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FZN25,FZRN25 vacuum load switch and composite apparatus,suitable for three-phase AC 50Hz ring network or terminal power supply and industrial electrical equipment,for load control and short circuit protection use,load switch open and close the closed loop current,no-load transformer and cable charging current,composite apparatus can break any current till ated short circuit current
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Item | Unit | FZN25-12D/ T630-20 | FZRN25-12D/ T125-20 |
Voltage, current parameters | |||
Rated voltage | kV | 12 | |
Rated frequency | Hz | 50 | |
Rated current | A | 630 | 125 |
Rated short time power frequency withstand voltage (1min) | kV | Interrupter fracture 30; phase to earth 42; isolation fracture 48 |
|
Rated lightning impulse withstand voltage (peak) | kV | Phase to earth 75; isolation fracture 85 |
|
Rated peak withstand current | kA | 50 | - |
4s rated short-time withstand current | kA | 20 | - |
Rated active load breaking current | A | 630 | - |
Rated loop breaking current | A | 630 | - |
Rated cable charging breaking current | A | 10 | - |
Interrupting no load transformer capacity | kVA | 1250 | - |
Rated short-circuit breaking current | kA | - | 31.5 |
Rated transfer current, rated AC current | A | - | 2000 |
Fuse type | SDLAJ-12 SFLAJ-12 | ||
The impactor energy output | J | 2-5 (medium) | |
Rated short-circuit closing current | kA | 50 | |
Grounding switch rated stability current | kA | 50 | |
Grounding switch 2S thermal stability current | kA | 20 | |
The auxiliary circuit rated voltage | V | ≌220/110 | |
Mechanical life | Times | 10000 |