China Outdoor 500kVA 630kVA 800kVA 1000kVA 1250kVA 1500kv 1600kVA Prefabricated Combination Compact Transformer Substation, Find details about China Ring Main Unit, Switchgear from Outdoor 500kVA 630kVA 800kVA 1000kVA 1250kVA 1500kv 1600kVA Prefabricated Combination Compact Transformer Substation
Rated voltage | 12kV | 17,5kV | 24kV |
Frequency | 50 or 60 Hz | ||
Insulation level | |||
Industrial frequency 50Hz 1 min. insulation Ud (kv rms) | 28 | 38 | 50 |
isolation Ud (kv rms) | 32 | 45 | 60 |
Impulse 1.2/50us insulation Ud (kv rms) | 75 | 95 | 125 |
isolation Ud (kv rms) | 85 | 110 | 145 |
Tank interal arc withstand | 20kA 1s |