Megger
 |
|
| Private | |
| Industry | Electrical power |
| Founded | 1889 |
| Founder | Sydney Evershed and Ernest Vignoles |
| Headquarters | Dover (UK); Dallas, Texas; Valley Forge, Pennsylvania (United States), Danderyd (Sweden), Baunach (Germany) |
| Products | Electrical test and measurement equipment |
| Revenue | €250 m |
|
Number of employees
|
1350 |
| Website | www.Megger.com |
Megger Group Limited is a company that manufactures electronic test equipment and measuring instruments for electrical power applications.
The company is known for their original electrical insulation testers, and supply products related to the following areas: cable fault locating, earth/ground testing, low resistance measuring, power quality, electrical wiring, insulation testers, multimeters, portable appliance testers, clamp-on meters, current transformers, etc.
The company logo depicts the word Megger with red capital "M" and the remaining letters in black, all on white background.
Over the years there were several companies whose names were associated or assimilated into Megger.
Sydney Evershed (1858–1939) and Ernest Vignoles bought the instrument section of Goolden and Trotter (where they both worked) and founded Evershed & Vignoles Limited on 5 February 1895. However, it is likely that the origins of Megger can be traced back to 1889. The company was based at Acton Lane Works, Chiswick, London, England where it moved from Westbourne Park in 1903.
Sydney Evershed applied for several patents for various electric devices.
One of them was a "hand dynamo", which allowed generation of voltages high enough to measure resistance in the megohm range and thus construction of a first portable insulation tester. The MEGaohm metER was then named as Megger and the word became a trademark name registered on 25 May 1903. The invention became a popular method of insulation testing and by the 1920s it was "well-known" by other engineers.
Due to electromagnetic interference the first Megger insulation testers were built as two separate boxes – one for voltage generation and one for measurement. They were later integrated into a single device in a Bakelite case and special foldable handle for driving the dynamo. The most popular was the so-called "Wee Megger" (voltage up to 500 V and resistance up to 20 megohms), but there were larger devices like the "Major Megger", "Meg" or "Megger insulation tester", which could generate up to 2500 V and measure resistance up to 20,000 megohms. (Modern version of Megger - model MJ15 - can generate up to 5 kV.)
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Wikipedia