CKJ5-400 / 1140 / 220v AC vacuum contactor uses: CKJ5-400 / 1140 series vacuum contactors for AC 50HZ, rated working voltage up to 1140V, rated operating current 125-400A electricity network, for direct or remote access pass and breaking with the main circuits. Because the main contacts to work in a high vacuum environment, so there is an arc ranking is not exposed, small size, light weight, long life, long maintenance cycle, etc., especially suitable for the composition of the various lights controller and work in oil, chemicals and other occasions . The main parameters Model: CKJ5-400 / 1140 AC vacuum contactor (four normally open four normally closed) Current: 400A Power: 1140V Rated voltage: coil voltage 36V, 110V, 220V, 380V working conditions 1. CKJ5-400 / 1140 height of not more than 2000 meters above sea level. 2. CKJ5-400 / 1140 Ambient air temperature: -25 ~ + 40 ℃. 3. CKJ5-400 / 1140 Relative humidity: Ambient air temperature is + 25 ℃ not more than 50%, at lower temperatures can have a higher relative humidity. The average temperature of the wettest month of + 25 ℃, the monthly average maximum relative humidity of 90%. 4. CKJ5-400 / 1140 mounting surface and the vertical gradient of not more than 15 °. Installation category usually Class Ⅲ. 5. CKJ5-400 / 1140 pollution level is 3. 6. CKJ5-400 / 1140 vibrations not more than 30 m / s field. Structure and working principle CKJ5-400 / 1140 contacts by vacuum switch tube, insulation frame, boom, magnetic circuit cage, electromagnetic operating mechanism and fairing components. Electromagnetic actuating mechanism by the core, the coil, the magnetic pole plate, the armature plate, shaft, boom and other components. CKJ5-400 / 1140 vacuum switch tube static conductive plate screwed in the insulating frame, frame and insulation around the support plate and support bracket with screw coupling of the magnetic circuit. When the coil is energized armature pull, driven boom and guide rod, so that the vacuum switch moving contact sport, contact with the static contact, the contact in the closed state. When the coil is de-energized, the reaction force of the spring in the role of the armature plate release, static and dynamic contact separation to make contacts in the OFF state. CKJ5-400 / 1140 operating mechanism by a solenoid core, the coil, the magnetic pole plate, the armature plate, shaft, boom and other components. Auxiliary contacts located at one end of the armature plate, driven by the auxiliary contact armature moves up and down movement. Use and maintenance 1. CKJ5-400 / 1140 contactor operating voltage and the operating current should not exceed the rated value (control loop principle). 2. CKJ5-400 / 1140 for the new change of vacuum interrupters in advance to check its vacuum. Requires 10-2 Pa (10-4 Torr) or more. Available method for detecting power frequency withstand voltage: contact spacing requirements within the standard range, requiring more pressure 8KV (after three trials, does not allow continuous breakdown or flashover).