General
JN12-40.5/31.5 type indoor H.V earthed switch series indoor H.V electrical equipment, its function meets GB1985-89<<AC H.V disconnector and earthed switch>>and IEC129 requirement, apply to rated voltage 40.5KV, three phase AC 50HZ system. As the reliable earth of H.V electrical equipment when it is repairing, to ensure device and serviceman’s safety.
Operating Environment Condition:
Environment temperature: -25°C~ +40°C Average value below 35°C
Sea level elevation: not exceeding 2000m
Relative humidity: day average value not more than 95% month average value not more than 90%
Steam pressure day average value not more than 2.2×10-3Mpa Month average value not more than 1.8×10 -3Mpa
Earthquake Intensity: not exceeding 8°
Filthy rank:II
Main technology data:
Rated Voltage : 40.5kv
Most working voltage : 40.5kv
4s rated short time withstand current : 20kv 25kv 31.5kv
Rated peak withstand current : 50KA 63KA 80KA
Cut and shut: 50KA 63KA
Power frequency withstand voltage : 95KV/min
Lighting shock withstand voltage : 185KV
Secondary circuit power frequency : 2KV/min ;
JN12-40.5/31.5 type indoor H.V earthed switch