Cable Insulation Tester

Because electrical insulation will exhibit dynamic behavior during the course of your test.

Cable insulation tester.

The insulation condition from values that are only relative. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Whether you work on motors generators cables or switch gear the fluke digital insulation resistance testers provide noise free reliable results. Cable faults cost money and create disruption so there is an enormous demand for cable test techniques to ensure cables and joints are in good condition and to allow cable faults to be located rapidly.

The megger insulation tester is essentially a high range resistance meter. An insulation resistance tester is a test instrument that measures current that leaks through the insulation into ground. We look for corrosion on the copper cracks in the insulation moisture on the cables and many other indicators of damage to the cables. The first dc portable insulation tester was developed in 1889 by our founders sydney evershed and ernest vignoles and by 1903 was being sold as a megger insulation tester.

Whether the dielectric is good or bad to evaluate a number of test results on the same piece of equipment you have to conduct the test the same way and under the relatively same environmental parameters each and every time. For good insulation the resistance usually reads in the megohm range.