BD-12/1250-20 Glass vacuum arc extinguishing chamber-[Quotation-data]--Shanghai Huabang Industrial Business-www.91way.com

Product name：

BD-12/1250-20 Glass vacuum arc extinguishing chamber

specification：

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Category：

spare parts and accessories -- Glass arc extinguishing chamber

Price：

factory price

Brand：

Shanghai

Place of Origin：

China

Available Quantity：

batch

delivery cycle：

Spot goods (or inquire by telephone)

Shanghai Beiyuan Industry and Trade Co.,Ltd
+86-21-66770508
+86-139101609058

91way@163.com
13916500500(Wechat)

BD-12/1250-20 Glass vacuum arc extinguishing chamberDetailed product description：

Overview
The glass vacuum arc extinguishing chamber for BD-12/1250-20 circuit breaker adopts a medium sealed structure, glass shell, CuCr50 alloy contacts, cup-shaped longitudinal magnetic structure, with the characteristics of large current breaking capacity, high insulation level, strong arc extinguishing ability, long service life, small size, simple maintenance, no explosion hazard, no pollution, low noise, etc. The outdoor vacuum circuit breaker assembled with it is used for control and protection in power transmission and distribution systems such as industrial and mining, enterprises, and substations.

Main technical parameters

Parameter Name Parameter name	unit Unit	numerical value Value
Rated voltage	kV	twelve
Rated normal current	A	one thousand two hundred and fifty
Rated short circuit breaking current	kA	twenty
Rated short circuit making current	kA	fifty
Rated peak withstand current	kA	fifty
Rated short-time withstand current	kA	twenty
Rated duration of short circuit	S	four
Rated single capacitor unit breaking current	A	six hundred and thirty
Rated back-to-back capacitor bank breaking current Rated back to back capacitor unit breaking current	A	four hundred
Rated short-time (1min) power frequency withstand voltage Rated short time power frequency withstand voltage (1min)	kV	forty-two
Circuit resistance under rated contact pressure Circuit resistance at lower limit of rated contact pressure	μΩ	≤30
Rated short-circuit breaking current breaking times Rated short circuit breaking current breaking times	Next time	thirty
Rated lightning impulse withstand voltage Rated lightning impulse withstand voltage	kV	seventy-five
Mechanical endurance	Next time	ten thousand
Closing force due to bellows and atmosphere	N	120±50
Contact reaction force at rated opening distance Force required to hold contacts open at full stroke	N	200±50
Contact wear allowance thickness	mm	three
Internal gas pressure	Pa	≤1.33×10ˉ^three
Allow storage period	Year year	twenty

Mechanical parameters of glass vacuum arc extinguishing chamber for circuit breaker BD-12/1250-20

Project	unit Unit	numerical value Value
Contact stroke distance	mm	11±1
Contact travel	mm	3.5±0.5
Average closing speed	m/s	0.6±0.2
Average opening speed	m/s	1.1±0.2
Rated contact pressure	N	2000±200
Contact closing bounce time	ms	≤2
Non synchronous closing and opening of contacts Out of simultaneity of contact closing and opening	ms	≤2

Glass vacuum arc extinguishing chamber for circuit breaker BD-12/1250-20

BD-12/1250-20 Glass vacuum arc extinguishing chamber（schematic diagram）