Common Troubleshooting for Low-Voltage Electrical Work

Common Fault Types and Troubleshooting

Power Supply Faults

1. No Power Fault

   • Check circuit breaker status
   • Measure input voltage
   • Troubleshoot line breaks

2. Abnormal Voltage

   • Measure three-phase voltage balance
   • Check neutral line connections
   • Troubleshoot load imbalance

Equipment Faults

• Poor contact troubleshooting
• Overload protection activation
• Insulation performance degradation

Troubleshooting Process

1. Observe fault phenomena
2. Analyze possible causes
3. Conduct step-by-step testing and verification
4. Implement solutions