The ZN85-40.5 series indoor high-voltage vacuum circuit breaker issuitable for three-phase AC 50Hz, rated voltage of 40.5kV powersystems, and can be used for industrial and mining enterprises,power plants, and substations for switching load currents, overloadcurrents, and fault currents.The circuit breaker and the operating mechanism adopt an upperand lower arrangement structure, effectively reducing the depth ofthe circuit breaker;
This new type of circuit breaker uses a specially designed springoperating mechanism, installed inside the circuit breaker frame. ltsstructural characteristics are more suitable for the upper and lowerarrangement of the circuit breaker and become an integral part of thecircuit breaker’s overall structure. The mechanism is designed to besimple, and its output curve and performance are more suitable forthe characteristics and requirements of 40.5kV vacuum circuitbreakers;
The overall layout is reasonable, beautiful, and concise, with acompact size and flexible operation. lt has the characteristics ofreliable electrical performance, long service life, convenientmaintenance,and maintenance-free mechanism;This circuit breaker is suitable for frequent operations and variousoccasions with harsh operating conditions.
Ambient condition
Altitude:≤1000m;
Ambient air temperature: Upper limit +40°C, lower limit -25°C.Relative humidity: Daily average ≤95%, monthly average ≤90%;Installation location: Should be free from fire, explosion hazard, severe pollution, chemical corrosion, and intense vibration, etc.
