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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 221 in total
The Importance and Benefits of Portable Testing
A Portable Appliance Tester (PAT) is an instrument that is dedicated solely to the safety testing of portable electrical equipment in accordance with recognized national and local standards. Depending on locale, these standards may have been enacted into law. They may be requirements of specific industries or trade organizations, or just a good idea. In many cases, manufacturers of electrical consumer products who wish to export to foreign markets will be required, sometimes by national law, to assure the products have been safety tested. If testing is performed at time of manufacture, it will save money, aggravation and ill will that could result from having the products fail in the destination country. 
Published: 27 March 2018
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Testing appliances with long power cords
When testing appliances with long power cords, usually longer than 5m, it can be necessary to allow for the additional cord resistance. Most modern Portable Appliance Testers have pre programmed pass limits. These are based on the limits specified in the Code of Practise for In-Service Inspection and Testing of Electrical Equipment. However, the true pass limit depends on the appliance to be tested. The pre-programmed limit may not be suitable for all appliances. Moving the goal posts can be justified in particular circumstances when a test initially fails.
Published: 8 March 2018
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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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Continuity and Low Resistance Testing
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Times; color: #e12000} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times; color: #797979} span.s1 {font: 12.0px Times; color: #797979} No electrical test is simpler...and few more commonly employed…than the continuity test. This simple test is a ubiquitous option on multimeters (DMMs) and insulation testers. It is simple to perform; connect two leads across opposite ends of the test item (IUT), press the test button, and within seconds you have the resistance reading. Low is good, high is bad. It’s so simple and easy that it is readily applied to testing situations that require a more rigorous performance from the test instrument. This article will examine the parameters that determine the separation between the types of instrumentation.
Published: 6 March 2018
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Pre-locating faults with alternative method to arc reflection
While the share of installed cables without a jacket generally continues to decrease, the unjacketed cables that remain continue to age. As they do so, it is increasingly likely that a fault will develop on these cables. It can be particularly troublesome to locate faults on unjacketed cables as normal Time Domain Reflectometry, or radar, based fault location techniques often do not work, due to the corrosion of the neutral wires. While there is no guaranteed action that would result in locating the fault, this paper will outline some advanced methods, based on field experience, that can help when locating these types of faults. This paper was an article presented at NETA in 2017 and will discuss the Impulse Current method, which does not rely on the neutral wires being intact, in both a theoretical and practical light. 
Published: 14 February 2018
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CABA Win
PC software for Circuit breaker analysis 
Published: 8 February 2018
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Renaming test files on the MPQ units
An application note explaining how to rename test files on the MPQ test units. This feature can be used to keep track of recordings if the user has to record on multiple locations before downloading the data to a computer.
Published: 5 January 2018
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Transferring data from the MPQ to the PC
Data can be transferred from the MPQ to your PC in 3 ways – direct download, via SD card, and via USB stick. All 3 methods are discussed in this article.
Published: 5 January 2018
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Measuring current on a CT secondary circuit
In some cases, measuring actual current on the primary conductor is not possible and the user may have to measure current on the secondary circuit of a CT. In this case, the MPQ can be programmed to display the actual primary current values instead of the current measured on the CT secondary circuit. This is done by following the steps given below.
Published: 5 January 2018
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Measuring operational low voltage networks
Low voltage cable faults are often unstable, so they can only be located when the cable is conducting live voltage. Testing under these conditions is extremely hazardous, so separations filters, as well as constructional safety methods, should be employed at all times.
Published: 18 December 2017
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  • Showing item(s) 1 - 10 of 221 in total