Cable Insulation Tester

The megger insulation tester is essentially a high range resistance meter.

Cable 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. The insulation resistance test a k a the megger test is as relevant as ever and in many applications is preferred to other insulation test methods. The insulation condition from values that are only relative. With advanced performance the insulation tester line is designed to be safe simple to use and gimmick free.

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. For good insulation the resistance usually reads in the megohm range. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. 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.

A cable insulation resistance test is a test that is performed by applying 500 v or more between the conductor and ground and measuring the resulting leakage current. Because electrical insulation will exhibit dynamic behavior during the course of your test.