● JN15-24 series indoor earthing switch is a new design and improved product of our company according to the JN15 type, (the installing size without any change),suitable for electric power system with 20-24KV, Three-phase, AC 50(60) Hz, supported with various kinds of HV switchgear and as earthing protection.
● Standard: IEC 129,IEC 62271-102.
Ambient temperature:-10~+40℃
Altitude: ≤2000m
Relative humidity: Day average relative humidity ≤95% Month average relative humidity ≤90%
Earthquake intensity: ≤8degree
Class of pollution: II
| Item | Units | Data | |
| Rated voltage | kV | 24 | |
| Rated short time withstand current | kA | 31.5 | |
| Rated short circuit withstand time | S | 4 | |
| Rated short circuit making current | kA | 80 | |
| Rated peak withstand current | kA | 80 | |
| Rated | 1min power frequency withstand voltage | kV | 65 |
| insulation level | Lightning Impulse withstand voltage | kV | 95 |
| Mechanism life | time | 2000 | |
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