JN15-12 indoor HV earthing switch absorbs advanced new technics from domestic and abroad. It conforms to GB1985 AC HV disconnect switch and earth switch, relative standards IEC60129 and passes KEMA test. The apparatus applies to power system of rating below 12kV/40.5kV,and AC 50/60Hz,It is suitable for various types HV switchgear for earthing protection. The holistic earthing switch consists of basis,supporting insulator,main axis,main blade,fast spring,fixed and moving contact,Additional electronic display is also available according to the user's requirement.
|rated short time tolerance current||31.5kA|
|rated short circuit duration time||4s|
|rated short circuit closing current||80kA|
|rated peak value tolerance current||80kA|
|1min working voltage tolerance||42kV|
|lightning impulse voltage tolerance||75kV|
Normal Service Conditions:
1 The altitude does not exceed 1000m.
2 The ambient air temperature: Maximum+40°C:Minimum: General Area-30°C, Paramos-40°C.
3 The wind pressure does not exceed 700Pa.
4 The earthquake intensity does not exceed 8 degrees.
5 The working situation without frequent violent vibration.
6 The installation site of ordinary type isolator should be kept away from gas, smoke chemical deposition, salt-spray-fog, dust and other and corrosive maters that affect seriously insulation and conuction capability of the isolator.
7 Pollution-proof type isolator is applies to severe filthy conduction area
8 It shouldn't be any explosive matters and matters causing fire.