MODULAR SOLID STATE UNINTERRUPTIBLE POWER SYSTEM.
FEDERAL AVIATION ADMINISTRATION WASHINGTON DC SYSTEMS RESEARCH AND DEVELOPMEN T SERVICE
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This report shows that the requirements for a Modular Solid State Uninterruptible Power System UPS, as described in Specification FAA-ER-450-012, can be met using solid-state-circuit and inverter techniques available today. Each module will consist of a rectifier-battery-inverter assembly capable of operating from either commercial power, standby engine generators or internal battery power, and deliverying continuous, uninterruptible, regulated, three-phase a-c power to it load. The UPS must be designed so that each module of a typical four-module system will have an MTBF of the order of 1100 hours and an MTTR of one hour to meet the system MTBF requirement of 100,000 hours. The UPS must also be designed so that the output voltage during all switching and fault clearing operations falls within a voltage-time envelope which the electronic load equipment can tolerate. Author
- Electric Power Production and Distribution