Answer Posted / matt

Given a system power factor of 0.9, PFC unit of 50kvar we can work out the following

50/0.9 = 56 A real current

56^2 * 50^2 = 75 A apparent current

Cable capacity - 75 * 1.35 = 100 A

Factor of 1.35 used for over rated capacitors as per
industry standards.

Breaker shall be rated at less than the cable capacity but greater than 75A. Increase cable size to suit breaker breaker sizing if required.

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