ABB PLC Module 3BSE000468R1 PFBK 168/3BSE001654R1 Module

ABB Related Description
Residual current releases Both circuit-breakers and switch-disconnectors are pre-engineered for assembly combined with residual current releases. Residual current circuit-breakers derived from the circuit-breaker are known as “mixed”, meaning that, besides protection against the typical overloads and short-circuits of circuit-breakers, they also provide protection for people and against earth fault currents, thus protecting against direct, indirect contacts and the risk of fires. Residual current circuit-breakers derived from the switch-disconnector are “pure” residual current circuit-breakers, i.e. they only provide residual current protection and not the protections typical of circuit-breakers. “Pures” residual current circuit-breakers are only sensitive to earth fault current and are generally used as main switches in small panels for distribution to end-users. The use of “pure” and “mixed” residual current circuit-breakers allows the insulation state of the installation to be continuously monitored. It ensures efficient protection against the risks of fires and explosions and, in the case that detects fault at IΔn<30mA devices, also protects people against indirect and direct contacts, thereby integrating the compulsory measures established by the accident prevention standards and regulations. The residual current releases comply with the full

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