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277V is sometimes necessary from a 240V source
Applies to Buck and Boost Transformers by SquareD/Schneider Electric
277V is a common voltage for Fluorescent Lighting Ballasts
Yes, Buck & Boost Transformers can be wired for 13.3% change to boost 240V to 272V using wiring diagram #4 in the Buck & Boost Transformer literature, or the Online Buck and Boost Calculator. See link below.
WARNING: This connection will usually result in both lines being `live`. Some 277V Fluorescent Lighting Ballasts and maintenance personnel who work on them expect one of the lines to be a neutral with insignificant voltage to ground. Load equipment damage or personal injury could result in such applications.
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