Audited Supplier
1. Overview
JN22-12/40 indoor high-voltage grounding switch (hereinafter referred to as grounding open) is a horizontal product with high technical parameters and performance developed by Xi'an High Voltage Electrical Appliance Research Institute. After assessment, its performance conforms to the provisions of GBl985 "AC High Voltage Isolation Magnetic and Grounding Switch", suitable for 40.5kV, AC 50Hz power system, can be used with KYND-40.5 model and other types of high-voltage switchgear, and can also be used as grounding protection for high-voltage electrical equipment maintenance.
Second, the use of environmental conditions
1. Ambient air temperature: upper limit +40 degrees, lower limit -30 degrees;
2. Altitude: no more than 1000 meters;
3. Humidity conditions: the average daily relative humidity does not exceed 95%;
4. The average monthly relative humidity does not exceed 90%;
5. Seismic intensity: no more than 8 degrees;
6. Pollution level: Class II.
| Main technical parameters: | ||||
| project | unit | data | ||
| Rated voltage | KV | 40.5 | ||
| Rated short-time withstand current | KV | 31.5:40 | ||
| Rated short-circuit duration | S | 4 | ||
| Rated short-circuit closing current | KA | 80 | ||
| Center distance between poles | KA | 80 | ||
| Rated insulation level | 1min power frequency withstand voltage | mm | 300-350-400 | |
| Withstand voltage for lightning impulses | KV | Ground-to-ground, interphase/interstage | 42/48 75/85 | |
