10kV MV Indoor Vacuum Circuit Breaker/VCB for Switchgear

EX63(VS1)-12kV

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1. General description
VAC63(VS1)1-12 indoor M.V. vacuum circuit breaker is an indoor switchgear with tri-phase AC 50Hz, rated voltage of 12kV, control and protection for industrial and mining enterprises, power plants and substations, electrical facilities and for frequent operation place adopting VET operating mechanism and circuit breaker integrated design can be used as a fixed installation unit can also be equipped with special advance mechanism, the composition of handcart unit used some of the main circuit can use the whole solid seal post with high reliability, maintenance free, in order to achieve smaller circuit breakers, can be equipped with KYN2BA 12(GZS) and other handcart switch cabinet. In the home it can also be used with fixed XGN switchgear.
VAC63 is regular type mechanism, VAC83 is improved on the basis of VAC63. All VAC83 mechanisms can be replaced by VAC63 mechanisms, they are universal mechanism.

2. Main technical parameter

Item	Unit	Data
Rated voltage	kV	12
Rated frequency	Hz	50
Rated insulation level 1 min power frequency withstand voltage pole to earth	kV	42
Rated insulation level 1 min power frequency withstand voltage phase	kV	48
Rated insulation level lightning impulse withstand voltage pole to earth	kV	75
Rated insulation level lightning impulse withstand voltage phase	kV	85
Power frequency withstand voltage of secondary circuit	V	2000
Rated current①	A	630,1250, 1600, 2000, 2500, 3150, 4000, 5000
Rated short-circuit breaking current	kA	20, 25, 31.5, 40, 50
Rated short-time withstand current	kA	20, 25, 31.5, 40, 50
Rated short circuit duration	s	4
Rated peak withstand current	kA	50, 63, 80, 100, 125
Rated short-circuit making current	kA	50, 63, 80, 100, 125
Rated short circuit current breaking times (class E2)	times	30
Rated single/back to back capacitor bank breaking current	A	630/400, 800/400
Clearance between open contacts	mm	11±1
Contact stroke	mm	3~4
Allowable wear thickness of contact	mm	3
Average opening speed	m/s	0.9~1.4
Average closing speed	m/s	0.5~1.0
Contact closing bounce time	ms	≤2
Different phases of contact closing and opening	ms	≤2
Rebound amplitude of opening contact	mm	≤2
Opening time (rated voltage)	ms	20~50
Closing time (rated voltage)	ms	30~70
Mechanical life (M2)	ms	10,000(20,000)
Rated operating voltage	V	AC110/220 DC110/220
Rated operation sequence		O-0-CO-180s-CO

①It is forced cold air when rated current is 4000A

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