Product Overview
The ZW8-12/630A outdoor high-voltage vacuum circuit breaker adopts vacuum arc extinction and air insulation with an electric spring operating mechanism, giving strong arc-extinguishing capability, a high number of short-circuit breaking operations, no fire or explosion hazard and easy operation; it is a product of excellent performance and high practicality.The ZW8-12/630A outdoor high-voltage vacuum circuit breaker adopts a three-phase common-box overall structure with bushing connections; the tank is filled with dry air and the electric spring operating mechanism is arranged on the side of the tank, allowing reliable use under rather severe environmental conditions.The vacuum interrupter adopts a ceramic envelope, a cup-shaped axial magnetic field contact structure and CuCr contact material, providing excellent short-circuit breaking and making capability.The ZW8-12/630A outdoor high-voltage vacuum circuit breaker is small, light and elegant in appearance. The vacuum interrupter and insulating support bushing are compactly designed, and the outgoing conductive rod is encapsulated with silicone rubber, adapting to harsh climatic and polluted environments.
Type Designation
Technical Parameters
| No. | Item | Unit | Value | |
|---|---|---|---|---|
| 1 | Rated voltage | kV | 12 | |
| 2 | Rated current | A | 630 | |
| 3 | Power-frequency dry withstand voltage (1 min) | kV | 42 | |
| 4 | Lightning impulse withstand voltage (peak) | 75 | ||
| 5 | Rated short-circuit breaking current | kA | 162025 | |
| 6 | Rated short-circuit making current | 405063 | ||
| 7 | Rated peak withstand current | kA | 405063 | |
| 8 | 4 s short-time withstand current | 162025 | ||
| 9 | Rated operating sequence | O-0.3s-CO-180s-CO | ||
| 10 | Number of rated short-circuit current breaking operations | operations | 30 | |
| 11 | Mechanical endurance | 10000 | ||
| Rated voltage of energy-storage motor | DC or AC 220 | |||
| 12 | Rated operating voltage (with special spring operating mechanism) | Opening coil | ||
| Closing coil | ||||
| 13 | Rated current of over-current release | A | 5 | |
| 14 | Allowable wear thickness of moving/fixed contacts | mm | 3 | |
| 15 | Contact gap | mm | 11±1 | |
| 16 | Overtravel (contact spring compression length) | mm | 3+1.0 | |
| 17 | Three-pole closing/opening non-simultaneity | ms | ≤2.3 | |
| 18 | Contact closing bounce time | ms | ≤2 | |
| 19 | Average opening speed | m/s | 1.0±0.2 | |
| 20 | Average closing speed | m/s | 0.7±0.15 | |
| Opening time | At maximum operating voltage | 0.015-0.05 | ||
| 21 | At minimum operating voltage | s | 0.03-0.06 | |
| 22 | Closing time | 0.025-0.05 | ||
| 23 | Main circuit resistance | μΩ | ≤120 (≤200 with G) |
Outline & Installation Dimensions
Related Products
Outdoor high-voltage circuit breakers of the same series and other types available:
- ZW32-12(G) Outdoor High-voltage Vacuum Circuit Breaker for Pole-mounted Distribution
- ZW32M(T)-12 Integrated Outdoor Vacuum Circuit Breaker
- ZW32ABG-12 Permanent-magnet Outdoor Vacuum Circuit Breaker
- ZW32-12FG/630A Outdoor Sectionalizing Vacuum Circuit Breaker (Intelligent Sectionalizing Switch)
- ZW20A-12/630A Outdoor High-voltage Vacuum Circuit Breaker
- ZW7-40.5kV/630A Outdoor High-voltage Vacuum Circuit Breaker (35kV Class)
