Patent ID: 11909258
Assignee: SCHNEIDER ELECTRIC IT CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 25:
26. A power supply comprising:
an input configured to receive input AC power;
an output configured to provide output AC power to a load;
at least one power converter coupled to the input and configured to convert the input AC power into the output AC power; and
a controller coupled the at least one power converter, the controller being configured to:
detect a change of at least one parameter of the input AC power;
detect a change in the output AC power in response to detecting the change of the at least one parameter of the input AC power; and
determine that a fault has occurred based on the detection of the change in the output AC power, wherein the fault provides an indication that contacts of at least one relay included in the power supply are welded or shorted together.