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ZN12-40.5 Indoor Vacuum Circuit Breaker

The ZN12-40.5 indoor vacuum circuit breaker is a three-phase AC 50Hz high voltage switching device with the rated voltage of 40.5kV. It is produced on the basis of the 3AF technology imported from German Siemens.

This indoor vacuum circuit breaker passed the appraisal of former national Ministry of Machinery and Ministry of Electric Power in August 1996. It adopts the integrated design of operating mechanism and switch body. A specialized spring energy storage type operating mechanism is used and the energy storage operation can be completed manually or electrically (AC or DC).

Our product features simple structure, strong breaking ability, complete operating functions, long service life, no explosion hazard, and easy maintenance. It is suitable to be used as the control or protection switch for the power transmission and distribution systems of substations or power plants. To break important loads and for occasions requiring frequent operations, this indoor vacuum circuit breaker is certainly an ideal choice.

Environmental Conditions
1. Altitude: ≤1,000m
2. Ambient Temperature: -25℃~+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 risks of fire or explosion, no corrosive gas, and no severe shaking.

Technical Parameters
Item Unit Value
Rated Voltage kV 40.5
Rated Current A 1250 1600 2000 2500
Rated Short-circuit Breaking Current kA 25 31.5
Rated Peak Withstand Current kA 63 80
4s Thermal Stable Current kA 25 31.5
Rated Short-circuit Closing Current (Peak Value) kA 63 80
Rated Short-circuit Current Breaking Times times 20
Rated Operating Sequence
Open- 0.3s-close open-180s- close open
Rated Lightning Impulse Withstand Voltage (Full Wave) kV 185
Rated short-time power frequency withstand voltage (1min) kV 95
Closing Time s ≤ 0.09
Opening Time s ≤ 0.075
Mechanical Life times 10000
Rated Current Breaking Times times 10000
Power of the Energy Storage Motor W ~275
Rated Voltage of the Energy Storage Motor V ~110 220
Energy Storage Time s ≤ 15
Rated Voltage of the Closing Electromagnet V =110 220
Rated Voltage of the Opening Electromagnet V =110 220
Rated Current of the Over-current Release A 5
Rated Current of the Auxiliary Switch A AC10 DC5

BBE is a professional indoor vacuum circuit breaker manufacturer and supplier in China. We offer a wide range of products, including outdoor single pole vacuum circuit breaker, high voltage vacuum contactor, withdrawable switchgear, and more.

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