VB85-40.5/T2000-31.5 Indoor High Voltage Vacuum Circuit BreakerDetailed product description：

The VB85-40.5/T2000-31.5 indoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is suitable for use in three-phase AC 50Hz, rated voltage 40.5kV power systems, and can be used for load current, overload current, and fault current in industrial and mining industries, power plants, and substations.
The circuit breaker and operating mechanism are arranged vertically, effectively reducing the depth of the circuit breaker.
The three-phase arc extinguishing chamber and associated charged body are isolated by three independent epoxy resin insulation cylinders, forming a composite insulation structure. The circuit breaker meets the requirements of air distance and creepage distance under normal operating conditions, and effectively reduces the volume of the circuit breaker. The main electrical circuit vacuum arc extinguishing chamber and the dynamic and static conductive connections are installed inside an insulating cylinder, with a phase spacing of only 300mm. All electrical connections in the main circuit are fixed and have high reliability. The insulation cylinder is installed above the circuit breaker frame.
The spring operated mechanism specially designed for this new type of circuit breaker is installed inside the circuit breaker frame, and 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 40.5KV vacuum circuit breakers. The overall layout is reasonable, beautiful, and concise. Compact size, flexible operation, reliable electrical performance, long service life, easy maintenance, and maintenance free mechanism.
This circuit breaker is suitable for frequent operation, various occasions, and places with harsh operating conditions.

Main Technical Parameters of VB85-40.5/T2000-31.5 Indoor High Voltage Vacuum Circuit Breaker

	project	unit	data
	rated voltage	kV	forty point five
	rated current	A	two thousand
	rated frequency	Hz	fifty
	Rated short-circuit breaking current	kA	thirty-one point five
	Rated short-circuit closing current (peak)		eighty
	4s rated short-time withstand current		thirty-one point five
	Rated peak withstand current		eighty
	Short time (1min) power frequency withstand voltage	kV	ninety-five
	Lightning impulse withstand voltage (peak value)		one hundred and eighty-five
	Rated operating sequence		O-0.3S-CO-180s-CO
	Rated short-circuit breaking current breaking times	time	twenty
	mechanical life		ten thousand
	Cut off time	ms	≤80
	Single capacitor group breaking current	A	six hundred and thirty
	Back to back capacitor bank breaking current		four hundred
	Rated operating voltage	V	-110/～110，-220/～220