ZN85 Indoor High-Voltage Vacuum Circuit Breaker

You can rest assured to buy ceho  ZN85 Indoor High-Voltage Vacuum Circuit Breaker from our factory.The ZN85-40.5 series indoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is suitable for three-phase AC 50Hz power systems with a rated voltage of 33kV/40.5kV. ZN85 Indoor High-Voltage Vacuum Circuit Breaker is used in industrial and mining enterprises, power plants, substations, and other locations for switching load current, overload current, and fault current. The circuit breaker and its operating mechanism adopt a vertical layout, effectively reducing the depth of the circuit breaker.

The three-phase interrupter and its related charged parts are isolated by three independent epoxy resin insulation cylinders to form a composite insulation structure. During normal operation, the circuit breaker can meet the requirements of air gap and creepage distance, and the overall size is significantly reduced. The main conductive circuit components (vacuum interrupter and dynamic/static conductive connections) are installed in insulating cylinders with a phase spacing of only 300 mm. All electrical connections in the main circuit are fixed connections and insulating cylinders are mounted above the breaker frame.

In the frame of the circuit breaker, a special spring operating mechanism is installed. The structural characteristics of ZN85 Indoor High-Voltage Vacuum Circuit Breaker are particularly suitable for vertical arrangement of circuit breakers. The design principle of the mechanism is simple, and the output curve and performance are optimized according to the characteristics and requirements of 33kV/40.5kV vacuum circuit breaker.

The overall layout of ZN85 Indoor High-Voltage Vacuum Circuit Breaker is reasonable, aesthetically pleasing, and simple. Its compact structure, flexible operation, reliable electrical performance, long service life, convenient maintenance, and maintenance-free mechanical structure make it an ideal choice for frequent operation and demanding applications or working conditions.

Product Parameters

Related Notes

Normal operating conditions:

◆ Ambient temperature: below 40℃; daily average temperature: below 35℃; minimum ambient temperature: -15℃;

◆ Relative humidity: daily average ≤95%; monthly average ≤90%;

◆ Daily average water vapor pressure ≤2.2kPa; monthly average ≤1.8kPa;

◆ Altitude: below 1000m;

◆ Surrounding environment: It is necessary to confirm that there is no obvious dust, smoke, corrosive or flammable gas, steam or salt mist pollution;

◆ External vibrations or ground movements affecting switchgear and control equipment are negligible;

◆ The electromagnetic interference amplitude induced in the secondary system shall not exceed 1.6kV;

◆ Special service conditions: If it is installed at an altitude of more than 1000 meters, the ambient air temperature exceeds the normal service conditions, or it is easy to condense due to high humidity, please contact us for customization.