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Vacuum circuit breaker, an important electrical component of trunk line locomotives, is the master switch for electrical connection and disconnection between the vehicle and the catenary, as well as the most important protection equipment on the locomotive. When various serious faults occur in the locomotive, it can cut off the master power supply of the locomotive quickly, reliably and safely, thus protecting the safety of locomotives.
Vacuum circuit breaker takes vacuum as insulating medium and arc extinguishing medium, and the arc is extinguished by the deionization effect formed by high insulation strength and arc diffusion ability under vacuum. Its structural characteristics are: single fracture, direct-acting cylinder transmission, electronic control, suitable for various types of trunk line AC 25kV electric locomotives and EMUs.
Main products: 22CB series, 22CBCK series, 22CBDL series, 22CBDP series and 24CB series
1. Mechanical and electrical integration technology
Figure 1 22CB(E)Series Vacuum Circuit Breaker
2.Matching technology of opening and closing characteristics
Figure 2 Closing Process of Vacuum Circuit Breaker
Figure 3 Opening Process of Vacuum Circuit Breaker
3.Short-circuit Current Breaking Technology
Figure 4 Insulator on Vacuum Circuit Breaker
| Rated voltage |
31.5 kV |
| Rated frequency |
50 Hz |
| Rated current |
1000 A |
| Rated short-circuit breaking capacity |
31.5 kV，50 Hz/20 kA |
| Rated short-circuit making capacity |
50 kA(peak) |
| Rated short-time withstand current |
20 kA（1s） |
| Rated peak withstand current |
50 kA |
| Rated control voltage |
DC110 V |
| Air pressure of control circuit |
450 kPa～1000 kPa |
| Rated impulse withstand voltage of main circuit to ground |
185 kV |
Copyright: CRRC Datong Co., Ltd. 2016 JICPB No. 15050284Technical Support: CRRC Information Technology Co., Ltd.
