Low-voltage power distribution cabinet daily maintenance - Solutions - Huaqiang Electronic Network

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

1.5PF SOT23-6 Low Capacitance 5V Breakdown Voltage 6V SRV05

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent

First, the daily maintenance of low-voltage power distribution cabinet
1. Regularly check the presence of pests in the cabinets and conduct booby traps on a regular basis.
2. Check that the warning signs and service cards are placed correctly.
3. Check whether the emergency tools, lamps are complete, normal, and the handles of the crank and fuse are complete.
4. Check the cable connector for heat discoloration (generally silver), and whether the ground wire is rusted (whether the solder joint is normal)
5. Check if the capacitor case inside the capacitor cabinet is good, whether there is leakage or expansion, and whether the indicator light is good.
6. Check the ground wire contact of each capacitor case.
7. Do a good job of cleaning and dust removal for each cabinet.
8. Check the fan operation of each cabinet.
Second, the first level of maintenance
1. Check that the busbar and its lower leads are secure.
2. Check that the secondary circuit wiring is secure, the fuse is intact, and the insulation resistance is shaken.
3. Capacitor cabinet inspection: When the air switch is disconnected without capacitor, the capacitor controller should be tested for action. The first break should be combined first, and the rear break should be combined to adjust the overvoltage protection, undercurrent protection and switching threshold. .
4. Each indicator light should be in good condition. Check and adjust the circuit breaker leakage switch, thermal relay, and relay and multi-function meter.
5. Check whether the indicator lights of each cabinet are normal, whether the position of the controller switch is normal, the operation should be normal, and whether the manual interlocking of the mechanical interlocking part is reliable.
6. Check if the fasteners of each soft starter and inverter are not loose.
Third, secondary maintenance
1. Check whether the drawer switch is flexible or not, its mechanical locking is reliable, and the contactor contacts are good.
2. Check whether the elastic force of each knife edge in the circuit breaker is normal and the arc extinguishing device is intact.
3. Check that each cable head wiring nut is tight.
4. After disconnecting the main switch of the power receiving cabinet and the communication cabinet, it should be flexible to shake out or shake out with a special rocker. The secondary wiring heads of each transformer and other contacts are well fastened without looseness, and the primary and secondary lines are free from mildew.
Daily maintenance of the incoming switch Prerequisites: The circuit breaker is opened to ensure that the energy storage spring has been released. The circuit breaker is separated from the fixed by the rocker. At the same time, the power supply circuit and the auxiliary circuit are cut off, and the terminals on the power supply and load side are It is obvious that the position is grounded.
1. Check the cleanliness of the equipment, use a clean, dry cloth to wipe off any dust and oil, and if possible, use a non-corrosive detergent.
2. Check that the device nameplate is intact. Use a clean dry cloth half angle to clean these nameplates.
3. Wipe off dust, mold and oxides, and also clean the inside of the fixed part of the draw-out circuit breaker.
4. Make sure there are no foreign objects in the circuit breaker compartment.
5. Use a clean, dry cloth to remove dust or dirt from the circuit breaker's edge and bus.
6. Verify that the bolts used for the terminal connections are properly tightened and that there are no signs of local overheating on the terminals. It is possible to recognize whether or not heat is generated by observing whether or not the color of the contact portion is changed, and the contact portion is usually silvery white.
7. Check that the cable on the sliding contact or terminal block is secure.
8. Please contact ABB Technical Responsible Department if there is a need for repair.
9. Please read the relevant information carefully.