A 1970s-era data
processing facility has always had sufficient on-site
standby power until recently, when load growth projections dictated the
need for additional backup. Under
this project, we incorporated another 2.5 megawatts of standby power
into the electrical
distribution system.
CPS Engineering
performed a top-to-bottom analysis of the electrical
distribution system and recommended a complete replacement of the
controls. Automatic transfer switch control panels with PLC backbone
replaced switched circuit breaker
operations using relays, and
redundant paths for power transfer were installed to eliminate single
points of failure. We reviewed and modified protective relaying
settings, and low voltage circuit breakers were rebuilt to our
specifications and equipped with digital trip units to improve
coordination characteristics.
