Rittal cabinets – daily maintenance methods for high and low voltage distribution cabinets

Complete set of electrical maintenance knowledge:

1. Low-voltage distribution cabinet

1. Regularly check whether there are traces of pest activity in each cabinet, and carry out trapping regularly.

2. Check whether the warning signs and maintenance signs are placed correctly.

3. Check whether the emergency tools and lamps are complete and normal, and whether the crank handle and fuse handle are complete.

4. Check whether the cable joint has heat discoloration (generally silver) and whether the grounding wire is corroded (whether the soldering point is normal).

5. Check whether the capacitor shell in the capacitor cabinet is good, whether there is leakage and expansion, and whether the indicator light is good.

6. Check the contact of the grounding wire of each capacitor shell.

7. Do a good job of cleaning and dust removal of each cabinet.

8. Check the working condition of the fans of each cabinet.

Second, the first level of maintenance

1. Check whether the busbar and its lower lead are firm.

2. Check whether the wiring of the secondary circuit is firm, whether the fuse is intact and the shaking test of insulation resistance.

3. Inspection of the capacitor cabinet: when the air switch is disconnected without capacitance, the action test of the capacitor controller should be carried out, and the over-voltage protection, under-current protection and switching threshold should be adjusted.

4. The indicators should be in good condition, and the circuit breaker leakage switch, thermal relay, intermittent relay, multi-function meter, etc. should be checked and adjusted.

5. Check whether the instruction lamp is normal, whether the switch position of the controller is normal, the operation should be normal, and whether the mechanical interlocking part of manual debugging is reliable.

6. Check whether the fasteners of each soft starter and inverter can be loose.

3. Secondary maintenance

1. Check whether the drawer switch is flexible to push in or out, its mechanical locking is reliable, and whether the contactor contact is good.

2. Check whether the elastic force of each knife edge in the circuit breaker is normal and whether the arc extinguishing device is in good condition.

3. Check whether the wiring nuts of each cable head are tightened.

4. After disconnecting the main switch of the power receiving cabinet and the contact cabinet, shake out or shake out with a special crank should be flexible, the secondary terminals such as the transformer are in good contact and fastened without loosening, and the primary and secondary lines are free of mildew.

Fourth, the daily maintenance of the incoming switch

1. Check the cleanliness of the device, use a clean, dry cloth to wipe off any dust and oil stains, and if possible, use a non-corrosive detergent.

2. Check whether the nameplate of the equipment is in good condition. Use a clean dry cloth to clean these nameplates on the half corner.

3. Wipe off dust, mold and oxides, and also clean the inside of the fixed part of the draw-out circuit breaker. Make sure there are no foreign objects in the circuit breaker room.

4. Use a clean and dry cloth to remove dust or dirt from the edge and busbar of the circuit breaker.

5. Confirm that the bolts used for terminal connections are properly tightened and that there are no signs of localized overheating on the terminals. Heat can be identified by looking at the color of the contact parts, which are usually silvery-white.

7. Check that the cables on the sliding contacts or terminal strips are secure

How it should be maintained on a daily basis

1. Do a good job of insulation

Usually the temperature range of high and low voltage complete sets of distribution cabinets is between -10 °C and 45 °C, if the ambient temperature is too high, the conductivity of metal parts will be lower, and the resistivity will become larger, and the oxidation will gradually accelerate, and the dielectric strength of insulating parts will also decrease. Of course, too cold environment will also cause large internal stress in equipment components, thereby destroying the reliability of insulators. Therefore, it is necessary to add some reinforced insulation electrical appliances and insulation protection measures according to the situation, and the surrounding environment requires no fire source, no pollution, and no corrosive chemicals.

2. Do a good job of dust prevention regularly

In order to eliminate the impact of dust accumulation on insulation performance, the dust in the equipment should also be cleaned regularly with a brush, and the circuit breaker that is often operated in daily life should be regularly checked for the loosening of the fixing screws and do a good job of fastening.

3. The internal wiring of the high and low voltage complete sets of distribution cabinets must be reasonable

Sometimes because of the production needs, need to connect the temporary power supply from the switch cabinet for the use of high-voltage equipment, in strict accordance with the electrical safety management regulations, the use of good insulation performance of the wire, its safety should be able to fully meet the needs of the electrical load, so that electrical professionals to operate, the wiring is required to be smooth and not knotted, there is no mutual entanglement between the wires, and reliable grounding work is done. When the temporary power supply is not needed, the newly added power supply facilities need to be dismantled and cleaned up in time.

Rittal cabinets – daily maintenance methods for high and low voltage distribution cabinets

Rittal cabinets – daily maintenance methods for high and low voltage distribution cabinets

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