Model Number

VCBI-12/630-20

■General

      VCBI series high-voltage vacuum circuit breaker is a kind of indoor high-voltage switch equipment with 50Hz three-phase alternating current and 12Kv rated voltage, which combined the technique of the ABB Corporation in Switzerland and domestic development state and manufacturing capability. The general framework of this product is taken the form combined the front body and operation system into one.

Because it adopted the composite insulated material, there is no pollution and explosion danger,  the insulation level is high.

■Technical parameter

Serial number	Item			Unit	Data
					31.5kA	40kA	50kA
1	Rated voltage			kV	12
2	Maximum working voltage			kV	12
3	Rated current			A	1250,1600 2000,2500	1250,1600 2500,3150	1250,2500 3150
4	Rated short-circuit break current			kA	31.5	40	50
5	Rated short-circuit close current (peak value)			kA	80	100	125
6	Rated peak value withstand current			kA	80	100	125
7	4S Rated little withstand current			kA	31.5	40	50
8	Rated in sudation level		Industrial frequency withstand voltage	kV	45(fracture 84)
			Thunder impulse withstand voltage		75(fracture 84)
9	Rated operation order				Off-0.3S on and off-180S-on and off
10	Mechanical life-span			Times	10000
11	Rated short-circuit current break and close time			Times	50
12	Speak and move organization amount equal to the voltage of the floodgate (DC)			V	110,220
13	Speak and move organization amount assign the current of the floodgate (DC)			V	110,220
14	Switching distance of the contact			mm	11±1
15	Ultra journey (touches the head spring and compress length)			mm	4±0.5
16	Three-phase breaking into 、shut floodgate sex of the same period			ms	≤2
17	Touch the head and shut a floodgate of time of bouncing			ms	≤2
18	Average speed of breaking brake			M/s	0.9~1.2
19	Average speed of closing brake			M/s	0.6~0.8
20	Time of breaking brake	Operate it under the voltage highest		S	≤0.05
		Operate it under the voltage the most low			≤0.08
21	Time of closing brake			S	≤0.1
22	Each the resistance of main return circuit			μΩ	≤40
23	Allowance abrasion cumulated thickness of the moving and stationary contact			mm	3