JN15-12KV high voltage earthing switch
JN15 12 kv series indoor high voltage earthing switch is a compositional type, and the technical parameters is corresponding to the requirements of IEC62271-102:2002. It is applicable for three-phase power system of 3-12kv, AC 50HZ. It can be used together with many types high voltage switchgear as a earthing protection unit.
2.1Altitude should not exceed 1000 m
2.2The ambient temperature: -25℃~ +40℃
2.3The seismic intensity should not exceed 8 degree.
2.4Relative humidity should not exceed 95%, monthly average value should not exceed 90%.
2.5Pollution degree: Ⅱ
Main technical parameters
Rated voltage: 12 kv
Rated short-time withstand current: 31.5 KA
Rated short-circuit duration time: 4 s
Rated making current: 80KA
Rated withstand current(peak value): 80KA
Pole to pole distance: 150 mm, 210 mm, 230 mm, 250 mm, 275 mm
Power frequency withstand voltage(1 minute) To earth, phase to phase: 42 kv, 48 kv