VKG1-12 Single Pole Contactor for Capacitor Bank

JCZ7（G）12kV 400A 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 source arc suppression,....

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JCZ7（G）12kV 400A 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

High-Efficiency Single-Pole Vacuum Contactor Optimized for Capacitor Switching

Engineered specifically for reactive power compensation systems, the VKG1-12 single pole contactor for capacitor bank offers superior performance in switching capacitive loads under medium-voltage conditions. Operating at **7.2 kV or 12 kV**, this compact, single-pole vacuum contactor is built with high-quality vacuum interrupters and a robust metal-insulated frame to ensure arc-free interruption, minimal inrush current impact, and extended service life—even under frequent switching cycles.

With rated currents ranging from **160A to 800A**, the VKG1-12 supports making capacities up to **8,000A** and ultimate breaking capability of **8,000A (3 operations)**, making it ideal for dynamic power factor correction in industrial plants, renewable energy stations, and utility substations. Its fast mechanical response—combined with a contact gap of **5–6 mm** and precise overtravel control—ensures reliable synchronization and reduced contact erosion during capacitor energization.

This device excels as a dedicated solution for applications demanding precision and durability, such as:

capacitor bank switching contactor – handles high-frequency make/break operations without restrike
medium voltage capacitor protection – withstands 42 kV power frequency voltage and 75 kV lightning impulse
single-phase reactive load control – compatible with harmonic-rich environments and neutral grounding systems

Backed by a mechanical life of **1 million operations** and an electrical endurance of **100,000 cycles (AC-4)**, the VKG1-12 integrates seamlessly into modern switchgear panels. Its standardized control voltage options (AC/DC 110V, 220V, or 380V) and compact footprint further enhance installation flexibility. As shown in the image above, its clean, modular design reflects a focus on thermal stability, safety, and long-term reliability—making it a trusted choice for engineers prioritizing grid efficiency and equipment longevity.