Product leaflet
Single phase electricity meters B21
EQ meters in Steel version from ABB
The compact and versatile EQ meters B21 is a single
phase meters with outstanding performance. It can be
used in most of the common applications for reliable
and trustworthy metering of energy usage.
EQ meters B21 in Steel version can be used in stand-
alone applications or metering network installations
with the option of inbuilt M-Bus or Modbus.
General features
B21 is a single phase direct connected meter up to 65 A.
The B21 is measuring active energy with accuracy class
B (Cl. 1). The low rated or base currents of the meter ensures
high dynamic performance with superior accuracy even at
low currents. Navigation the meter is easily done via the
push-buttons below the display. The exceptional low power
consumption of the meter, less than 0.9 VA, makes it
economical in the long run - an important feature specially for
large meter populations.
Communication
Data from B21 can be collected via pulse output or serial
communication. The meter are equipped with a transistor
output for 5-40 VDC external supply. It can be used for puls-
es proportionally to the measured energy or various alarms.
The meter is also available with built-in serial communication
interfaces for Modbus RTU (RS-485) or M-Bus.
Instrumentation
The B21 meter support reading of instrument values.
A large number of electrical properties can be read.
• Active power
• Voltage
• Current
• Power factor
• Frequency
Approvals
The B21 meter is type approved according to IEC as well as
type approved and verified according to MID.
MID is the Measure Instruments Directive 2004/22/EC from
European Commission. The type approval is according to stan-
dards that covers all relevant technical aspects of the meter.
These include climate conditions, electromagnetic compatibility
(EMC), electrical requirements, mechanical requirements and
accuracy.
Ordering details
65 A direct connected, 2 DIN
Voltage V Communication Type Order code Weight
1 pc
Steel
Active energy, pulse output, class B (Cl. 1)
1 x 230 V AC - B21 111 - 100
2CMA100149R1000
0.14
RS-485 B21 112 - 100
2CMA100150R1000
0.15
M-Bus B21 113 - 100
2CMA100151R1000
0.15
The B21 meter is type approved according to IEC as well as
type approved and verified according to MID.
MID is the Measure Instruments Directive 2004/22/EC from
European Commission. The type approval is according to stan-
dards that covers all relevant technical aspects of the meter.
These include climate conditions, electromagnetic compatibility
(EMC), electrical requirements, mechanical requirements and
Product leaflet 2CMC485004L0201, rev. B, July 2014 Prod ABB AB, LP/XM
B series
Technical data
© Copyright 2014 ABB. All rights reserved. Specication subject to
change without notice.
ABB AB
Meters
Box 1005
SE-611 29 NYKÖPING, Sweden
Telephone +46 155 29 50 00
Telefax +46 155 28 81 10
www.abb.com
Wiring diagram B21
35
L
N
1
B21
Voltage/current inputs
Nominal voltage 230 V AC
Voltage range 220-240 VAC (-20% - +15%)
Power dissipation voltage circuits 0.9 VA (0,4 W) total
Power dissipation current circuits 0.014 VA (0.014 W) at 230 V AC and Ib
Base current Ib5 A
Reference current Iref 5 A
Transitional current Itr 0.5 A
Maximum current Imax 65 A
Minimum current Imin 0.25 A
Starting current Ist < 20 mA
Terminal wire area 1 - 25 mm2
Recommended tightening torque 3 Nm
Communication
Terminal wire area 0.5 - 1 mm2
Recommended tightening torque 0.25 Nm
Pulse indicator (LED)
Pulse frequency 1000 imp/kWh
Pulse length 40 ms
General data
Frequency 50 or 60 Hz ± 5%
Accuracy Class B (Cl. 1)
Active energy 1%
Display of energy 6 digit LCD
Environmental
Operating temperature -40°C - +70°C
Storage temperature -40°C - +85°C
Humidity 75% yearly average, 95% on 30 days/year
Resistance to fire and heat Terminal 960 °C, cover 650°C (IEC 60695-2-1)
Resistance to water and dust IP20 on terminal block without protective enclosure and IP51 in protective enclosure,
according to IEC 60529.
Mechanical environment Class M1 in accordance with the Measuring Instrument Directive (MID). (2004/22/EC).
Electromagnetic environment Class E2 in accordance with the Measuring Instrument Directive (MID), (2004/22/EC).
Outputs
Current 2 - 100 mA
Voltage 5 - 40 VDC.
Pulse output frequency Programmable: 1 - 999999 imp/kWh
Pulse length Programmable: 10 - 990 ms
Terminal wire area 0.5 - 1 mm2
Recommended tightening torque 0.25 Nm
EMC compatibility
Impulse voltage test 6 kV 1.2/50μs (IEC 60060-1)
Surge voltage test 4 kV 1.2/50μs (IEC 61000-4-5)
Fast transient burst test 4kV (IEC 61000-4-4)
Immunity to electromagnetic HF-fields
80 MHz - 2 GHz (IEC 61000-4-6)
Immunity to conducted disturbance 150kHz - 80MHz (IEC 61000-4-6)
Immunity to disturbance with harmonics 2kHz - 150kHz
Radio frequency emission EN 55022, class B (CISPR22)
Electrostatic discharge 15 kV (IEC 61000-4-2)
Standards
IEC 62052-11, IEC 62053-21 class 1, IEC 62054-21, GB/T 17215.211-2006, GB/T
17215.312-2008 class 1, GB 4208-2008, EN 50470-1, EN 50470-3 category B
Mechanical
Material Polycarbonate in transparent front glass. Glass reinforced polycarbonate in bottom
case and upper case. Polycarbonate in terminal cover.
Dimensions
Width 35 mm
Height 97 mm
Depth 65 mm
DIN modules 2
This QR-code is linked to our web site
www.abb.com/lowvoltage.
You will have to download a QR-code
reader app to your phone in order to use it.
