Without automatic disconnection of the supply
This can be done by three ways:
- Class II equipment
- Isolated circuits
- Very low voltage
Means to protect
Definition : Protection by class II equipment
A class II equipment in addition of the main insulation has a double insulation.
Definition : Protection by Isolated circuits
The principle of this protection is by using transformer to isolate circuits. The second circuit is completely isolated from the earth and from the power supply.
Definition : Protection by using Extra-low voltage
The protection is ensured by the use of a voltage under 50 V in AC, voltage under this there is no danger for people.
Voltages Range from IEM
