Leakage current resistant residual current breaker

摘要

The breaker has three phase conductors (L1, L2, L3), a neutral conductor (N), and a total current transformer for detecting total current through the phase conductors and the neutral conductor. A functional conductor (FE) conveys functional conducting current that is guided through the total current transformer and contributes to the total current. Independent claims are also included for the following: (1) a supply system with a phase conductor and a neutral-conductor (2) a method for detecting a residual current.