What is Square D's standard tap offering on low voltage dry type distribution transformers with primary voltages at or below 277 volts?
Is there standard Tap offerings for transformers less than and equal to 277V Primaries?
Product Line:
LV Dry Type Transformers
Environment:
Application
Cause:
Product features
Resolution:
Square D offers as a standard for primary voltages from 190 through 277 volts two 5% full capacity below nominal (2 - 5% FCBN) taps. Square D also offers the transformer without taps, or with two 5% taps, one full capacity above nominal and one full capacity below nominal (2-5% 1+1-).
Square D offers the 2-5% FCBN tap at this voltage range as it makes the most sense, both commercially and from an application standpoint.
Taps are not usually changed on a transformer for small variations in voltage. When your input voltage is 277 volts or below, it is not likely that a tap would need to be changed until the difference approaches 5%. Also, having both taps below is the most useful as if the voltage varies from nominal in most systems in this range, it tends to be on the low side.
Note: Square D does not offer taps on transformers below 10kVA, except as noted in the Digest.
Publicado para: Schneider Electric Mexico
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