E-lesson

Transformer Testing Course – E-LESSON #2 – Measurement of voltage ratio and check of phase displacement

This is the second e-lesson in the Transformer Testing Course at the Transformers Academy, hosted, authored and presented by Balazs Sztari.

Basic level
Illustration - 850 x 400
Basic level

Hosted by: Balazs Sztari / Free

This lesson covers the measurement of voltage ratio and phase displacement on power transformers. It explains the importance of these tests, which are mandatory according to industry standards. The lesson discusses different methods for measuring voltage ratio, including the voltmeter, bridge, and ratio meter techniques. It also covers how to check polarity and phase displacement, emphasizing the need to properly prepare the transformer before testing. The lesson highlights the evaluation of test results, including the acceptable deviation limits specified in standards. It compares the requirements between IEC and IEEE standards, noting differences in terminology and criteria. The lesson concludes by mentioning that additional questions will be answered offline or in future lessons.

 

Subscribe to this course
If you are already a subscriber of the Transformers Academy or Transformer Magazine, please log in with your credentials. Login

While the first e-lesson offered some basic information about standards, procedures and evaluation methods of factory acceptance testing of power transformers, in the second e-lesson you will have the opportunity to learn about definitions, test circuit requirements, procedures and results evaluation of voltage ratio and phase displacement measurement on transformers.

Keywords: power transformers, transformer testing, voltage  ratio measurement, turns ratio measurement, check of phase displacement 

Recommended browsers for the registration: Chrome, Edge, Mozilla, Safari

In order to ensure that your registration was successfully completed, please, after applying for the e-session, carefully check the inbox of the email account you are using. If you don’t see the confirmation email, please check your spam / junk folder as well. If the confirmation email is in that folder, please, move it to your inbox. This should eliminate any future issues with the registration process.

Also, we recommend checking firewall settings with your network provider.

To access the e-lesson, use the room link and the password provided in the confirmation email.

About the author

Balazs Sztari

Balasz Sztari

CG Electric Systems Hungary

Balazs is the head of Testing and Quality Control department at CG Electric Systems Hungary (formerly Ganz) who produces power transformers and rotating machines. He joined the company in 1999 after he graduated as electrical engineer in Budapest. Beside of factory acceptance tests, his team performs commissioning, diagnostics and R&D tests on power transformers and rotating machines. He is currently a member of Cigre A2.53 working group.