BD-12/2000-31.5 Vacuum arc extinguishing chamberDetailed product description：

Overview:

The BD-12/2000-31.5 vacuum arc extinguishing chamber is a miniaturized product that uses copper chromium contact material, cup-shaped longitudinal magnetic field structure, glass insulation surgery, and a middle sealed fixed shielding cylinder. The product has the characteristics of small size, large breaking capacity, and high pressure resistance. Paired with corresponding indoor and outdoor vacuum circuit breakers, it can be widely used in places where circuits are frequently operated in industrial sectors such as power, machinery, chemical, metallurgical, and mining.

Main technical parameters of BD-12/2000-31.5 vacuum arc extinguishing chamber

parameter item	unit	parameter
rated voltage	kV	twelve
rated current	A	two thousand
rated frequency	Hz	fifty
Short term (1-minute) power frequency withstand voltage	kV	forty-two
Lightning impulse withstand voltage	kV	seventy-five
Rated short-circuit breaking current	kA	thirty-one point five
Rated peak withstand current	kA	eighty
Rated short-circuit closing current	kA	eighty
Rated short-time withstand current	kA	thirty-one point five
Rated short-circuit duration	S	four
Rated breaking current of a single capacitor bank	A	six hundred and thirty
Rated back-to-back capacitor bank breaking current	A	four hundred
Rated operating sequence		Fen-0.3 (0.5) S-HeFen-180S-HeFen
Rated short-circuit breaking current breaking times	time	thirty
mechanical life	time	ten thousand
Contact self closing force	N	200±60
Contact reaction force	N	300±60
Circuit resistance at lower limit of rated contact pressure	uΩ	≤25
Thickness of allowable wear of contacts	mm	three
Gas pressure inside the vacuum arc extinguishing chamber	Pa	≤1×10
Quality of the sports section	kg	two point one
Quality of vacuum arc extinguishing chamber	kg	five point three