Three Steps for Daily Inspection
Want your switchgear to work stably? Try this "observation, listening, questioning, and palpation" method:
- Visual Inspection: Check the cabinet weekly for rust and deformation, and ensure the instrument indicator lights are functioning properly.
- Temperature Monitoring: Scan the wiring terminals with an infrared thermometer; be alert if the temperature difference exceeds 15℃.
- Sound Identification: A uniform humming sound is expected during normal operation; immediately disconnect the power if a cracking sound is heard.
Troubleshooting Tips: These hidden dangers are most likely to cause problems:
- Dust Accumulation: Clean with a vacuum cleaner quarterly; use an insulating cleaner for stubborn stains.
- Humid Environment: Check the desiccant before the rainy season; install a dehumidifier if humidity exceeds 60%.
- Loosening Hazards: When tightening bolts annually, remember to use a torque wrench and operate in a diagonal sequence.
Golden Rules for Safe Operation: Remember these when working with electricity:
- Protective Equipment: Insulating gloves and goggles are standard; cuffs must be tightened.
- Operating Sequence: Disconnect the load switch first, then the isolating switch; reverse the operation when restoring power.
- Emergency Preparedness: Place a fire extinguisher within 3 meters; dry powder is most suitable.