12kv earthing switch grounding knife with 150mm phase distance for grounding protection in switchgear
▶Main applications
JN15-12/31.5 series indoor high voltage earthing switch is an earthing switch with internationally advanced level produced by the company with advanced technology and assembling structure,its performance meets the requirements of GB1985-2004 High-voltage alternating-current disconnectors and earthing switches and IEC62271-102:2002,it is suitable for indoor three-phase AC 50(60)Hz power systems from 3 to 12kV;its short-circuit making capacity protects other electrical equipment in the switchgear from being damaged,it can be used with various high-voltage switchgears,and acts as a ground protection device during maintenance of high-voltage electrical equipment.
▶ Service conditions
1.Ambient air temperature:-20℃~+40℃;
2.Altitude not exceeds 1,000m,please specify in the order if exceeds 1,000m.
3.Relative humidity:daily mean not over 95%,monthly mean not over 90%;
4.Seismic intensity:≤Ms8;
5.Pollution class:class II.