®
2007
1.3 Performance criteria:
Operating humidity ≤ 75%
Storage humidity ≤ 95%
Operating temperature -10°C - +50°C
Storage temperature -30°C - +70°C
International standard
IEC 62053-21
Accuracy class
1
Protection against penetration
of dust and water IP51
Insulating encased meter of
protective class Ⅱ
1.4 Specifications:
Meter type PRO-1250A (register display)
PRO-1250D (LCD display)
Nominal voltage
(Un)
230/400V AC (3~)
Operational voltage
161/279 – 300/520V AC (3~)
Insulation capabilities:
- AC voltage withstand 2KV for 1 minute
- Impulse voltage withstand 6KV – 1.2µS waveform
Basic current (Ib)
CT version
1A
Direct version
10A
Maximum rated current (Imax)
CT version
5A
Direct version
100A
Operational current range
0.4% Ib- Imax
Over current withstand
30Imax for 0.01s
Operational frequency range
50Hz ±10%
Internal power consumption
≤2W / 10VA per phase
Test output flash rate (PULSE LED)
CT version
1600imp/kWh
Direct version
400imp/kWh
Test pulse output rate (pins 8 & 9)
CT version
1600imp/kWh
Direct version
400imp/kWh
L1, L2, L3 LED indicators
Meter is connected to power
Consumption indicator (Red LED)
Flashing at load running
1.5 Basic errors:
With balanced loads
0.05Ib
Cosφ = 1
±1.5%
0.1Ib
Cosφ = 0.5L
±1.5%
Cosφ = 0.8C
±1.5%
0.1Ib - Imax Cosφ = 1
±1.0%
0.2Ib - Imax Cosφ = 0.5L
±1.0%
Cosφ = 0.8C
±1.0%
With single phase load
