Insulation Resistance Tester Circuit Diagram

The insulation resistance tester ir tester is a maintenance device for electrical systems.

Insulation resistance tester circuit diagram.

Low insulation resistance may be due to the age of the installation or alternatively it may be caused by an individual circuit which would merit further investigation. The insulation resistance test is an electrical test which uses a certain type and level of voltage 500v d c. The megger company registered the name megger in may 1903 and today offers a wide variety of ir testers. Even when not required by the end customer many wire and cable manufacturers use the insulation resistance test to track their insulation manufacturing processes and.

230v to measure insulation resistance in ohm s. For low voltage installations i e. The measured resistance has to be higher than the indicated limit from the. The measured resistance indicates the condition of the insulation between two conductive parts.

The test is accomplished by applying dc voltage through the de energized circuit using an insulation tester. The results obtained from ir test are not intended to be useful in finding localized defects in the insulation as in a true hipot test but rather give information on the quality of the bulk material used as the insulation. It measures the insulation level of a insulators. Hands down without a doubt one of the most universally searched topics on ec m s website from a historical perspective is insulation resistance testing as a result some of our most popular evergreen articles like understanding insulation resistance testing continue to top the charts when it comes to most popular content.

Where the test readings of similar circuits show marked differences in insulation resistance the circuits should be investigated to identify the cause regulation 643 3 2 refers. Proof testing voltages are much higher than those used in routine maintenance test methods. If no failures occur during the measurement the test is a success. A megger insulation resistance tester is especially useful when you have carried out electrical work on your home and want to make sure you didn t damage insulation or make a wiring mistake.

The insulation resistance test is the second test required by the electrical safety testing standards.