Insulation Resistance Cable Megger Test Report Format

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.

Insulation resistance cable megger test report format.

When performing insulation resistance testing you must maintain consistency. If the insulation resistance falls below an accepted user dictated value or falling rapidly over time then cable. Available for pc ios and android. Continuity insulation signed notes.

If the cable does not pass if a cable does not pass the test the cable still may be good but additional cable evaluation should be per formed. The first thing to check is the cable testing environment and cable preparation. Insulation resistance test mohms polarity. Each core to ground continuity point to wire check with low voltage tester check correct installation of cable glands.

The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Templates test reports forms tags. Because electrical insulation will exhibit dynamic behavior during the course of your test. Properly interpreting megohmmeter readings of an insulation resistance test can help you identify faulty or damaged insulation that can lead to these problems.

If insulation resistance of the cable is found between 1000 and 100 kω km at buried temperature the subject cable should be replaced urgently within a year. Whether the dielectric is good or bad. The most secure digital platform to get legally binding electronically signed documents in just a few seconds. Routine megger tests of aged electrical cable is a prudent way to ensure your circuits are safe from arc faults that can cause circuits to be blown and safe from fire or electrical shock.

If the insulation resistance of the cable is found less than 100 kilo ohm km the subject cable must be replaced immediately on emergency basis. Comparing this result with the correct row of table 2 shows that our cable passes the insulation resistance test. Maintenance insulation resistance testing can be performed on a regular basis and the collected data used to indicate if the conductor insulation is deteriorating over time. After 1 min you should read and record the resistance value.

R1 r2 line earth line neutral. Screens shall be checked as common conductors. The megger insulation tester is essentially a high range resistance meter ohmmeter with a built in direct current generator. For good insulation the resistance usually reads in the megohm range.

During testing all cables and wiring must be completely disconnected from any equipment. Between signal wires 2. 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. Continuity test report insulation resistance test form ir test sheet test sheets.