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What does protective earthing mean

MV switchgear

In order to prevent the accidental electrification of exposed uncharged conductors of electrical equipment and cause danger,  voltage regulator is to closely connect the electrical equipment to the grounding body buried deep underground through the protective grounding wire.

Protective grounding measures should be taken for metal parts that may present dangerous voltages due to insulation damage or other reasons,such as the price of the motor, three-phase isolation transformer, switchgear, lighting appliances and other electrical equipment, should be grounded. In general low-voltage systems, the protective connection resistance value should be less than 4 ohms.
 

Date:2020-01-20 10:45

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