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Leakage protection is a safety mechanism designed to automatically cut off the power supply when a leakage current exceeds 30mA within 100 milliseconds. This requires highly sensitive and reliable current detection, along with a stable and dependable relay system. In daily use, however, there are often various issues that can arise. Today, we’ll discuss the common causes of leakage protector failures and how to resolve them.
**Common reasons why a leakage protector won’t reset:**
1. A fault in the connected load causing leakage.
2. The “Reset†button on the panel hasn’t been pressed after a trip.
3. Internal faults in the leakage protector itself, such as a mechanical failure or a breakdown in the electronic control circuit.
**Solutions for these issues:**
First, try disconnecting the outgoing lines from the leakage circuit breaker. If it can be closed successfully, the issue likely lies in the wiring. Inspect the cables and fix any problems found. If the circuit breaker doesn’t reset even after removing the load, it may be damaged and need replacement.
In cases where an overload has caused a trip, the circuit breaker might feel very hot. At this point, you should wait for it to cool down before attempting to reset it. If the problem persists, consider replacing it with a slightly larger-rated circuit breaker.
**Important tips for using a leakage protection switch:**
1. Once installed, keep a record of its operations and maintain a proper management system.
2. Test the leakage protection switch once or twice a month while it’s powered on to ensure it’s functioning correctly—especially during thunderstorm season.
3. Regularly check the performance of the device and replace any faulty units promptly.
4. Only trained professionals should perform maintenance. If anything goes wrong, always consult an electrician to avoid further damage.
5. After a storm or unexplained trip, inspect the device thoroughly to identify the cause.
6. If the cause of a trip isn’t immediately clear, you may attempt to reset it once. If it trips again, investigate the root cause and conduct a characteristic test if necessary. Never force power back on without understanding the issue.
7. Before reactivating a leakage protector after it has been out of service, perform the required action characteristic tests.
8. Always follow the manufacturer’s guidelines for setting and using the operating characteristics of the device.
9. After an electric shock incident within the protected area, check the leakage protector to determine why it didn’t activate. Do not remove it until the investigation is complete.
10. Periodically test the operational characteristics of the device to monitor any changes and ensure continued reliability.
By following these guidelines, you can ensure the safe and effective operation of your leakage protection system, reducing risks and prolonging the life of your electrical equipment.