ZW32-12FOUTDOOR DEMARCATION HIGH VOLTAGE VACUUM CIRCUIT BREAKERS

Short Description:

ZW32-12F outdoor high voltage vacuum demarcation circuit breaker (watchdog switch) is an outdoor power distribution device with a rated voltage of 12KV, three-phase AC, 50HZ . The circuit breaker is mainly used for breaking and closing load current, overload current and short circuit, quick-breaking, grounding protection, optionalreclosing times, local remote control and remote communication in the power system. It is suitable for substations and industrial and mining enterprises. Used for protection and control in electrical systems. When the user’s internal fault occurs in the T-type wiring of the 12KV line, or although it occurs inside the user’s incoming switch, its protection action time limit and the improper protection of the substation’s outgoing switch will cause the substation’s outgoing switch protection to open. If the fault is permanent and the substation recloses unsuccessfully, an accident in the medium voltage user’s field will cause the entire distribution trunk to be out of power. This common spread accident in the power grid will cause significant losses to society. ZW32-12F outdoor high-voltage vacuum demarcation circuit breaker (watchdog switch) (hereinafter referred to as circuit breaker), installed at the responsibility demarcation of the overhead line, that is, the front end of the user’s incoming line, will automatically remove the single-phase ground fault and phase-to-phase in the user Short-circuit faults can prevent faults in the user community from spreading to the mains transmission line, ensure the safety of electricity use for non-faulty users, and improve the reliability of electricity use.

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Product Detail

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Product Overview

ZW32-12F outdoor high voltage vacuum demarcation circuit breaker (watchdog switch) is an outdoor power distribution device with a rated voltage of 12KV, three-phase AC, 50HZ . The circuit breaker is mainly used for breaking and closing load current, overload current and short circuit, quick-breaking, grounding protection, optional reclosing times, local remote control and remote communication in the power system. It is suitable for substations and industrial and mining enterprises. Used for protection and control in electrical systems. When the user's internal fault occurs in the T-type wiring of the 12KV line, or although it occurs inside the user's incoming switch, its protection action time limit and the improper protection of the substation's outgoing switch will cause the substation's outgoing switch protection to open. If the fault is permanent and the substation recloses unsuccessfully, an accident in the medium voltage user's field will cause the entire distribution trunk to be out of power. This common spread accident in the power grid will cause significant losses to society. ZW32-12F outdoor high-voltage vacuum demarcation circuit breaker (watchdog switch ）(hereinafter referred to as circuit breaker), installed at the responsibility demarcation of the overhead line, that is, the front end of the user's incoming line, will automatically remove the single-phase ground fault and phase-to-phase in the user Short-circuit faults can prevent faults in the user community from spreading to the mains transmission line, ensure the safety of electricity use for non-faulty users, and improve the reliability of electricity use.

Working Environment

1. Ambient air temperature: -40℃ ~+40℃ ;

2. Altitude: no more than 2000m;

3.The wind speed does not exceed 34m/s (equivalent to 700Pa on the cylindrical surface);

4.Pollution level: Grade IV;

5.There is no frequent severe vibration, and the earthquake intensity does not exceed 8 degrees;

6. There is no fire, explosion, chemical corrosion place.

7. Nearby remote control

Main functions of the controller

Three-stage overcurrent protection
Reclosing control
Post acceleration function
Zero sequence protection
Auxiliary function (power-on closing, power-off opening)
Remote communication
Nearby remote control

Main Technical Parameters

No.	Item	Unit	Data
1	Rated voltage	kV	12
2	Rated frequency	Hz	50
3	Rated current	A	630
4	Rated short-circuit breaking current	kA	20
5	Rated peak withstand current	kA	50
6	Rated short-time withstand currentW	kA	20
7	Rated short-circuit closing current (peak)	kA	50
8	Mechanical life	Times	10000
9	Rated short circuit breaking current breaking times	Times	30
10	Power frequency withstand voltage (1 min)：（Wet）(Dry) interphase, to earth/Fracture	kV	42/48
11	Lightning impulse withstand voltage (peak) interphase, to earth/Fracture	kV	75/85
12	Secondary circuit 1 min power frequency withstand voltage	kV	2