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CKG3-160A 250A 400A 630A High Voltage 12KV AC Vacuum Contactor

CKG3-12 series high voltage vacuum AC contactor is suitable for AC 50-60Hz, the main circuit rated working voltage is 12KV, the rated current is below 630A in the power network for long distance connection and disconnection line and frequent start It is suitable for controlling AC motors, and it is more suitable to replace the vacuum circuit breaker with fuses and various protection devices.  
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Applying Ambient Conditions

  1. The ambient air temperature is not higher than +40°C, not lower than -10°C;
  2. The altitude of the installation site should not exceed 1000 meters for the ordinary type and 4000 meters for the plateau type;
  3. The relative humidity of the air, the monthly average maximum relative humidity of the wettest month is 90%, the monthly average minimum temperature of the month is 25C, and the condensation on the product surface due to humidity changes is considered;
  4. There is no obvious shaking and shock vibration occasions.
  5. In a place without explosion hazard, and there is no gas and dust (including conductive dust) sufficient to corrode insulation;
  6. Places without rain and snow.

Features

  • High arc extinguishing capacity
  • Good pressure resistance
  • High operating frequency
  • Long life
  • No arcing out
  • Small volume
  • Light weight
  • Longer maintenance intervals

Product Paramenters

Rated working voltage (Ue) 12kV
Rated working current (Ie) 160A, 250A, 400A, 630A
Power frequency withstand voltage 42kV
Lightning impulse withstand voltage 75kV
Rated breaking capacity 8le 25 times
Rated closing capacity 10le 100 times
Rated short-time withstand current (10Ie)1.6kA, 2.5kA, 4kA, 6.3kA
Rated peak withstand current (25Ie)4kA, 6.3kA, 10kA, 16kA
Short circuit current breaking and making (10le)0-180S-CO-180S-CO 1time
Overload withstand current (15Ie)2.4kA, 3.8kA, 6kA, 10kA
Rated distance 5. 5±0.5mm
Overtravel ≥1.5mm
Closing synchronization ≤2ms
Mechanical life 500000 times
Electric life AC-3 250000 times
Electric life AC-4 100000 times

CKG3 160 250 400 6307

CKG3 160 250 400 6307

The CKG3 series 12kV AC vacuum contactor is a high-voltage switching device designed for frequent operation and reliable control of electrical loads in medium-voltage systems. Available in 160A, 250A, 400A, and 630A ratings, it uses vacuum interruption technology to deliver fast arc extinction, high durability, and safe performance.

This 12kV AC vacuum contactor is widely used in industrial and commercial applications such as motor control, transformer switching, capacitor banks, and power distribution systems. It is especially suitable for environments requiring frequent switching operations, including mining, manufacturing plants, and power infrastructure.

Designed for industrial users, electrical contractors, and distributors, the CKG3 series offers compact structure, stable electromagnetic operation, and compatibility with various switchgear systems, improving overall efficiency and reliability.

Key features:

  • Vacuum interrupter for fast arc quenching and long service life

  • Multiple current ratings (160A to 630A) for flexible applications

  • High operational frequency capability for demanding environments

  • Compact and lightweight design for easy installation

  • OEM/ODM customization supported by professional factory manufacturer

  • Low MOQ and competitive wholesale pricing for distributors and wholesalers

As a reliable supplier, manufacturer, and wholesaler, this product ensures consistent quality, cost-effective solutions, and scalable supply for global B2B buyers and electrical system integrators.