Patent ID: 11923129
Assignee: TECHHOLD LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 26:
27. A method of operating a transformer protection circuit, the method comprising:
monitoring a voltage at a transformer neutral of a transformer positioned within the power grid, the transformer neutral being electrically connected to a direct current blocking component that electrically connects the transformer neutral to a ground;
based on a direct current voltage at the transformer neutral being below a predetermined threshold, determining whether an electrical condition exists to actuate a switch assembly to close to form a bypass path between the transformer neutral and the ground, the switch assembly being operable in a first mode or a second mode; and
based on the direct current voltage at the transformer neutral being above the predetermined threshold, overriding the determination of whether to actuate the switch assembly, thereby maintaining the switch assembly in an open position and eliminating the bypass path regardless of whether the switch assembly is operating in the first mode or the second mode;
wherein, in the first mode, the switch assembly operates in a normally-closed state and opens to remove a bypass path from between the transformer neutral and the ground based on detection of a triggering event, the bypass path bypassing the direct current blocking component; and
wherein, in the second mode, the switch assembly operates in a normally-open state and closes to form the bypass path between the transformer neutral and the ground based on detection of a second triggering event.