Reactor type OLTC

E-lesson: OLTC Course – e-lesson #3 – Reactor type OLTC

Course: Intermediate level

This is the third e-lesson in the entire course, and the second one on the Intermediate level. To subscribe to the level that best suits your needs, please see the options here.


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In this e-lesson you will learn of reactor type tap changers, the difference between double and single contact designs, operation of a transfer switch and arcing tap switch. Dr. Levi as one of the world’s leading experts in diagnostics of OLTC in a  high voltage oil-filled power transformers, will explain principles of operation of reactor type tap changer applied to power transformers, as well as a brief preview of the future sessions.

Keywords: OLTC,  transformer, preventive autotransformer

Raka Levi

Dr. Levi spent his entire career in diagnostic testing transformers and other substation apparatus, while the last 15 years dealing with tap changers. He is senior member IEEE and vice-chairman of the working group for revision of Guide for testing power transformers. Raka Levi consulted clients on all 5 continents in the field of condition assessment and substation monitoring.

Raka Levi

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