● General
   ● Protect people against indirect contacts and additional protectionagainst direct contacts
   ● Protect installations against fire hazard due to insulation faults

● Detectable wave form
   ● AC Class
      Tripping is ensured for slowly increasing sinusoidal AC residual currents
  ● A Class
     Tripping is ensured for sinusoidal AC residual currents and for pulsed DC residual currents,whether applied suddenly or increasing slowly
● Tripping sensitivity
    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 harzard