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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 230 in total
Directional earth-fault protection - SVERKER 900
The fault current is set to 80mA tosimulatethe high current generated at the intermittent earth fault. The zero voltage is set to 20V;theconfiguration ismade in13 states.The fault states and the first two memory states are set to 20ms. The memory states havetimesselected togetthetrip as close to set time 1,2s as possible. In generator configuration,set U4gen to aux voltage DC.Set “Advanced mode” in SVERKER configuration.
Published: 28 April 2022
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OTS Vessel Prep Guides
When unexpected results are experienced in testing the dielectric breakdown of oil samples the cause can often be traced to insufficient attention to one or more of the following key elements of vessel preparation.
Published: 25 January 2022
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Download Virtual relay testing article
Virtual reality has been around for more than two decades. What started as a feature of computer games has become the norm in many industries, delivering benefits that include reduced costs, increased reliability, and better efficiency. In the power industry, early adopters of virtual reality are not only enjoying these benefits; they are also finding that it helps them continue carrying out a whole range of tasks despite the travel bans and social distancing imposed by the ongoing pandemic. This article describes how tests of relay protection are performed virtually with the SMRT digital twin and what benefits it gives.
Published: 17 December 2021
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Auxiliary voltage tests of circuit breakers
Measurement of the outer limits of the operating mechanism is required by international standards such IEEE C37 and as IEC 62271, when certifying a circuit breaker (CB). Some of those tests are valuable to repeat in field tests, obviously to ensure that the CB fulfil its design specification, but those tests and some additional tests in similar spirit can also disclose potential future problems. The most common is to vary the auxiliary voltage but it could also be other energy resources for example hydraulic and pneumatic pressure. This application note will focus of the auxiliary voltage, what the standard requires, sort out the terminology and what tests that are valuable to repeat in field tests.
Published: 29 November 2021
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Insulation resistance testing of surge/lightning arresters
Electric power transmission and distribution systems are vital for modern life. And, since the electricity these systems provide is essential, then these systems are essential too. One of the less celebrated components of these systems is the humble surge arrester. These arresters serve the important job of keeping the electric supply smooth and steady. As such, these devices must be tested regularly as part of a maintenance program.This application note looks at what a surge arrestor is, the test procedures of insulation resistance testers, as well as present test results and recommendations.
Published: 5 November 2021
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Testing Reclosers with ODEN or INGVAR
This application note informs about testing of reclosers with ODEN/INGVAR (herafter only ODEN is mentioned, though the text is valid for both products).
Published: 12 October 2021
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Testing LV breakers with High Current Probe HCP2000
This application note is about primary injection testing low voltage (LV) circuit breakers (CB) using the High Current Probe HCP2000 probe (AA-90165). Current source can be the primary test equipment ODEN or INGVAR
Published: 12 October 2021
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Testing Low voltage breakers with ODEN or INGVAR
This application note is about primary injection testing of low voltage (LV) circuit breakers (CB) with the primary test equipment ODEN or INGVAR (hereafter only ODEN is mentioned, though the text is valid for both products), and the challenges that could arise for various CB installations.
Published: 12 October 2021
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Testing Ground grid with ODEN
The ground grid is intended to carry current into the earth to both protect equipment and assure personnel in the vicinity aren’t exposed to electric shock, as would result from excessive step or touch potentials.
Published: 12 October 2021
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Testing Current Transformer with ODEN or INGVAR
This application note is about primary injection testing of low voltage (LV) circuit breakers (CB) with the primary test equipment ODEN or INGVAR (hereafter only ODEN is mentioned, though the text is valid for both products), and the challenges that could arise for various CB installations.
Published: 12 October 2021
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  • Showing item(s) 1 - 10 of 230 in total