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

Claim 31:
32. A control circuit communicatively connected to a transformer protection circuit including a direct current blocking component electrically connected between a transformer neutral and a ground and a switch assembly electrically connected in parallel to the direct current blocking component, the control circuit comprising:
a programmable circuit;
a memory storing instructions executable by the programmable circuit, the instructions causing the control circuit to perform a method comprising:
initiating operation of the control circuit in a selected mode, the selected mode being operator-selectable from between an automatic mode and a manual mode;
in the automatic mode:
operating to automatically actuate the switch assembly from an open position to a closed position in response to one or more grounding conditions using grounding code to establish a solid metallic path from a transformer neutral to ground;
operating to automatically actuate the switch assembly from the closed position to the open position in response to one or more blocking conditions using blocking code to disconnect the solid metallic path between the transformer neutral and ground;

in the manual mode:
operating to maintain the switch assembly in a closed position using manual closed code, thereby maintaining the solid metallic path between the transformer neutral and the ground regardless of presence of the one or more blocking conditions; and
operating to maintain the switch assembly in an open position using manual open code, thereby maintaining disconnection of the solid metallic path between the transformer neutral and the ground regardless of presence of the one or more grounding conditions.