Originally completed in 2005, the data center underwent an infrastructure expansion in 2014 to address the growing IT demand and increased load density. In 2018, Fannie Mae became aware that the existing Engine-Generator PLC-based control system had been phased out and needed replacement. In 2019, TiePoint-bkm was engaged as the Engineer of Record for this multi-phase design and commissioning effort.
The new control system is designed to support the continuous operation of the UTC facility to meet Fannie Mae’s business continuity requirements. The existing UTC power distribution system is concurrently maintainable from the point of 34.5kV interconnection at the utility substation down to the 480V distribution substations inside the UTC facility. The Control System provides automated control and monitoring of medium-voltage and low-voltage switchgear, including onsite diesel generators and UPS systems, to protect against loss of utility power and to maintain reliable power to UTC critical IT loads and overall facility loads to the extent possible.
The design provides for the automated and manually-initiated auto sequences for operating circuit breakers and onsite diesel generators in response to a partial or total loss of utility power, power system faults, equipment failures, equipment isolation for maintenance, and emergency operating procedures. Regarding the utility source, the design ensures that the two utility sources are never paralleled together. All closed transition transfers that occur between Utility-A and Utility-B will involve the generator plant as an intermediate step, with only one utility source at a time operating in parallel with the generator plant.