Alarm values Measuring shunt R
AL
kΩ5 ... 100 5 ... 200
Setting of alarm value On absolute scale Infinitely variable Infinitely variable
Alternating current internal resistance Internal test resistance kΩ> 250 --
Direct current internal resistance Internal test resistance kΩ> 250 --
L+ and L- to PU kΩ-- 75 each
Measurement voltage U
meas
Internal V DC Approx. 15 --
Max. measurement current I
meas
Short circuit mA < 0.1 0.2 ... 4 depending on the
voltage
Direct interference voltage Max. permissible V DC 500 --
Response delay At R
AL
50 kΩ and 1 μF
and ∞ to 0.9 × R
meas
s< 1.3 0.8
and R
meas
from ∞ to 0 Ωs< 0.7 0.4
Switching hysteresis At R
meas
50 kΩ%15 10 ... 15
Contacts μ contact 2 CO 2 CO
Rated operational voltage U
e
V230 AC DC 12 ... 280
Rated operational current I
s
Thermal current I
th
A 4 4
DC-13 at 24 V DC A -- 2
DC-13 at 250 V DC A -- 0.2
AC-15 A -- 3
AC-15 NO contacts A 5--
AC-15 NC contacts A 2--
Terminals ± Screw (Pozidriv) 2 2
Conductor cross-sections Rigid, max. mm
2
2 × 2.5
Flexible, with end sleeve, min. mm
2
1 × 0.50
Permissible ambient temperature °C -20 ... +60
Degree of protection Terminals (acc. to EN 60529) IP20
Enclosure (acc. to EN 60529) IP40
Resistance to climate Acc. to EN 60068-1 20/060/04
5TT3470 5TT3471
24
22
21
14
12
11
I201_11519
90
45
64
43
5
X1 LT
L+ L-
PE PT
36
A1 A2
24
22
21
14
12
11
LT1 LT2
L
PE PT
36
© Siemens AG 2016
32 Siemens · 10/2015
5TT3 insulation monitors for industrial applications
Monitoring Devices
Monitoring Devices for Electrical Values
■
More information
Function charts
l
Typical circuit diagrams
5TT3470 for three-phase and AC systems 5TT3471 for direct voltage systems
5TT3470, 5TT3471
I201_11522
Uc
R
11-14
11-12
11-14
11-12
Insulation resistance
Set value
Without fault storage
Red LED On
Off
With fault storage
Reset-button
Red LED On
Off
The power supply to terminals A1 – A2 can be taken from the system being
monitored. However, in this case it is important to ensure compliance of the
voltage range with the technical specifications.
With a jumper LT1 – LT2: A fault signal is not stored; the device is
automatically released again if the insulation resistance improves.
Without a jumper LT1 – LT2: the fault signal is stored; pressing the RESET
button or an external key at the terminals LT1 – LT2 clears the fault signal.
Pressing the Test button or an external key at the terminals PT – PE simulates
a fault.
The measurement voltage to the terminals L+ and L- serves at the same time
as the power supply.
With a jumper LT – X1: A fault signal is not stored; the device is automatically
released again if the insulation resistance improves.
Without a jumper LT – X1: The fault signal is stored; pressing the RESET
button or an external key at the terminals LT – X1 clears the fault signal.
Pressing the Test button or an external key at the terminals PT – X1 simulates
a fault.
I201_11520b
N
L
242221141211
LT2LT1
A2A1
PE
LPEPT
L3
L2
L1
L+
L-
PT
L- PE
PE
LT X1 11 12 14 21 22 24
L+
I201_11521a
© Siemens AG 2016
33
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 insulation monitors for industrial applications
Front views
5TT3470 for three-phase and AC systems
Direct interference voltage
While direct interference voltages do not damage the devices
they often interfere with conditions in the measuring circuit. In a
system being monitored, only one insulation monitor should be
connected. This must be taken into account if gateways are
used.
System capacitances to protective ground C
E
do not corrupt the
insulation measurement because it is implemented with direct
current. However, the response time may be extended in the
event of an insulation fault, namely in the magnitude of the time
constant R
E
times C
E
.
The power supply to the insulation monitors can be taken from a
separate system or from the one being monitored. However, the
above mentioned power supply range must be taken into
account.
LEDs:
• Green LED lights up if power supply U
c
is applied
• Red LED lights up in the event of an insulation fault
5TT3471 for direct voltage systems
Leakage capacitance
The insulation monitor can be installed in systems with high
leakage capacitance to PE. In the case of high-resistance alarm
values, a transient alarm signal may occur when switching on
the system being monitored due to an existing ground leakage
capacitance.
The values of the capacitance C
E
given the following set values
of R are approximately:
• R = 200 kΩ: C
E
> 0.8 μF
• R = 50 kΩ: C
E
> 2.0 μF
• R = 20 kΩ: C
E
> 4.5 μF
In these applications, you should work without an alarm storage.
Due to the measuring function with bridge circuit, the insulation
monitor does not respond in the event of a simultaneous, exactly
symmetrical ground fault of L+ and L-. However, exactly
symmetrical ground faults are highly unlikely in practice.
LEDs:
• Green LED lights up if power supply U
c
is applied
• Red LED 1 lights up for insulation fault L+ to PE
• Red LED 2 lights up for insulation fault L- to PE
5TT3470 5TT3471
I201_11971
PE PT LT1 LT2
LA1A2
T1
T2
12 22
14 11 24 21
E1
LED green:
LED red:
E1:
T1:
T2:
Status display (ON)
Insulation fault (AL)
Alarm value adjuster (RAL)
Tes t
Reset
LED red
LED green
I201_11972
PE PX X1 LT
L+
T1
T2
12 22
14 11 24 21
L–
E1
LED 1 red
LED green
LED 2 red
LED green:
LED 1 red:
LED 2 red:
E1:
T1:
T2:
Status display (ON)
Insulation fault L– (RE–)
Insulation fault L+ (RE+)
Alarm value adjuster (RAL)
Tes t
Reset
© Siemens AG 2016
34 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
■
Overview
In areas that conform to Group 2 of DIN VDE 0100-710, any
interruption to the examination and/or treatment of patients
would place those patients at risk.
Limit monitoring
This is prevented through the use of changeover and monitoring
units. These monitor the insulation resistance of the non-
grounded IT system, the load current and the temperature of the
transformer. If the limit value is exceeded, the insulation monitor
gives out a warning signal.
Voltage monitoring
In addition, a special voltage relay monitors the voltage of the
power supply and switches to a second power supply if it falls
below the specified limit values.
■
Technical specifications
Switchover devices
7LQ3361 7LQ3362
Standards IEC 60364-7-710; DIN VDE 0100-710
Supply voltage U
v
V AC 230 230/400
Primary operating range × U
v
0.9 ... 1.1
Supply frequency f
v
Hz 50 … 60
Insulation coordination IEC 60664-1
Rated impulse withstand voltage kV 4
Pollution degree 3
Max. power loss P
v
W10.7
Power section
Contactors Mechanically latched; mechanically and electrically locked
Rated operational current acc. to DIN VDE 0100-710 A51 32
Rated operational current AC-3 A113 71
Short-circuit protection acc. to DIN VDE 0100-710
• Max. backup protection gG A 63
Switchover time s0.1 ... 10
Measuring circuit insulation monitoring
Response value R
an
kΩ50
Response deviation EN 61557-8
Response time t
an
at R
an
= 50 kΩ, C
e
= 1 μF R
F
from ∞ to 0.5 × R
an
s< 1.3
R
F
from ∞ to 0 kΩs< 0.7
Hysteresis %15
Measurement voltage U
m
V DC Approx. 15
Measurement current I
m max
(at R
F
= 0 Ω)µA < 50
Internal resistance DC R
i
kΩ> 250
Impedance Z
i
at 50 Hz kΩ> 250
Permissible direct interference voltage U
fg
V DC < 300
Test button External/internal
Measuring circuit load current monitoring
Response value,
adjustable with external transformer 50/5 A, Class 1
A5 … 50
Hysteresis %4
Temperature influence %/°C ≤ 0.05
Delay t
v
adjustable s0.1 ... 20
Measuring circuit, temperature monitoring
Response value kΩ3.2 ... 3.8
Release value kΩ1.5 ... 1.8
PTC thermistor Acc. to DIN 44081/44082 Unit(s) 1 … 6 in series
Measuring circuit, voltage monitoring
Response values ON-switching 2 % hysteresis 4 % hysteresis
OFF-switching × U
c
0.9 0.9
Phase failure detection At L1, L2 or L3 ms -- 100
N-conductor monitoring -- Yes
© Siemens AG 2016
35
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Switchover devices
7LQ3361 7LQ3362
Connection
Terminals
• Load circuit Feeder terminals mm² 4 ... 16
Output terminals
• Communication Status signals mm² 2.5
Fault indications
Environmental conditions
Permissible ambient temperature °C -20 ... 45
Mounting position Vertical
Insulation monitors
7LQ3354 7LQ3355
Standards EN 61557-8
Supply voltage U
v
V AC 230
Primary operating range × U
v
0.9 ... 1.1
Supply frequency f
v
Hz 50 … 60
Max. power loss P
v
VA Approx. 7
Rated line voltage U
n
(measuring circuit) V AC 0 … 300
Rated frequency f
n
Hz 10 … 1000
EMC immunity to interference IEC 61000-6-2
EMC emitted interference IEC 61000-6-3
Insulation coordination IEC 60664-1
Rated impulse withstand voltage kV 4
Pollution degree 3
Flammability class UL 94V-0
Measuring circuit insulation monitoring
Response value R
an
kΩ50 50 ... 500
Response deviation EN 61557-8
Response time t
an
at R
an
= 50 kΩ, C
e
= 1 μF R
F
from ∞ to 0.5 × R
an
s< 1.3
R
F
from ∞ to 0 kΩs< 0.7
Hysteresis %15
Measurement voltage U
m
V DC Approx. 15
Measurement current I
m max
(at R
F
= 0 Ω)µA < 50
Internal resistance DC R
i
kΩ> 250
Impedance Z
i
at 50 Hz kΩ> 250
Permissible direct interference voltage U
fg
V DC < 300
Measuring circuit load current monitoring
Response value,
adjustable with external transformer 50/5 A, Class 1
A5 … 50
Hysteresis %4
Temperature influence %/°C ≤ 0.05
Delay t
v
adjustable s0.1 ... 20
Measuring circuit, temperature monitoring
Response value kΩ3.2 ... 3.8
Release value kΩ1.5 ... 1.8
PTC thermistor Acc. to DIN 44081/44082 Unit(s) 1 … 6 in series
Display and control elements
Operating error Acc. to IEC 61557-8
LED display
• Current and temperature monitoring One red and one green LED
• Ready-to-run Green
• Insulation fault Red
• Line breakage monitoring of the isolation measuring circuit Red
• Display of current insulation resistance -- 11-step LED chain
Pushbuttons TEST and RESET
© Siemens AG 2016
36 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
Insulation monitors
7LQ3354 7LQ3355
Output relay
Contacts for Overtemperature 2 CO
Overload 2 CO
Insulation fault 2 CO
Mode of operation Working current
Contacts AC-15 NO contacts A AC/V AC 3/230
AC-15 NC contacts A AC/V AC 1/230
Electrical service life AC-15, 1 A, 230 V AC Switching
cycles 30000
Thermal current A AC 5
Connection
Terminals ± Screw (Pozidriv) 2
• Conductor cross-sections Rigid mm
2
2 × 2.5
• Insulation fault Flexible, with end sleeve mm
2
1 × 2.5
Environmental conditions
Permissible ambient temperature °C -20 … +60
Climatic withstand capability Acc. to EN 60068-1 20/060/04
Degree of protection Acc. to EN 60529 IP20, with connected conductors
Mounting position Any
Vibration stress Acc. to IEC 60068-2-6
• Amplitude mm 0.35
• Frequency Hz 10 … 55
Test and signaling panels
7LQ3356 7LQ3357
Standards DIN VDE 0100-710; IEC 60364-7-710
Rated voltage U
n
V AC/DC 24
Rated impulse withstand voltage Acc. to IEC 60664-1 kV 4
Volt ag e ra ng e AC 0.8 ... 1.1 x U
n
DC 0.9 ... 1.2 x U
n
Rated current per input mA 0.25
Rated consumption VA 6
Rated operating mode Continuous operation
Pollution degree Acc. to IEC 60664-1 2
Degree of protection
• Enclosure Acc. to IEC/EN 60529 IP40
• Terminals Acc. to IEC/EN 60529 IP20
Flammability class UL 94V-0
Vibration stress Acc. to IEC/EN 60068-2-6
• Amplitude mm 0.35
• Frequency Hz 10 … 55
Climatic withstand capability Acc. to IEC/EN 60068-1 20/045/04
Terminal marking EN 50005
Wire connections
• Solid mm
2
1 × 1.5
mm
2
2 × 0.5
•Strand mm
2
1 × 1
mm
2
2 × 0.2
• Strand with sleeve mm
2
1 × 0.5
Conductor mounting Box terminals with wire protection
Device dimensions mm 80 × 160 × 57 82 × 150 × 57
Temperature range °C -20 ... +45
© Siemens AG 2016
37
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Current transformers Class 1
7LQ3358
Standards IEC/EN 60044-1, VDE 0414-44-1
Rated operational voltage U
c
V AC 230
Rated frequency Hz 50/60
Test voltage 50 Hz, 1 min kV 3
Rated transformation ratio k
n
A50/5
Primary rated current A50
Secondary rated current A5
Rated power V/A 1.5
Class 1
Rated frequency Hz 50 ... 60
Highest voltage at equipment/insulation level kV 0.72/3
Overcurrent factor FS5
• Thermal rated short-time current × I
n
60
• Thermal rated continuous current × I
n
1.2
Expanded current range %120
Permissible ambient temperature °C -20 … +60
Test and signaling combination for insulation monitors
7LQ3360
Standards DIN VDE 0100-710; IEC 60364-7-710
Rated voltage U
n
V AC 24
Volt ag e ra ng e AC 0.8 ... 1.1 × U
n
Connected load W0.5
Rated operating mode Continuous operation
EMC
• Static discharge Acc. to IEC/EN 61000-4-2 kV 8 (air discharge)
• RF irradiation Acc. to IEC/EN 61000-4-3 V/m 10
• Rapid transients Acc. to IEC/EN 61000-4-4 kV 2
• Surge voltage (surge) Acc. to IEC/EN 61000-4-5 kV 1
Degree of protection IP30
Amplitude mm 0.35
Frequency Hz 10 ... 55
Temperature range °C -5 ... +55
Climatic withstand capability Acc. to IEC/EN 60068-1 05/055/04
Terminal marking EN 50005
Wire connections
• Solid mm
2
1 × 4
• Strand with sleeve and plastic collar mm
2
1 × 2.5
• Strand with sleeve and plastic collar DIN 46228-1/-2/-3/-4 mm
2
2 × 1.5
• Strand with sleeve DIN 46228-1/-2/-3 mm
2
2 × 2.5
Conductor mounting Box terminals with wire protection
Device dimensions mm 80 × 80 × 35
© Siemens AG 2016
38 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
1)
Tripping units must be ordered separately.
■
Accessories
SIRIUS 4AT isolating transformers
Further information about the SIRIUS 4AT isolating transformers
can be found in Catalog IC 10 · 2016.
Voltage relays
5TT3411 5TT3412
Rated operational voltage U
c
V AC 230 230/400
Overload capability × U
c
1.15 1.1
Rated frequency Hz 50/60
Response values ON-switching
OFF-switching × U
c
2 % hysteresis
0.9 4 % hysteresis
0.9
Minimum contact load V/mA 10/100
Phase failure detection At L1, L2 or L3 ms -- 100
N-conductor monitoring -- Yes
Rated insulation voltage U
i
Between coil/contact kV 4
Contacts AC-15 NO contacts
AC-15 NC contacts 3
23
1
Electrical service life in switching cycles AC-15, 1 A, 230 V AC 5 × 10
5
Rated impulse withstand voltage Acc. to IEC 60664-1 kV 4
Pollution degree 2
Terminals ± Screw (Pozidriv) 2
Conductor cross-sections
• Rigid
• Flexible, with end sleeve mm
2
mm
2
2 × 2.5
2 × 1.5
Permissible ambient temperature °C -20 … +60
Climatic withstand capability Acc. to EN 60068-1 20/060/04
IT line transformers
4AT3/4AT4
In the case of isolating transformers used to set up medical IT systems,
overcurrent protective devices are only permissible as protection against
short circuits. To protect the isolating transformers against overload they
are fitted with monitoring devices that signal an excessive rise in
temperature (e.g. 7LQ3354 insulation monitors).
Standards EN 61558-2-15
Safety class I
Static shield between primary and secondary winding With insulated connection
Thermistor transformer protection Warning in the event of thermal overload
1)
Insulation monitoring With center tap
Short-circuit voltage u
z
%≤ 3
No-load current i
0
%≤ 3
• Starting current (rush), max. x I
1N
8
Rated ambient temperature t
a
/thermal class 55 °C/H
© Siemens AG 2016
39
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
■
Characteristic curves
7LQ3354 and 7LQ3355 insulation monitors
The following diagrams show the function of the measuring
circuits of the temperature monitors (top left), the load current
monitors (bottom left) and the insulation monitors (right).
11-14
21-24
11-12
21-22
V
P1/P2
≥ 3,2 kΩ
R
U
t
t
≤ 1,8 kΩ
Over-
temperature/
sensor break
Power
failure
I201_13579
V
>
U
N
31/41 34/44
32/42
tt
t
v
>on
off
LED
red
on
off
LED
green
Hysteresis
I201_13580a
V
F
51-54
61-64
U
R
R
t
t
51-52
61-62
51-54
61-64
51-52
61-62
an
Break
Measuring circuit
Without fault storage
(jumper LT1-LT2)
With fault storage
(without jumper LT1-LT2)
LED “MK“ On
Off
LED “AL“
Reset
push-button LT
On
Off
LED “MK“ On
Off
LED “AL“ On
Off
Ground fault
I201_13581
© Siemens AG 2016
40 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
Test and signaling panels Test and signaling combination for insulation monitors
Voltage relays
The voltage relay switches at a phase asymmetry of approx. 6 %
to 8 %, regardless of the response values for undervoltage. The
above diagram also shows the timing interval.
7LQ3356, 7LQ3357
X1-L1
X2-L1
X3-L2
X4-L2
X5-
LED 1
LED 2
LED 3
LED 4
LED 5
LED 6
LED 7
LED 8
X11-
X8-
X6-
X7-
>
>
Line 1 OK
Line 1 failure
Line 2 OK
Line 2 failure
Test /
lation
Iso-
Over-
temperature
Overload
Output
Horn
Acknowledgement
lamp test
Dark Bright
SM
I201_13989
7LQ3360
X1/X2
U
UH
RE
t
t
ON
Ground fault
Horn
Green
LED
Yellow
LED
Acknow-
ledgement
pushbutton
Ron
I201_13990
5TT3411
L
L
b
a
N
.3 - .4
U
U
t
.1 - .2
Response
value
Hysteresis
I201_13574
5TT3412
L3
U
U
U
U
t
L2
L1
N
11 - 14
11 - 12
on
off
I201_13576a
© Siemens AG 2016
41
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
■
Dimensional drawings
Switchover devices
The 7LQ3361 and 7LQ3362 switchover devices are designed for mounting in series ALPHA 630 DIN floor-mounted distribution
boards and ALPHA AS side-by-side switchgear cabinets with a cabinet depth of at least 320 mm.
More information about the distribution boards can be found in Catalog LV 10.
Contact your local Siemens representative for information about additional versions.
7LQ3361
I201_17066
250 132
171
212
-X1 -X2
-X3
K1
K3 K4
K5
K20 S1
K6 K7
K9
K8
K10
T01
F1 F2 F3 K13
K2
76
225
376
470
585
728
840
900
© Siemens AG 2016
42 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
The 7LQ3361 and 7LQ3362 switchover devices are designed for mounting in series ALPHA 630 DIN floor-mounted distribution
boards and ALPHA AS side-by-side switchgear cabinets with a cabinet depth of at least 320 mm.
More information about the distribution boards can be found in Catalog LV 10.
Contact your local Siemens representative for information about additional versions.
Insulation monitors
7LQ3362
250 132
171
212
-X1 -X2
-X3
K1
K3 K4
K5
K20 S1
K6 K7
K9
K8
K10
T01
F1 F2 F3 K13
K2
76
I201_17067
225
376
470
585
728
840
900
7LQ3354 7LQ3355
140 55
43
45
90
P2P1 i k PE‘
L‘
PE
L
PT LT1 LT2A1
2124 3134 4144 54 51 64 61 X2 X514
22 32 42 52 62 X112
11
A2
A1 P1 P2 i k PE PT LT1 LT2
14 2411 21 34 31 44 41 54 51 64 61
PE‘ LL‘A2
52 6232 4212 22
105
I201_13807
© Siemens AG 2016
43
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Test and signaling panels
Current transformers Test and signaling combination for insulation monitors
Voltage relays
7LQ3356
80 57
160
I201_13985
7LQ3357
150
82 47
10
I201_13986
7LQ3358
10
78
46
27
6,5
60
40
20 30
I201_13810
7LQ3360
I201_14002
80
80
55
55
35
6
ON
TEST
5TT3411 5TT3412
L3L2L1 N
241114
23 31
3212
NLa
Lb
Y1 Y2 11 12
41 42
23 24
33 34
7272 55
43
45
90
I201_13712
© Siemens AG 2016
44 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
■
Circuit diagrams
Switchover devices
7LQ3361
7LQ3362
Circuit diagram of 7LQ3361 and 7LQ3362 switchover device to test signaling device (e.g. 7LQ3356 or 7LQ3357 test and signaling panels)
I201_17068
X1:7
L1 N L1 N
X1:8
L1
230 115 115 2N SCH P1 P20
N
X2:1 X2:2
L1
X2:4 X2:10 X2:11X2:S
N (MZ)L2
X1:PE X1:4 X1:5X1:1 X1:2
L1 L2
X2:5 X2:3X1:PE
Line 1
To IT transformer From IT transformer
IT system loadLine 2
I201_17069
400 400 400 230 230 230 2N SCH P1 P2
X1:9
L1 L2 L3 N
X1:10
L1 L2
X1:11
L3
X1:12
N
X2:1 X2:4
L1
X2:7 X2:10 X2:12 X2:13X2:S
N(STP)L2 L3
X1:3 X1:4 X1:PEX1:1 X1:2
L1 L2 L3 N
X1:7 X1:8 X1:PEX1:5 X1:6
L1 L2
X2:2 X2:6
L3
X2:8
Line 1
To IT transformer From IT transformer
IT system loadLine 2
I201_17070
X3:1 X3:2 X3:4 X3:5 X3:6 X3:7 X3:8 X3:9 X3:10 X3:11 X3:12 X3:13 X3:14 X3:15
Test button
ISO
Line 1
Operation
Line 1
Failure
Line 2
Operation
Line 2
Failure
Temperature
monitoring
Current
monitoring
ISO
monitoring
IT transformer
© Siemens AG 2016
45
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Insulation monitors
Test and signaling panels Test and signaling combination for insulation monitors
Voltage relays
Use L
a
and L
b
for monitoring 2 phases or 2-channel monitoring
of 1 phase. L
b
must be jumpered with L
a
if only L
a
is used.
Circuit diagram of 7LQ3361 and 7LQ3362 switchover device to the central building control system devices
I201_17071
X3:18
X3:16 X3:17
X3:19 X3:20 X3:21 X3:22 X3:23 X3:24 X3:25 X3:26 X3:27 X3:28 X3:29 X3:30
MCB
tripped
Line 1
Operation
Line 2
Operation
Line 1
Failure
Line 2
Failure
Temperature
monitoring
Current
monitoring
ISO
bad
ISO
good
Contactor
Line 1 not
switched off
Contactor
Line 2 not
switched off
IT transformer IT system
7LQ3354
7LQ3355
I201_13713b
11 14 12 21 24 22 31 34 32 41 44 42 51 54 52 61 64 62
LT1
LT2
iP2P1 PE
'
A2A1 PE PTLL
'
k
7LQ3354
Transformer protection Insulation monitors
11 14 12 21 24 22 31 34 32 41 44 42 51 54 52 61 64 62 X1 X2 X5
7LQ3355 LT1
LT2
iP2P1 PE
'
A2A1 PE PTLL
'
k
Transformer protection Insulation monitors
I201_13811b
7LQ3356, 7LQ3357
12345678
X5 X4 X3 X2 X1A1 A 2 SM PT2 PT1 X8 X7 X6
PT
QH/LT
+
I201_13987
7LQ3360
PT1PT2X1X2X5
Test
Ack.
ON
Ground fault
I201_13988
5TT3411 5TT3412
N
L
b
Y1 Y2
L
a
11
12
23
24
33
34
41
42
I201_13714a
L1L2
N
L3112331
14 122432
© Siemens AG 2016
46 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
■
More information
Connection examples
Switchover devices
Insulation monitors
7LQ3361, 7LQ3362
I202_01367a
Test button
Line 1
Operation
Line 1
Failure
Line 2
Operation
Line 2
Failure
Insulation
OK
Insulation
Fault
Transformer
Temperature
Transformer
Overload
Acknowledgment
key external
Output
Group message
Terminal block X3
Test button
ISO Operation Failure Operation Failure
Temperature
monitoring
Current
monitoring
ISO
monitoring
LINE 1 LINE 2 IT transformer
X5
X4
X3
X2
X1 A1 A2 SM
PT2PT1 X8X7
X6
7LQ3356 / 7LQ3357
L (L+)
N (L-)
X3:1 X3:2 X3:4 X3:5 X3:6 X3:7 X3:8 X3:9 X3:10 X3:11 X3:12 X3:13 X3:14 X3:15
7LQ3361 / 7LQ3362
7LQ3354
I201_17057a
11 14 12 21 24 22 31 34 32 41 44 42 51 54 52 61 64 62
P1 P2 i k LPEPT
A1 A2
PE PE
NL2
LL1
>>
L'PE '
1)
7LQ3360
X1 X2 X5 PT1 PT2
Isolating transformer
3.15 ... 8 kVA
Current transformer
Transformer protection
Overtemperature Overcurrent
Insulation monitor
230 V AC
24 V AC Test and
signaling combination
2)
1) If there is no center tap,
L/L' is connected to L1 or L2.
2) The 24 V AC power supply unit needs to be powered
over the IT system.
7LQ3358
7LQ3354
© Siemens AG 2016
47
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Insulation monitors
Test and signaling panels
7LQ3355
Up to four 7LQ3360, 7XV9306, 7XV9304 or 7XV9302 test and signaling combinations can be connected; cf. connection example and comparison of contact
assignment between previous and current test and signaling combinations
3,15 … 8 kVA
11 21 31 41 51 6114 24 34 44 54 6412 22 32 42 52 62
P1
LT 1
LT 2
P2 i k LPEPT
A1 A2
PE
PE
N
L2
230 V AC
L
1)
L1
7LQ3355
> >
L
'PE
'
7LQ3360
X1 X2 X5
X1 X2 X5 PT1 PT2
PE PT
Overtemperature Overcurrent
Transformer
protection
Current transfor.
Reset
External
External test
Insulation monitor
R<
FAL
R/
Measuring circuit break
Insulation fault
Jumpers =
non-latching
Isolating transformer
1) If there is no center tap, L/L' is connected to L1 or L2.
Test and
signaling combination
7LQ3358
I201_13994a
X1 ... X7 Fault signaling inputs
X8 Acknowledgement horn/lamp test
SM Central indication output
PT1, PT2 Test button for insulation monitors
7LQ3356, 7LQ3357
X1
PT1
PT2
PT PE
X2 X3 X4 X5 X6 X7 X8 SM A1
A2
L(L+)
N(L-)
1234 6578
externo
QH / LT
7LQ3354 / 7LQ3355
7LQ3356 /7LQ3357
11 14 31 34 51 54
OK
Failure
OK
Failure
Line 2Line 1
Voltage monitoring
I201_13991a
© Siemens AG 2016
48 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
Connection example for 7LQ3355 insulation monitors with 7XV9306 test and signaling combination
Up to four test and signaling combinations (e.g. the 7LQ3360
test and signaling combination and the previous 7XV9306,
7XV9304 or 7XV9302 test and signaling combinations (now no
longer available) can be connected.
An external 24 V AC (e.g. 4AC3616) transformer is required to
power the test and signaling combination.
7LQ3355
11 14 12 21 24 22 31 34 32 41 44 42 51 54 52 61 64 62
PT 52 51 PE
X1 X2 X5
P1
LT 1
LT 2
P2 i k LPEPT
A1 A2
PE
PE
N
L2
L
L1
L'PE '
1)
4
5
2
3
6
18
A2A1 15
4
5
2
3
6
4
5
2
3
6
4
5
2
3
6
B1
2)
RF<R
1) If there is no center tap, L/L' is connected to L1 or L2.
2) The 24 V AC power supply unit needs to be powered over the IT system.
230 V AC
>>
Isolating transformer
3.15 ... 8 kVA
Current transformer
Transformer protection
Overtemperature Overcurrent on
/ measuring circuit interruption
Insulation fault
Insulation monitor
External test
Reset
External
Jumper =
non-latching
24 V AC
I201_13812d
7LQ3358
7LQ
5TT
7XV9306
7XV9306
7XV9306
7XV9306
© Siemens AG 2016
49
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Comparison between the contact assignment for the previous, no longer available test and signaling combinations 7XV9306, 7XV9304 and 7XV9302
and the contact assignment for the current 7LQ3360 test and signaling combination.
Monitoring of medical premises
Medical premises are all rooms used for the examination or
treatment of persons or animals. Besides doctors' surgeries and
clinics, these also include hydro-therapeutic and physical
therapeutic treatment and massage rooms.
TÜV-certified switchover and monitoring devices are used for a
reliable power supply. The insulation monitors and voltage relays
in the switchover and monitoring devices need to comply with
the requirements of standard DIN VDE 0100-710 and
IEC 60364-7-710.
Medical premises were divided up into three groups in
DIN VDE 0100-710, which was published in 2002.
For premises in groups 0 and 1, the standard requires, among
other things, implementation of the system type TN-S and
residual current protective devices (RCDs) for protection against
excessively high touch voltages.
The premises of group 2 are defined as follows:
• The system must not be disconnected in the event of a first
short circuit to frame or to ground or if the general power
supply fails
• Repetition of treatment is unacceptable for patients or it is
impossible to obtain results of examinations again
• An irregularity (a fault) in the power supply can cause danger
to life
• A piece of equipment used for medical purposes, which is
used occasionally for applications in accordance with
DIN VDE 0100-710.2.7, should be assigned to group 2
Typical locations in group 2 are anesthetic rooms, operating
rooms and recovery rooms in hospitals, clinics or doctors'
surgeries, as well as equipment used in veterinary medicine.
Standard DIN VDE 0100-710 makes the following stipulations:
• Constant monitoring of the power supply on the preferred
supply line and on the second supply line
• Automatic changeover to the 2nd supply line within a defined
time (< 0.5 s or < 15 s)
• Reliable operation even if a fault occurs
(one-fault security)
The switchover device monitors the supply voltage on the
preferred and second supply line for undervoltage and power
failure. As soon as a voltage drop to a defined value is
determined, the voltage relays respond and the switchover
device automatically switches to the second supply line. As
soon as the power is restored on the preferred supply line, the
system switches back to it.
IT system
In the IT system name, the first letter describes the grounding
relationships of the current source. I stands for insulation of all
live parts from ground or connection of a point to ground via an
impedance. The second letter identifies the grounding
relationships of the body of the electrical system.
T means that the body is directly grounded, independently of
any existing grounding of a point of the power source.
Medical IT systems
Standard DIN VDE 0100-710 makes the following stipulations for
a medical IT system in group 2:
• The medical IT system must be used for socket outlet circuits
in the patient environment. This also applies for circuits
supplying operating room lights
• At least one IT system is required for each room group
• Separate circuits must be provided for multiple socket outlets
• First faults must not lead to disconnection of the system
The IT system is powered by an isolating transformer or an
independent power source (such as a battery). The special
feature is that no active conductors in this network are linked
directly to ground. This has the advantage that only a small
residual current can flow in the event of an insulation fault. This
is essentially dictated by the leakage capacitances and is
harmless to patients and staff. The upstream fuse element does
not respond so that the power supply, and therefore operation,
is maintained, even in the event of a phase-to-ground fault. The
high reliability of an IT system is ensured by continuous
insulation monitoring. The insulation monitor detects insulation
faults as they develop and signals in good time if a value falls
below a limit value, before any further insulation faults can lead
to an unexpected shutdown. The temperature of the transformer
and the transformer load continue to be monitored constantly.
Any exceeding of limit values is signaled immediately.
31
32
33
34
35
7XV93027XV93047XV9306
1
23
3
4
5
2
4
5
6
X5
PT1
PT2
X2
X1
7LQ3360
Tes t
24 V AC
Fault input
I201 13813c
I201_12110
L2
L3
L1
Body
IT system
PE
© Siemens AG 2016
50 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
Insulation monitoring
The 7LQ3354 and 7LQ3355 insulation monitors are used to
monitor the insulation resistance of non-grounded IT systems in
medical premises. They also simultaneously monitor the load
current and the temperature of the IT isolating transformer. The
devices can monitor both three-phase and AC systems.
Temperature measurement: The temperature in the transformer
winding is recorded using a PTC thermistor or NC contacts.
As well as an adjustable response value of 50 ... 500 kΩ, the
7LQ3355 insulation monitor also has an 11-step LED chain for
displaying the current insulation resistance of the system.
A range of differently colored LEDs indicates the insulation
resistance within the range of 20 kΩ … 1 MΩ. This allows
insulation deteriorations to be detected even before an alarm is
triggered. The device is also equipped with an additional relay
for connection of a test and signaling combination. This allows
the 7LQ3360 test and signaling combination and the previous
and no longer available test and signaling combinations
7XV9306, 7XV9304 and 7XV9302 to be connected to the
7LQ3355 insulation monitor (see also the graphic under
"Connection example: 7LQ3355 insulation monitors with
7XV9306 test and signaling combination").
Load current sensing: The 7LQ3358 current transformer detects
the load current of a phase. Evaluation is carried out over the
7LQ3354 and 7LQ3355 insulation monitors.
Evaluation: If one of the values is outside the limit values, an
alarm is triggered. The LED for the relevant fault lights up and the
alarm relay switches. The information is made available over the
changeover contacts and can be displayed on the 7LQ3356 and
7LQ3357 test and signaling panels.
Voltage monitoring
In the case of undervoltage, there is no guarantee that medical
equipment will continue to function. Because of the risk this
presents to patients, e.g. during operations, it is essential that a
switchover unit switches to a second power supply in the event
of an undervoltage in the preferred power supply.
The voltage relays switch when the voltage falls below 90 %
of the rated voltage. The 5TT3411 relays serve to monitor a
1-phase infeed. 3-phase infeeds can be monitored using
5TT3412 relays. These relays also offer asymmetry, reverse
voltage and phase failure detection.
TÜV-certified switchover device
The 7LQ3361 and 7LQ3362 switchover devices have been
tested and certified by TÜV Rhineland. Switchover devices
comply with DIN VDE 0100-710:2002-11 and
IEC 60364-7-710:2002-11.
Rhineland TÜV certificate for 7LQ3361 and 7LQ3362 switchover devices
© Siemens AG 2016
51
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Components and control elements in 7LQ3361 and 7LQ3362 switchover devices
Control elements for insulation monitors
I201_17073
1
4
5
6
7
2
3
8
Meaning
1Terminal block X1
2Terminal block X2
3Terminal block X3
4Mechanical latching
5Miniature circuit breakers
6Voltage relay test pushbuttons
7Insulation monitors
8Temperature monitoring test pushbuttons
7LQ3354
7LQ3355
A1 P1 P2 i k PE PT LT1 LT2
14 2411 21 34 31 44 41 54 51 64 61
PE‘ LL‘A2
52 6232 4212 2 2
1 2 3 54
7
6
8
9
11
10
I201_13716
P2P1 i k PE‘
L‘
PE
L
PT LT1 LT2A1
2124 3134 4144 54 51 64 61 X2 X514
22 32 42 52 62 X112
11
A2
1 2 3 545a
7
6
8
9
11
9a
10
I201_13814
LED Meaning
1Current monitoring
(green) Lights up if the current is correct
(Go state)
2Current monitoring
">I" (red) Lights up in the case of overcurrent
3Insulation monitoring "ON"
(green) Lights up when the power supply is
switched on (ready-to-run)
4Insulation monitoring "MK"
(red) Lights up if a line of the measuring circuit
is interrupted (L, L’, PE, PE’)
5Insulation monitoring "AL"
(red) Lights up in the case of an insulation fault,
R
F
<R
an
(value has fallen below the
response value)
5a Insulation monitoring "R
F
"
(red, yellow, green) 11-step LED chain to display the current
resistance
6Temperature monitoring
(green) Lights up when the power supply is
switched on
7Temperature monitoring
(red) Lights up in the event of overtemperature
or an interruption in the sensor circuit
Pushbutton/rotary
controller
Meaning
8Rotary controller
response value ">I"Setting of the response value for current
monitoring
9Rotary controller
delay time Setting of delay time after which the CO
contacts return to their normal position if
the current value exceeds the set
response value.
9a Rotary controller response
value "R
an
kΩ"Setting of the response value for
insulation monitoring
10 "TEST" pushbutton Pressing the "Test" test button simulates
an insulation deterioration in the
measuring circuit (R
F
approx. 40 kΩ),
thus checking that the insulation monitor
is fully functional
11 "RESET" button Deletion of fault if fault storage is
activated
© Siemens AG 2016
52 Siemens · 10/2015
7LQ3 monitors for medical premises
Monitoring Devices
Monitoring Devices for Electrical Values
Control elements of the test and signaling panels
Note:
Customized reporting and signaling panels can be produced,
for instance with an integrated intercom, for the switchover and
monitoring devices. For more information on this contact your
local Siemens representative.
Control elements of the test and signaling combination
Control elements of voltage relay
7LQ3356, 7LQ3357
I201_13995
>
7LQ3 356
line 1
on
line 1
failure
insulation
ok
test
line 2
failure
line 2
on
LED window displays Meaning
Line 1 On Power supply is implemented over the
preferred infeed
Line 2 On
+ Line 1 Failure Power supply is implemented over the
second line as the preferred infeed has
failed
Line 1 On
+ Line 2 Failure Power supply is implemented over the
preferred infeed. However the second
line is no longer available
Line 2 On
+ Line 1 Failure
+ Line 2 Failure
Power supply is implemented over the
second line as the preferred infeed is
faulty. There is undervoltage on the
second line
Overload Excessive power consumption of the
IT system
Overtemperature The transformer of the IT system is
overloaded
Insulation is good The transformer of the IT system is
overloaded
Insulation is defective The insulation resistance of the IT system
is too low
TEST Pushbutton for testing the insulation
monitoring devices
Acknowledgement
pushbutton/lamp test Pushbutton for acknowledging the
acoustic alarm signal/function test of the
display elements
7LQ3360
I201_13996
ON
TEST
LED/pushbutton Meaning
ON Green LED The LED lights up if the power supply is
applied
Ground
fault
Yellow LED Insulation fault: The insulation resistance
of the IT system is too low
TEST Pushbutton for testing the insulation
monitoring devices
Acknowledgement
pushbutton Button for acknowledging the acoustic
alarm signal
5TT3411 5TT3412
NLa
Lb
Y1 Y2 11 12
41 42
23 24
33 34
1
2
L3L2L1 N
241114
23 31
3212
1
2
2
2
I201_13720
LED/pushbutton Meaning
15TT3411: Yellow LED
5TT3412: Green LED The LED lights up if the system is
fault-free
2TEST button Pressing the test button simulates an
undervoltage. The
3-phase 5TT3412 voltage relay has a
test button for each phase.
© Siemens AG 2016
53
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 fault signaling units
■
Overview
Fault signaling units are used in small plants where the
installation of complex fault signaling systems would be too
labor-intensive and too expensive. In the event of a fault, they
enable fast fault localization of all monitoring devices and limit
monitors installed in a plant from a central location. This
increases plant availability. With the correct sensor
configuration, they also provide the option of preventative
maintenance.
• 4 fault signaling inputs with LED
• 1 LED as centralized fault indicator
• One unit each for centralized fault indication and acoustic
signaling
• With acknowledgment for acoustic indicators
• Open/closed-circuit principle so the 4 inputs can be adjusted
via jumpers X1 - X2
• A maximum of 39 5TT3461 expansion fault signaling units can
be connected to the 5TT3460 centralized fault signaling unit
• The maximum possible cable length between 5TT3460
centralized fault signaling units and 5TT3461 expansion fault
signaling units is approx. 100 m with a conductor cross-
section of 1.5 mm
2
■
Technical specifications
■
Dimensional drawings
■
Circuit diagrams
Graphical symbols
5TT3460 5TT3461
Standards IEC 60255; DIN VDE 0435-110, -303
Rated operational voltage U
c
V AC 230
Primary operating range × U
c
0.8 ... 1.1
Rated frequency f
n
Hz 50/60
Fault signaling inputs S1 ... S4 V AC 230
Signal voltage
To terminals S and H
V7 ... 10
Noise pulse duration ms ≥ 100
Acknowledgment pulse duration ms ≥ 200
Contacts
• Rated operational voltage U
e
V AC 230 --
• Rated operational current I
e
A 5 --
• Minimum contact load V; mA 10; 100 --
Connections
• Terminals ± Screw (Pozidriv) PZ 1
• Conductor cross-sections
-Rigid, max. mm
2
2 × 2.5
- Flexible, with end sleeve, min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +60
Humidity class Acc. to IEC 60068-2-30 F
5TT3460 5TT3461
54364
45
90
I201_11511a
36 36
A1 SH
S1 S2 S3 S4
A1 S H
S1 S2 S3 S4
14 24 QH A2
13 23 X1 X2
A2
X1 X2
5TT3460 5TT3461
24
23
14
13
I201_00154
QHHSX2X1
S4S3S2A1 A2 S1
I201_00155
HSX2X1
S4S3S2A1 A2 S1
© Siemens AG 2016
54 Siemens · 10/2015
5TT3 fault signaling units
Monitoring Devices
Monitoring Devices for Plants and Equipment
Typical circuit, function chart
If there is a fault, the SM fault indication contact closes and a
centralized fault is indicated over an LED. The assigned LED
remains lit until the fault is eliminated. Until the acknowledgment,
momentary faults can be identified by the remaining centralized
fault.
The terminals A1, S1 to S4 and QH must be operated in-phase.
If no external acknowledgment key is connected, terminal QH
must be applied to L1.
If jumper X1 – X2 is inserted, open-circuit protection (otherwise
closed-circuit protection).
Contacts 13/14 and 23/24 close in the event of an incoming fault.
The assigned LED and the SM centralized fault indication LED
light up.
The alarm sensor (contact 13/14) is switched off using the
acknowledgment key. The assigned LED and the centralized
fault indication LED continue to light up and contact 23/24
remains closed until the fault is eliminated.
Cables S and H carry an extra-low voltage. In the case of long
connections between different distribution boards a shielded
cable must be laid parallel to the installed load lines.
As a light signal sensor for the group messages we recommend
devices 5TE57 or 5TE58; as an alarm sensor the devices
5TT3450 to 5TT3453.
A1 A2
N
13 23 S1 S2 S3 S4 A1 A2 S1 S2 S3 S4
X1 X2 S HX1 X2 S H
QH
SM
14 24
5TT3460 5TT3461
I201_07282d
L1 230 V AC
(Working current) (Closed-circuit
current)
Acknow-
ledgement
key
Fault
alarm
FA
I201_07283c
Fault 1
LED 1
Fault 2
LED 2
Central indication
relay
Central indication
horn
A
cknowledge.
horn
dark bright
LED SM
© Siemens AG 2016
55
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT5 EMERGENCY STOP modules
■
Overview
EMERGENCY STOP circuits are common safety measures in all
laboratory equipment and industrial plants. The EMERGENCY
STOP modules used here must meet the most rigorous demands
with regard to functional reliability. Benchmark is the degree of
self-monitoring.
■
Technical specifications
■
Dimensional drawings
5TT5200 EMERGENCY STOP module
5TT5200
Standards IEC 60204-1; EN 60204-1 (VDE 0113-1)
Supply
• Rated operational voltage U
c
V AC 230
- Primary operating range × U
c
0.8 ... 1.1
• Rated frequency f
n
Hz 50
• Rated power loss P
v
Coil/drive 3.5
Contact per pole VA 0.8
Control voltage Terminal Y1 V AC/DC 24
Control current Terminal Y1 mA DC 45
Recovery time ms 500
Safety
• Electrical isolation, creepage distances and clearances, actuator/contact mm 3
• Rated impulse withstand voltage U
imp
actuator/contact kV > 4
Contacts
• Contacts NO contacts AC-15 A 3
NC contacts AC-15 A 2
NO contact/NC
contact AC-1 A 5
• Contact gap mm > 1
• Electrical service life AC-15, 2 A, 230 V AC Switching
cycles 10
5
• Permissible switching frequency Switching
cycles/h 600
Vibration resistance
Amplitude Acc. to
EN 60068-2-610 Up to
55 Hz mm 0.35
Connections
• Terminals ± Screw (Pozidriv) PZ 1
• Conductor cross-sections of main current paths
- Rigid Max. mm
2
2 × 2.5
- Flexible, with end sleeve Min. mm
2
1 × 0.5
Permissible ambient temperature °C 0 ... +50
Climatic withstand capability Acc. to EN 60068-1 0/55/04
43
55
45
90
5
71
33
A2
13Y1
16
Y2
23 41
3414 24 42
K1/2
A1
I201_08437a
A1
Supply
© Siemens AG 2016
56 Siemens · 10/2015
5TT5 EMERGENCY STOP modules
Monitoring Devices
Monitoring Devices for Plants and Equipment
■
Circuit diagrams
Typical circuit diagrams
Direct connection 230 V/400 V to 5 A
The monitoring logic checks internal relay contacts (not shown)
to see whether both relays have been released prior to switching
on. This ensures that no contacts are welded. The voltage level
at terminal A1 is also monitored. The parallel NC contacts K1
and K2 (terminals 41 and 42) can be connected as required.
Connection of external contactors
External contactors may be used when they are equipped with
positively driven contacts according to safety regulations
ZH1/457 of the German Trade Association. Contactors with
3 NO contacts and 1 NC contact must be used, in which case
the NC contacts must be integrated in the monitoring loop –
terminals Y1/Y2. The parallel NC contacts K1 and K2 (terminals
41 and 42) can be connected as required.
L1
A1 Y1 13 23 33 41
14 24 34 42
K2
K1
A2
N
I201_08435b
Y2
EMERGENCY-
STOP
Monitoring
logic
On
L1
A1 Y1 13 23 33 41
14 24 34 42
K2
K1
A2
I201_08436b
K3
K4
Y2
K4
K3
L1 L2 L3
NN
EMERGENCY-
STOP
Monitoring
logic
On
© Siemens AG 2016
57
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 level relays
■
Overview
Level relays are used for the monitoring and control of con-
ductive, non-combustible liquids and powders. They ensure
overflow and dry run protection. Due to their sensor perfor-
mance, the devices can also be used for general resistance
monitoring.
LED displays:
- Green LED: lights up when operational voltage is applied
- Yellow LED: lights up if MIN output relay is activated
- Red LED: lights up if MAX output relay is activated
■
Technical specifications
■
Dimensional drawings
5TT3435 level relays 5TG8223 immersion electrodes
5TT3435
Standards IEC 60255; DIN VDE 0435-110
Supply
• Rated operational voltage U
c
V AC 230
- Primary operating range × U
c
0.8 ... 1.1
• Rated frequency f
n
Hz 50/60
Setting range of the liquid level kΩ2 ... 450
Switching point hysteresis of set value
• At 450 kΩ% 3
•At 2 kΩ%6
Voltage temperature influence From set value % < 2
Max. cable length to the Setting kΩ
electrodes at 100 μF/km 450 m 50
100 m 200
35 m 500
10 m 1500
5m
3000
Electrode voltage Max. V AC Approx. 10
Electrode current Max. mA AC Approx. 1.5
Response delay Adjustable s 0.2 ... 20
OFF-delay Adjustable s 0.2 ... 20
Rated operational voltage U
e
V250
Rated operational current I
e
A 5
Test voltage Input/auxiliary circuit kV 4
Input/output circuit kV 4
Auxiliary/output circuit kV 4
Connections
• Terminals ± Screw (Pozidriv) PZ 2
• Conductor cross-sections
- Rigid Max. mm
2
2 × 2.5
- Flexible, with end sleeve Min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +60
Climatic withstand capability Acc. to EN 60068-1 20/60/4
5TT3435
36 543
64
45
90
I201_13760
COM
X1 X2
MINMAXA1 A2
12 22
14 11 24 21
5TG8223
79
140
13
5
Ø16
21
5
I201_12435
© Siemens AG 2016
58 Siemens · 10/2015
5TT3 level relays
Monitoring Devices
Monitoring Devices for Plants and Equipment
■
Circuit diagrams
Graphical symbols
Typical circuit for 5TT3435
One-step level control
Two-step level control
X1
MIN MAX COM
X2 A1 A2 14
11 21
12 24 22
The one-step level control is
particularly suitable for dry run or
overrun protection with free
inflow/outflow.
The COM reference electrode and
MAX electrode are needed.
Without the jumper X1-COM only
relay 21-22-24 switches.
With the jumper X1-COM both
relays switch together.
21-24
21-22
21-24
21-22
COM X2
COM X2
MAX
0
11-14/21-24
11-12/21-22
t
11-14/21-24
11-12/21-22
COM X2
COM X2
tt
X1
X1
X1
X1
COM X2
COM X2
I201_07520d
Supply
Level
Static current
Load current
L1 N
A1 A2
14
11
12
24
21
22
COM MIN MAX X2
MIN
MAX
X1
I201_07518b
230 V AC
Level
t = t
v max
adjustable from 0.2 s to 20 s
The 2-step level control keeps the
liquid level between a minimum
and a maximum level. Three
electrodes are required: MIN, MAX
and COM.
Without the jumper X1-COM,
switching is as follows:
• If the MAX level is fallen
below/exceeded, only relay
21–22–24 switches.
• If the MIN level is fallen
below/exceeded, only relay
11–12–14 switches.
With the jumper X1–COM, both
relays switch together if the value
exceeds the MAX level or falls
below the MIN level.
L1 N
A1 A2
14
11
12
24
21
22
COM MAXMIN X2
MIN
MAX
X1
I201_07519b
Level
230 V AC
21-24
21-22
11-14
11-12
COM X2
MAX
U
0
MIN
H
1
2
X1
21-24
21-22
11-14
11-12
COM X2
min
X1
11-14, 21-24
11-12, 21-22
max
COM X2X1
11-14, 21-24
11-12, 21-22
COM X2X1
COM X2
COM X2
I201_07521d
tv
tv
min
tv
maxtv
Level
Static current
Load current
t
v max
and t
v min
adjustable from 0.2 s to 20 s
© Siemens AG 2016
59
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 line circuit relays
■
Overview
Line circuit relays are used to interrupt circuits and prevent
electromagnetic fields in circuits where there are currently no
active loads.
If the loads are disconnected, and the line circuit relay measures
a usage of only 2 to 20 VA – adjustable – it disconnects the cable
to the supply voltage and switches over to extra-low voltage. As
soon as loads are reconnected, the line circuit relay detects the
increase in usage and switches back to the supply voltage.
While the line circuit relay switches off any unnecessary system
components, it is not a device for ensuring isolation in the sense
of safe disconnection.
The line circuit relay is unable to detect consumers with
electronic power supply units, e.g. electronically controlled
vacuum cleaners. It is expedient to connect such devices to a
base load resistor (PTC resistor) so that the line circuit relay is
reset to supply voltage.
■
Technical specifications
■
Dimensional drawings
■
Circuit diagrams
Typical circuit diagram If the line circuit relay does not respond to a load, it must be
connected with a 5TG8222 base load resistor. Devices in active
standby operation may impair the function of the line circuit
relay.
5TT3171
Standards IEC 60255; DIN VDE 0435-110
Rated operational voltage U
c
V AC 230
Primary operating range × U
c
0.85 ... 1.15
Rated frequency Hz 50/60
Rated power loss P
v
Electronics VA 5
Contacts VA 2.6
Monitoring voltage V3
Response value Adjustable VA 2 ... 20
Release value % of the response value 70
Rated impulse withstand voltage U
imp
Input/output kV > 4
Rated operational voltage U
e
V AC 250
Rated operational current I
e
AC-1 A 16
AC-11 A 3
Contacts μ contact
Electrical service life In switching cycles at 3 A AC-11 5 × 10
5
Terminals ± Screw (Pozidriv) PZ 1
Conductor cross-sections
• Rigid Max. mm
2
2 × 2.5
• Flexible, with end sleeve Min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +45
Degree of protection Acc. to IEC/EN 60529 IP20, with connected conductors
Safety class Acc. to EN 61140/VDE 0140-1 II
Humidity class Acc. to IEC 60068-2-30 F
5TT3171
L N
543
64
18
I201_10775a
45
90
LN
L1
N
PTC
i
I201_07036b
230 V AC
Elec-
tronic
© Siemens AG 2016
60 Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Plants and Equipment
■
Overview
The p.f. monitor monitors the phase displacement between
current and voltage. Because the phase displacement angle
changes with the load of the motor, this measurement method is
ideal for the monitoring of asynchronous motors for underload
and no-load operation, independent of size. However, in some
cases, the p.f. barely changes if the load of the motor changes,
e.g. in the case of relatively minor load changes on large-scale
motors or single-phase split-pole motors or collector motors.
The p.f. monitor monitors single and three-phase asynchronous
motors up to approx. 5 A (without current transformer) for
underload and no-load operation, thus increasing plant
availability. Typical applications are fan monitoring in the case of
V-belt breakage, pump monitoring in the event of valve closure
or dry runs. A current transformer is used for higher rated
currents.
If the lower p.f. value set at the p.f. monitor is violated for the
duration of the set response delay, the output relay switches to
the alarm state and the red LED lights up. If the higher p.f. value
is violated, the output relay switches back without any significant
delay.
• Adjustable p.f. response value, from 0 to 0.97
• Current range up to 8 A
• LED display for operation and alarm
• Automatic resetting of alarm
■
Technical specifications
■
Dimensional drawings
5TT3472
5TT3472
Standards IEC/EN 60255, VDE 0435
Rated operational voltage U
c
3 V AC 400
Primary operating range With AC supply × U
c
0.8 ... 1.1
Frequency range f
n
Hz 45 ... 65
Rated power loss P
v
VA Approx. 11
Rated impulse withstand voltage U
imp
Against contacts kV < 4
Current measuring circuits For AC systems
Current measuring range I
meas
A AC 0.4 ... 8
Short-time load carrying capacity For 2 s A 20
For 0.5 s A 40
Current transformer, class 3 or better Secondary current A 1 or 5
Setting range Adjustable p.f. 0 ... 0.97
Response delay Adjustable s 1 ... 100
Short-circuit strength Fuse 4 A gL A 4
Contacts μ contact 1 CO
• Rated operational voltage U
e
V AC 250
• Rated operational current I
e
Thermal current A 4
AC-15 NO contacts A 3
AC-15 NC contacts A 1
AC-13 at 24 V DC A 1
• Minimum contact load V; mA 10; 100
Connections
• Terminals ± Screw (Pozidriv) PZ 2
• Conductor cross-sections
- Rigid Max. mm
2
2 × 2.5
- Flexible, with end sleeve Min. mm
2
1 × 0.5
Permissible ambient temperature °C -20 ... +60
Resistance to climate Acc. to EN 60068-1 20/60/4
Degree of protection Acc. to EN 60529 IP20, with connected conductors
L3
L1
12
141
18 543
45
90
I201_11528b
1
L2
64
L1'
5TT3 p.f. monitors
© Siemens AG 2016
61
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Plants and Equipment
■
Circuit diagrams
■
More information
Function charts
If the lower p.f. value set at the p.f. monitor is violated for the duration of
the set response delay, the output relay switches to the alarm state and
the red LED lights up. Contact 11–14 closes and the red LED lights up.
Front view
Connection of three-phase load Connection of single-phase load
Connection of motors with separate windings
Connection of three-phase load
with external current transformer,
whereby the winding direction of
the current transformer must be
taken into account.
L1
11 12 14
L1' L2 L3
L1
M
3
L2
L3
I201_11524b
L1
11 12 14
L2 L3
L
N
I201_11525b
L1'
Load
L1
11 12 14
L1' L2 L3
L1
M
3
L2
L3
Kk
lL
Kk
lL
1W1
1V1
1U1
2W1
2V1
2U1
I201_11527b
Low
Speed
High
Speed
L1
11 12 14
L1' L2 L3
L1
M
3
L2
L3
KL
kl
I201_11526b
Trip
p.f.
I201_11523b
11-14
11-12
ty
U(L1/L2/L3)
I(L1/L2)
L3 L2
11
L1 L1'
14
I201_11973a
12
E1
E2
LED red
LED green
Underloading indicator (p.f. alarm)
LED red:
Response value
E1:
Response delay ty
E2:
LED green: Status display (U)
5TT3 p.f. monitors
© Siemens AG 2016
62 Siemens · 10/2015
5TT3 motor protection relays
Monitoring Devices
Monitoring Devices for Plants and Equipment
■
Overview
Thermistor motor protection relays monitor the thermistors
wound in motors. This helps to prevent thermal motor overloads,
e.g. due to high switching frequency, single-phasing, disabled
cooling or excessive ambient temperatures. Up to 6 thermistors
in series can be monitored. A conductor break in the sensor
conductor will immediately trip the device. The device can also
be used for monitoring wound quick-break switches – e.g.
bimetal thermostats. This offers all-round motor protection.
• For the detection of
- Violation of upper temperature limits
- Wire breaks in sensor circuits
• 1 input for 1 to 6 thermistors
• With 2 LEDs green/red for ready-to-run and fault
• Response value: 3.2 to 3.8 kΩ
• Release value: 1.5 to 1.8 kΩ
• The max. cable length of the sensor supply cable NYM 2 × 1.5
is 100 m
• Remote Reset: over A1/A2 (NC contact) or over X1/X2
(NO contact)
LED displays:
• Green LED: Lights up when operational voltage is applied
• Red LED: Lights up in the event of overtemperatures or an
interruption in the sensor circuit
■
Technical specifications
■
Dimensional drawings
5TT343 motor protection relays
5TT3431
5TT3432
Standards IEC 60255; DIN VDE 0435-110
Rated operational voltage U
c
V AC 230
Primary operating range × U
c
0.9 ... 1.1
Rated frequency Hz 50/60
Response value kΩ3.2 ... 3.8
Release value kΩ1.5 ... 1.8
Minimum contact load V; mA 10; 100
Rated insulation voltage U
i
Between coil/contact kV 4
Rated impulse withstand voltage U
imp
Actuator/contact kV > 2.5
Contacts μ contact (AC-11) A 3
• Rated operational voltage U
e
V AC 230
• Rated operational current I
e
A 5
Actuator/contact mm 4
Connections
• Terminals ± Screw (Pozidriv) PZ 1
• Conductor cross-sections
- Rigid Max. mm
2
2 x 2.5
- Flexible, with end sleeve Min. mm
2
1 x 0.5
Permissible ambient temperature °C -20 ... +60
Climatic withstand capability Acc. to EN 60068-1 20/60/4
5TT3431 5TT3432
36 36 54364
45
90
I201_11530a
A1 P1 P2 A1
A1
12
14 11 24 2114 11 24 21
2212 22
P1 P2
X1 X2
A2
© Siemens AG 2016
63
Siemens · 10/2015
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 motor protection relays
■
Circuit diagrams
Graphical symbols
Typical circuit for 5TT3431, 5TT3432
If one of the thermistors (possible for up to 6) reaches the
response temperature, the device switches.
5TT3431 (without terminals X1/X2 and without RESET button)
switches back on after cooling and after the value falls below
that permanently set for the hysteresis. To switch on before this
time, briefly disconnect the power supply.
5TT3432 stores the fault and remains switched off until the
RESET button is pressed.
5TT3431 5TT3432
2111
22241214
P1 P2
A1 A2
2111
22241214
X2X1P2P1
A1 A2
L1 N
A1 A2
14
11
12
24
21
22
X2
X1
1...6 v +
M
I201_07041c
Reset
pushbutton
230 V AC
R
I201_07280e
11-14
P1/P2
5TT3432: 11-12
11-14
5TT3431: 11-12
(X1/X2)
H
U
t
t
3,2 k
1,8 k
TEST/
RESET
TEST/
RESET
TEST/RESET
pushbutton
Overtemperature/
sensor breakage
Voltage
failure RESET
© Siemens AG 2016
64 Siemens · 10/2015
Notes
Monitoring Devices
© Siemens AG 2016
© Siemens AG 2016
The information provided in this brochure contains merely general
descriptions or characteristics of performance which in case of actual
use do not always apply as described or which may change as a result
of further development of the products. An obligation to provide the
respective characteristics shall only exist if expressly agreed in the
terms of contract. Availability and technical specifications are subject
to change without notice.
All product designations may be trademarks or product names of
Siemens AG or supplier companies whose use by third parties for their
own purposes could violate the rights of the owners.
Siemens AG
Energy Management
Low Voltage & Products
Postfach 10 09 53
93009 REGENSBURG
GERMANY
Subject to change without prior notice
PDF (3ZW1012-5SV80-0AC1)
PH 0216 64 En
Produced in Germany
© Siemens AG 2016
www.siemens.com/lowvoltage
© Siemens AG 2016
