... kind of single phase two wire active energy meter which purchase electricity by IC card, electric energy measuring, load control ... 62053-21.Direct connect operation, there are two types wiring you may select. Standard configuration type 1A wiring, may select ... 4kV for 1 minute, 1.2/50us waveformimpulse voltage 6kV*If you need different reference voltage or current specification, please advisory our ...