Classification：Isolation switch
Inside Road & Administration Industry & Trading Garden,Houshan Industry Area,Fuzhou City,Fujian Province
0591-22806687 0591-22806697
0591-22806667
JN4-12 (G) type indoor high-voltage grounding switch is the main component of 12KV indoor AC metal canned removable metal-enclosed switchgear and other high-voltage switchgear. It can also be used alone.
As grounding protection in AC 50HZ power system of 12KV and below, it has the ability to close short-circuit current, reasonable structure, small size, flexible operation and easy installation and adjustment.
Use environment:Altitude 1000-3000m; ambient air temperature: upper limit +40°C: lower limit -25°C The seismic intensity does not exceed 8 degrees
There is no fire, no danger of explosion, severe dust, chemical corrosion and severe vibration.
| Project | Unit | Data | |
| Rated voltage | KV | 12 | |
| Rated short-time withstand current | Hz | 20 | |
| Rated short circuit duration | S | 4 | |
| Rated short circuit closing current | KA | 50 | |
| Rated peak withstand current | KA | 50 | |
| Center distance between poles | mm | 210; 230;250 | |
| Rated insulation level | 1minPower frequency withstand voltage | KV | 42 |
| Lightning impulse withstand voltage | 75 | ||
| Type | L | E | C |
|
| JN4-12G/20-210 | 752 | 210 | 618 | |
| JN4-12G/20-230 | 792 | 230 | 668 | |
| JN4-12G/20-250 | 832 | 250 | 708 |
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0591-22806687 0591-22806697
0086-13950298099
0591-22806667
Inside Road & Administration Industry & Trading 
Sampras@china-grid.com.cn