Daily maintenance and overhaul of electrical control cabinets - Solutions - Huaqiang Electronic Network

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

1. Check the environment around the cabinet, use a thermometer, hygrometer, recorder to check the ambient temperature -10 ° C ~ +50 ° C, ambient humidity below 90%, whether it is frozen.
2. Check all devices for abnormal vibration, abnormal sound
3. Check if the main circuit voltage of the power supply voltage is normal.
4. Remove the inverter wiring, short-circuit the terminals R, S, T, U, V, W, and measure the insulation resistance between them and the ground terminal with a DC500V megameter. The fastener should be reinforced above 5M ohms and the observation component should be observed for signs of fever.
5. Check the terminal block for damage, the conductor is skewed, and the outer layer of the wire is damaged.
6. Check whether the filter capacitor leaks liquid, whether it is swollen or not. The static capacitance measured by the capacity measuring device should be above 85% of the rated capacity; check whether the relay has "Be, Be" sound, whether the contact is rough or broken; Check the resistor resistor for cracks and check for broken wires.
7. Check whether the output voltage of each phase is balanced when the inverter is running; perform sequence protection action test, display, and whether the protection circuit is abnormal.
8. Check the cooling system for abnormal vibration, abnormal sound, and whether the connecting parts are loose.