12KV Vacuum Circuit Breaker

The 12kV vacuum circuit breaker manufactured by DAHU ELECTRIC is the indoor switchgear with rated voltage up to 40.5kV,three phase AC 50/60Hz.It acts as the electrical protective and control device in the power system,especially applicable to locations that need frequent operating in rated current or under repeatedly on/off short circuit current.

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Product Description

This breaker was designed as a unit which gathering actuator and circuit breaker main body.It can be used for fixed mounting unit,also can be constituted as a withdrawable unit through outfit dedicated advancing mechanism.Corresponding interlock can be increased to meet the needs of XGN2,GG1A and other fixed cabinets.Simultaneously,it can coordinate with the KYN28A-12(GZS1) middle-arranged manual-driven switchgear,KYN61-40.5 floor standing switchgear or XGN-fixed switchgear as well.

Product Details

Modular Mechanism

Modular mechanism design, highly standardized structure;

Mechanism is easy to assemble / disassemble and easy to maintain;

High reliability with less number of parts

Integrated charging handle, makes operation convenient and easy

Pot-type Pole

Environment friendly insulating material, PA66 provides light weight, high dielectric performance;

Recyclable and easy disposal after product life cycle;

Cost effective and reliable;

Vacuum Circuit Breaker

Fully meets the requirements of IEC and GB standards;

Complete interlocking, prevent misoperation, and provide safety in operation;

Modular design, shortened delivery time;

Small opening rebound and excellent performance;

Model explanation

VS1 - Product code

12 - 12KV

T - Spring Mechanism; M - Permanent Magnetic Mechanism

630 - 630A

25 - 25kA

W - Withdrawable type; F - Fixed type

150 - 150mm pole distance; 210 - 210mm pole distance; 1000 - 1000mm/1m pole distance

P - Potted type; E - Encapsulted type

Performance Advantage

The product is equipped with a bistable permanent magnet operating mechanism, the mechanism is equipped with a permanent magnet, by the permanent magnet to provide a holding force, so that the switch is maintained in the open and closed state, compared with the conventional spring operating mechanism, the number of mechanical parts is reduced, the mechanical transmission chain is shortened, so that the reliability of the switch is greatly improved, the mechanical life is greatly increased.

Main Technical Specification

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 current	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