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IEVref: | 421-05-03 | ID: | |

Language: | en | Status: Standard | |

Term: | tapping factor | ||

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Definition: | the ratio U_{d}/ U_{N} (tapping factor) or 100 U_{d}/ U_{N} (tapping factor expressed as a percentage) where:
NOTE – The tapping factor expresses the relative value of the "effective number of turns" of the tapped winding at the relevant tapping, the basis 1 being the effective number of turns of this winding at the principal tapping. | ||

Publication date: | 1990-10 | ||

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VT remarks: | |||

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where:

*U*_{N} is the rated voltage of the winding

*U*_{d} is the voltage which would be developed at no-load at the terminals of the winding, connected on the tapping concerned, by applying rated voltage to an untapped winding