Insulation Resistance Test Results

This is one factor that generates the continued popularity of analog testers.

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. 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. Insulation resistance is calculated using an insulation resistance tester. Insulation resistance is temperature sensitive.

How and where these two leads are connected will differ depending on what the test subject may be. The insulation resistance test is an electrical test which uses a certain type and level of voltage 500v d c. 230v to measure insulation resistance in ohm s. 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.

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

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. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. What affects insulation resistance readings. For low voltage installations i e.

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. 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. The measured resistance indicates the condition of the insulation between two conductive parts. A megger sends voltage through a cable and measures any current leakage in megohms 1 000 ohms.

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 results obtained from ir test are not intended.