CKG3 Medium Voltage Vacuum Contactor For Switchgear

JCZ1-6kv(7.2kv)/10kv(12kv) High Voltage Vacuum ContactorThis series of medium-voltage vacuum contactors uses high-quality vacuum interrupters, combined with a metal frame and insulating supports, providing excellent breaking performance. They are suitable for single-phase or two-phase power network systems below 6KV(7.2KV) and 10KV(12KV), allowing for long-distance switching and interruption, frequent starts, and control of resistive, inductive, and capacitive loads. The JCZ1 series single-pole medium-voltage vacuum contactor is commonly used in power protection applications such as signal sou...

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JCZ1-6kv(7.2kv)/10kv(12kv) High Voltage Vacuum Contactor

This series of medium-voltage vacuum contactors uses high-quality vacuum interrupters, combined with a metal frame and insulating supports, providing excellent breaking performance. They are suitable for single-phase or two-phase power network systems below 6KV(7.2KV) and 10KV(12KV), allowing for long-distance switching and interruption, frequent starts, and control of resistive, inductive, and capacitive loads. The JCZ1 series single-pole medium-voltage vacuum contactor is commonly used in power protection applications such as signal source arc suppression, harmonic neutral grounding, and load boxes. As a main switch, it features a compact size, fast making and breaking speeds, and strong interruption capacity.

Tech. parameters	Model	160/7.2(12)	250/7.2(12)	400/7.2(12)	630/7.2(12)	800/7.2(12)
Rated voltage of Main Loop	(KV)	7.2(12)	7.2(12)	7.2(12)	7.2(12)	7.2(12)
Rated current of Main Loop	(A)	160	250	400	630	800
Main loop making capacity	(A/100times)	1600	2500	4000	6300	8000
Main loop switching capability	(A/25times)	1280	2000	3200	5000	6000
Ultimate breaking capacity	(A/3times)	3200	4000	4500	6300	8000
Mechanical life	(10,000 times)	100	100	100	100	100
Electrical endurance AC3	(10,000 times)	25	25	25	25	25
Electrical endurance AC4	(10,000 times)	10	10	10	10	10
Power frequency withstand voltage of main circuit (fracture)	(KV)	32(42)	32(42)	32(42)	32(42)	32(42)
Power frequency withstand voltage of control circuit	(KV)	2	2	2	2	2
Rated operating frequency	(Times/h)	300	300	300	300	300
Clearance between open contacts	(mm)	5(6)±0.5	5(6)±0.5	5(6)±0.5	5(6)±0.5	5(6)±0.5
Overtravel	(mm)	1.5±0.5	1.5±0.5	1.5±0.5	1.5±0.5	1.5±0.5
Secondary control voltage	(V)	AC or DC:110/220/380 or customized

CKG3 medium voltage vacuum contactor – High-Performance Switching for Demanding Industrial Applications

CKG3 Medium Voltage Vacuum Contactor For Switchgear

The CKG3 medium voltage vacuum contactor is engineered for frequent switching, high reliability, and long electrical life in 7.2kV/12kV Power Systems. Designed for integration into compact switchgear, motor control centers, and industrial automation setups, this contactor excels in controlling resistive, inductive, and capacitive loads—including transformers, motors, and capacitor banks—where conventional air or oil-based switches fall short.

Unlike standard circuit breakers, the CKG3 vacuum contactor for switchgear leverages a hermetically sealed vacuum interrupter mounted on a robust metal frame with high-grade insulating supports. This ensures arc-free interruption, minimal contact erosion, and stable performance even under 300 operations per hour. With rated currents ranging from 160A to 800A and ultimate breaking capacities up to 8,000A, it meets the rigorous demands of AC-3 and AC-4 duty cycles.

Key technical strengths include:

High making capacity: Up to 8,000A (for 100 operations), ideal for inrush-heavy applications
Long electrical endurance: 25,000+ AC-3 cycles and 10,000+ AC-4 cycles
Mechanical life exceeding 1 million operations (100 × 10,000 cycles)
Power frequency withstand voltage of 32kV (42kV for 12kV class) across open contacts
Flexible control voltage options: AC/DC 110V, 220V, 380V, or custom configurations

Commonly deployed in harmonic neutral grounding systems, arc suppression circuits, and load bank testing, the CKG3 medium voltage vacuum contactor offers fast make-and-break action, compact footprint, and seamless compatibility with modern protection relays. Its rugged construction—visible in the image above—ensures dependable operation in harsh industrial environments with minimal maintenance.

For engineers seeking a durable, high-cycle switching solution that bridges the gap between contactors and full circuit breakers, the CKG3 delivers unmatched efficiency, safety, and lifecycle value in medium-voltage control applications.