According to the situation of control and protection circuit breaker for large-capacity load depending on imports in our power industry, our company developed this ZN105-18/T6300-63 vacuum circuit breaker for generator protection in 2008 by digesting and absorbing the German Siemens's 3AF technology imported in 1983. The rated current and rated short-circuit breaking current of this large-capacity circuit breaker are 6,300A and 63kA, respectively.
Features
1. With the rated voltage and frequency of 18kV and 50Hz respectively, this indoor AC high voltage switching device reaches the international advanced level in technical performance and it fills in the blank of domestic vacuum circuit breaker in this parameter level.
2. This vacuum circuit breaker for generator adopts the integrated design of operating mechanism and switch. The specialized spring energy storage type operating mechanism can be operated by AC, DC or hand.
3. With strong breaking capability, complete operating functions, long mechanical life, no explosion hazard and other advantages, this indoor circuit breaker is suitable to work as the control or protection switch in power plants, large-scale substations, as well as industrial and mining enterprises.
4. Our vacuum circuit breaker has excellent insulation property. It can fully meet the using requirement in indoor areas with the filthy condition of Grade II.
Conditions of Use Environment
1. Altitude: ≤2,000m
2. Ambient Temperature: -25℃~+40℃
3. Relative Humidity: Daily average≤95%, monthly average≤90%
4. Earthquake Intensity: <8degree
5. The vacuum circuit breaker for generator should be used in places without fire, explosion, corrosive gas, or severe shaking.
| Item | Unit | Value | |
| Rated Voltage | kV | 18 | |
| Rated Current | A | 6300 | |
| Rated Short-circuit Breaking Current | kA | 63 | |
| Rated Peak Withstand Current | kA | 176 | |
| Rated Short-time Withstand Current | kA | 63 | |
| Rated Short-circuit Closing Current (Peak) | kA | 176 | |
| Rated Short Circuit Duration | S | 2 | |
| Rated Short-circuit Current Breaking Times | 5 | ||
| Rated Operating Sequence | Close open -15min- close open | ||
| Rated Frequency | Hz | 50 | |
| Lightning Impulse Withstand Voltage (Peak) | Phase to phase, phase to ground | kV | 100 |
| Vacuum break | kV | 115 | |
| 1min Power Frequency Withstand Voltage | Phase to phase, phase to ground | kV | 53 |
| Vacuum break | kV | 63 | |
| Closing Time | ms | 40-65 | |
| Opening Time | ms | 35-65 | |
| Breaking Time | ms | 50-80 | |
| Mechanical Life | times | 4000 | |
| Rated Power of the Energy Storage Motor | W | 550 | |
| Rated Voltage of the Energy Storage Motor | V | ≈ 220 | |
| Energy Storage Time | s | ≤15 | |
| Rated Voltage of the Closing and Tripping Electromagnet | V | 220 | |
| Rated Current of the Closing and Tripping Electromagnet | A | Closing: 2 Opening: 3 |
|
| Rated Current of the Auxiliary Switch | A | AC10 DC5 | |
| Rated Out-of-step Breaking Current | kA | 31.5 | |
| Rated Load Opening and Closing Times | times | 50 | |
| DC Component of the Rated Asymmetrical Breaking Current | % | Average: 67 Maximum: 69 |
|
| DC Component of the Rated Out-of-step Asymmetrical Breaking Current | % | 50~60 | |
BBE is an experienced vacuum circuit breaker for generator manufacturer and supplier in China. We provide a wide array of products, including high voltage circuit breaker, low voltage circuit breaker, gas insulated switchgear (GIS), high voltage vacuum contactor, and more.
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ZN105-18/T6300-63 Vacuum Circuit Breaker for Generator
