Patent ID: 11901724
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method for protecting a circuit including a transformer comprising:
coupling an overload fuse to a primary winding of the transformer in an AC current path of the circuit, the overload fuse rated to reduce arc flash energy at a low voltage (LV) side of the transformer;
establishing a parallel electrical connection between the overload fuse and a diverter switch that are coupled upstream from the transformer;
closing the diverter switch in advance of an inrush current;
energizing the circuit to thereby pass at least a portion of the inrush current through the closed diverter switch; and
opening the diverter switch after the inrush current has passed.