Overview
JN22B-40.5 indoor high voltage grounding switch (hereinafter referred to as grounding switch) is a new product developed by the company. Its performance complies with the national standard GB1985-2004 "(AC high-voltage isolating switch and grounding switch" national standard, suitable for three-phase rated voltage 40.5kV, AC 50Hz power system, can be used with KYN61-40.5 high-voltage switchgear and other types of high-voltage switchgear It is used as a complete set for grounding protection during maintenance of high-voltage electrical equipment. JYN22B-40.5/31.5 type high-voltage ground switch in the corpse is caused by steam and live parts in the industrial cluster, which is convenient for small-angle operation, and is the same as the JN15-12 indoor high-voltage grounding switch , The connection and transmission parts of the JN15-12 indoor high-voltage grounding switch can be used.
Model meaning
Normal use environment
1. The altitude does not exceed 1000m;
2. Ambient air temperature: upper limit +40°C, unlimited -10°C;
3. It is allowed to store and transport at 30℃;
4. The seismic intensity does not exceed 8 degrees;
5. No flammable, explosive, severe dust, chemical corrosion and severe vibration places.
The main technical parameters
| No. | project | Unit | project |
| 1 | Rated current | kA | 40.5 |
| 2 | Rated short-time withstand current | kA | 31.5 |
| 3 | Rated short circuit duration | s | 4 |
| 4 | Rated short-circuit making current | kA | 80 |
| 5 | Rated peak withstand current | kA | 80 |
| 6 | Phase center distance | mm | 210,230,250,275 |
| 7 | Rated insulation level | kV | 42 |
| kV | 75 |
Shape and installation dimensions
Installation Cutout Diagram
| Model | E | G | L | D |
| JN22B-40.5/31.5-280 | 280 | 290 | 1010 | 656 |
| JN22B-40.5/31.5-300 | 300 | 340 | 1100 | 696 |
| JN22B-40.5/31.5-350 | 350 | 340 | 1200 | 796 |
| JN22B-40.5/31.5-360 | 360 | 320 | 1200 | 816 |
| JN22B-40.5/31.5-400 | 400 | 340 | 1300 | 896 |
Note: When the distance is less than 360, add insulating plates between the phases.
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