Technical library

Technical library

The Megger technical library provides access to a range of additional content and resources such as technical guides, application notes and more. Use the filters to browse specific content (e.g. application notes) or refine your search to a particular electrical application area. 


If you would like to see the content we have available on a particular subject or need to locate some software, simply enter a search below. Please note, you will need to create an account to access some resources.

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    Showing item(s) 1 - 10 of 11 in total
A Guide to Transformer Ratio Measurements
Transformers are subject to mechanical impact and vibration. Problems or faults occur due to poor design, assembly, handling, poor environments, overloading or poor maintenance. Measuring the polarity and turn ratio of a transformer winding assures that the connections are correct and there are no severe mismatches or opens. Many transformers have taps built into them. These taps allow the ratio to be increased or decreased by fractions of a percent. If any of the ratio changes involve a mechanical movement of a contact from one position to another, these tap changes should also be checked during a ratio test.
Published: 24 January 2019
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A guide to power quality testing
A comprehensive guide to testing power quality.
Published: 7 March 2018
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A Stitch in time
A complete guide to electrical insulation testing
Published: 19 June 2017
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Pocket guide to PAT testing
this pocket guide we have endeavoured to cover the details of the 4th Edition - rather than clarify the changes – in an easy-to-read manner.
Published: 9 March 2017
The Megger guide to insulating oil dielectric breakdown testing
Gain insight into the different types of oil testing methods, including oil dielectric breakdown testing moisture content testing. This guide covers best practices for oil testing, the correct equipment to use, and the different IEEE/IEC standards to adhere to when testing.
Published: 21 February 2017
Guide to insulation testing above 1kV
This guide discusses the causes of insulation degradation on >1kV power cables, and the process of measuring degradation before a fault can develop. The guide also recommends the best equipment to use with reference to IEEE standards.
Published: 21 February 2017
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Circuit breaker testing guide
This guide covers the role and function of circuit breakers in a power network, as well as the main types of breaker and prevailing CB technologies. Learn more about failure modes, maintenance strategies and testing methods.
Published: 21 February 2017
Getting Down To Earth - A practical guide to earth resistance testing
Earth testing and resistivity measuring requires sensitive equipment and sophisticated calculations. This guide makes these processes easier to understand for both large and small ground systems, with detailed studies of various relevant testing methods.
Published: 21 February 2017
Guide to clamp-on ground testing
This booklet focuses on the clamp-on method of ground testing and is designed to give the reader a better understanding of the test method and where it can and cannot be used.
Published: 21 February 2017
Battery testing guide
Learn more about different kinds of batteries and the maintenance philosophies behind them. This guide also contains practical battery testing methods and test equipment recommendations.
Published: 21 February 2017
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  • Showing item(s) 1 - 10 of 11 in total