40.5KV Outdoor Vacuum Circuit Breaker, ZW7-40.5

This outdoor vacuum circuit breaker is used in AC power systems with rated voltage of 40.5KV and frequency of 50Hz. Designed with spring operating mechanism or electromagnetic operating mechanism, the circuit breaker can be remotely controlled for electrical opening and closing operation, and manually controlled for energy storing, as well as manual opening and closing operation.

These outdoor vacuum circuit breakers are mainly used to control and protect 35Kv outdoor transmission and distribution systems, aiming at guaranteeing the normal operation of power distribution networks in cities, rural areas, industrial and mining enterprises, protecting against short-circuit current. They are non-combustible, non-explosive, and characterized by excellent sealing, anti-aging performance, high voltage resistance, long lifespan, easy installation and maintenance.

40.5KV outdoor vacuum circuit breaker is certified in accordance with the requirements of standard IEC- 56 High-Voltage Alternating-Current Circuit-Breakers.

Environmental Conditions Ambient temperature: up to 40°C, greater than -30°C; Altitude: 2000 m (rated insulation level needs to be increased accordingly if the altitude is increased); Wind pressure: ≤ 700Pa (equivalent to wind speed of 34m/s); Earthquake intensity: ≤ magnitude 8; Pollution level: III; Max. temperature variation: does not exceed 25°C Features Vacuum arc-extinguishing, strong capacity of breaking and closing, long service life, mechanical lifespan 10000 times; Simple structure, maintenance free operation, long overhaul intervals; Good insulation performance and pollution resistance; Configurable with spring operating mechanism or electromagnetic operating mechanism, reliable mechanical performance, frequent operations, no risks of fire and explosion; Built-in current transformer, accuracy reaches Class 0.2, achieving three-phase protection; Built-in control to prevent condensation, ensuring reliable operation of circuit breaker under a certain temperature and humidity range; Technical Parameters

Item	Unit	Parameters
Rated voltage	kV	40.5
Power frequency withstand voltage (dry)	kV	95
Power frequency withstand voltage(wet)	kV	80
Lightning impulsewithstand voltage(peak)	kV	185
Rated current	A	1250, 1600, 2000
Rated short-circuit breaking current	kA	20, 25, 31.5
Rated operating sequence	C-0.3sOC-180sOC
Rated short-circuit making current(peak)	kA	50, 63, 80
Rated peak withstand current	kA	50, 63, 80
Short-time withstand current	kA	20, 25, 31.5
Mechanical endurance	times	10000
Weight	kg	800