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

Claim 17:
18. An uninterruptible power supply (UPS) module comprising:
a first module connected to a commercial power source and a battery, the first module comprising a first AC-DC converter that converts an AC current supplied from the commercial power source into a DC current, and a DC-DC converter that stabilizes a DC current supplied from the battery or converts the DC current into a DC current at a different voltage, so as to output either one of a current supplied from the commercial power source and a current supplied from the battery through a first output terminal defined by connecting an output of the first AC-DC converter and an output of the DC-DC converter to each other;
a second module comprising a second AC-DC converter that converts an AC current supplied from a standby power source into a DC current to output the converted DC current; and
a second output terminal defined by connecting the first output terminal and an output terminal of the second module to each other to supply a DC current output from either one of the first module and the second module to a load,
wherein in the second module, breakers and silicon controlled rectifier elements paired with each other are connected in parallel between an output terminal of the second AC-DC converter and the second output terminal, and
wherein in the breakers and the silicon controlled rectifier elements paired with each other, one breaker and one silicon controlled rectifier element are paired with each other to connect in parallel between the output terminal of the second AC-DC converter and the second output terminal.