Ground or Earth fault protection Relay- RCB, RCD

Connection types of Ground / Earth fault protection:

In star point of a over current relay-

Ground fault relay connection in star point of  over current relay
Ground fault relay connection in star point of over current relay

In Secondary of a ring type Current transformer

Ground fault relay connected to secondary of ring type current transformer
Ground fault relay connected to secondary of ring type current transformer

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In neutral point of a Generator, Power Transformer, Motor

Ground fault relay connected to star point of power transformer or a Generator / or a motor
Ground fault relay connected to star point of power transformer or a Generator / or a motor

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