Insulation Resistance Tester Circuit Diagram

It measures the insulation level of a insulators.

Insulation resistance tester circuit diagram.

Proof testing voltages are much higher than those used in routine maintenance test methods. For low voltage installations i e. 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. Figure 2 shows the circuit diagram for.

The megger company registered the name megger in may 1903 and today offers a wide variety of ir testers. 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 tester ir tester is a maintenance device for electrical systems. 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. 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. The measured resistance has to be higher than the indicated limit from the. The insulation resistance test consists in measuring the insulation resistance of a device under test while phase and neutral are short circuited together.

If no failures occur during the measurement the test is a success. 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. 230v to measure insulation resistance in ohm s. The insulation resistance test is an electrical test which uses a certain type and level of voltage 500v d c.

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.