1. Personnel and fire protection
2. Cable and line protection against overload and short-circuits.
3. I∆n ≤ 30 mA: additional protection in the case of direct contact.
4. I∆n ≤300 mA: preventative fire protection in the case of ground fault currents.
5. AC class –Tripping is ensured for sinusoidal, alternating currents, whether they be quickly applied or slowly increase.