Cable Insulation Test Form

The megger insulation tester is essentially a high range resistance meter ohmmeter with a built in direct current generator.

Cable insulation test form.

The method of measuring the insulation resistance is to test and assess the state of the isolation head and body. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. For good insulation the resistance usually reads in the megohm range. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms.

The insulation condition from values that are only relative. The meggering should be carried out at initial stages before and after cable laying. Meggering of signalling cable is done to test the continuity and insulation of the cable conductors. Each core to ground continuity point to wire check with low voltage tester check correct installation of cable glands check cable identification tags check that.

For maintenance purposes these tests shall be performed periodically. For good insulation the resistance usually reads in the megohm range. Insulation resistance testing is a non destructive test procedure. It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs.

Because electrical insulation will exhibit dynamic behavior during the course of your test. Locate the connection point of the wire or cable you want to test so you have access to the exposed conductors. If the insulation resistance falls below an accepted user dictated value or falling rapidly over time then cable. Between signal wires 2.

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. Insulation resistance testing purpose. The test measures the insu lation resistance between the phases and or between phase and ground. 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 relatively same environmental parameters each and every time.

During testing all cables and wiring must be completely disconnected from any equipment. Clamp the alligator clip on one of the. Screens shall be checked as common conductors. This type of test is a form of preventative maintenance.

A cable insulation test is basically a continuity test so the power to the circuit must be off. The megger insulation tester is essentially a high range resistance meter. Low insulation of cable leads to inadvertent energisation or de energisation of circuits.