Patent ID: 11967858
Assignee: LS ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. The UPS module of claim 13, wherein the third power supply control module comprises:
first and second silicon controlled rectifier elements connected between positive and negative output terminals of the second AC-DC converter and positive and negative output terminals of the third power supply control module, respectively;
first and second bypass electric circuits connected between an input terminal and an output terminal of each silicon controlled rectifier element to bypass the first and second silicon controlled rectifier elements, respectively;
first and second breakers that open or close the first and second bypass electric circuits; and
a switch provided with a switch control unit that turns on the first and second silicon controlled rectifier elements to conduct currents therethrough, controls the first and second breakers to close the first and second electric circuits when the conduction signal is received, and turns off the first and second silicon controlled rectifier elements when the first and second bypass circuits are closed while currents are first conducted through the first and second silicon controlled rectifier elements according to an operating speed difference between the silicon controlled rectifier element and the breaker.