Joyelectric International is a professional China 40.5kv earthing switch distributor and agent among those well-known such manufacturers and suppliers, welcome to order 40.5kv earthing switch products from our factory and company.JN15-40.5/31.5 series of Indoor HV A.C Earthing Switch Ambient Condition:1. The height above sea level shall be no more than 1000 meter;2. Ambient air temperature: 40℃~ -10℃3. Seismic intensity: no more than 8 magnitude 4. It shall be installed in the place without dust, fire, chemical erosion, explosion, vapor