Unearthed (or impedance-earthed) neutral –IT
Note :
In IT system, the neutral from the transformer is isolated to the earth and the metallic parts of equipment are connected to the earth ground. In case of electric fault, there is no danger, but if there are two simultaneous faults, this will be a short circuit and proper device should open the faulty circuit.
2.1. Principle
Situation on one Fault
Situation of 2 faults
