Protection zero

The metal part of the electrical equipment that is normally uncharged is connected to the neutral line in the system as a good metal connection, called protection zero. As a technical measure taken to prevent the risk of personal electric shock. The protection and zero connection application is in the neutral point grounding system. When the electrical equipment is hit by the shell, it constitutes a single-phase short-circuit fault, which causes the protection device to operate reliably and quickly, disconnecting the faulty equipment power supply and avoiding the risk of electric shock.