IDC's research shows that in UPS power supply, the biggest factor affecting power supply reliability is the output power distribution system, including switch tripping, fuse burnout, circuit short circuit and other power supply circuit faults: 79% originate from the gap between the UPS output and the load. Faults on the power supply line (fuse "burned out", circuit breaker "tripped", load "short circuited", "open circuit" fault caused by construction/rat bites, etc.); 11% originated from UPS and battery packs; other faults accounted for 10 %. In order to solve the fault of the power distribution circuit, it is necessary to configure the power supply of servers and other equipment into an N+X redundant power supply system, such as using a 1+1 power module. Server power redundancy is generally equipped with dual or multiple power supplies that support hot swapping. During normal operation, each power supply outputs a portion of the power on average, so that each power supply is in a relaxed load state, which is conducive to stable operation of the power supply. If one of them fails, the other servers will take over the work of the server without any impact, and will sound alarms through lights or sounds. At this time, the damaged power supply can be replaced without shutting down the system, so using hot-swappable redundant power supplies can avoid system shutdowns caused by power supply damage. In order to match the configuration of the server power supply, the best power supply solution for the IDC data center should adopt a dual-bus power supply system composed of dual-channel UPS to completely solve the single-point failure bottleneck of the power supply loop. Obviously, this dual-busbar power supply system composed of dual-channel UPS achieves the best cooperation with the dual-channel redundant power supply of servers and other equipment, and at the same time completely solves the 79% failure probability problem of power supply. In addition, the dual-busbar UPS power supply system composed of dual-channel UPS realizes the requirements of online expansion and online maintenance of the system. For single power supply equipment such as network switches, the static transfer switch STS is used for power supply. When one UPS or circuit fails, the STS seamlessly switches to the other UPS power supply circuit, which also provides dual power supply for single power supply equipment. In large data centers, in order to ensure that the availability requirement reaches 99.99999%, complete redundancy of all loops/equipment from the mains input to the load input is adopted.

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