Insulation Resistance Test Levels

Developed early in the 20th century the insulation resistance ir test is the oldest and most widely used test for assessing the quality of insulation.

Insulation resistance test levels.

The insulation resistance test is the second test required by the electrical safety testing standards. The measured resistance indicates the condition of the insulation between two conductive parts. 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. Insulation resistance decreases in temperature or moisture.

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. 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. Because electrical insulation will exhibit dynamic behavior during the course of your test. 230v to measure insulation resistance in ohm s.

An infinite resistance would be the perfect result. Since 80 of electrical maintenance and testing. Test results are dependent on the temperature of the insulating material and the humidity of the surrounding environment at the time of the test. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms.

When performing insulation resistance testing you must maintain consistency. 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 insulation resistance test consists in measuring the insulation resistance of a. Insulation resistance test values use these values in the absence of consensus standards dealing with insulation resistance tests.