SCHNEIDER A9R71440 Residual Current Circuit Breaker (RCCB) Type AC 4P 40A 10mA

RCD Circuit Breaker SCHNEIDER A9R71440 Earth Leakage Protection Device RCCB Type AC 4P 40A 10mA
The SCHNEIDER A9R71440 is a residual current circuit breaker (RCCB) in the Acti 9 iID product range, specifically designed for 3-phase electrical systems to play a vital role in protecting lives and property from the dangers of electrical leakage. Featuring 4P 40A specifications and a 30 mA detection sensitivity, the A9R71440 can trip the circuit quickly (instantaneously) when detecting earth leakage current exceeding potentially lethal limits according to international standards. It is therefore ideal for installation in Main Distribution Boards (MDB) or sub-distribution boards in medium-sized buildings and small industries using 3-phase power. This RCCB model is Type AC, capable of detecting standard sinusoidal AC leakage currents, and operates on a voltage-independent principle, ensuring reliable operation even during system voltage fluctuations. Furthermore, the A9R71440 boasts high durability with an electrical endurance of up to 15,000 cycles and mechanical endurance of 20,000 cycles, along with a conditional rated short-circuit breaking capacity of 10 kA, demonstrating its robustness and reliability when coordinated with miniature circuit breakers (MCBs) to provide a complete and maximally safe protection system.

Specifications
- Personal protection: 30 mA sensitivity is the ideal rating for protecting individuals against direct electrocution from leakage current passing through the human body.
- VisiTrip: Features a red mechanical indicator on the front of the device when tripped by an earth leakage fault, allowing quick identification and locating of the faulty device to reduce intervention time.
- Type AC Protection: Suitable for detecting alternating sinusoidal leakage currents commonly present in general lighting circuits and standard appliances.
- Voltage Independent Operation: The tripping mechanism is voltage-independent, ensuring the device operates reliably even in the event of voltage drops.
- High Durability: Offers high endurance of up to 20,000 mechanical cycles and 15,000 electrical cycles.

Applications & Usage
- Large residential and commercial buildings: Used in main distribution panels or sub-distribution boards (Consumer Units/Distribution Boards) of 3-phase systems to prevent electric shock in common areas or high-risk zones.
- Light industry: Used to protect machinery, equipment, or sub-circuits at risk of earth leakage in facilities equipped with 3-phase power systems.
- High-humidity areas: Used in circuits supplying power to wet areas such as bathrooms, kitchens, swimming pools, or laundries to prevent contact hazards.
- General power receptacle circuits: Installed to protect against hazards from appliances that may develop earth leakage, such as refrigerators, washing machines, or power tools.
- Outdoor area protection: Used for circuits supplying power to outdoor lighting, water pumps, or external socket outlets.