Category
35kV MV Indoor Load Break Switch-Fuse Combination, FN12-35
1. General description
EXFN12 series vacem mv load break switch is widely used in high-voltage power transmission and distribution equipment. Due to its good breaking performance and reliable short-circuit current tolerance, it meet the requirements of any power grid. When the load break switch is used in combination with the current limiting fuse, it can effectively protect the distribution transformer within 1250kVA. After the EXFN12 series reliable medium voltage load break switch is installed in the switchgear and other equipment, it has the following advantages: - The switch can completely separate the busbar compartment and the cable compartment by opening and closing - Since the moving contact moves vertically, the switch can be seen intuitively and grounding opening and closing state. -Because of the fuse holder, the earthing switch is integrally installed on the load break switch. After the load break switch is installed on the equipment, there is no need to debug the fuse and the earthing switch separately.
2. Technical parameter
Product Type Name | FN12 | |||
Rated voltage | kV | 12 | 24 | 40.5 |
Rated current | A | 630 | 630 | 630 |
Rated frequency | Hz | 50/60 | 50/60 | 50/60 |
Rated short-circuit making current | kA Peak. | 50 | 31.5 | 31.5 |
Rated peak withstand current | kA Peak. | 50 | 50 | 50 |
Short time withstand current | kA eff. | |||
1s | 25 | |||
3s | 20 | 20 | 20 | |
Maximum breaking current (when used with fuse) | A | 2000 | 2000 | 1700 |
Maximum fuse current (xrnt fuse) | A | 200 | 200 | 100 |
Rated short-time power frequency withstand voltage 50Hz 1 min: | ||||
- Phase to phase, to earth | kV | 42 | 65 | 95 |
- Fracture | kV | 48 | 79 | 110 |
Rated lightning impulse withstand voltage 1.2/50 μs | ||||
- Phase to phase, to earth | kV | 75 | 125 | 185 |
- Fracture | kV | 85 | 145 | 215 |
Mechanical life | ||||
-Load break switch and earthing switch | cycles | 2000 | 2000 | 2000 |
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