Live Webinar Series


The NETA Live Webinar Series is a collection of association-approved virtual training presentations sponsored by industry partners and eligible for 1 NETA CTD credit. Each one-hour webinar will be presented live, but will also be made available for viewing on-demand through the NETA Bookstore. These webinars will cover a variety of relevant topics, are available free of charge to NETA Accredited Companies, and are also made available for purchase by Alliance Partners ($75) and Non-Members ($99).

Working Principles of Transformers
APRIL 28, 2021 | 1:00 PM EST

An electrical power transformer is a static device which transforms electrical energy from one circuit to another without any direct electrical connection and with the help of mutual induction between two windings. It transforms power from one circuit to another without changing its frequency but may be in different voltage level.

This webinar provides a simple definition of transformers, as we will go through this session we will understand more clearly and deeply what is a transformer? How does it operate? What tests are performed on a transformer and what value do the tests offer? Topics will include:

  • Magnetism & Electromagnetism
  • Electromagnetic Induction
  • What is a Transformer?
  • How does a Transformer Work?
  • Power Transfer
  • Transformer Configuration
  • Transformer Ratings
  • Tests Performed for reliability assessments




Thomas Sandri received his BSEE from Thomas Edison University in Trenton, N.J. He has been active in the field of electrical power and telecommunications for over 30 years. He has been directly involved with and supported test and measurement equipment for over twenty years and is considered an industry expert in application disciplines including battery and dc systems testing and maintenance, medium and high voltage cable, ground testing, and partial discharge analysis