The physical concept of UPS availability is the ratio of the UPS uptime to the entire time during a defined period of use. According to the whole definition to improve its availability there are two methods: one is to improve the average time without failure MTBF of UPS, and the second is to reduce the average repair time MTTR of UPS. MTBF increase to a certain level after the effect will not be obvious, and reduce the MTTR effect is very significant, the following are several ways to reduce the MTTR of UPS.
1. Strengthen the UPS power supply, especially the internal key missing maintenance; adequate spare parts to ensure its integrity; strengthen the training of maintenance personnel operating skills.
2. Use integrated design to improve the availability of UPS power supply to adapt to the needs of the power supply system composed of a variety of devices.
3. UPS power supply redundant parallel configuration, in the UPS power supply, the control circuit can be centralized as an independent pluggable module, or the power conversion section can be concentrated in a structure as a module that can be hot-swappable.
4. UPS power supply modularity plus redundant configuration, the entire UPS is divided into several parts according to the function of the circuit and designed in a structure as a pluggable module.
