CHINT NL1E-63A circuit breaker

The NL1E-63A circuit breaker is a common residual current operated circuit breaker under the Chint Group. It is mainly used to automatically cut off the circuit when faults such as leakage, overload or short circuit occur in the circuit, so as to protect personal safety and the normal operation of electrical equipment.

 Basic Parameters

- **Rated Current**: 63A.

- **Number of Poles**: Single pole two-wire, two poles, three poles, three poles four-wire and four poles.

- **Rated Voltage**: 230V for two poles, 400V for four poles.

- **Residual Operating Current**: 30mA.

Functional Features

- **Leakage Protection**: When a leakage phenomenon occurs in the circuit, this circuit breaker can detect the leakage current within an extremely short time and quickly cut off the circuit, thus effectively preventing the occurrence of electric shock accidents.

- **Overload Protection**: When the current in the circuit exceeds the rated current of the circuit breaker, the circuit breaker will automatically cut off the circuit to prevent the electrical equipment from being damaged due to overload.

- **Short Circuit Protection**: When a short circuit fault occurs in the circuit, the circuit breaker can quickly cut off the circuit to protect the safety of electrical equipment and lines.

- **Isolation Function**: After cutting off the circuit, the circuit breaker can isolate the circuit from the power supply, which is convenient for maintenance and repair.

 Application Scenarios

- **Household Electricity Use**: It is used to protect the safety of household electrical appliances and personnel, and prevent electrical fires and electric shock accidents caused by faults such as leakage, overload or short circuit.

- **Industrial Electricity Use**: It can be used for the protection of electrical equipment in industrial production, such as motors, welding machines, distribution boxes, etc., to ensure the safe operation of industrial production.

- **Commercial Electricity Use**: In commercial places such as shopping malls, hotels, office buildings, etc., it is used to protect the safety of electrical equipment and personnel and ensure the normal progress of commercial activities.

Regarding the service life of the NL1E-63A circuit breaker, the unified "service life" value is not clearly marked in the currently publicly available specific model parameters. The actual service life of the circuit breaker is affected by many factors such as **usage environment, load conditions, operation frequency, and maintenance status**. Generally, the following general information can be referred to:

 1. **Conventional Service Life Range in the Industry**

   - **Household/General Scenarios**: Under the conditions of normal load (not frequent overload), dry and clean environment, and no frequent closing and opening operations, the service life of small residual current circuit breakers (such as the NL1E series) is usually **10-20 years**.

   - **Industrial/High-Frequency Operation Scenarios**: If it is used for frequently starting and stopping equipment or high-impact loads (such as motor control), the service life may be shortened to **5-10 years**, or even shorter.

2. **Key Influencing Factors**

   - **Number of Overload and Short Circuit Times**: Each overload or short circuit trip will cause a certain amount of wear and tear on the internal contacts and electromagnetic mechanism. Frequent fault trips will accelerate the aging.

   - **Environmental Conditions**: Humid, dusty, corrosive gas or high-temperature environments will cause the aging of insulating components and the rusting of metal components, significantly shortening the service life.

   - **Maintenance**: Regular cleaning, checking the tightness of the wiring terminals (to avoid poor contact and heating), and testing the leakage protection function (press the "test button" once a month) can extend the service life.

3. **Manufacturer's Suggestions**

   - Chint officially usually recommends conducting **regular functional tests** on the circuit breaker (such as testing the leakage protection function every month), and replacing it in a timely manner when the following situations are found:

     - The casing is damaged, and the wiring terminals are ablated;

     - Frequent tripping after closing (in a non-fault state);

     - The test button does not act or cannot be reset normally after being pressed.

   - If accurate service life data is required, it is recommended to directly refer to the **product manual** or contact Chint's customer service (obtain after-sales support through official channels).

 Conclusion

The service life of the NL1E-63A circuit breaker can reach **more than 10 years** under ideal usage conditions, but in practice, it needs to be evaluated in combination with specific working conditions. Regular maintenance and standardized use are the keys to extending its service life. If there are abnormal phenomena or it has been used for more than 10 years, it is recommended to replace it first to ensure the safety of electricity use.