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What is the difference between earth fault protection and earth leakage protection?

Earth fault protection is intended to protect equipment when an insulation fault occurs, for instance a direct contact between a life conductor and earth. In such a situation, great fault currents will flow back to the transformer through its neutral point when its connected to earth (we can use SGR + MDGF module for detection). 
This is not the case of earth leakage protection, where faulty currents are generally much lower and the protection is dedicated, for example, to avoid hazards to human beings or animals
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