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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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2019 Electrical Test Equipment Catalog
2019 Distributor Catalog
Published: 25 February 2019
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BVM150/300/600 - BVM system/connections
BVM150The system consist of 16 BVM units. Power & Signal Connector. Power supply.16pcs. Ethernet cables 0,5m. Ethernet cable 2m. USB extension cable 2m. 16 pcs. Dolphin clips(15 pcs. Black, 1 pcs. red). Art no CJ-59092. 16 pcs. extension cable, Art no 04-30050.BVM300The system consist of 31 BVM units. Power & Signal Connector. Power supply. 31pcs. Ethernet cables 0,5m. Ethernet cable 2m. and 3m. USB extension cable 2m. 31 pcs. Dolphin clips (30 pcs. black, 1 pcs. red). Art no CJ-59093. 31 pcs. extension cable, Art no 04-30050.BVM600The system consist of 61 BVM units. 1pcs. Power & Signal Connector. Power supply. 61pcs. Ethernet cables 0,5m. Ethernet cable 2pcs. 2m and 2pcs. 3m. USB extension cable 2m. 61 pcs. Dolphin clips (60 pcs. black, 1 pcs. red). 2pcs. Art no CJ-59096. 61 pcs. extension cable, Art no 04-30050.BVM special 600VThe system consist of 46 BVM units. 2pcs. Power & Signal Connector. 2pcs. ungrounded power supply. 46 pcs. Ethernet cables 0,5m. 2pcs. USB extension cable. 2pcs. Opto coupler. Dolphin clips (44 pcs. black, 2 pcs. red). Art no CJ-59198. 46 pcs. extension cable, Art no 04-30050.
Published: 25 February 2019
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1-500Hz Narrow Band Dielectric Frequency Response
For approximately 25 years, dielectric frequency response (DFR) has been investigated and proven to provide an accurate method of determining both the moisture condition of paper + oil power transformers and bushings. Together with general insulation testing, DFR provides enhanced insulation condition of the transformer under test.
Published: 24 January 2019
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Diagnostic Test: 1-500 Hz Narrow Band Dielectric Frequency Response
For approximately 25 years, dielectric frequency response (DFR) has been investigated and proven to provide an accurate method of determining both the moisture condition of paper + oil power transformers and bushings. Together with general insulation testing, DFR provides enhanced insulation condition of the transformer under test.DFR testing method is now accepted internationally – as evidenced by its inclusion in the CIGRE TB445 as an accepted method for moisture determination. IEEE is presently in the process of completing a new guide for use of DFR in transformer moisture assessment for both factory and field testing, which should be completed and available by 2019. Instruments like the Megger IDAX300, which was the first commercially available unit to perform this test, is a valuable tool in this determination of moisture content.IDAX300 has included the ability to perform PF tests at frequencies from 1 to 500Hz which can be defined as a narrow frequency band dielectric frequency response test. We are now able to provide a shorter duration DFR test which gives us additional information into the overall insulation condition of the transformer or bushing.This paper illustrated a narrow band DFR test performed on a transformer located in Thailand – EGAT (power utility) and the result was recorded. It is proved that narrow band DFR test can provide a base line for any future testing comparison. We can use both a curve shape and/or a trend change for looking for issues. We no longer need to only rely on the line frequency PF(DF) to detect future issues.
Published: 8 January 2019
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Transformer Test Instrument Software Updates for TTR330A, MTO330A, MWA330A, DELTA4310A
Software update for 'A' models
Published: 20 December 2018
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PD_Software
PD Detector Software for MV DAC30, TDS NT, TDM 45, PDS 62
Published: 11 December 2018
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MPQ1000 Common Connections
An application note locoking at the common connections of the MPQ1000.
Published: 7 December 2018
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Fast Transient
Very fast transients have limited energy due to their short duration. They are caused by arcing faults, such as bad brushes in motors, and are rapidly damped out by even a few meters of distribution wiring.
Published: 7 December 2018
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Enabling Additional Channels
When creating a setup file a particular power wiring connection needs to be selected. This instructs the instrument on how to calculate the power and energy. When the power wiring connection is create the required input channels are automatically enabled.In some cases the operator may wish to enable additional channels for other measurements. This will not affect the power or energy measurements.
Published: 6 December 2018
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Seven Tips for Insulation Resistance Testing
Seven tips for insulation resistance testingPaul Swinerd - Product portfolio manager - Power Insulation testing at voltages above 1 kV can be a quick and convenient way of gathering a lot of useful information about the condition of electrical equipment. To stay safe and to get the best results, however, it is important that the testing is carried out correctly. These tips should help, but remember that it’s always essential to follow the manufacturer’s instructions for the test set that’s being used, to abide by the relevant standards and to follow good working practices. 1. Use the right test leads.Manufacturers of insulation resistance testers go to a lot of trouble to produce test lead sets that will help make their instruments safe and convenient to use. Always use a lead set that’s designed for the instrument, appropriate for the test voltage you’re planning to use and suitable for the test object you’re working on. If the connections can’t be made securely, the test lead may become accidentally disconnected, leaving the test object charged to a dangerously high voltage. Never ever use test leads that show any sign of damage and never attempt to repair damaged or worn leads – replacing them is the only safe option. 2. Choose the best test voltage. Test sets are now available that will allow testing to be carried out at voltages up to 15 kV. Testing at higher voltages can yield additional and more useful information about the condition of the test object’s insulation, but using a voltage that’s too high for a particular test object to withstand can seriously damage it.  Always refer to the supplier’s data for the object under test and follow the guidance it contains on testing. If this isn’t possible, seek help from the manufacturer of your insulation tester. 3. Choose the right test. A quick one-off insulation resistance measurement can sometimes provide useful data, but modern insulation resistance test sets have much more to offer. Typically, they offer facilities for polarisation index (PI), dielectric absorption ratio (DAR), dielectric displacement (DD), step voltage (SV) and ramp tests. Full information on these tests and how to carry them out should be in your instrument’s handbook – if it isn’t consult the manufacturer. Some of these more advanced tests take a little longer to perform but, with many kinds of test object, they can provide much more reliable information about insulation condition. 4. Use an instrument with a high measuring range.If your instrument shows all results above, say, 1 TΩ as infinity, you’ve got no way of knowing that the insulation resistance of your test object has fallen from 30 TΩ to 2 TΩ since the last time you tested it. This latest result might still fall within the range that’s considered acceptable for the test object, but a big fall in resistance value like this is often a valuable early warning that a problem is developing. An instrument with a high measuring range will alert you to this situation. 5. Complete the test before disconnecting the test set. Test objects can hold a lot of charge and, particularly when they’re being tested at high voltages, the stored charge can be lethal. Modern testers guard against this problem by safely discharging the test object when the test has run to completion or when it is terminated by the user. If the test leads are disconnected prematurely, however, the discharge function can’t operate, and the test object will remain charged – and dangerous. 6. Use the guard terminal.Surface leakage over test objects like bushings can greatly reduce their apparent insulation resistance and, as a result, there have been many cases of insulators being scrapped when all that was really necessary was to clean them. Using the test set’s guard terminal – which is usually connected to a bare wire wrapped around the surface of the object under test – eliminates or at least greatly reduces the effect of surface leakage on the test results. And don’t forget that making two measurements, one with the guard terminal connected and one without, can provide a very good indication of whether or not the insulator needs cleaning. 7. Record and trend your results.A single insulation resistance measurement can give you a quick indication of insulation condition, but a series of measurements over a period of time, with the results recorded and trended, will tell you a lot more. If the insulation resistance of your test object is declining over time, for example, it’s probably a good idea to find out why, well before it declines to the point of failure. Accurate records will also quickly show up any sudden deviation from the usual insulation resistance values, which is always a strong indication that further investigation is necessary. For additional information that will help you to get the best from the time and money you invest in high-voltage insulation testing, download the free application guide to insulation testing above 1 kV.  
Published: 3 October 2018
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  • Showing item(s) 1 - 10 of 262 in total