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Looking for a reliable manufacturing partner? Let us help you scale your business.
Contact SalesBecome a Partner
Looking for a reliable manufacturing partner? Let us help you scale your business.
Contact SalesBecome a Partner
Looking for a reliable manufacturing partner? Let us help you scale your business.
Contact SalesBecome a Partner
Looking for a reliable manufacturing partner? Let us help you scale your business.
Contact Sales
Vacuum Circuit Breaker
Vacuum Circuit Breaker
Product Feature
◆Circuit breaker is composed of operation mechanism,conductive loop,transmission system,insulation system,sealing parts and box. The complete instructure is three-phase common box type.
◆Conductive loop is connected by feeding in and out conductive pole, conductive clamp, flexible link and vacuum arc-extinguished chamber.
◆Inner insulation is fulfilled mainly by three-phase separate insulating box and SF6 gas.Feeding in and out conductor bushing of outer insulation is integrally completed by epoxy resin and silicone rubber to ensure the mechanical strength and electrical insulation performance,moreover, it has features of UV-resistant, anti-pollution, etc.
◆It adopts fully enclosed structure which filled with SF6 gas,has good sealing performance and prevent dewing,suitable for use of high temperature and wet area.
Main Technical Specifications
| Rated voltage | kV | 12 |
| 1 min rated power-frequency withstand voltage (effective value) | kV | Phase to phase:42 Phase to ground:42 Fracture:48 |
| Rated lightning impulse withstand voltage (peak value) | kV | Phase to phase:75 Phase to ground:75 Fracture:85 |
| Rated current | A | 630 |
| Rated frequency | Hz | 50 |
| Rated short-circuit breaking current(effective value) | kA | 12.5 16 20 25 |
| Rated short-circuit making current(peak value) | kA | 31.5 40 50 63 |
| Rated peak withstand current | kA | 31.5 40 50 63 |
| 4s rated short-circuit withstand current (effective value) | kA | 12.5 16 20 25 |
| Rated operation sequence | open-0.3s-close open-180s-close open | |
| Rated short-circuit breaking current breaking times | times | 30 |
| Mechanical life | times | 10000 |
| Second-time circuit 1 min power-frequency withstand voltage | V | 2000 |
| Weight | Kg | 145 |
Main Mechanical Characteristics
| Contact distance | mm | 9±1 |
| Contact ultra travel | mm | 3±1 |
| Contact bouncing time on closing | ms | ≤2 |
| Three-phase non-synchronous opening | ms | ≤2 |
| Average opening speed | m/s | 0.65±0.2 |
| Average closing speed | m/s | 1.2±0.2 |
| Closing time | ms | 30~100 |
| Opening time | ms | 25~60 |
| Central distance of interphase | mm | 275 |
| Main circuit resistance | μΩ | ≤120 |
| SF6 gas pressure | Mpa | 0 |
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