Patent ID: 7045914

Claim:
A system for providing continuous power supply, the system comprising: a plurality of primary uninterrupted power supplies (UPSs) for providing power supply to electrically powered devices connecting with the primary UPSs; at least one standby UPS connected to the electrically powered devices for providing power supply in the case of malfunction on any of the primary UPSs; a switch device connected to the at least one standby UPS for switching over operational states of the at least one standby UPS; and a monitoring device connected to the primary UPSs, the at least one standby UPS, the electrically powered devices and the switch device, for collecting information from and giving instructions to the primary UPSs, the at least one standby UPS and the electrically powered devices, the monitoring device comprising a programmable monitoring module for collecting information, a shutdown controlling module for giving shutdown instructions, and a switch controlling module for controlling the switch device; wherein, the shutdown controlling module is for sending out a shutdown instruction to shutdown the system when the programmable monitoring module detects that the number of malfunctioned primary UPSs exceeds the number of standby UPSs.