What is the Indoor grounding switch (earthing) JN15-12-12KV
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
- The altitude does not exceed 1000m;
- Ambient air temperature: upper limit +40℃, lower limit -10℃;
- Allow storage and transportation at 30℃;
- The seismic intensity does not exceed 8 degrees;
- 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 | |||

