Transformer OCP

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j_a_wolfe

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We have a 3 phase, 45kVa transformer being used to reduce 480V to 240V. The equipment to be run from the secondary is around 65A and is fused accordingly. The question we have is OCP and wire sizing. Do we need to calculate OCP for the maximum expected current or from the rated load?
Thanx,
Jim
 
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