1. Check whether the bolts and spring pads of all fasteners are fully tightened.

2. Check whether the sounds of electrical equipment, such as motors and switches, are normal and whether the temperature exceeds the limit.

3. Check and deal with the explosion-proof problems such as chicken feet, sheep tails and exposed joints in cable wiring.

4. Check the performance of the signal lighting system and the cable connection, and ensure that it meets the intact standards and the protection system is sensitive and reliable.

5. Check and maintain the cable of coal winning machine, cable clamp plate and cable in the bottom slot, and there shall be no cable that is hard, stressed and squeezed out from the bottom slot.

5, check the test feeder switch, mobile substation, feeder switch leakage, overcurrent, grounding three protection sensitive, reliable, complete, and test records.

6, each class must do a coal electric drill comprehensive protection device test records, and make records.

7. check whether the standby electrical equipment is in good condition.

8, cleaning equipment, truthfully fill in the maintenance records.

(2) Weekly inspection:

1. Check whether the terminal of the motor is fastened and whether there are burn marks.

2. Check the insulation condition of the motor and make records.

3. Check whether the bolts in the cavity of each control device are fastened and whether there are burn marks, replace the damaged components and make records.

4. Check whether all kinds of equipment components and terminals are loose and crushed.

5. check the working conditions of various components in the electric control box of the shearer motor, and check whether the bolts are loose, damp and rusted.

5, truthfully fill in the maintenance records.

(3) Monthly inspection:

1. Check the cleanliness of switches, cable plugs of junction boxes and explosion-proof surfaces of all electrical equipment, and whether the explosion-proof gap meets the requirements, and carry out rust removal and oil removal.

2. Measure the insulation resistance of motor, switch and transformer, and check and set the relay protection device.

3. Measure the insulation resistance of low-voltage network, and replace the motor with serious insulation and bearing damage.

4. Oil the motor bearings once a month.

5. check whether the terminals and electrical equipment on the high and low voltage sides of the mobile substation are in good condition, whether there are burn marks or not, and replace damaged components.

6. according to the advancing degree of the working face, move the substation and pump station to switch trains, and truthfully fill in the maintenance records.