BD-12/1250-25 Glass vacuum arc extinguishing chamber-[Quotation-data]--Shanghai Huabang Industrial Business-www.91way.com

Product name：

BD-12/1250-25 Glass vacuum arc extinguishing chamber

specification：

Zoom in on the image

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-12/1250-25 Glass vacuum arc extinguishing chamberDetailed product description：

Overview
The glass vacuum arc extinguishing chamber for BD-12/1250-25 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. Product Description

Main technical parameters of glass vacuum arc extinguishing chamber for circuit breaker BD-12/1250-25

Parameter Name Parameter name	unit Unit	numerical value Value
rated voltage Rated voltage	kV	twelve
rated current Rated normal current	A	one thousand two hundred and fifty
Rated short-circuit breaking current Rated short-circuit breaking current	kA	twenty-five
Rated short-circuit closing current Rated short-circuit making current	kA	sixty-three
Rated peak withstand current Rated peak withstand current	kA	sixty-three
Rated short-time withstand current Rated short-time withstand current	kA	twenty-five
Rated short-circuit duration Rated duration of short circuit	S	four
Rated breaking current of a single capacitor bank 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	time time	thirty
Rated lightning impulse withstand voltage Rated lightning impulse withstand voltage	kV	seventy-five
mechanical life Mechanical endurance	time time	ten thousand
Contact self closing force Closing force due to bellow and atmosphere	N	120±50
Contact reaction force at rated opening distance Force required to hold contacts open at full stroke	N	200±50
Allowable wear thickness of contacts Contact-wear allowance thickness	mm	three
Internal gas pressure Internal gas pressure	Pa	≤1.33×10ˉ^three
Allowable storage period Storage period	year year	twenty

Mechanical parameters for using circuit breakers

project Project	unit Unit	numerical value Value
contact gap Contact stroke	mm	11±1
Contact stroke of contacts Contact travel	mm	3.5±0.5
Average closing speed Average closing speed	m/s	0.6±0.2
Average opening speed Average opening speed	m/s	1.1±0.2
Rated contact pressure Rated contact pressure	N	2500±200
Contact closing bounce time 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-12/1250-25

BD-12/1250-25 Glass vacuum arc extinguishing chamber（schematic diagram）