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) 41 - 50 of 370 in total
DLRO2 safety warnings
Safety warnings for DLRO2
Published: 14 July 2020
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Partial discharge testing from Power Diagnostix
Power Diagnostix offers a wide range of partial discharge testing and monitoring systems for MV and HV applications.
Published: 6 July 2020
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Transformer Winding Resistance Measurement: Field Challenges
Megger’s article “Transformer Winding Resistance Measurement: Field Challenges” was presented at the 2020 NETA PowerTest Conference in Chicago, Il. This article takes an in-depth look at the lesser known facts associated with the DC winding resistance (WR) measurements, diving deeper into topics such as selection of the correct test current, and the importance of compliance voltage during the test. Phenomena as core saturation, current stabilization, the influence of winding inductance on readings, and the effect of temperature, are also explained.Article Brief:DC winding resistance measurements (WRM) performed on distribution and power transformers are used to diagnose internal issues such as shorted turns, burnt or open windings, poor connections, and problems with On-load tap changers (OLTC) and De-energized tap changers (DETC). Industry acceptance criteria recommends that winding resistance between phases should be within 2% of each other. Additionally, comparison may also be made with original factory measured data, where differences within 5% is considered satisfactory. Results should be temperature corrected when measuring against factory readings or historical measurements. If readings obtained are outside of industry standards, complementary tests are recommended to assess winding condition. Although performing a WRM is relatively straight forward, there exist several challenges that one can encounter while testing in the field. The following section discusses these field challenges and solutions to support winding resistance testing.
Published: 12 June 2020
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VLF Sine Wave 62 Firmware
VLF Sine Wave 62 Firmware
Published: 9 June 2020
VLF Sine Wave 45 Firmware
VLF Sine Wave 45 Firmware
Published: 9 June 2020
Software download files for SVERKER900
Published: 4 June 2020
Transformer Turns Ratio Test: Some Unknown Facts
Transformer Turns Ratio Testing: Lesser known facts that are affecting your ResultsOverviewTransformer Turns Ratio (TTR) Measurement is a diagnostic field test performed on a transformer to assess winding and core condition. The traditional method of performing this test has been limited to applying an AC voltage across each phase of the HV winding and measuring the AC voltage induced on the corresponding LV winding phase. The measured ratios are compared with calculated ratios from the nameplate voltages and as per international standards the calculated % error needs to be within ±0.5%. A number of factors such as core permeability, mutual and leakage flux, excitation losses, and winding configuration can influence the % error obtained. Through field testing it has been found that accurate results are obtained by energizing all the three phases simultaneously from the LV winding side and measuring the voltage induced on the HV winding.
Published: 28 April 2020
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One touch OLTC with the TTRU3
Completing turns ratio tests on all transformer taps can be a cumbersome process. With One Touch OLTC from the TTRU3, anyone can configure and test all taps within a few short minutes.
Published: 22 April 2020
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Remote Operation of the MPQ1000 via Ethernet
We recieve feedback from many of our customers who use power quality (PQ) meters - including utilities, industrial and service providers. They have told us that one of the most important features of a PQ meter is the ability to control the unit and and view data remotely. Having to retrieve a unit from the field in order to download and then analyze the recorded data creates added expenses in time and resources.
Published: 7 April 2020
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S1-1068 Performance at Power Grid Corporation of India in 765 kV charged substation
The Power Grid Corporation of India Limited (PGCIL) is an Indian state-owned company headquartered in Gurugram, North India and engaged mainly in Transmission of Power & transmits about 50% of the total power generated in India on its transmission network. The company owns and operates about 1,61,790 circuit kms of transmission lines at 800/765 kV, 400 kV, 220 kV & 132 kV EHVAC & +500 kV HVDC levels and 248 sub-stations. Also, it has the transformation capacity of about 3,96,825 MVA as on 30th November 2019.
Published: 2 April 2020
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  • Showing item(s) 41 - 50 of 370 in total