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Reliability Analysis of the APC Symmetra MW Power System
MTechnology, Inc. (MTech) performed a quantitative reliability analysis of the APC Symmetra MW UPS. The results allow APC to focus its engineering, manufacturing, and field service resources where they will be most effective in further improving system reliability. The study included an exhaustive analysis of the system’s architecture, component selection, control system, manufacturing practice, and response to internal and external faults. The study also included a detailed review of APC’s delta conversion online topology.
The study showed that system mean time between failures (MTBF) can exceed 1 million hours when operated with a redundant power section. This figure includes all equipment failures, including those attributable to causes beyond APC’s control, such as failures in the battery plant or electric utility.