IEVref:421-09-01ID:
Language:enStatus: Standard
Term: highest voltage for equipment <i>U</i><sub>m</sub> (applicable to a transformer or reactor winding)
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Definition: the highest r.m.s. phase-to-phase voltage for which a transformer or reactor winding is designed in respect of its insulation

NOTE – Um is the maximum value of the highest voltage of a system to which the winding may be connected, in respect of its insulation.


Publication date:1990-10
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