Insulation Resistance Test Results

Test instruments such as a multi meter should not be used as these are unable to generate sufficient current for the test.

Insulation resistance test results.

As you gain more skills you ll become familiar with this behavior and be able to make maximum use of it in evaluating your test results. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. 230v to measure insulation resistance in ohm s. How and where these two leads are connected will differ depending on what the test subject may be.

Megohmmeters or meggers are testing meters used to measure the current leakage from an electrical cable by means of administering an insulation resistance test. 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. 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. Since 80 of electrical maintenance and testing.

What affects insulation resistance readings. This is one factor that generates the continued popularity of analog testers. Insulation resistance is calculated using an insulation resistance tester. Insulation resistance is temperature sensitive.

A megger sends voltage through a cable and measures any current leakage in megohms 1 000 ohms. By adding wireless communication to your insulation tester such as the example shown using fluke connect software and the fluke 1550c test results can be saved to your phone and to the cloud with a single. As a production test this test is often used as a customer acceptance test with minimum insulation resistance per unit length often specified by the customer. The measurement of insulation resistance is a common routine test performed on all types of electrical wires and cables.

The measured resistance indicates the condition of the insulation between two conductive parts. For low voltage installations i e. Generally two leads are connected into a circuit in order to carry out the test. 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.

With a little record keeping and common sense however you can get a good picture of the insulation condition from values that are only relative. Insulation resistance decreases in temperature or moisture.