Key Features
Rated voltage: 12kV, rated current: 630A
Breaking capacity: 25kA (short circuit)
Withdrawable handcart design, easy to install and maintain
Vacuum interrupter with triple-sealed insulation
Epoxy “T” pole cast with APG technology
Fuse-blown trip function, ensuring double protection
Full mechanical interlock and visible disconnection
Modular terminal layout for easy wiring replacement
Mechanical Characteristic Parameters
| No. | Item | Unit | Parameter |
| 1 | Contact gap | mm | 9±1 |
| 2 | Contact pressure spring travel | mm | 4±1 |
| 3 | Phase center distance | mm | 210/275 |
| 4 | Opening/closing time difference | ms | ≤2 |
| 5 | Contact closing spring time | ms | ≤3 |
| 6 | Average closing speed | m/s | 0.4~0.8 |
| 7 | Average opening speed | m/s | 1.0~1.4 |
| 8 | Closing time (rated voltage) | ms | ≤60 |
| 9 | Opening time (rated voltage) | ms | ≤30 |
| 10 | Main circuit resistance | mΩ | ≤250 |
| 11 | Allowable wear thickness of contacts | mm | 3 |
Technical Parameters
| No. | Name | Unit | VZF-12/T630-20 Vacuum Load Switch | VZFR-12/T125-50 Vacuum Load Switch – Fuse Combination |
| 1 | Rated voltage | kV | 12 | 12 |
| 2 | Power frequency withstand voltage (phase/earth) | kV | 42 | 42 |
| 3 | Lightning impulse withstand voltage (phase/earth) | kV | 75 | 75 |
| 4 | Rated current | A | 630 | 125 (Fuse) |
| 5 | Rated short-circuit breaking current | kA | – | 50 (Fuse) |
| 6 | Rated short-time withstand current | kA | 20 | – |