ZN85-40.5kV Indoor Handcart Vacuum Circuit Breaker | Reliable High Voltage Protection

ZN85-40.5 indoor high-voltage vacuum breaker (hereinafter referred to as the circuit breaker) is suitable for three-phase AC 50Hz, rated voltage 40.5KV power systems. It can be used for industrial and mining enterprises, power plants and substations as a switching load current, overload current, For fault current purposes. The circuit breaker and operating mechanism are arranged in an upper and lower structure, which effectively reduces the depth of the circuit breaker. The three-phase arc extinguishing chamber and associated live bodies are isolated by three independent epoxy resin insulating cylinders, forming a composite insulation structure. The circuit breaker meets the air distance and creepage distance requirements under normal operating conditions, and effectively reduces the The volume of the circuit breaker. The vacuum arc extinguishing chamber of the main conductive circuit and the dynamic and static conductive connections are installed in the insulating cylinder, so that the phase distance is only 300mm.

Request For Quote Related Products

Feature

All main circuit electrical connections are fixed connections, which are highly reliable.

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. Its structural characteristics are more suitable for the upper and lower layout 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 the 40.5kV vacuum circuit breaker.

The overall layout is reasonable, beautiful and concise. It is small in size and flexible in operation. It has the characteristics of reliable electrical performance, long service life, convenient maintenance and maintenance-free mechanism.

Parameter

project	unit	data
Rated voltage	KV	40.5
Rated current	A	1250 1600 2000
Rated frequency	Hz	50
Rated short circuit breaking current	KA	25	31.5
Rated short-circuit closing current (peak value)	KA	63	80
4s rated short-time withstand current	KA	25	31.5
Rated peak withstand current	KA	63	80
1min power frequency withstand voltage	KV	95

project	unit	data
Lightning impulse withstand voltage (peak value)	KV	185
Rated operating sequence		0-0.3s-CO-180s-CO
Rated short circuit breaking current breaking times	Second-rate	20
Mechanical life	Second-rate	10000
Breaking time	ms	≤80
A single capacitor breaks the current	A	630
Back-to-back capacitor bank breaking current	A	400
Rated operating voltage	V	-110/~110,-220/-220