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What is the Indoor grounding switch (earthing) JN15-12-12KV

2025-11-05

There shall have no conductive dust,no corrosive gasess,no severe vobaration and impact.no combustion and explosion on the site for switch operating.

JN15A-12/31.5 Indoor AC high voltage grounding switche use resin insulators, on which live parts, made of silver-plated electrolytic copper (99.9%), are placed. The blades are directly connected to the drive shaft. Contact elements are overdimensioned according to the requirements in order to guarantee, together with a high contact pressure between blades and contacts, a reduced ohmic resistance at the contact surface and a minimum metal wear-off during the life of the Grounding Switch, with the necessary robustness to withstand thermal and mechanical stresses under short-circuit conditions.

 

 

 

 

Environmental conditions

  1. The altitude does not exceed 1000m;
  2. Ambient air temperature: upper limit +40℃, lower limit -10℃;
  3. Allow storage and transportation at 30℃;
  4. The seismic intensity does not exceed 8 degrees;
  5. No flammable, explosive, severe dust, chemical corrosion and severe vibration.

 

The main technical parameters

Item

Unit

Value

Rated voltage

KV

12

Rated short-time withstand current

KV

31.5

Rated short circuit duration

S

4

Rated short circuit closing current

KA

80

Rated peak withstand current

KA

80

Center distance between poles

mm

150,210,275

 Rated insulation level

1min power frequency withstand voltage

 KV

 42/48

 

75/85

Lightning impulse withstand voltage