Issue:
Backfeeding Transformers
Product Line:
LV Transformers
Environment:
Applies to Low Voltage Transformers by SquareD/Schneider Electric
Cause:
Industrial Control Transformers used as step-up Transformers
Resolution:
No they cannot. Industrial Control Transformers terminals are specifically marked ``primary`` and ``secondary``. As such, the National Electrical Code (NEC) and Underwriters Laboratories (UL) prohibit connecting the source to other than the primary terminals. Also, since Industrial Control Transformers utilize compensated windings to accommodate the high regulation inherent in such small Transformers, the resulting voltage ratio would be lower than desired. In other words, if a Control Transformer were reverse fed, the output voltage would be lower than desired.
Backfeeding Transformers
Product Line:
LV Transformers
Environment:
Applies to Low Voltage Transformers by SquareD/Schneider Electric
Cause:
Industrial Control Transformers used as step-up Transformers
Resolution:
No they cannot. Industrial Control Transformers terminals are specifically marked ``primary`` and ``secondary``. As such, the National Electrical Code (NEC) and Underwriters Laboratories (UL) prohibit connecting the source to other than the primary terminals. Also, since Industrial Control Transformers utilize compensated windings to accommodate the high regulation inherent in such small Transformers, the resulting voltage ratio would be lower than desired. In other words, if a Control Transformer were reverse fed, the output voltage would be lower than desired.
Released for:Schneider Electric Canada
