main application
The Indoor AC Grounding Switch is used in substations and power plants to safely ground high-voltage circuits during maintenance or repairs. It ensures that electrical equipment is safely discharged, preventing electric shocks and equipment damage. The switch is crucial for isolating sections of the power grid or disconnecting circuits for maintenance, providing safety for technicians. It features durable construction, easy operation, and safety mechanisms like grounding status indicators and locking systems, ensuring reliable and safe performance in high-voltage environments.
Indoor AC Grounding Device is an internationally advanced product developed by advanced technology, whose structure is assembly.
After comprehensive assessment, the performance meets the requirements of GB1985-2004 AC high voltage isolating switch and grounding switch and IEC62271-102:2002, which is applicable to 3-12KV three-phase AC 50Hz power system; it has short-circuit off-off capability to protect other electrical equipment in the switchgear from damage, and can be used with various high voltage switchgear, or as grounding protection during maintenance of high voltage electrical equipment.
Use environmental conditions
1. The altitude shall not exceed 1000m;
2. Surrounding air temperature: upper limit + 40℃, lower limit-25℃;
3. the earthquake intensity does not exceed 8 degrees;
4. The daily average relative humidity shall not be greater than 95%, and the monthly average shall not be greater than 90%;
5. filth grade:11。
INDOOR HIGH VOLTAGE EARTHING SWITCH
Model No. and Description
Main technical parameters
| Main technical parameters | unit | data | ||
| rated voltage | KV | 12 | ||
| Rated short-time withstand current | KA | 31.5 | ||
| Rated short-circuit duration | S | 4 | ||
| Rated short-circuit switch-off current | KA | 80 | ||
| Rated peak withstand current | KA | 80 | ||
| Rated insulation level | Power frequency withstand voltage is 1min | KV | Extreme to ground and alternate | 42 |
| Lightning peak withstand voltage | 75 | |||
| mechanical life | Times | 3000 | ||
JNI 5-12 (7.2) / 31.5(2)Ground switch shape and installation size
Supporting table
| product prototype | Phase spacing A | Support B | principal axis C | pitch-row D | Plateau type ratio sensor height E |
| JNI 5-12 (7.2) / 31.5(2)-150 | 150 | 424 | 535 | 396 | |
| JNI 5-12 (7.2) / 31.5(2)-165 | 165 | 454 | 565 | 426 | 145, below 1,000 m 170, below 2,000 m 185, below 3,000 m 210, below 4,000 m |
| JNI 5-12 (7.2) / 31.5(2)-210 | 210 | 544 | 655 | 516 | |
| JNI 5-12 (7.2) / 31.5(2)-250 | 250 | 624 | 735 | 596 | |
| JNI 5-12 (7.2) / 31.5(2)-275 | 275 | 674 | 785 | 646 |
ordering instruction
1. When ordering the grounding switch, indicate the product model, distance and whether equipped with is equipped (and indicate the display model).
2. Users should indicate the upper and lower positions of the timely moving and static contacts when the earth switch is installed in the cabinet.
3. If users have special requirements, please contact our company.
Factory
Certificate
Address
No.1083 Zhongshan East Road, Yinzhou District, Ningbo City, Zhejiang Province, China
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