Applied Power and Controls engineering expertise were called upon due to recent failure of the transformer for one of the incoming high voltage power feeds for the Waste Water Treatment plant has forced DWSD to temporarily divert a transformer from the Imlay City project while a permanent replacement was repaired.

The Imlay City transformer was smaller than the original WWTP transformer. As a result, DWSD had concerns that the transformer will be too small for operation in all conditions. APC submitted Power Systems Report that addressed the conditions under which the transformer may be exposed to, whether the transformer is capable of handling those conditions, and how to mitigate the system in the event that the transformer is not capable of handling certain conditions. In addition, report included temporary relay settings for the main breaker selected, and a short circuit study of the13800 V buses performed.