JN22B-40.5/31.5 series indoor HV earthing switch is researched and developed by our company based on original JN15 type, supporting with electric power system 40.5KV, AC 50Hz, match KYN□-40.5 and other various kinds of HV switchgear and as earthing protection. It is manufactured comply with GB1985-2004 and IEC129 standard.
Relative humidity: Day average relative humidity ≤95%
Month average relative humidity ≤90%
Earthquake intensity: ≤8degree
Appliable in the place without corrosive, flammable gas and water place