FIRCDSchutzschalter

FIRCDSchutzschalter is a protective electrical device designed to automatically disconnect a circuit when fault conditions are detected. It combines residual current protection with overcurrent protection in a single unit, intended to improve safety and simplify wiring in residential, commercial, and light industrial installations.

Operation: The device monitors current in live and neutral conductors. A current imbalance indicates leakage to earth, triggering the device to interrupt supply when leakage exceeds its rated IΔn. It also detects overcurrent or short-circuit conditions and trips via thermal-magnetic mechanisms or electronic trip logic. Some variants offer remote signaling or selective tripping.

Technical characteristics: Typical rated currents range from 6 to 125 amperes, with breaking capacities from 6 to 25 kiloamperes. The residual operating current IΔn commonly spans 10, 30, or 100 mA. Tripping curves are usually B, C, or D to suit different load types. Devices are designed for DIN rail mounting and feature modular housing; many include diagnostics and optional communication interfaces.

Applications: FIRCDSchutzschalter are used as main protection or branch-circuit protection in buildings and facilities where combined leakage and overcurrent protection is advantageous, and where space or simplicity considerations favor a single device.

Standards: They are designed to comply with IEC 61009 for residual current devices and IEC 60898/60947 for overcurrent protection, as well as national standards. Proper installation and testing should be performed by qualified personnel in accordance with local electrical codes.