A9Y81740 SCHNEIDER ELECTRIC

The A9Y81740 is an add-on residual current device (RCD) from the Schneider Electric Acti9 Vigi iC40 series. This device is designed to enhance circuit protection by detecting residual currents, which can indicate insulation faults or other electrical hazards. It features a 3P+N (three-pole plus neutral) configuration, making it suitable for three-phase electrical systems with a neutral conductor. The device has a current rating of 40A, indicating the maximum current it can handle continuously. It is designed to trip at a residual current of 300mA, providing a balance between sensitivity and nuisance tripping. The A type classification signifies its ability to detect both AC and pulsating DC residual currents. This add-on RCD works in conjunction with a miniature circuit breaker (MCB) to provide comprehensive protection against overloads, short circuits, and earth leakage faults. It is commonly used in residential, commercial, and industrial applications to improve electrical safety and prevent electrical accidents. The Acti9 series is known for its reliability, performance, and ease of installation.