Insulation Resistance Test Levels

Whether the dielectric is good or bad to evaluate a number of test results on the same piece of equipment you have to conduct the test the same way and under the.

Insulation resistance test levels.

Because electrical insulation will exhibit dynamic behavior during the course of your 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. 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.

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 insulation resistance test consists in measuring the insulation resistance of a. Insulation resistance decreases in temperature or moisture. Since 80 of electrical maintenance and testing.

The insulation resistance test is an electrical test which uses a certain type and level of voltage 500v d c. Insulation resistance test values use these values in the absence of consensus standards dealing with insulation resistance tests. 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. When performing insulation resistance testing you must maintain consistency.

An infinite resistance would be the perfect result. The measured resistance indicates the condition of the insulation between two conductive parts. For low voltage installations i e. The insulation resistance test is the second test required by the electrical safety testing standards.