PS&C recently shipped an UPS system with innovative load management. This innovation was part of the control logic installed in a ring bus UPS system shipped by PS&C. Previously, a ring bus was configured with “X” modules with “X-N” modules required to support the total load. When the number of modules removed (for any reason) from the ring bus exceeds “N”, the ring bus logic was required to split the ring bus. Splitting the ring bus puts part of the load on utility, while the remainder remains on the UPS. This happened because the PLC logic must make a blind decision to split the ring bus whenever the number of modules supporting the load is less than “X-N”.

This condition has been improved by the addition of PS&C’s optional “Intelligent Load Management System” for ring bus applications. By measuring the power required by each load node on the ring bus and measuring the output power of each module, the PLC has a complete picture of available power and total load. With a complete picture the PLC can determine the actual number of UPS modules required to support the actual load. It is not possible in a ring bus system to keep clean UPS power to the User’s load under more scenarios due to PS&C’s “Intelligent Load Management System”.

About PS&C 

Power Systems & Controls is a world leader in power quality and power protection technology, building systems for mission critical applications world-wide. Clients include many of the world’s leading research and test laboratories, rail and sea mass transit, advanced manufacturing, and data centers.

The company has a state of the art production and test facility located in Richmond, VA allowing for easy access to Washington, DC and the east coast. Today the company supports the USG and DOD, Fortune 500, and many other international organizations on a wide range of applications. We don’t just solve power problems; we engineer power solutions.