Residual current circuit breaker (RCBO, УЗО) NB1L-40 1P+N C40A 30ma 6KA CHINT

Residual current circuit breaker CHINT NB1L-40 1P+N C40 30mA 6kA The residual current circuit breaker (RCBO) of the NB1L series is a combined device that unites the functions of a circuit breaker (overload and short-circuit protection) and a residual current device (protection against current leakage). The model rated at 40A is one of the most powerful in the range of household and office RCBOs, allowing circuits with a high total load to be protected. The high breaking capacity of 6kA guarantees reliable operation of the device even in networks with high short-circuit currents, which are typical of sites located close to transformer substations. Technical parameters Manufacturer: CHINT Electric Series: NB1L-40 (premium range) Rated current (In): 40 A Number of poles: 1P+N (phase + neutral) Tripping characteristic: C (5-10 In) Leakage current (Idn): 30 mA (protection of persons against direct contact) Sensitivity type: AC (protection against sinusoidal alternating leakage currents) Breaking capacity: 6 kA (6 000 A) Device width: 36 mm (2 standard modules) Rated voltage: 230 V AC Design features The device is fitted with a built-in residual current protection unit that continuously compares the currents in the phase and neutral conductors. The front panel carries a TEST button for regular checking of the operability of the tripping mechanism. The device has a contact position indication window and a special flag indicating tripping specifically on leakage current, which allows the cause of the supply disconnection to be diagnosed quickly. The contact assembly is reinforced for operation at a current of 40A, and the terminals provide secure fixing of cable with a cross-section of up to 25 mm². Advantages Comprehensive protection: A single device protects the wiring against fire and people against electric shock. High power: The 40A rating allows it to be used as the incoming device for a flat or for protecting large household appliances. 6kA reliability: Compliance with strict industrial safety standards when used in civil construction. Space saving: It takes up half as much space in the board as a «circuit breaker + RCD» pair. Visual diagnostics: Indication of the cause of tripping (overload or leakage) considerably simplifies maintenance. Field of application The NB1L C40 30mA is used as the incoming protective device in flat and floor distribution boards, as well as for protecting dedicated supply circuits of electric cookers, powerful instantaneous water heaters, air conditioning systems and underfloor heating. It provides the maximum level of safety in residential premises and offices where reliable protection is required under considerable current loads.

Manufacturer

CHINT

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