Also found in: Encyclopedia, Wikipedia.
Related to autotransformer: autotransformer starter


An electrical transformer in which the primary and secondary coils have some or all windings in common.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Electrical Engineering) a transformer in which part of the winding is common to both primary and secondary circuits
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɔ toʊ trænsˈfɔr mər)

a transformer having a single coil that serves as both a primary coil and a secondary coil.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
According to the report, starting from autumn 2018, the station took appropriate measures in the hydraulic units, replaced the spare parts at the second hydraulic unit, and completely repaired the 330-kilovolt block autotransformer.
According to available documents, the tender has been given to the third lowest bidder for the purchase of an autotransformer bank, who offered the bid of $8.89 million.
Various technologies are used in power conditioning services for instance; autotransformer, inverter, buck boost transformer, battery, isolation transformer etc.
This paper presents the design and analysis of a double zigzag-connected autotransformer based 24-phase ac-dc converter which supplies direct torque controlled induction motor drives (DTCIMD's) in order to have better power quality conditions at the point of common coupling.
A polygon autotransformer based 30-pulse ac-dc converter is introduced in [24] which has 5 inter-phase transformers in the dc link.
New chapters cover autotransformer design, common-mode inductor design, series saturable reactor design, self-saturating magnetic amplifier, and designing inductors for a given resistance.
The contract covered the building of a power supply system for a new high-speed railway link between London and the English Channel Tunnel, including three feeder substations and four autotransformer stations, ABB said.
An autotransformer with a 220/110 kilovolt voltage and a force of 200 megavolts has been installed at the power plant.
The poles prior to installation: Installation of poles: The administrative building is under construction: Protection and control equipment: Autotransformer: Photos: Tazabek