356:
separate instruments required for the maintenance of the telecommunication circuits. This story may be based on a paper "The
History of the Avometer" by PR P Hawes. However the accuracy of the story may be questioned because it is unlikely that a senior Post Office Engineering manager would have been carrying around his own instruments. Macadie invented a first instrument, which could measure Amps, Volts and Ohms, so the multifunctional meter was then named as AVO. The Automatic Coil Winder and Electrical Equipment Company (ACWEECO,)was formed in 1922, principally by R H Rawlings, to exploit both the Avometer patent and that for an automatic coil winder also designed by MacAdie (GB199417). The first AVO was put on sale in 1923, and although it was initially a
669:
1214:
344:
99:
211:
1206:
1198:
1001:
388:
281:
31:
1071:
273:
313:. 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. The modern version of Megger – model MJ15 – can generate up to 5 kV.
578:
612:
SKF acquired Baker for $ 14m in 2007. At that time, the
Colorado-based business employed 62 people and had annual sales of around $ 11m. SKF said that the move into motor diagnostics was important to its energy efficiency business, and was in line with its move to support its customers sustainability
296:
Sydney
Evershed applied for several patents for various electric devices. One of them was for a "hand dynamo", which allowed the generation of voltages high enough to measure resistance in the megohm range and facilitated the construction of the first portable insulation tester. The Megaohm Meter was
378:
The company also designed and made other electronic instruments such as signal generators, valve (vacuum tube) testers and valve characteristic meters and specialist equipment for radio servicing. Many of these were intended for both military and commercial use and were made to a very high standard.
370:
With the intention of promoting export sales, Avo produced several other types of multimeter (Models 10, 14, 15, 16 and 20/21), which might be considered more modern in design than their traditional types but considered the
British market more conservative and, initially at least, these instruments
288:
Sydney
Evershed (1858–1939) and Ernest Vignoles (1865–1948) bought the instrument section of Golden 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
608:
The business was acquired by Megger from the SKF Group on 19 August 2018. The UK test equipment manufacturer Megger Group has entered into agreement with SKF to purchase its Baker
Instrument business which makes equipment for testing and diagnosing electric motors and other rotating machines. The
355:
is attributed to Donald
Macadie (1871–1955) who was the manager of the Post Office Telephone Factory in Holloway, North London. He was granted Patent GB 200977 on 26 July 1923. It has often been stated that Mr. MacAdie devised the Avometer because he became dissatisfied with having to carry many
374:
Avometer model numbers were first used by the company from 1936 (Avometer Model 7) and were used to distinguish designs with different ranges and functionality. Several "Models" were in production contemporaneously. Some designs were produced especially for specific industries (e.g. Model 12 for
366:
Instruments derived from the original AVO multimeter were manufactured continuously from 1923 until the final model (AVO Model 8 Mk 7) was made in
October 2008. Its production was terminated only due to increasing problems with obtaining some mechanical parts for the movement. The AVO Model 8, a
620:
Megger's CEO Jim
Fairbairn, says: “We are excited to acquire a recognized industry leader with equipment and online testing capability that will complement Megger’s product range. We look forward to working with the Baker team to drive continued growth and innovation.”
588:
SebaKMT has main development and manufacturing sites in
Germany and the USA. This acquisition meant substantial increase of Megger's turnover. As a result, the Group's position on the market of test equipment for the electrical power sector increased significantly.
413:
The Institute has a Technical Resource Center – an online store offering books, standards, training materials, Personal Protective Equipment, and tools. The actual training can be organised in different sites around the world, for example at the Megger facility in
616:
In 2018, SKF sold the Baker factory to the world leader Megger. This was a leverage to the Baker factory who are still the leaders on the market. There are many companies trying to copy their software for Surge test diagnostic, but they failed their tests.
493:
In 1991 Biddle, Megger and MultiAmp joined together to form AVO International. The use of the Biddle trademark was retained for many of products still available today. Biddle was one of the first companies to provide commercial cable fault locators.
641:
Most of the names and trademarks of the acquired companies are now owned by Megger Group Ltd. Apart from "Megger" itself, the best known ones are: AVO, Biddle, Biddle AVO, Biddle Megger, States, PowerDB, and recently Programma and Pax Diagnostics.
367:
20,000 ohm per volt universal instrument, was introduced in 1951 and versions of this model were extensively used, especially in British industry, education and research, for 57 years without major modifications to the functions it provided.
403:. AVO Training Institute was established for providing training in electrical engineering, particularly regarding safety, maintenance and testing of electrical equipment, also by using instruments from competitive manufacturers.
1161:
The Group has over 1000 distribution points in 132 countries. 85% of sales are made via the distribution network. There are sales centres in several countries and products are also sold via specialised distributors including
304:
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
664:
It is difficult to assess the actual number of patents, because some of them were obtained before acquired companies joined Megger Group. The original Megger insulation tester patent is over 100 years old.
1779:
1768:
1646:
957:
In 2011 Megger's MFT1700 Multifunction Tester won the "Innovative Test & Measurement Product of the Year", at the Electrical Industry Awards. Three other products were also nominated: hand-held micro-
1537:
1376:
335:
The company (established in 1922) was producing precision laboratory equipment (e.g. resistors, inductors, shunts, galvanometers, etc.). H.W. Sullivan Ltd was incorporated into Megger in 2002.
676:
The table shows a timeline of some typical devices introduced by Megger Group companies (not necessarily covered with patents). In recent years the company has also paid more attention to the
460:
In 1991, the company changed its name to AVO Megger Instruments Limited. In 2000 the company became known as AVO International Holdings Limited and in 2002 as AVO International Limited.
2230:
530:
electrical test and measurement equipment manufacturer founded in 1976. It provided products including: circuit breaker analysers, battery load testers, primary injection testers,
457:
Megger Instruments Limited was based at AVO's Dover site, in Archcliffe Road, Dover, CT17 9EN, Kent, England, which is also the present location of the UK branch of the company.
2225:
2220:
1691:
371:
were not offered on the home market. The Model EA113 was an excellent electronic multimeter, sold in the UK and abroad, in the same style as the Model 14 to 21 range.
1959:
1008:
Megger Group has manufacturing sites and sales centres in several countries worldwide. The main production sites are in: Dover, Dallas, Valley Forge and Danderyd.
221:(also known as Megger) is a British manufacturing company that manufactures electronic test equipment and measuring instruments for electrical power applications.
2016:
Patent 7271577: Testing loop impedance in an RCCB electrical test circuit by Smithson, Edward, Xu, Rongkai, Mandala, Agung Kurniawan Sadya, Chin, Freddie Yun Heng
1055:
machines. However, many of the mechanical parts are purchased from other suppliers. (This was one of the factors why production of AVO Model 8 was discontinued.)
1041:
684:
1589:
1511:
518:
PowerDB was acquired in autumn 2005. They provide "acceptance and maintenance test data management software" which is compatible with many Megger products.
2180:
569:
testing and insulation diagnostics equipment. Pax Diagnostics was founded in 2004 by former employees of Programma Electric, and it is also based in Täby.
1861:
2105:
1971:
478:, was the United States importer of Megger products, as well as a manufacturer of equipment under their own name. In 1989, using concepts introduced by
301:
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.
1753:
2090:
2072:
2054:
2036:
1809:
466:
The Dover site employs around 230 people. In total (including the sales channels) Megger Group Limited employs around 1500 people worldwide.
2155:
410:
and so far over 230,000 electrical maintenance and testing technicians and engineers from around the world have attended training courses.
395:
In 1963 Multi-Amp and AVO created Multi-Amp Institute. In 2004 the Institute became AVO Training Institute, Inc. with the headquarters in
41:
2018:
1933:
2000:
1657:
60:
78:
2235:
1725:
1688:
1167:
1548:
585:
In July 2012 Megger acquired SebaKMT specialising in power cable fault location and testing, and pipe leakage detection.
1793:
1709:
1388:
1339:
539:
479:
434:
553:
and joined Megger Group Ltd. in June 2007 as Megger Sweden AB. The company was relocated in April 2013 from Täby to
421:
The AVO Electrical Engineering Division was created in 2002 and it specialises in power system studies, specifically
56:
1508:
1335:. This was also preceded with 15% reduction on all their equipment sold in China immediately after the earthquake.
1328:
962:
1835:
1559:
1288:
984:
977:
860:
688:
2191:
1865:
1052:
838:
531:
1948:
1482:
2240:
1332:
904:
683:
668:
510:. They manufacture terminal blocks and test switches under the trademark States (existing since the 1940s).
249:
593:
1364:
1125:
225:
1750:
1307:
The equipment is roughly divided into three groups: Power, Building and Wiring, and Telecommunications.
1085:
635:
554:
487:
237:
161:
656:
titled "Electrical tester" aimed at electrical engineers who might use products from the Megger range.
645:
However, some of the names of the products are also protected: Megger, AVO, DLRO, MFT, MIT, MPRT, etc.
1897:
375:
Auto-electrical work) and at the request of large companies, the British armed forces and later NATO.
973:
966:
597:
233:
1048:
2087:
2069:
2051:
2033:
1813:
535:
360:-only instrument many of its features remained almost unaltered right through to the last Model 8.
290:
253:
1446:
387:
316:
In the 1920s, the company employed approximately 500 people. That number rose to 1,000 during the
2159:
1668:
1316:
1011:
Certificates of Conformity are supplied with most instruments. Depending on product and site the
1213:
363:
ACWEECO later became known as AVO Limited and manufactured instruments with the AVO trademark.
343:
849:
776:
734:
634:
The first trademark of the company, the name Megger was registered in 1903 and it remains the
444:
In 1987 the name of the company was for the first time changed to Megger Instruments Limited.
324:
210:
2116:
2015:
1930:
52:
1997:
1497:
753:
317:
229:
98:
2094:
2076:
2058:
2040:
2022:
2004:
1937:
1797:
1757:
1713:
1695:
1515:
1486:
1205:
1197:
1150:
109:
2145:
E. Langan et al., A guide to low resistance testing, Megger, MEG-429_V-04/MIL/2.5M/7.2005
1000:
803:
565:
In October 2008 Megger Group Ltd. acquired Pax Diagnostics in Sweden. Pax manufactures
437:
founded in 1936. The company was taken over by Thorn EMI in 1967 (linked with company
433:
In 1970, along with other members of the George Kent Group the company was acquired by
357:
2117:
Test Equipment Connection Corporation announces new distribution agreement with Megger
1908:
2214:
1526:
1163:
264:
Over the years there were several companies whose names were associated with Megger.
241:
149:
1173:
There are total of 15 sales and technical support offices in the US, Canada, Dover,
490:
systems, which led to the BITE (Battery Impedance Test Equipment) line of products.
486:, Biddle started development of a range of equipment to test the integrity of large
1780:
http://archives.theiet.org / Automatic Coil Winder and Electrical Equipment Company
1145:
1130:
475:
463:
Finally it changed its name to Megger Group Limited in 2002, as it is known today.
157:
153:
1919:
1729:
927:
916:
566:
17:
280:
1468:
1457:
1340:
Mesalands Community College's North American Wind Research and Training Center
677:
352:
245:
1435:
1424:
1413:
1985:
1790:
1603:
1135:
1063:
1036:
1031:
1012:
965:
PAT400 (Innovative Test & Measurement Product of the Year), and digital
653:
649:
550:
422:
298:
1706:
1392:
1070:
1839:
1361:
Interview with Matz Ohlen, Director of Transformer Test Business at Megger
577:
1570:
Register of Births, Parish of Halkirk, Caithness, (Scotland) Entry No. 46
1327:
Megger donated 5% of its Chinese sales revenue (for three months) to the
1273:
1059:
958:
407:
306:
969:
DET14C / DET24C (Innovative Commercial/Industrial Product of the Year).
272:
2070:
Awards night resounding success as Electrical Industry celebrates, 2007
1886:
1186:
1105:
1100:
1095:
543:
483:
165:
972:
Megger also won in earlier editions, for instance in 2007 these were:
1182:
1178:
1140:
1120:
1115:
1090:
527:
503:
396:
310:
946:
Automatic 12kV insulation power/dissipation factor test set (DELTA)
1626:
1479:
961:
MOM2 (category Innovative Power Product of the Year), professional
16:"Megger" redirects here. For the insulation resistance tester, see
1212:
1204:
1196:
1174:
1110:
1080:
999:
765:
682:
667:
576:
507:
415:
400:
386:
342:
279:
271:
209:
145:
1338:
Over $ 9,000 of electrical testing equipment has been donated to
1689:
www.occupationalhealthdirectory.com / AVO Training Institute Inc
1637:
D. MacAdie correspondence file Imperial College Archives, London
1315:
In the UK, Megger regularly sponsors first year projects at the
1669:
www.electricalportal.co.uk / AVO Model 8 retires after 58 years
438:
228:
testers. It supplies products related to the following areas:
24:
1303:
Professional hands-on technical and safety training programs
323:
In 1965, Evershed & Vignoles Ltd. became a part of the
1616:
Bulletin of the Scientific Instrument Society No.37 (1993)
2128:
1658:
www.electronicsweekly.com / Megger bids farewell to AVO 8
2205:
1972:"UK's Megger buys Baker motor-testing business from SKF"
1769:
http://archives.theiet.org / Thorn Electrical Industries
1221:
Megger produces over 1000 products in around 25 groups:
202:
1377:
http://archives.theiet.org, Evershed & Vignoles Ltd
48:
2034:
The Electrical Industry Awards announces Winners, 2011
2088:
Electrical Industry Awards announces winners for 2012
1319:, as well as collaborating with other universities.
2052:
Electrical Industry Awards announces finalists, 2011
59:, and by adding encyclopedic content written from a
1469:
Megger is "well-known" by 1927, US Patent 1,616,387
1076:
Main production and sales sites of Megger Group Ltd
441:), which at the same time also bought AVO Limited.
309:case, with special foldable handle for driving the
284:
Modern version of Megger insulation tester MIT520/2
198:
188:
180:
172:
141:
131:
123:
115:
105:
1726:"www.megger.com / AVO Training Institute in Paris"
1538:http://archives.theiet.org / Evershed_and_Vignoles
822:Automatic 10kV insulation power factor test set
1604:"Greater London Industrial Archaeology Society"
830:Microprocessor-based protective relay test set
542:. The production plant facility was located in
474:For many years, the James G. Biddle Company in
293:, where it moved from Westbourne Park in 1903.
1898:www.gepower.com / GE Sells Programma to Megger
1062:and Dover and Danderyd sites are certified to
983:In 2012 Megger won an award for its TDR1000/3
2231:Manufacturing companies of the United Kingdom
1931:www.paxdiagnostics.com Pax joins Megger Group
1527:www.gracesguide.co.uk / Evershed_and_Vignoles
1285:Tachometers and speed measurement instruments
879:High power Relay test set with user features
297:then named the Megger, and the word became a
8:
1560:H.W. Sullivan Limited in the Companies House
1458:US Patent 1,358,179 mentioning Megger (1920)
887:Multi-function tester with ergonomic design
871:Micro-weight Low Resistance Ohmmeter (DLRO)
91:
2226:Electronics companies of the United Kingdom
1984:Nick Hilditch (Editor), Electrical Tester,
1949:Electrical Digest / Megger acquires SebaKMT
725:Multimeter with Amps, Volts and Ohms (AVO)
609:terms of the deal have not been disclosed.
1960:Utility Products / Megger acquires SebaKMT
97:
90:
1480:Vintage Communication Pages, Major Megger
795:Digital line earth loop impedance tester
672:Centenary certificate of Megger trademark
406:In 1996 the Institute was certified with
244:, electrical wiring, insulation testers,
176:Electrical test and measurement equipment
79:Learn how and when to remove this message
1998:Product design company chosen for Megger
814:Battery impedance test equipment (BITE)
694:
2221:Electronic test equipment manufacturers
1356:
1354:
1350:
1300:States terminal block and test switches
502:Megger Group Ltd. owns the US site in
320:, reaching its peak of 1,870 in 1967.
40:contains content that is written like
1168:Test Equipment Connection Corporation
592:SebaKMT developed and introduced the
7:
895:Noise immune 10kV insulation tester
709:Portable insulation tester (Megger)
549:In March 2001 Programma was sold to
2181:Megger Responds to Chinese Disaster
1751:AVO Electrical Engineering Division
1267:Portable appliance and tool testers
598:testing electrical faults in cables
2192:Megger donates equipment to NAWRTC
1579:Wireless World, April 1955, P. 156
938:Cable fault location system (PFL)
391:Logotype of AVO Training Institute
14:
1201:Megger product range (Dover site)
540:protective relay test instruments
214:Megger site in Dover, England, UK
2156:"Kent student wins Megger prize"
2106:Megger products in RS Components
1988:published by Megger, Spring 2008
1836:"www.statesproducts.com / about"
1647:http://archives.theiet.org / AVO
1549:www.porthcurno.org.uk / Sullivan
1264:Partial discharge test equipment
1255:Motor and phase rotation testers
1069:
1022:Nuclear 10CFR Appendix B PART 21
907:electrical test circuit tester
852:-based Testing Software Program
841:-driven watthour meter test set
29:
1436:US Patent 639,849 (26 Dec 1899)
1294:Transmission impairment testers
1243:Insulation power factor testers
1810:"www.biddlemegger.com / about"
1425:US Patent 642,743 (6 Feb 1900)
1414:US Patent 611,809 (4 Oct 1898)
1228:Cable fault locating equipment
863:with TX Null technology (TDR)
717:Low resistance Ohmmeter (LRO)
680:and design of their products.
1:
1246:Insulation resistance testers
1058:All manufacturing sites have
806:-based high current test set
1791:www.east-kent.co.uk / Megger
1042:National Physical Laboratory
919:turns ratio test sets (TTR)
787:Portable digital multimeter
526:Programma Electric AB was a
276:Wee Megger insulation tester
1707:www.avotraining.com / about
1627:www.gracesguide.co.uk / AVO
1157:Sales and technical support
480:Commonwealth Edison Company
435:Thorn Electrical Industries
351:The invention of the first
2257:
1590:"Espacenet - results view"
1234:Data communication testers
1004:SMD machines at Dover site
779:(Corona) detection system
532:vacuum interrupter testers
250:portable appliance testers
15:
1289:Time domain reflectometry
1270:Power quality instruments
1240:Ground resistance testers
1217:Megger insulation testers
1068:
985:time-domain reflectometer
963:portable appliance tester
861:Time-domain reflectometer
689:time-domain reflectometer
652:but distributed for free
96:
2093:6 September 2013 at the
2003:10 February 2009 at the
1920:Megger Sweden is moving!
1909:www.programma.se / about
1887:www.programma.se / about
1796:10 February 2009 at the
1694:20 November 2008 at the
1485:10 February 2009 at the
1389:"www.megger.com / about"
1252:Low resistance ohmmeters
224:Megger is known for its
2236:Companies based in Kent
2057:29 October 2011 at the
2021:13 October 2012 at the
1756:1 November 2009 at the
1514:9 February 2009 at the
1498:Megger advert from 1943
1367:, Vol. 2, Issue 3, 2015
1333:2008 Sichuan earthquake
1231:Circuit breaker testers
1209:Megger "power" products
1047:Dover site has its own
268:Evershed & Vignoles
1712:5 January 2009 at the
1679:AVO press release 1967
1297:Watt-hour meter tester
1249:Line testing equipment
1225:Battery test equipment
1218:
1210:
1202:
1005:
976:MFT 1553 and portable
692:
673:
648:The Group publishes a
582:
392:
383:AVO Training Institute
348:
285:
277:
215:
2075:26 April 2012 at the
2039:26 April 2012 at the
1216:
1208:
1200:
1015:can be traceable to:
1003:
903:Loop impedance in an
686:
671:
636:intellectual property
625:Intellectual property
594:arc-reflection method
580:
429:Thorn Electronics/EMI
390:
346:
283:
275:
226:electrical insulation
213:
61:neutral point of view
1936:15 July 2011 at the
1365:Transformer Magazine
978:cable fault location
974:multifunction tester
347:AVOmeter model 8 Mk7
254:current transformers
219:Megger Group Limited
92:Megger Group Limited
1868:on 10 February 2009
1395:on 5 September 2009
1237:Fiber optic testers
745:Resistive load box
638:of the Megger Ltd.
581:Logotype of SebaKMT
291:Acton Green, London
252:, clamp-on meters,
190:Number of employees
93:
53:promotional content
2162:on 9 February 2009
1842:on 5 February 2009
1732:on 9 February 2009
1317:University of Kent
1282:T1 network testers
1219:
1211:
1203:
1166:and more recently
1006:
693:
674:
654:quarterly magazine
583:
393:
349:
289:Acton Lane Works,
286:
278:
216:
55:and inappropriate
2206:Megger Group Ltd.
1974:. 23 August 2018.
1816:on 1 January 2009
1193:Types of products
950:
949:
777:Partial discharge
425:hazard analysis.
331:H.W. Sullivan Ltd
325:George Kent Group
208:
207:
160:(United States),
89:
88:
81:
2248:
2194:
2189:
2183:
2178:
2172:
2171:
2169:
2167:
2158:. Archived from
2152:
2146:
2143:
2137:
2136:
2125:
2119:
2114:
2108:
2103:
2097:
2085:
2079:
2067:
2061:
2049:
2043:
2031:
2025:
2013:
2007:
1995:
1989:
1982:
1976:
1975:
1968:
1962:
1957:
1951:
1946:
1940:
1928:
1922:
1917:
1911:
1906:
1900:
1895:
1889:
1884:
1878:
1877:
1875:
1873:
1864:. Archived from
1858:
1852:
1851:
1849:
1847:
1838:. Archived from
1832:
1826:
1825:
1823:
1821:
1812:. Archived from
1806:
1800:
1788:
1782:
1777:
1771:
1766:
1760:
1748:
1742:
1741:
1739:
1737:
1728:. Archived from
1722:
1716:
1704:
1698:
1686:
1680:
1677:
1671:
1666:
1660:
1655:
1649:
1644:
1638:
1635:
1629:
1625:name="Grace_AVO"
1623:
1617:
1614:
1608:
1607:
1600:
1594:
1593:
1586:
1580:
1577:
1571:
1568:
1562:
1557:
1551:
1546:
1540:
1535:
1529:
1524:
1518:
1506:
1500:
1495:
1489:
1477:
1471:
1466:
1460:
1455:
1449:
1447:Megger trademark
1444:
1438:
1433:
1427:
1422:
1416:
1411:
1405:
1404:
1402:
1400:
1391:. Archived from
1385:
1379:
1374:
1368:
1358:
1073:
1019:ANSI/NCSL Z540-1
695:
604:Baker Instrument
318:Second World War
232:fault locating,
135:Sydney Evershed
119:Electrical power
101:
94:
84:
77:
73:
70:
64:
42:an advertisement
33:
32:
25:
2256:
2255:
2251:
2250:
2249:
2247:
2246:
2245:
2211:
2210:
2202:
2197:
2190:
2186:
2179:
2175:
2165:
2163:
2154:
2153:
2149:
2144:
2140:
2127:
2126:
2122:
2115:
2111:
2104:
2100:
2095:Wayback Machine
2086:
2082:
2077:Wayback Machine
2068:
2064:
2059:Wayback Machine
2050:
2046:
2041:Wayback Machine
2032:
2028:
2023:Wayback Machine
2014:
2010:
2005:Wayback Machine
1996:
1992:
1983:
1979:
1970:
1969:
1965:
1958:
1954:
1947:
1943:
1938:Wayback Machine
1929:
1925:
1918:
1914:
1907:
1903:
1896:
1892:
1885:
1881:
1871:
1869:
1860:
1859:
1855:
1845:
1843:
1834:
1833:
1829:
1819:
1817:
1808:
1807:
1803:
1798:Wayback Machine
1789:
1785:
1778:
1774:
1767:
1763:
1758:Wayback Machine
1749:
1745:
1735:
1733:
1724:
1723:
1719:
1714:Wayback Machine
1705:
1701:
1696:Wayback Machine
1687:
1683:
1678:
1674:
1667:
1663:
1656:
1652:
1645:
1641:
1636:
1632:
1624:
1620:
1615:
1611:
1602:
1601:
1597:
1588:
1587:
1583:
1578:
1574:
1569:
1565:
1558:
1554:
1547:
1543:
1536:
1532:
1525:
1521:
1516:Wayback Machine
1507:
1503:
1496:
1492:
1487:Wayback Machine
1478:
1474:
1467:
1463:
1456:
1452:
1445:
1441:
1434:
1430:
1423:
1419:
1412:
1408:
1398:
1396:
1387:
1386:
1382:
1375:
1371:
1359:
1352:
1348:
1329:local Red Cross
1325:
1313:
1195:
1159:
1154:
1153:
1148:
1143:
1138:
1133:
1128:
1126:College Station
1123:
1118:
1113:
1108:
1103:
1098:
1093:
1088:
1083:
1078:
1028:MIL STD 45662-A
998:
993:
955:
930:ohmmeter (MTO)
735:watt-hour meter
662:
632:
627:
606:
575:
563:
561:Pax Diagnostics
524:
516:
500:
472:
455:
450:
431:
385:
341:
333:
270:
262:
191:
137:Ernest Vignoles
136:
85:
74:
68:
65:
46:
34:
30:
21:
12:
11:
5:
2254:
2252:
2244:
2243:
2241:British brands
2238:
2233:
2228:
2223:
2213:
2212:
2209:
2208:
2201:
2200:External links
2198:
2196:
2195:
2184:
2173:
2147:
2138:
2120:
2109:
2098:
2080:
2062:
2044:
2026:
2008:
1990:
1977:
1963:
1952:
1941:
1923:
1912:
1901:
1890:
1879:
1853:
1827:
1801:
1783:
1772:
1761:
1743:
1717:
1699:
1681:
1672:
1661:
1650:
1639:
1630:
1618:
1609:
1595:
1581:
1572:
1563:
1552:
1541:
1530:
1519:
1501:
1490:
1472:
1461:
1450:
1439:
1428:
1417:
1406:
1380:
1369:
1349:
1347:
1344:
1324:
1321:
1312:
1309:
1305:
1304:
1301:
1298:
1295:
1292:
1286:
1283:
1280:
1277:
1276:test equipment
1271:
1268:
1265:
1262:
1259:
1256:
1253:
1250:
1247:
1244:
1241:
1238:
1235:
1232:
1229:
1226:
1194:
1191:
1158:
1155:
1149:
1144:
1139:
1134:
1129:
1124:
1119:
1114:
1109:
1104:
1099:
1094:
1089:
1084:
1079:
1074:
1049:EMC laboratory
1045:
1044:
1039:
1034:
1029:
1026:
1023:
1020:
997:
994:
992:
989:
954:
951:
948:
947:
944:
940:
939:
936:
932:
931:
925:
921:
920:
913:
909:
908:
901:
897:
896:
893:
889:
888:
885:
881:
880:
877:
873:
872:
869:
865:
864:
858:
854:
853:
847:
843:
842:
836:
832:
831:
828:
824:
823:
820:
816:
815:
812:
808:
807:
804:Microprocessor
801:
797:
796:
793:
789:
788:
785:
781:
780:
774:
770:
769:
762:
758:
757:
756:fault locator
751:
747:
746:
743:
739:
738:
731:
727:
726:
723:
719:
718:
715:
711:
710:
707:
703:
702:
699:
661:
658:
631:
628:
626:
623:
605:
602:
574:
571:
562:
559:
523:
520:
515:
512:
499:
496:
471:
468:
454:
451:
449:
446:
430:
427:
384:
381:
340:
337:
332:
329:
269:
266:
261:
258:
206:
205:
203:www.Megger.com
200:
196:
195:
192:
189:
186:
185:
182:
178:
177:
174:
170:
169:
143:
139:
138:
133:
129:
128:
125:
121:
120:
117:
113:
112:
107:
103:
102:
87:
86:
57:external links
37:
35:
28:
13:
10:
9:
6:
4:
3:
2:
2253:
2242:
2239:
2237:
2234:
2232:
2229:
2227:
2224:
2222:
2219:
2218:
2216:
2207:
2204:
2203:
2199:
2193:
2188:
2185:
2182:
2177:
2174:
2161:
2157:
2151:
2148:
2142:
2139:
2134:
2130:
2124:
2121:
2118:
2113:
2110:
2107:
2102:
2099:
2096:
2092:
2089:
2084:
2081:
2078:
2074:
2071:
2066:
2063:
2060:
2056:
2053:
2048:
2045:
2042:
2038:
2035:
2030:
2027:
2024:
2020:
2017:
2012:
2009:
2006:
2002:
1999:
1994:
1991:
1987:
1981:
1978:
1973:
1967:
1964:
1961:
1956:
1953:
1950:
1945:
1942:
1939:
1935:
1932:
1927:
1924:
1921:
1916:
1913:
1910:
1905:
1902:
1899:
1894:
1891:
1888:
1883:
1880:
1867:
1863:
1857:
1854:
1841:
1837:
1831:
1828:
1815:
1811:
1805:
1802:
1799:
1795:
1792:
1787:
1784:
1781:
1776:
1773:
1770:
1765:
1762:
1759:
1755:
1752:
1747:
1744:
1731:
1727:
1721:
1718:
1715:
1711:
1708:
1703:
1700:
1697:
1693:
1690:
1685:
1682:
1676:
1673:
1670:
1665:
1662:
1659:
1654:
1651:
1648:
1643:
1640:
1634:
1631:
1628:
1622:
1619:
1613:
1610:
1605:
1599:
1596:
1591:
1585:
1582:
1576:
1573:
1567:
1564:
1561:
1556:
1553:
1550:
1545:
1542:
1539:
1534:
1531:
1528:
1523:
1520:
1517:
1513:
1510:
1505:
1502:
1499:
1494:
1491:
1488:
1484:
1481:
1476:
1473:
1470:
1465:
1462:
1459:
1454:
1451:
1448:
1443:
1440:
1437:
1432:
1429:
1426:
1421:
1418:
1415:
1410:
1407:
1394:
1390:
1384:
1381:
1378:
1373:
1370:
1366:
1362:
1357:
1355:
1351:
1345:
1343:
1341:
1336:
1334:
1330:
1322:
1320:
1318:
1310:
1308:
1302:
1299:
1296:
1293:
1290:
1287:
1284:
1281:
1279:Relay testers
1278:
1275:
1272:
1269:
1266:
1263:
1260:
1257:
1254:
1251:
1248:
1245:
1242:
1239:
1236:
1233:
1230:
1227:
1224:
1223:
1222:
1215:
1207:
1199:
1192:
1190:
1188:
1184:
1180:
1176:
1171:
1169:
1165:
1164:RS Components
1156:
1152:
1147:
1142:
1137:
1132:
1127:
1122:
1117:
1112:
1107:
1102:
1097:
1092:
1087:
1082:
1077:
1072:
1067:
1065:
1061:
1060:ISO 9001:2000
1056:
1054:
1050:
1043:
1040:
1038:
1035:
1033:
1030:
1027:
1024:
1021:
1018:
1017:
1016:
1014:
1009:
1002:
996:Manufacturing
995:
990:
988:
986:
981:
979:
975:
970:
968:
964:
960:
952:
945:
942:
941:
937:
934:
933:
929:
926:
923:
922:
918:
914:
911:
910:
906:
902:
899:
898:
894:
891:
890:
886:
883:
882:
878:
875:
874:
870:
867:
866:
862:
859:
856:
855:
851:
848:
845:
844:
840:
837:
834:
833:
829:
826:
825:
821:
818:
817:
813:
810:
809:
805:
802:
799:
798:
794:
791:
790:
786:
783:
782:
778:
775:
772:
771:
767:
763:
760:
759:
755:
752:
749:
748:
744:
741:
740:
736:
733:Multistation
732:
729:
728:
724:
721:
720:
716:
713:
712:
708:
705:
704:
700:
697:
696:
690:
685:
681:
679:
670:
666:
659:
657:
655:
651:
646:
643:
639:
637:
629:
624:
622:
618:
614:
610:
603:
601:
599:
595:
590:
586:
579:
572:
570:
568:
560:
558:
556:
552:
547:
545:
541:
537:
533:
529:
521:
519:
513:
511:
509:
505:
497:
495:
491:
489:
485:
481:
477:
469:
467:
464:
461:
458:
452:
448:Present times
447:
445:
442:
440:
436:
428:
426:
424:
419:
417:
411:
409:
404:
402:
398:
389:
382:
380:
376:
372:
368:
364:
361:
359:
354:
345:
338:
336:
330:
328:
326:
321:
319:
314:
312:
308:
302:
300:
294:
292:
282:
274:
267:
265:
259:
257:
255:
251:
247:
243:
242:power quality
239:
236:testing, low
235:
231:
227:
222:
220:
212:
204:
201:
197:
193:
187:
183:
179:
175:
171:
167:
163:
159:
155:
151:
150:Dallas, Texas
147:
144:
140:
134:
130:
126:
122:
118:
114:
111:
108:
104:
100:
95:
83:
80:
72:
69:February 2017
62:
58:
54:
50:
44:
43:
38:This article
36:
27:
26:
23:
19:
2187:
2176:
2164:. Retrieved
2160:the original
2150:
2141:
2132:
2123:
2112:
2101:
2083:
2065:
2047:
2029:
2011:
1993:
1980:
1966:
1955:
1944:
1926:
1915:
1904:
1893:
1882:
1870:. Retrieved
1866:the original
1856:
1844:. Retrieved
1840:the original
1830:
1818:. Retrieved
1814:the original
1804:
1786:
1775:
1764:
1746:
1734:. Retrieved
1730:the original
1720:
1702:
1684:
1675:
1664:
1653:
1642:
1633:
1621:
1612:
1598:
1584:
1575:
1566:
1555:
1544:
1533:
1522:
1504:
1493:
1475:
1464:
1453:
1442:
1431:
1420:
1409:
1397:. Retrieved
1393:the original
1383:
1372:
1360:
1337:
1326:
1314:
1306:
1220:
1172:
1160:
1146:Johannesburg
1131:Valley Forge
1075:
1057:
1046:
1010:
1007:
982:
971:
967:earth clamps
956:
915:Three-phase
675:
663:
647:
644:
640:
633:
619:
615:
611:
607:
591:
587:
584:
564:
548:
525:
517:
501:
492:
476:Pennsylvania
473:
465:
462:
459:
456:
443:
432:
420:
412:
405:
394:
377:
373:
369:
365:
362:
350:
334:
322:
315:
303:
295:
287:
263:
234:earth/ground
223:
218:
217:
184:€250 m
158:Pennsylvania
154:Valley Forge
142:Headquarters
106:Company type
75:
66:
51:by removing
47:Please help
39:
22:
1509:Megger MJ15
1261:Oil testers
1258:Multimeters
928:Transformer
917:transformer
764:Protective
737:test board
650:copyrighted
567:transformer
536:micrometers
246:multimeters
240:measuring,
18:Megohmmeter
2215:Categories
2166:21 January
2133:megger.com
1872:21 January
1862:"Power DB"
1846:21 January
1820:21 January
1736:21 January
1399:21 January
1346:References
1342:(NAWRTC).
1331:after the
678:ergonomics
630:Trademarks
546:, Sweden.
353:multimeter
238:resistance
164:(Sweden),
49:improve it
1986:Quarterly
1136:Oberursel
1064:ISO 14001
1037:ISO 17025
1032:ISO 10012
1013:metrology
768:test set
687:Megger's
613:efforts.
551:GE Energy
522:Programma
423:arc flash
299:trademark
168:(Germany)
2091:Archived
2073:Archived
2055:Archived
2037:Archived
2019:Archived
2001:Archived
1934:Archived
1794:Archived
1754:Archived
1710:Archived
1692:Archived
1512:Archived
1483:Archived
1311:Research
1274:Recloser
1151:Chonburi
1086:Danderyd
991:Products
959:ohmmeter
555:Danderyd
408:ISO 9001
307:Bakelite
173:Products
162:Danderyd
116:Industry
1323:Charity
1291:testers
1187:Bahrain
1106:Toronto
1101:Bahrain
1096:Beijing
980:PFL40.
850:Windows
701:Device
660:Patents
573:SebaKMT
528:Swedish
514:PowerDB
488:battery
484:Chicago
260:History
256:, etc.
199:Website
181:Revenue
166:Baunach
132:Founder
124:Founded
110:Private
2129:"Home"
1185:, and
1183:Sydney
1179:Mumbai
1141:Aargau
1121:Dallas
1116:Mumbai
1091:Sydney
953:Awards
504:Dallas
498:States
470:Biddle
453:Megger
397:Dallas
311:dynamo
148:(UK);
1175:Paris
1111:Paris
1081:Dover
943:2011
935:2010
924:2010
912:2009
900:2007
892:2005
884:2003
876:2003
868:2000
857:1999
846:1996
835:1994
827:1990
819:1990
811:1989
800:1985
792:1979
784:1968
773:1953
766:relay
761:1951
754:Cable
750:1950
742:1942
730:1928
722:1923
714:1908
706:1889
698:Year
691:MTDR1
508:Texas
416:Paris
401:Texas
230:cable
146:Dover
2168:2009
1874:2009
1848:2009
1822:2009
1738:2009
1401:2009
1051:and
1025:NIST
905:RCCB
596:for
544:Täby
538:and
194:1350
127:1889
1053:SMD
839:DSP
482:of
439:EMI
339:AVO
2217::
2131:.
1363:,
1353:^
1189:.
1181:,
1177:,
1170:.
1066:.
987:.
600:.
557:.
534:,
506:,
418:.
399:,
358:DC
327:.
248:,
156:,
152:;
2170:.
2135:.
1876:.
1850:.
1824:.
1740:.
1606:.
1592:.
1403:.
82:)
76:(
71:)
67:(
63:.
45:.
20:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
