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What is Primary and Secondary Injection Test of CT and
Relay.
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Answer Posted / roy
primary injuction means we will inject the current in the
primary of the current transformer. and according to the CT
ratio and relay setting the relay will operate.
secondary injuction means we will disconnect the wires from
the secondary side of the CT and inject the current to the
relay directly. the relay will operate according to its
threshold.
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