Power Systems & Controls’ “Ring Bus” is a name for a clever UPS network configuration. PS&C’s Ring Bus system consists of a standard Hybrid Rotary, reverse transfer modules with extra current sensing for paralleling, a Ring Bus Controller (RBCC) for supervision of the module (Each RBCC has a PLC and a backup PLC to insure redundancy and reliability in the control of the node), system switchgear, and a Central Controller, which serves as a system control interface.

Ring Bus systems are normally designed such that N+1 UPS modules will support the total system load. This allows a module to be removed from the bus for maintenance without reduction of the total amount of conditioned power supplied to the load. In the event that fewer than the required UPS modules is available to support the load, the flexible Ring Bus allows some load to be supported by the utility or alternate source while supplying conditioned power to the remainder of the critical load. Such capability does not exist in normal paralleled UPS systems.

Ease of growth is the most outstanding feature of the Ring Bus. Additional modules are installed, wired, ad tested on-site before any connections are made to the Ring us. When the new modules are ready, the Ring Bus node breakers can be closed and the new modules brought on line – with no interruption to the critical load.

Power Systems & Controls 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. PS&C has the unique ability to support both static (solid-state) and rotary (motor generator) UPS, frequency converter, and power conditioning requirements as we are one of the few companies in the world that manufactures both types of technology. Power Systems & Controls is an employee owned company and has a long history of successfully supporting mission critical applications across the world. PS&C – The Power Is On!

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 was founded in 1965 by CAT. Today the company is headquartered in Richmond, VA and supports the USG and DOD, Fortune 500, and many other international organizations on a range of applications. We don’t just solve power problems; we engineer power solutions.