12KV Indoor AC high voltage earthing switch JN17-12/40
Product definition
Introduction
JN17-12/40 (Old type is JN15-12/40) Series indoor high voltage earthing switch is a new design and improved product based on the ES1 type. The structure is assembled and suitable for electric power system with 3~10KV, three- phase and AC 50(60)Hz. As an earthing protection, it can be used in various kinds of HV switchgears. It meets GB1985-2004 and IEC129 standard.
Working condition
O Ambient temperature: -10°C -+40°C ; O Altitude: ≤1000m; O Relative humidity:Daily average≤95%，Monthly average≤90% O Earthquake intensit:≤8 degree; O Dirtiness degree: II.
Drawing
Hole location diagram
Technical Parameter
| No. | ltem | Unit | Data | |
| 1 | Rated voltage | KV | 12 | |
| 2 | Rated short time withstand current | KA | 40 | |
| 3 | Rated short circuit withstand time | S | 4 | |
| 4 | Rated short circuit making current | KA | 80 | |
| 5 | Rated peak withstand current | KA | 80 | |
| 6 | Rated insulation level | 1min power frequency withstand voltage | KV | 42 |
| Lightning Impulse withstand voltage | 75 | |||
| 7 | Mechanical life | TIMES | 2000 | |
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