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Talking about the installation and use precautions of electromagnetic starter
Electromagnetic starter is mainly used to control the direct start, stop and forward and reverse operation of the three-phase squirrel-cage induction motor, and can protect the motor from overload and phase failure.
Features:
1. Aluminum alloy shell die-casting or steel plate welding, high-pressure surface electrostatic spray, beautiful appearance;
2. It can install AC contactor, thermal relay, motor protector, signal lamp and other components according to customer requirements;
3. With overload, short circuit protection;
4. Module structure, various circuits can be assembled freely according to the needs;
5. Can control AC 50HZ, 380V three-phase asynchronous motor direct start and stop, and with overload and phase protection and loss of pressure protection.
6. Pipe or cable wiring.
installation:
1. Before installation, the starter should check whether its technical data is consistent with the working voltage and the capacity of the controlled motor, and its components should be in good condition.
2. The introduction and withdrawal of cables The rubber seals, metal plugs, clamping nuts or compression flanges of the wiring device are used to press the cable tightly to achieve the explosion-proof requirements, and the cable anti-loosening device should be fastened at the same time;
3. Not using the wiring application of rubber seals, metal plug ring, metal plugging plate tightly sealed;
4. Starter shell should be grounded, when installed, its inclination is not greater than 15 degrees;
5. The current setting of the protector should be based on the actual operating current.
Precautions for using maintenance:
1. The protector electronics and RC components are not subjected to power frequency withstand voltage test
2. When the main line is used for pressure test, the protector, RC component and other auxiliary circuits should be disconnected from the main line grounding, and then the withstand voltage test should be performed.
3. When the power grid system is used for 660 (380) V, the main circuit between the phase, relative earth, between the pole and pole power frequency withstand voltage 2500V, when using the power grid system is 1140 (660) V, the main loop phase, relative Inter-ground, phase and pole voltage between the pole 4200V, 1min; control circuit ground voltage 1000V, 1min shall not have flashover and breakdown phenomenon.