Learn about relevant standards, test and evaluation methods, and requirements for test equipment of no-load loss and current measurement of power transformers.
You can select the level of this course which suits your needs best. To see the entire syllabus, take a look at the Transformer testing course brochure.

Transformer Testing Course – E-LESSON #1 – Introduction
This will be the 1st lessons in the series of transformer testing, and it might be extended with detailed and specific topics.
VIDEO | PRESENTATION
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.
VIDEO | PRESENTATION
Transformer Testing Course – E-LESSON #3 – Winding resistance measurement
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – E-LESSON #4 – Short-circuit impedance and load loss measurement
Learn about standards, test and evaluation methods, and requirements for test equipment of short-circuit impedance and load loss measurement of transformers.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #5: No-load loss and current measurement
In the fifth lesson of Transformer Testing Course, you will learn about the basics and techniques of these tests with the usual detailed explanations.
VIDEO | PRESENTATION
Transformer Testing course – e-lesson #6: Dielectric tests on power transformers
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #7: Lightning impulse test (part I)
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #8: Lightning impulse test (part II)
The 2nd part of lightning impulse testing lesson, with focus on waveshape control and evaluation of oscillatory and high overshoot LI waveforms.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #9 Switching Impulse Test
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer testing course – e-lesson #10: Applied voltage test
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #11: Line terminal AC withstand voltage test (LTAC)
This chapter of the Transformer Testing Course details the line terminal AC withstand voltage test of power transformers. You will learn about IEC and IEEE standard requirements, test connections, testing techniques, and failure cases.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #12: Induced voltage test and PD measurement
This chapter contains the most important information about induced voltage testing and partial discharge measurement on power transformers.
VIDEO | PRESENTATION
Transformer Testing course – e-lesson #13: Temperature rise test
This is the 13th e-lesson in the Transformer testing course
VIDEO | PRESENTATION
Transformer Testing Lesson -e-lesson # 14: Sound level measurement
This is the 14th e-lesson in the Transformer testing course.
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #15: Measurement of zero-sequence impedance
This is the 15th lesson in the Transformer Testing Course, hosted by Balazs Sztari. It deals with important parameter for three-phase electrical network design.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #16: Insulation resistance measurement
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #17: Capacitance and dielectric dissipation factor measurement
In this lesson, you will learn about the AC insulation test method for the capacitance and loss factor. Lesson is hosted on Master's level.
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #18: Testing of tap-changers and built-in current transformers
The 18th lesson of the Transformer testing course is hosted and authored by Mr. Balazs Sztari at Mater's level.
VIDEO | PRESENTATION
Transformer Testing Course – Lessons #19 Testing of auxiliaries
The 19th lesson of the Transformer testing course is hosted and authored by Mr. Balazs Sztari at Mater's level.
VIDEO | PRESENTATION
Transformer Testing Course – E-LESSON #1 – Introduction
This will be the 1st lessons in the series of transformer testing, and it might be extended with detailed and specific topics.
VIDEO | PRESENTATION
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.
VIDEO | PRESENTATION
Transformer Testing Course – E-LESSON #3 – Winding resistance measurement
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – E-LESSON #4 – Short-circuit impedance and load loss measurement
Learn about standards, test and evaluation methods, and requirements for test equipment of short-circuit impedance and load loss measurement of transformers.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #5: No-load loss and current measurement
In the fifth lesson of Transformer Testing Course, you will learn about the basics and techniques of these tests with the usual detailed explanations.
VIDEO | PRESENTATION
Transformer Testing course – e-lesson #6: Dielectric tests on power transformers
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #7: Lightning impulse test (part I)
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #8: Lightning impulse test (part II)
The 2nd part of lightning impulse testing lesson, with focus on waveshape control and evaluation of oscillatory and high overshoot LI waveforms.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #9 Switching Impulse Test
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer testing course – e-lesson #10: Applied voltage test
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #11: Line terminal AC withstand voltage test (LTAC)
This chapter of the Transformer Testing Course details the line terminal AC withstand voltage test of power transformers. You will learn about IEC and IEEE standard requirements, test connections, testing techniques, and failure cases.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #12: Induced voltage test and PD measurement
This chapter contains the most important information about induced voltage testing and partial discharge measurement on power transformers.
VIDEO | PRESENTATION
Transformer Testing course – e-lesson #13: Temperature rise test
This is the 13th e-lesson in the Transformer testing course
VIDEO | PRESENTATION
Transformer Testing Lesson -e-lesson # 14: Sound level measurement
This is the 14th e-lesson in the Transformer testing course.
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #15: Measurement of zero-sequence impedance
This is the 15th lesson in the Transformer Testing Course, hosted by Balazs Sztari. It deals with important parameter for three-phase electrical network design.
VIDEO | PRESENTATION
Transformer testing course – e-lesson #16: Insulation resistance measurement
This lesson provides an in-depth exploration of the mechanical testing procedures conducted during the Factory Acceptance Test (FAT) of power transformers. The focus is on...
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #17: Capacitance and dielectric dissipation factor measurement
In this lesson, you will learn about the AC insulation test method for the capacitance and loss factor. Lesson is hosted on Master's level.
VIDEO | PRESENTATION
Transformer Testing Course – e-lesson #18: Testing of tap-changers and built-in current transformers
The 18th lesson of the Transformer testing course is hosted and authored by Mr. Balazs Sztari at Mater's level.
VIDEO | PRESENTATION
Transformer Testing Course – Lessons #19 Testing of auxiliaries
The 19th lesson of the Transformer testing course is hosted and authored by Mr. Balazs Sztari at Mater's level.
VIDEO | PRESENTATIONAbout the author

Balazs Sztari
Balazs Sztari 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.
CG Electric Systems Hungary