Low-Voltage Distribution Cabinet Maintenance Steps and Safety Guide

Maintenance Procedure for Low-Voltage Power Distribution Facilities

Low-voltage power distr ibution facilities refer to the infrastructure that delivers electrical power from a power supply room to end-user equipment, typically including distribution cabinets, cables, and wiring. To ensure the normal operation of these facilities and guarantee user safety and power supply quality, regular maintenance and servicing are essential. This article provides a detailed introduction to the maintenance procedures for low-voltage power distribution facilities.

1. Pre-Maintenance Preparations

• Establish a Maintenance Plan: Develop an appropriate maintenance plan based on the characteristics and usage of the low-voltage distribution facilities, including maintenance frequency, tasks, and personnel assignments.

• Inspect Maintenance Equipment: Ensure all maintenance tools are in good condition and that sufficient spare parts are available, including tools, measuring instruments, and maintenance materials.

• Assess the Working Environment: Before maintenance, evaluate the operating environment of the facilities, including temperature, humidity, lighting, and potential safety hazards in the surrounding area.

• Power Down: A power shutdown is mandatory before maintenance begins. Ensure the power is completely isolated to safeguard maintenance and repair personnel.

2. Maintenance Procedures

• Clean Interior and Exterior Surfaces: Wipe down the inside and outside of distribution cabinets with a clean cloth to remove debris, dust, and other contaminants.

• Measure Voltage and Current: Use testing instruments to measure parameters such as voltage, current, and frequency. Report any abnormalities immediately.

• Inspect Terminal Connections: Check for loose or corroded terminal connections in the low-voltage distribution system. Tighten or replace as necessary.

• Inspect Cable Joints: Examine the joints between low-voltage cables. Replace or re-solder if any abnormalities are found.

• Inspect Switches: Check the switches in the distribution cabinet for proper operation. Replace or repair any that are faulty or damaged.

• Inspect Fuses: Check fuses for damage or expiration. Replace if any issues are detected.

• Inspect Residual Current Devices (RCDs): Test the operational status of RCDs. Replace or repair if any abnormalities are found.

• Clean Filters: Clean filters on electrical equipment to ensure the normal operation of the distribution system.

• Inspect Protective Measures: Check protective measures on distribution cabinets, such as protection against electric shock and fire. Repair any defects promptly.

• Inspect Grounding System: Verify the integrity of the grounding system. Repair any issues immediately.

3. Post-Maintenance Tasks

• Organize Maintenance Records: Compile and archive data and records from the maintenance process for future reference.

• Restore Power: After maintenance is complete, restore power and ensure all related equipment functions normally.

• Safety Inspection: Conduct a final safety check to confirm equipment is operating correctly and to ensure the safety of both personnel and users.

• Maintenance Report: Summarize the maintenance work and prepare a detailed report. Document any recurring faults and propose solutions.

4. Precautions During Maintenance and Repair

• Grounding: Pay close attention to grounding during maintenance to prevent electric shock.

• Personnel Protection: Implement necessary safety measures during maintenance to ensure the personal safety of all personnel.

• Maintenance Tools: Use tools that are safe and reliable to avoid damaging equipment or endangering personnel.

• Operating Procedures: Follow established procedures strictly. Do not arbitrarily alter the original equipment structure or wiring connections.

• Operational Skills: Maintenance personnel must possess adequate skills and experience to prevent operational errors.

In summary, the maintenance of low-voltage power distribution facilities must strictly adhere to operational procedures and safety requirements to ensure reliable equipment operation and the safety of both maintenance personnel and end-users.