Protect people against indirect contacts and additional protection against direct contacts.
Protect installations against fire hazard due to insulation.
Faults Detectable wave form.
Tripping is ensured for slowly increasing sinusoidal AC residual currents.
Tripping is ensured for sinusoidal AC residual currents and for pulsed DC residual currents, whether applied suddenly or increasing slowly.
30mA – additional protection against direct contact
100mA – co-ordinated with the earth system according to the formula I△n＜50/R,to provide protection against indirect contacts.
300mA – protection against indirect contacts, as well as fire hazard.
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