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

Claim 18:
19. The UPS module of claim 18, wherein the second module is provided with a switch, the switch comprising:
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 second 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 control the opening or closing of the first and second bypass electric circuit; and
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 bypass electric circuits when a preset conduction signal is received, allows currents to be 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, and turns off the first and second silicon controlled rectifier elements when the first and second bypass electric circuits are closed while the currents are conducted through the first and second silicon controlled rectifier elements.