Single Phase Smart Meter

Item

Parameter

Accuracy (kWh)

Class B (EN 50470-3) or Class 1 (IEC 62053-21)

Accuracy (kvarh)

Class 2 (IEC 62053-23)

Basic current Ib

10A

Maximum current Imax

100A(Direct Connection)

Minimum current

0.05Ib

Starting current

0.004Ib(Direct Connection)

Rated voltage Un

230 V

Operating voltage range

85~480V(wide voltage range)

Operating frequency

50Hz

Communication interface

1 circuit optical interface

1 circuit Connect to external GPRS module

1circuit M-bus wired module built-in(option)

1circuit RJ11 wired module built-in(option)

Communication Protocol

Optical: IEC62056-21 E mode

GPRS: DLMS/COSEM

MBus: En13757-3

RJ11: IEC62056-21 D mode

Optical interface

IEC/EN standards

Relay

1 Main contactor(100A);

RTC

≤0.5s/day(normal temperature)

RTC support

10 years battery operation life

Operating for at least 2 years in case of any power failure

Backup battery

Battery can be replaced

Ultra capacitor can maintain RTC for at least 5 minutes

Pulse constant

1000 imp/kWh

Power consumption

Current circuit power consumption<1VA

Voltage circuit power consumption<2W/10VA

Compression strength

4kV, 50Hz, 1 minute

Anti-surge

Voltage

6kV, 1.2/50μs

Current

5kA, 8/20μs

Immunity to short-circuit current

30Imax

Immunity to electrical fast transients/bursts (EFTB)

4 kV (IEC 61000-4-4)

Anti-magnetic

Anti-strong magnetic, magnetic detection and display

Anti-strong magnetic, magnetic detection and display

-25°C ~ +70°C

Storage temperature

-40°C ~ +85°C