- Contact Person : Ms. Wang Grace
- Company Name : Beijing Huadong Electric Co., Ltd.
- Tel : 0086-10-67668022
- Fax : 0086-10-87697121
- Address : Beijing,Beijing,Room 408, B unit, No.1 building, No.16, Ronghua South Road, Beijing Economy technologyl developed area,Beijing.
- Country/Region : China
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VH4 Series vacuum circuit breaker is a kind of indoor switchgear used in electric power system. It works as protection and control unit for power grid equipment and power equipment in industrial and mining enterprises. It is a new generation of high quality vacuum circuit breaker developed by Beijing Huadong Electric Co.,Ltd. specifically for nuclear power projects. Main circuit of the circuit breaker may adopt fixed sealing type arc quenching chamber pole(pole that adopts special technique to envelop vacuum arc quenching chamber and conductive connecting piece using epoxy resin)made by Siemens, and may also adopt open type arc quenching chamber pole made by our company. Its mechanism adopts long life and high reliable modular spring operating mechanism made by our company.
Model VH4-EP circuit breaker is one of our company's Model VH4 series of high voltage vacuum circuit breakers. Its main circuit adopts fixed sealing type vacuum arc quenching chamber imported from Geman Siemens in original package. Arc quenching chamber and conductive connecting rod etc parts are cast into pole using epoxy resin by means of special technique, which reduces assembly link, increases mechanical reliability greatly. at the same time, increases external creepage distance, and guarantees the high reliabilities of electric performance in all kinds of harsh environments.
Technical Parameters of VH4 24KV VCB
Serial No. | Items | Unit | Technical Data | ||||||
1 | Rated Voltage | KV | 24 | ||||||
2 | Rated Frequency | HZ | 50/60 | ||||||
3 | Rated Insulation Level | 1 min Rated Power Frequency withstand Voltage | KV | 65 | |||||
Rated Lightning Pulse withstand Voltage | KV | 125 | |||||||
4 | Rated Current | A | 630 | 1250 | 1600 | 2000 | 2500 | ||
5 | Rated Short Circuit Breaking Current Rated Short time Withstand Current (4s) | KA
| 20 | 20 | 25 | ||||
25 | 25 | 31.5 | 31.5 | 31.5 | |||||
6 | Rated Short Circuit Makeup current (peak) Rated Peak Withstand Current | KA | 50 | 80 | 80 | 80 | 80 | ||
63 | 80 | 80 | 80 | 80 | |||||
7 | Rated Short Circuit Current Breaking Times | Times | 20 | ||||||
8 | Operation squence | 0-0.3s-CO-180s-CO | |||||||
9 | Closing Time | ms | 50±15 | ||||||
10 | Opening Time | ms | 40±15 | ||||||
11 | Energy Storage time | s | ≤15 | ||||||
12 | Mechanical Life | Times | 10000 | ||||||
13 | Rated Power of Energy Storage Motor | W | 200 | ||||||
14 | Rated Voltage of Energy Storage Motor | V | --110 --220 | ||||||
15 | Rated Voltage of Opening and Closing Electromagnet | -110 -220 | |||||||
16 | Rated Current of Opening and Closing Electromagnet | A | DCO.91 DCO.89 | ||||||
17 | Rated Current of Over current Trip Device | A | 5 | ||||||
18 | Rated Current of Auxiliary switch | A | AC10, DC5 | ||||||
VH4 series 24KV Vacuum circuit breaking