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ZN65A-40.5/T2000-31.5 Indoor Vacuum Circuit Breaker

The ZN65A-40.5/T2000-31.5 indoor vacuum circuit breaker is a type of high-voltage electrical equipment with the rated voltage of AC 40.5kV and the rated frequency of 50Hz. Its prominent feature is that its mechanical life reaches 120,000 times.

This indoor vacuum circuit breaker is suitable to work as the control and protection switch for the power transmission and distribution systems in substations as well as industrial and mining enterprises. It is particularly suitable for metallurgy, arc steel making and other fields that require frequent operations.

1. This high voltage circuit breaker has a simple structure. It adopts a spring operating mechanism which has complete operating functions and can be manually or electrically (AC or DC) operated.

2. The product is easy to maintain and there is no risk of explosion.

3. To prolong the mechanical life of the indoor vacuum circuit breaker, effective measures have been taken in the design, parts selection, surface treatment, and other aspects. For example, the spherical contact form is adopted for the connection of vacuum tube and upper outgoing line, making the force exerted on the vacuum interrupter more reasonable. Surface of the axle pin and other components have been specially processed, making them more wearproof.

After a series of improvement measures, the mechanical life of our indoor vacuum circuit breaker reaches 120,000 times. This is the first vacuum circuit breaker with such a long mechanical life in China.

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

Technical Parameters
Item Value
Rated Voltage kV 40.5
Lightning Impulse Withstand Voltage (Peak) kV 185
1min Power Frequency Withstand Voltage kV 95
Rated Frequency Hz 50
Rated Current A 2000
Rated Short-circuit Breaking Current kA 31.5
Rated Short-time Withstand Current kA 31.5
Rated Peak Withstand Current kA 80
Rated Short Circuit Duration s 4
Rated Short Circuit Breaking Time ms ≤90
Rated Short-circuit Closing Current kA 80
Rated Operating Sequence Open-0.3s-close open-180s-close open
Closing Time ms 50~80
Opening Time ms 40~85
Rated Short-circuit Current Breaking Times 20
Mechanical Life (times) 120,000
Rated Capacitor Bank Breaking Current A 630
Rated Power of the Energy Storage Motor W 275
Rated Voltage of the Energy Storage Motor V 220, 110
Energy Storage Time s ≤15
Rated Voltage of the Closing and Opening Electromagnet V 220, 110
Rated Voltage of the No-voltage Release V 220, 110
Rated Current of the Over-current Release A 5
Rated Current of the Auxiliary Switch A AC 10 DC 5

BBE is an experienced indoor vacuum circuit breaker manufacturer and supplier in China. Apart from indoor vacuum circuit breaker, we also offer high voltage circuit breaker, withdrawable switchgear, high voltage vacuum contactor, and more.

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