Fault current

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A fault current is an electrical current that flows through a given fault location due to an insulation fault ( Internationales Elektrotechnisches Wörterbuch - IEV 603-02-27 ). The current strength of the fault current depends on the loop impedance .

To calculate the fault current, depending on the type of fault and fault location, the resistances of the transformer, the conductor resistance , grounding resistances , body resistances , the resistance of the person touching the fault location and, if necessary, other contact resistances must be taken into account.

If a residual current circuit breaker is installed in the circuit and the required rated differential current is reached, the circuit breaker switches off the circuit on all poles.

See also

Individual evidence

  1. Kiefer, Gerhard: VDE0100 and practice. 13th revised and expanded edition. VDE Verlag, Berlin / Offenbach 2009, p. 102f.