Chint NXBLE63 – 2P/C40 is a 2 – pole (2P) miniature residual current circuit breaker. Its main parameters and functions are as follows:
Core Parameters
Rated Current: 40A (“C40” indicates that the tripping characteristic is Type C and the rated current is 40A);
Pole Number: 2P (cuts off both the live wire and the neutral wire simultaneously);
Residual Current Protection: AC type (detects ordinary AC leakage). The residual operating current is usually 30mA (an industry conventional value, and some models support options such as 50mA/75mA);
Breaking Capacity: 6kA (can safely cut off circuits with a short – circuit current of not less than 6000A);
Applicable Voltage: 230V (for single – phase circuits);
Mechanical/Electrical Life: The mechanical life is 20,000 times, and the electrical life is 10,000 times.
Main Functions
- Residual Current Protection: When there is electric shock to the human body (current ≥ 30mA) or equipment leakage in the circuit, the power supply is quickly cut off within 0.1 second to prevent electric shock casualties;
- Overload Protection: If the circuit load is too large (current exceeds 40A), it will automatically disconnect to avoid overheating and fire of the circuit;
- Short – Circuit Protection: When a short circuit occurs in the circuit (current increases sharply in an instant), the circuit is cut off immediately to protect electrical appliances and the circuit;
- Isolation Function: It can be used as a switch for infrequent on – off of the circuit under normal conditions.
Application Scenarios
Household Electricity: For high – power socket circuits in kitchens, living rooms, etc. (such as air conditioners, electric water heaters), it replaces traditional air switches and adds residual current protection;
Small – scale Commercial Places: For socket or lighting circuits in convenience stores and offices, meeting the electricity demand within 40A;
Decoration and Renovation: Upgrading the residual current protection of old circuits to meet the new national standard’s requirement that “socket circuits must be equipped with residual current protection”.
Installation and Use Precautions
– It should be selected according to the actual load of the circuit to avoid “a big horse pulling a small cart” or “a small horse pulling a big cart”;
– Press the “test button (T key)” once a month to verify whether the residual current protection function is normal;
– When installing, the live wire (L) and the neutral wire (N) must be distinguished. If the wiring is reversed, the residual current protection function may fail.
