Maintenance process of distribution cabinet: 1. Report the power outage maintenance plan (report to relevant departments); 2. Investigate the switch and scope of power failure of maintenance equipment, the live parts reserved, the conditions of maintenance site operation, the layout of reliable measures, and make relevant survey records. 3. Handle maintenance work ticket; Prepare standardized operation instructions for maintenance of distribution cabinet; 4. Prepare tools (including reliable tools) and materials required for maintenance; Handle work permit procedures before commencement; 5. Power failure, power inspection, installation of grounding wire, use of personal security wire, hanging signs and installation of barriers. 6. Conduct maintenance according to the instructions and make relevant records; 7. After the completion of maintenance tasks, remove reliable measures and go through work termination procedures; 8. Restore power transmission; 9. Maintenance operation summary; 10. Data archiving.