Maintenance procedures for control cabinet of low voltage distribution cabinet:

Carry out sectional maintenance. First, maintain the security load section and stop the power supply of the security load. If the load is normally supplied to the market, disconnect the air switch for the power supply of the security load, put the generator selection switch in the "stop" position, disconnect the positive and negative lines of the battery, mark the spleen to prevent the generator from sending electricity, check whether the bus joint is deformed or whether there is any discharge blackening trace, How to maintain the tight connection bolts of the distribution box, replace the rusty sub-section of the screw calibration lattice to ensure the connection is tight, check whether the insulation on the bus is loose and damaged, which is used to ballad the main air switch from the distribution cabinet by the handle, check whether the main contact of the gold has any traces of acetylene melting, check whether the isolating cover is black or damaged, tighten the wiring screws, clean the dust in the cabinet, and close the test machine.

Take out the separate cabinet from the cabinet and tighten the terminals, check the installation and connection of current transformer, ammeter and electrical friends, and check the flexible reliability of handle operating mechanism. Once the air in the nursery is tight, the incoming and outgoing lines of Zhuang Cheng family are saved, and the dust at the outgoing line in the switch school and behind the distribution cabinet shall be cleaned: when maintaining the capacitor cabinet, the capacitor main switch shall be disconnected, Discharge the capacitor to the ground one by one with a conductor of more than 10 mm, then check whether the contactor, capacitor connection screw and grounding device are good, check whether the capacitor has bulging phenomenon, and clean the dust in the cabinet with a vacuum cleaner.