1.vacuum circuit breaker
2.Reliable and maintenance free
3.Long service life,non exploration
4.Short delivery time

    ZN85-40.5 type indoor high voltage vacuum circuit breaker is appropriate to 40.5kv,50Hz three phase current system, applicable to break loading current ,over load current ,fault current in mining industrial enterprise, power station, transformer substation. The layout of circuit breaker and operating mechanism are assembled up and down, which reduced the depth of circuit breaker effectively. Three poles interrupter and jointed charged body are isolated by epoxy resin insulator. This composite isolate structure meets the requirement of air and creepage distance and decreased the circuit breaker volume. Main conductive circuit ,vacuum interrupter, moving and fixed conductive joint are mounted in the cylinder, which makes the distance of each pole is only 300mm.Main circuit electrical joints are reliable all fixed joint. Specialized designed spring operating structure is fixed in the frame of circuit breaker. This simple design makes the output curve and performance greatly matches to 40.5kv circuit breaker. The overall layout is reasonable, simple and free of maintain. It can be used in frequent and harsh operating condition.

 Ambient condition

1 Ambient temperature: max +40°C min -15°C(conveyance under -30°C is allowed)

2 Altitude: ≤1000m

3 Relative humidity: daily average relative humidity: ≤95%; monthly average relative humidity≤90%, daily average saturated vapor pressure ≤2.2*10-3 MPa,monthly average value   ≤1.8*10-3 MPa

4 Earthquake intensity: ≤8 degree

5 The installation should be free from fire, explosion, severe vibration, chemical corrosion and serious pollution

Order instruction

Complete model and order quantity of the product

Rated current, rated voltage, rated short circuit breaking current

Rated voltage of operation mechanism open and close release, rated voltage of energy saving motor   

Required accessory and quantity

Other requirement please contact with us directly