12kv Two Poles AC Vacuum Contactor Voltage Contactor

High Voltage AC Vacuum Contactor CKG3-12, 160A–630AThe CKG3 series AC vacuum contactor (160–630A) is designed for high-voltage AC networks up to 12kV, with a frequency of 50Hz. It is ideal for long-distance circuit connection and disconnection, as well as frequent starting and stopping of AC motors. This contactor works seamlessly with various protection devices and can be assembled into a flameproof electromagnetic starter.Suitable for power distribution systems below 12kV, the CKG3 vacuum contactor can be equipped with a mechanical interlocking shaft between two units, en...

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High Voltage AC Vacuum Contactor CKG3-12, 160A–630A

The CKG3 series AC vacuum contactor (160–630A) is designed for high-voltage AC networks up to 12kV, with a frequency of 50Hz. It is ideal for long-distance circuit connection and disconnection, as well as frequent starting and stopping of AC motors. This contactor works seamlessly with various protection devices and can be assembled into a flameproof electromagnetic starter.

Suitable for power distribution systems below 12kV, the CKG3 vacuum contactor can be equipped with a mechanical interlocking shaft between two units, enabling mechanical and electrical interlocking. It is widely used for forward/reverse motor control, power braking, and main line switching in electronic control circuits.

With frequent operation capability, long mechanical life, high reliability, low maintenance, and excellent switching performance, the CKG3 series is also perfect as the main switch for loads such as high-voltage fans, providing safe and stable operation.

Item	Data
Rated working voltage (Ue)	12 kV
Rated working current (Ie)	160A, 250A, 400A, 630A
Power frequency withstand voltage	42 kV
Lightning impulse withstand voltage	75 kV
Rated breaking capacity	8Ie, 25 times
Rated closing capacity	10Ie, 100 times
Rated short-time withstand current	1.6kA, 2.5kA, 4kA, 6.3kA (10Ie)
Rated peak withstand current	4kA, 6.3kA, 10kA, 16kA (25Ie)
Short circuit current breaking and closing	0–180s-C0–180s-C0, 1 time
Overload withstand current	2.4kA, 3.8kA, 6kA, 10kA
Rated opening distance	5.5 ± 0.5 mm
Overtravel	21.5 mm
Closing synchronicity	≤2 ms
Mechanical life	500,000 times
Electrical life AC-3	250,000 times
Electrical life AC-4	100,000 times

12kV Two-Pole AC Vacuum Contactor – Engineered for Precision and Reliability

Built for high-performance industrial applications, the 12kV Two Poles AC Vacuum Contactor Voltage Contactor delivers exceptional switching stability in medium-voltage systems up to 12kV at 50Hz. With current ratings from **160A to 630A**, this two-pole vacuum contactor is optimized for frequent motor starting, forward/reverse control, and main line switching—making it a versatile choice for automation-intensive environments.

Featuring a robust mechanical design with **≤2 ms closing synchronicity** and an overtravel of **21.5 mm**, the contactor ensures consistent arc interruption and minimal contact wear. Its high dielectric strength—supporting **42 kV power frequency** and **75 kV lightning impulse withstand voltage**—guarantees Safe Operation even in harsh electrical conditions. The unit can be mechanically interlocked with another contactor via a shared shaft, enabling reliable bidirectional motor control or fail-safe braking sequences.

Two-pole motor reversal contactor – enables seamless forward/backward switching with mechanical interlock compatibility
Medium-voltage flameproof starter component – integrates into explosion-proof electromagnetic starters for hazardous areas
Frequent-duty high-voltage switch – rated for 100,000 electrical operations (AC-4) and 500,000 mechanical cycles

Backed by a breaking capacity of **8×Ie** and short-time withstand current up to **6.3 kA**, this contactor provides dependable protection for critical loads like high-voltage fans, compressors, and conveyors. Its compact footprint, low maintenance needs, and compatibility with standard protective relays make it an efficient, cost-effective alternative to bulkier circuit breakers in controlled motor circuits. Ideal for mining, petrochemical, and heavy manufacturing sectors, the CKG3-12 two-pole contactor combines safety, longevity, and precision in one high-voltage solution.