Standard Series Flush Switch White Electric

Issue:
Drawings for common EX Transformers

Product Line:
LV Transformers

Environment:
Applies to Low Voltage Ventilated EX Transformers by SquareD/Schneider Electric

Cause:
Transformers for some applications require drawings

Resolution:
There is a Website set up for the purpose of obtaining Three Phase Ventilated EX Transformer drawings.  Drawings for common three phase EX type Transformers may be obtained by using this link:

http://www.schneider-electric.us/en/product-range-download/63362-doe-2016-square-d-energy-efficient-ex-transformers/?filter=business-4-electrical-distribution&parent-category-id=53700


 

A 60 Hz rated transformer can only be used on a 60 Hz system (with certain exceptions -- read further.) Whereas a 50 or 50/60 Hz rated transformer can be used on either a 50 or a 60 Hz rated system.
Exception: If the energizing voltage does not exceed 83% of the transformers nominal voltage, the transformer can be used. Remember that transformers are simple ratio devices and the output will also be lower. Another important factor to remember is that the transformer`s capacity will also have to be derated at the same ratio of the applied voltage divided by the nominal voltage.

Example: An EXN30T3H, 30kVA 480 delta to 208Y/120 transformer 60 Hz, can be utilized on a 50 Hz system as long as the applied voltage does not exceed 50/60 or 5/6 of the nominal 480, or rather 400 volts. With 400 volts 50 Hz applied, the output voltage will be 400/480 * 208 = 173 volts line-to-line, and 100 volts line-to-neutral, or 173Y/100 50 Hz. As well, the capacity or kVA of the transformer will be 400/480 * 30 = 25kVA. Transformers cannot change frequency, thus frequency in = frequency out.