In safeguarding critical facilities from power disruptions, the use of uninterruptible power supplies (UPS) is a common practice. To address both short term and long-term outages, UPS systems are often augmented with external diesel generators or integrated with a diesel engine in a Diesel Rotary UPS (DRUPS).

Modern Rotary UPS unit blend reliability and efficiency, employing synchronous machines and digital controls for high reliability and user-friendly interfaces. Achieving efficiency levels of up to 97%, Rotary UPS systems minimize energy losses and often eliminate the need for active cooling, resulting in cost-effective operation. While initial investment costs might be higher than static options, their reduced maintenance complexity, extended lifespan, and efficiency lead to significant long-term ownership cost reduction.

Rotary UPS systems are adaptable to both low and medium voltage scenarios, accommodating energy storage from batteries or flywheels. Paralleling Rotary UPS units to enhance power output or redundancy is straightforward due to their synchronous generator design, requiring minimal complex regulation. This enables Rotary UPS to delivery consistent power output across various load conditions without requiring derating. This flexibility contributes to their reduced footprint, making valuable space available for other equipment or production areas.

Statistics show that most power outages last less than three seconds. Flywheel UPS units can bridge over 96% of these outages, while battery systems cover an additional 3%. To address a broader range of failures, combining short-term energy storage with a longer-term bridging solution like diesel generators is essential. The integration of such systems provides a comprehensive approach to ensuring uninterrupted power during any scenario.

The integration of Rotary UPS with diesel generators can take various forms. Diesel generators connected upstream provide backup power during outages and can be operated in parallel, enhancing reliability. Combining Rotary UPS with diesel generators downstream offers unique advantages. This configuration involves precise power sharing between the UPS’s energy storage and the diesel generator, resulting in seamless transitions and stable frequency control. Moreover, downstream-connected diesel generators offer independent maintenance possibilities, ensuring continuous operation even during servicing.