ZW32-12 Outdoor high voltage vacuum circuit breaker

Overview:

ZW32-12 outdoor vacuum circuit breaker (hereinafter referred to as circuit breaker) is an outdoor power distribution equipment with a rated voltage of 12kV and three-phase AC 50Hz. It is mainly used to break and close the load current, overload current and short-circuit current in the power system. It is suitable for protection and control in substations and industrial and mining enterprises’ power distribution systems, as well as places where rural power grids are frequently operated. This circuit breaker has the characteristics of small size, light weight, anti-condensation, maintenance-free, etc., and can adapt to relatively harsh climatic conditions and dirty environments.

Main Technical Parameters:

Project Parameter
Rated voltage 12kv
Rated freqencey 50Hz
Rated current 630A
Rated short-circuit breaking current 20kA
Rated peak withstand current (peak) 50kA
Rated short-time withstand current 20kA
Rated short-circuit making current (peak value) 50kA
Mechanical life 10000 Times
Rated current breaking times 30 Times
Power frequency withstand voltage (1min): (wet) (dry) phase-to-phase, to ground/break 42kv / 48kv
Lightning impulse withstand voltage (peak value) phase-to-phase, to ground/break 75kv / 85kv
Secondary circuit 1min power frequency withstand voltage 2kv

Standards: 

◆ GB1984 “AC high-voltage circuit breakers”;
◆ GB11022 “Common technical requirements for high-voltage switchgear and control equipment standards”;
◆ GB311.1-6 “Insulation coordination of high-voltage power transmission and transformation equipment”;
◆ GB763 “Heating of AC high-voltage electrical appliances during long-term operation”;
◆ GB2706 “Dynamic and thermal stability test methods for AC high-voltage electrical appliances”;
◆ GB3309 “Mechanical tests for high-voltage switchgear at room temperature”;
◆ DL/T593 “Common ordering technical conditions for high-voltage switchgear”.

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