Product overview
JN17-12/40 high voltage grounding switch is a new grounding switch with national standard level, which is designed and developed by our company according to the prototype of ES1 grounding switch. The structure is combined, which is suitable for indoor 3-10kV three-phase AC 50(6O)Hz power system. It has a certain closing ability to protect other electrical equipment in switchgear from being damaged, and can be used with various high-voltage switchgear as grounding protection when overhauling high-voltage electrical equipment.
Product definition
Working Condition
Ambient temperature:-10°C-+40°C;
Altitude: ≤1000m;
Relative humidity: Daily average ≤ 95%,
Monthly average ≤ 90%
Earthquake intensity:≤ 8 degree;
Dirtiness degree: ll
Technical Parameters
No. | Item | Unit | Data | |
1 | Rated voltage | KV | 12 | |
2 | Rated short time withstand current | KA | 31.5 | |
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 | |
Installation drawing and hole location diagram
Specification | E | F | G | H | D |
JN17-12/40-210 | 210 | 50 | 185 | 655 | 516 |
JN17-12/40-220 | 220 | 50 | 185 | 675 | 536 |
JN17-12/40-230 | 230 | 50 | 185 | 695 | 556 |
JN17-12/40-250 | 250 | 50 | 185 | 735 | 596 |
JN17-12/40-275 | 275 | 50 | 210 | 810 | 646 |
Order notes
Please indicate the product specifications and the central distance between poles.
Please confirm whether the electrical display model number is required.
Note the soft link length when ordering (normal length =250mm).
If you have any special requests, please consult us.
