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ZN105-12/T5000-63 Vacuum Circuit Breaker for Generator

The ZN105-12/T5000-63 vacuum circuit breaker for generator was developed on the basis of the launched ZN65A-12/4000-63 and ZN105-12/6300-80 products as well as the German Siemens's 3AF technology.

This large-capacity circuit breaker integrating large rated current (5,000A) and high breaking capacity (63kA) is applicable to three-phase AC systems with the rated voltage of 12kV and the rated frequency of 50Hz. It is suitable to work as the control and protection switch in power plants and substations.

1. As a generator circuit breaker, our product complies with the GB/T14824-1993 "General Technical Conditions for the Generator Breaker" standard and the DL/T427-1997 "Ordering Technical Conditions for the Indoor Type Generator Breaker" standard.

2. This vacuum circuit breaker for generator adopts the integrated spring energy storage type operating mechanism which can be operated by AC, DC or hand.

3. With advanced and reasonable design, our generator breaker has simple structure, strong breaking ability, long mechanical life, and complete operating functions. It poses no risk of explosion during operation.

4. The air insulation ensures excellent insulation performance and facilitates heat dissipation, enabling the vacuum circuit breaker to fully satisfy the requirement of using in indoor areas with the filthy condition reaching Grade II.

Use Environment
1. Altitude: ≤ 1,000m
2. Ambient Temperature: -15℃~+40℃
3. Relative Humidity: Daily average ≤ 95%, monthly average ≤ 90%
4. Earthquake Intensity: < 8 degree
5. This vacuum circuit breaker for generator should be used in places with no fire, explosion, corrosive gas, or severe shaking.

Technical Parameters
Item Unit Value
Rated Voltage kV 12
Rated Current A 5,000
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 kA 176
Rated Short Circuit Duration s 3
Rated Short-circuit Current Breaking Times times 5
Rated Operating Sequence
Close open -15min- close open
Rated Frequency Hz 50
Lightning Impulse Withstand Voltage (Peak) kV Phase to phase, phase to ground 75
Break 85
1min Power Frequency Withstand Voltage kV Phase to phase, phase to ground 42
Break 48
Closing Time ms 40-65
Opening Time ms 35-65
Breaking Time ms 50-80
Mechanical Life times 10,000
Rated Power of the Energy Storage Motor W 275
Rated Voltage of the Energy Storage Motor V AC DC 220
Energy Storage Time s ≤ 15
Rated Voltage of the Closing and Tripping Electromagnet V DC 220
Rated Current of the Auxiliary Switch A AC10 DC5

BBE is a professional vacuum circuit breaker for generator manufacturer and supplier in China. We also provide indoor single pole vacuum circuit breaker, low voltage circuit breaker for ship, air circuit breaker, and withdrawable switchgear, among others.

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