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A 30MVA Star/Delta 66:22kV transformer is being constructed, with a LTER of 1.3, Primary cables and...

A 30MVA Star/Delta 66:22kV transformer is being constructed, with a LTER of 1.3,

Primary cables and CT are rated at 500A, secondary cables and CT are rated at 1600A

Please calculate the protection settings of the relays if differential protection is being used to protect the transformer (i.e pick up current)

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