Insulation Resistance Test Format

Z 5 date of test r eading in megohms the graph below shows an example of the insulation resistance readings on an electric motor.

Insulation resistance test format. Use megger mit1020 to measure insulation resistance. 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. The insulation resistance test consists in measuring the insulation resistance of a device under test while phase and neutral are short circuited together. Cpc 100 for vt ratio polarity test.

Insulation resistance testing is a non destructive test procedure. Insulation resistance test. Insulation resistance testing purpose. Test instrument serial no s scm ref no.

At a the insulation resistance decreases due to aging and dust accumulation. Contuinity test ohms insulation resistance test mohms polarity. When performing insulation resistance testing you must maintain consistency. The insulation resistance test consists in measuring the insulation resistance of a.

Maintenance insulation resistance testing can be performed on a regular basis and the collected data used to indicate if the conductor insulation is deteriorating over time. The test measures the insu lation resistance between the phases and or between phase and ground. It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs. 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.

Ct resistance excitation curve ratio polarity test. Because electrical insulation will exhibit dynamic behavior during the course of your test. This type of test is a form of preventative maintenance. Phase neutral size mm circuit name.

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 is the second test required by the electrical safety testing standards. Current transformer loop test. Insulation resistance decreases in temperature or moisture.

If the insulation resistance falls below an accepted user dictated value or falling rapidly over time then cable.