40.5KV Vacuum Circuit Breaker

The 40.5kV vacuum circuit breaker manufactured by DAHU ELECTRIC is suitable for three-phase AC 50Hz, 40.5kV system. It can be used for industrial and mining enterprises, power plants and substations as switching load current, overload current fault current, and is suitable for frequent operation occasions. This circuit breaker adopts up and down arrangement structure, which effectively reduces the depth of the circuit breaker. And adopt composite insulation structure, three-phase arc extinguishing chamber and associated charged body separated by three independent epoxy resin insulation shells.

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Product Description

After using composite insulation structure, the circuit breaker meets the requirements of air distance and creep distance under normal operating conditions And effectively reduce the volume of the circuit breaker, the main conductive loop vacuum interrupter and the dynamic and static conductive connection are installed in the insulating cylinder, so that the phase is only 300mm. The main circuit electrical connections are all fixed connections with high reliability.

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;

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

project		unit	Parameter
Rated voltage		kV	40.5
Rated current		A	1250		1600	2000、2500
Rated short-circuit breaking current		kA	25	31.5	25	31.5
Dynamic stable current (peak value)		kA	63	80	63	80
4S thermal stable current		kA	25	31.5	25	31.5
Rated short-circuit making current (peak value)		kA	63	80	63	80
Breaking times of rated short-circuit current		Times	20
Rated operating sequence			O-0.3 S-CO-180 s-CO
Rated insulation level	1min power frequency withstand voltage	kV	95
	Lightning impulse withstand voltage (peak value)		185
Mechanical life		Times	10000
Rated single capacitor bank opening and current		A	630
Rated back-to-back capacitor bank current		A	400
Energy storage motor rated voltage		V	AC、DC:110;220
Rated power of energy storage motor		W	≤230
Energy storage time of energy storage motor		S	≤15
Rated voltage of closing and opening coil		V	Dc:110;220
Rated current of closing and opening coil		A	1.05(110V)0.96(220V)
Contact opening		mm	20±2
Contact stroke		mm	7.5±1.5
Three-phase combination of different periods		ms	≤2
Bounce time of contact closing		ms	≤3
Main circuit resistance (excluding wall contact)		μΩ	≤40