SCHNEIDER A9R74240 RCCB Residual Current Circuit Breaker Type AC 2P 40A 300mA

RCD Circuit Breaker SCHNEIDER A9R74240 Residual Current Protective Device, RCCB Type AC 2P 40A 300mA
The Schneider circuit breaker is a residual current circuit breaker (RCCB) in the Acti 9 iID range, essential for electrical system safety. It has a maximum rated operating current of 40A. A key feature is its earth leakage detection sensitivity of 300 mA (milliamperes), and it is Type AC, meaning it can instantaneously detect pure sinusoidal AC leakage currents with 300 mA sensitivity. It is designed primarily to prevent electrical fires caused by damaged cable insulation and high earth leakage currents, as well as to protect individuals from indirect contact at a safe level. This device operates with voltage-independent technology, meaning it can trip even during low system voltage or voltage fluctuations, ensuring the circuit is disconnected when leakage current occurs to protect both property and the continuity of the electrical system.

Specifications

- Fire protection and indirect contact electric shock protection

- With 300 mA sensitivity, this device is configured to trip when high leakage current occurs, a level that helps prevent risks of overheating in wiring which leads to electrical fires.

- Suitable for installation as an earth leakage protection device in main distribution boards 

- Capable of detecting pure sinusoidal AC leakage currents, which are common in standard electrical appliances

- The tripping mechanism operates independently of the supply voltage (voltage-independent, no electronic circuits), ensuring that the device trips immediately for safety upon an earth leakage current, even during low voltage or fluctuations

Applications & Usage

- Protects internal circuits in residential/commercial/light industrial buildings that require leakage current protection and reduced fire risk

- Used in systems requiring immediate power disconnection upon earth leakage (e.g., machine rooms, kitchens, water pump systems)

- Suitable for use in combination with branch breakers / MCCBs or other MCBs in control panels