7.2kv 12kv High Voltage Vacuum Contactor (JCZ5)

JCZ5 series indoor AC high voltage vacuum contactors are designed for three-phase AC systems, 50Hz, with rated voltages of 7.2kV, 10kV, and 12kV or below, and a maximum rated current up to 630A. These vacuum contactors are widely used in medium and high voltage power distribution networks for reliable switching, frequent control, and protection of high voltage electrical equipment. With stable performance, long service life, and strong breaking capability, the JCZ5 series is an ideal choice for applications requiring safe and efficient operation of motors, transformers, and other high voltage....

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Detailed Description
Product Encyclopedia

JCZ5 series indoor AC High Voltage vacuum contactors are designed for three-phase AC systems, 50Hz, with rated voltages of 7.2kV, 10kV, and 12kV or below, and a maximum rated current up to 630A. These vacuum contactors are widely used in medium and high voltage power distribution networks for reliable switching, frequent control, and protection of high voltage electrical equipment. With stable performance, long service life, and strong breaking capability, the JCZ5 series is an ideal choice for applications requiring safe and efficient operation of motors, transformers, and other high voltage loads.

Model	JCZ5-7.2/160	JCZ5-7.2/250	JCZ5-7.2/400	JCZ5-7.2/630
Rated voltage(kv)	7.2
Rated current(A)	160	250	400	630
Main circuit joint capability(A/100 times)	1600	2500	4000	6300
On-off capability of main circuit(A/10times)	1280	2000	3200	5000
Limit breaking capacity(A/3 times)	3200	4000	4500	6300
Mechanical life(Ten thousand times)	200
Mechanical lock life(Ten thousand times)	10
Main circuit power frequency voltage withstand(kV)	32
Auxiliary circuit power frequency voltage withstand(kV)	2.5
Power frequency voltage withstand of control circuit(kV)	2
Rated operating frequency(times/h)	300
Frequency of mechanical lock operation(times/h)	30
Contact opening(mm)	4±0.5
Overrange(mm)	1.5±0.3

7.2kV/12kV High Voltage Vacuum Contactor JCZ5 – Trusted Performance for Critical Power Systems

The 7.2kV 12kV High Voltage Vacuum Contactor (JCZ5) is engineered for demanding indoor applications in three-phase AC power networks operating at 50Hz, with system voltages up to 12kV and continuous current ratings from **160A to 630A**. Designed for frequent switching and reliable control, this vacuum contactor ensures stable operation of high-voltage motors, transformers, and distribution feeders—delivering safety, efficiency, and longevity even under heavy-duty cycles.

High-frequency medium-voltage contactor – supports up to 300 operations per hour for dynamic industrial loads
Indoor vacuum switching solution – ideal for switchgear rooms requiring compact, maintenance-free arc interruption
Robust motor load controller – handles starting currents up to 10×Ie with proven breaking performance

With a mechanical life of **2 million operations** and a rated operating frequency of **300 cycles/hour**, the JCZ5 series excels in environments that demand relentless reliability. Its main circuit withstands **32 kV power frequency voltage**, while contact parameters—such as a precise **4 ± 0.5 mm opening distance** and **1.5 mm overrange**—optimize arc quenching and contact alignment. The contactor also features strong breaking capacity, with limit interruption reaching **6300A (3 times)** for the 630A model, ensuring resilience during fault conditions.

Suitable for integration into metal-enclosed switchgear or standalone control panels, the JCZ5 vacuum contactor combines compact design with high dielectric strength and rapid response. Whether used for capacitor bank switching, motor soft-start bypass, or transformer energization, it provides a cost-effective, low-maintenance alternative to bulkier circuit breakers—making it a smart choice for utilities, mining operations, and industrial facilities seeking dependable medium-voltage control.