ZN85-40.5 INDOOR HIGH VOLTAGE VACUUM CIRCUIT BREAKERS

Short Description:

ZN85-40.5 series indoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker), suitable for three-phase AC 50Hz, rated voltage 40.5kV power system, can be used for industrial and mining enterprises, power plants and substations as switching load current, overload current, fault current.The circuit breaker and the operating mechanism are arranged up and down, which effectively reduces the depth of the circuit breaker.The three-phase arc extinguishing chamber and the connected live body are separated by three independent epoxy resin insulation cylinders to form a composite insulation structure. The circuit breaker meets the requirements of air distance and creepage distance under normal operating conditions, and effectively reduces the disconnection. The volume of the device. The vacuum interrupter of the main conductive circuit and the static and dynamic conductive connection are installed in the insulating cylinder, so that the distance between them is only 300mm. The electrical connections of the main circuit all adopt fixed connections, which have high reliability.The insulating cylinder is installed above the circuit breaker frame.The spring operating mechanism specially designed for this new type of circuit breaker is installed in the circuit breaker frame, and its structural characteristics are more suitable for the up and down arrangement of the circuit breaker, and become an integral part of the overall structure of the circuit breaker. The mechanism design is simple, and the output curve and its performance are more suitable for the characteristics and requirements of 40.5kV vacuum circuit breakers.The overall layout is reasonable, beautiful and concise. Small size, f lexible operation, reliable electrical performance, long service life, convenient maintenance, and maintenance-free mechanism. The circuit breaker is suitable for frequent operation and many occasions and places with harsh operating conditions.

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Product Overview
ZN85-40.5 series indoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker), suitable for three-phase AC 50Hz, rated voltage 40.5kV power system, can be used for industrial and mining enterprises, power plants and substations as switching load current, overload current, fault current.

The circuit breaker and the operating mechanism are arranged up and down, which effectively reduces the depth of the circuit breaker.

The three-phase arc extinguishing chamber and the connected live body are separated by three independent epoxy resin insulation cylinders to form a composite insulation structure. The circuit breaker meets the requirements of air distance and creepage distance under normal operating conditions, and effectively reduces the disconnection. The volume of the device. The vacuum interrupter of the main conductive circuit and the static and dynamic conductive connection are installed in the insulating cylinder, so that the distance between them is only 300mm. The electrical connections of the main circuit all adopt fixed connections, which have high reliability.The insulating cylinder is installed above the circuit breaker frame.

The spring operating mechanism specially designed for this new type of circuit breaker is installed in the circuit breaker frame, and its structural characteristics are more suitable for the up and down arrangement of the circuit breaker, and become an integral part of the overall structure of the circuit breaker. The mechanism design is simple, and the output curve and its performance are more suitable for the characteristics and requirements of 40.5kV vacuum circuit breakers.

The overall layout is reasonable, beautiful and concise. Small size, f lexible operation, reliable electrical performance, long service life, convenient maintenance, and maintenance-free mechanism. The circuit breaker is suitable for frequent operation and many occasions and places with harsh operating conditions.
Main Technical Parameters

Item	Unit	Data
Rated voltage	kV	40.5
1 min Power frequency withstand voltage (valid value)	kV	95
Lightning impulse withstand voltage (peak)	kV	185
Rated frequency	Hz	50
Rated current	A	1250, 1600, 2000
Rated short-time withstand current	kA	25, 31.5
Rated peak withstand current	kA	63, 80
Rated short circuit duration	s	4
Rated short-circuit breaking current	kA	25, 31.5
Rated short circuit switching current	kA	63, 80
Rated operation sequence		O-0.3s-CO-180s-CO
Breaking duration	ms	<80
Rated short circuit breaking current breaking times	Times	20
Single capacitor bank breaking current	A	630
Single capacitor bank breaking current	A	400
rated operation voltage	V	AC110, 220; DC110,220
Mechanical life	Times	10000