FN7-12 Indoor high voltage load switch. Fuse combination appliance
Overview
The FN7-12DR series of indoor high-voltage load switches and fuse combination appliances are designed for three-phase AC power systems with an operating frequency of 50Hz and a rated voltage of 12kV. It can effectively break load current and close short-circuit current. Its rugged design and reliable performance make it an indispensable component in modern power distribution systems, ensuring the safety and efficiency of high-voltage applications. Its optimal operating temperature range is -10°C to +40°C, suitable for various geographical locations. In high-cold areas, the device can operate effectively at temperatures as low as -25°C. This versatility ensures that the FN7-12 can operate in a variety of climatic conditions from temperate regions to extremely cold regions without compromising performance.
Usage Environment
◆Ambient air temperature: Upper limit: +40℃; Lower limit: -10℃ in general areas, -25℃ in high-cold areas;
◆Altitude: Altitude is 1000m and below.
◆Relative humidity: daily average is not more than 95%, monthly average is not more than 90%;
◆The surrounding air should not be obviously polluted by corrosive or flammable gases and water vapor;
◆No frequent severe vibration.
Technical Parameters
|
Rated voltage (kV) |
12 |
||
|
Rated insulation level voltage |
Power frequency 50Hz withstand voltage 1min (kV) |
Phase to phase, phase to ground 42 |
Isolation break 48 |
|
1.2/5us impulse withstand voltage (kV) |
Phase to phase, phase to ground 75 |
Isolation break 85 |
|
|
Rated current(A) |
400 |
630 |
|
|
Rated short-time withstand current (kA, 4S) |
12.5 |
20 |
|
|
Rated peak withstand current (kA) |
31.5 |
50 |
|
|
Load switch, earthing switch, closing capacity (kA, peak value) |
31.5 |
50 |
|