Insulation Resistance Test Results

Insulation resistance decreases in temperature or moisture.

Insulation resistance test results.

How and where these two leads are connected will differ depending on what the test subject may be. 230v to measure insulation resistance in ohm s. Insulation resistance is temperature sensitive. Test instruments such as a multi meter should not be used as these are unable to generate sufficient current for the test.

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. Megohmmeters or meggers are testing meters used to measure the current leakage from an electrical cable by means of administering an insulation resistance test. What affects insulation resistance readings. 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.

Insulation resistance is calculated using an insulation resistance tester. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. 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. A megger sends voltage through a cable and measures any current leakage in megohms 1 000 ohms.

The results obtained from ir test are not intended. 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. The measured resistance indicates the condition of the insulation between two conductive parts.

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. 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. Generally two leads are connected into a circuit in order to carry out the test. For low voltage installations i e.

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