Insulation Resistance Test Results

The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms.

Insulation resistance test results.

230v to measure insulation resistance in ohm s. As part of the pre test procedure it will be necessary either to record the resistance of the test leads for subtraction from the overall measurement or use the auto null function a feature found on many instruments. 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. 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.

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. A megger sends voltage through a cable and measures any current leakage in megohms 1 000 ohms. Generally two leads are connected into a circuit in order to carry out the test. 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. Insulation resistance is temperature sensitive. Since 80 of electrical maintenance and testing. For low voltage installations i e.

Insulation resistance is calculated using an insulation resistance tester. Insulation resistance decreases in temperature or moisture. 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. The insulation resistance test is an electrical test which uses a certain type and level of voltage 500v d c.

Test instruments such as a multi meter should not be used as these are unable to generate sufficient current for the test. The results obtained from ir test are not intended. This is one factor that generates the continued popularity of analog testers. 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.

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. 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.