Sizing a Transformer
Sizing a Transformer
(OP)
I want to size a Transformer for a Water treatment plant.
Should I sum up all connected loads or any factor should be considered?
any material or document reference woulde be appreciated.
Regards
Should I sum up all connected loads or any factor should be considered?
any material or document reference woulde be appreciated.
Regards






RE: Sizing a Transformer
For a water treatment plant, the motor load probably is the larger among all other loads. An estimate motor load could be determined considering the horsepower, power factor, pump and other equipment efficiency.
Probably a good idea is to have a least a redundant transformer connected to different sources and split the load evenly under normal conditions. One transformer should be capable to run the entire plant without overheating.
RE: Sizing a Transformer
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The Electric code in the countyr of application must have a way to calculate the power estimation for the structure (usage and simultaneity factors chosen according to regulations instead of you taking responsibility). Any factor above 80% of total "installed" load is better than, and hence a conformity, with any requirement i know of.
RE: Sizing a Transformer
As already mentioned, a water treatment plant is usually considered to be a critical load. You should allow for redundent transformers and switchgear to ensure no prolonged outages. You may need to talk to the supplying utility about having two different feeders suppying this load (ideally from different substations or different substation buses).
RE: Sizing a Transformer