6-10kV MV Vacuum Contactor/Switch for Capacitor Case and Switchgear

VACG3-7.2(12)kV-2

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1. General description

This series mv vacuum contactor consists of electrical insulating frame,metal base,shaft and crank arm,electromagnetic systems,permanent magnet,power modules,auxiliary switches and vacuum interrupters.While control voltage goes across the electromagnetic coil,the armature drives the crutch rotating to open the main contact in the vacuum interrupter. Meanwhile, auxiliary switch cuts off power of electromagnetic coil, the armature drive the crutch rotating to open the main contact in the vacuum interrupter. Meanwhile, auxiliary switch cuts off power of electromagnetic coil, turns to be permanent-magnet maintenance.After power broke by control circuit,energy storage power of power module discharges to electromagnetic coil for degaussing,and the main contact broke under the function of opening spring.

The Technical Specifications of this vacuum contactor define its electrical and mechanical parameters for medium-voltage capacitor switching and motor control applications. This mv vacuum contactor series VACG3-7.2(12)kV-2 consists of electrical insulating frame, metal base, shaft and crank arm, electromagnetic systems, permanent magnet, power modules, auxiliary switches, and vacuum interrupters. The vacg3 contactor operates when control voltage energizes the electromagnetic coil, causing the armature to drive the clutch and open the main contact in the vacuum interrupter. This vacuum contactor features permanent-magnet maintenance mode after the auxiliary switch cuts off coil power. When power is interrupted by the control circuit, the energy storage power of the power module discharges to the electromagnetic coil for degaussing, and the main contact breaks under the opening spring function. This mv vacuum contactor is available in rated currents of 160A, 250A, 400A, and 630A for both 7.2kV and 12kV voltage classes. The vacg3 offers a mechanical life of 1,000,000 operations, making it ideal for frequent switching applications. Each vacuum contactor undergoes rigorous testing to ensure reliable performance in switchgear and capacitor bank installations.

2. Main technical parameter

Item	Unit	VACG3-160~630/7.2-2				VACG3-160~630/12-2
Main circuit rated voltage	kV	7.2				12
Main circuit rated current	A	160	250	400	630	160	250	400	630
Main circuit current making capacity	A/100times	1600	2500	4000	6300	1600	2500	4000	6300
Main circuit make-break capacity	A/25times	1280	2000	3200	5000	1280	2000	3200	5000
Maximum breaking capacity	A/3times	3200	3200	4000	6300	3200	3200	4000	6300
Mechanical life	times	1,000,000
Power-frequency withstand voltage of main circuit	kV	32				42
Power-frequency withstand voltage of auxiliary circuit	kV	2.5
Power-frequency withstand voltage of control circuit	kV	2
Rated operating frequency	times/h	300
Opening time	ms	≤120
Closing time	ms	≤150
Clearance between open contacts	mm	4±0.5				5±0.5
Over travel	mm	≥1.2	≥1.2	≥1.2	≥1.2	≥1.2	≥1.2	≥1.2	≥1.2

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