Subscribe
Subscribe to Magazine
×
×

We’re here to support you, no matter your location. Searching for the appropriate contact?

Unsure about who to reach out to with your questions or issues?

Discover the right person to contact in our contact directory.

Headquarters Worldwide contact






    Trending
    中文
    E-lesson

    Transformer Testing Course – E-LESSON #3 – Winding resistance measurement

    Transformer testing course - e-lesson #3
    Course: Basic level

    Hosted by: Balazs Sztari / Free

    This lesson is hosted by Balazs Sztari and it is counducted at the Basic level.
    The measurement of ohmic resistance between the terminals of a power transformer is a tool of key importance for production quality control, factory acceptance test, diagnostics and condition assessment.

    This lesson covers the importance and methods of measuring winding resistance on power transformers. It explains how winding resistance includes factors beyond just the conductor, such as joints and tap changer contacts. The presentation details techniques to reduce stabilization time during resistance testing, including using external resistors and higher test voltages. Proper temperature measurement and correction is emphasized for accurate results. The lesson also discusses preparing the transformer, the test procedure, and evaluating results to detect issues like winding asymmetry. Examples are provided showing how resistance testing can identify faults like tap changer problems. The key differences between IEC and IEEE standards for this test are summarized at the end.

    Unauthorized message

    Subscribe to this course!

    If you are already a subscriber of the Transformers Academy or Transformers Magazine, please, Login with your credentials.

    In the third lesson of the Transformer Testing Course, you will learn about the techniques and method of this test.

    Keywords: power transformers, transformer testing, ohmic resistance, winding resistance, measurement

     

    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

    Balazs 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.

    Subscribe to Magazine!
    Subscribe