Current 0·5% of nominal
Frequency 0·2% of mid-frequency
Power factor 1% of unity (0.01)
Active power (W) ±1% of range maximum
Reactive power (VAr) ±2% of range maximum
Apparent power (VA) ±1% of range maximum
Active energy (Wh) Class 1 IEC 62053-21
Reactive energy (VARh) ±2% of range maximum
Total harmonic distortion 1% up to 19st harmonic
Temperature co-efficient Voltage and current = 0.013%/°C typical
Active energy = 0·018%/°C, typical
Response time to step input 1s, typical, to >99% of final reading, at 50 Hz.
Interfaces for External Monitoring
Three interfaces are provided:
an MBus communication channel that can be programmed for MBus EN13757-3 protocol
an Pulse output(Pulse 1) indicating real-time measured energy.(configurable)
an Pulse output(Pulse 2) 400imp/kWh
The Modbus configuration (Baud rate etc.) and the pulse output assignments (kW/kVArh,
import/export etc.) are configured through the Set-up screens.
Pulse Output
The unit provides two pulse outputs. Both pulse outputs are passive type.
Pulse output 1 is configurable. The pulse output can be set to generate pulses to represent total /
import/export kWh or kVarh.
The pulse constant can be set to generate 1 pulse per:
dFt = 2.5 Wh/VArh
0.01 = 10 Wh/VArh
0.1 = 100 Wh/VArh
1 = 1 kWh/kVArh
10 = 10 kWh/kVArh
100 = 100 kWh/kVArh
Pulse width: 200/100/60ms
Pulse output 2 is non-configurable. It is fixed up with active kWh. The constant is 400imp/kWh.
MBus Output for EN_13757-3
For MBus EN13757-3, the following MBus communication parameters can be configured from the
Set-up menu:
Baud rate 300, 600, 1200, 2400, 4800, 9600
Parity none (default)/odd/even
Stop bits 1 or 2
MBus network primary address nnn –3-digit number, 001 to 250
MBus network secondary address 00 00 00 01 to 99 99 99 99(The secondary address can
not be setted directly on meter, but can be done via Mbus communication)