1. Check whether the three-phase web service, the three-phase current exceed the index value, and the three-phase voltage are the same.

2. Check whether the composite insulator is damaged or skewed, whether the closed bus is fixed and whether the latch is loose.

3. Check whether the surface of the pole of the substation equipment is clean and tidy, and ensure that the operation and maintenance service staff carry out the dust removal maintenance on time.

4. Check whether the doors and windows in the room of the working standard voltage substation equipment are detailed, whether the relative humidity of the air meets the characteristic requirements of the electrical equipment, whether the air circulation and the ambient temperature of the environment.

5. Check whether the connection points of each part of the circuit are heated.

6. Check whether there is abnormal sound, vibration or burnt smell inside the low-voltage electrical machinery and equipment, as well as all substation equipment and structural parts.

7. Check whether the main road, the separated load condition and the identification of the instrument panel in the vehicle correspond to each other.

8. Check whether the machinery and equipment in the high and low voltage distribution room, the lighting equipment and machinery in the room are normal, and whether the maintenance and safety exits inside and outside the room are smooth.

9. In places where it is easy to be vibrated or dusty by external forces, be sure to check whether the loosening agent of the protective cover of electrical equipment is clean and tidy; Is the rain leakage of the anti pollution box of outdoor electrical equipment in rainy days.

10. Check whether the grounding system of distribution box and low-voltage electrical appliance shell is of high quality.

11. Check the enclosed bus of the electrical equipment of the primary control circuit in the low-voltage distribution box and the spacing of the reasonable layout of other plug-in conductors.