Cable Insulation Resistance Test Report Format

2 wires for resistances 1 ω and 4 wires for resistances 1 ω.

Cable insulation resistance test report format.

Insulation resistance testing purpose. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. The test measures the insu lation resistance between the phases and or between phase and ground. Since 80 of electrical maintenance and testing.

The international electrical testing association neta specification maintenance testing specifications for electrical power distribution equipment and. Applied potential shall be 500 volts dc for 300 volt rated cable and 1000 volts dc for 600 volt rated cable. Historically many field electricians use the somewhat arbitrary standard of 1 megohm per kv. It is important to guard against electric shocks and avoid equipment damage from accidental discharges.

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. Insulation resistance testing is a non destructive test procedure. This test is used to detect conductor insulation damage that may have been caused during installation. Low insulation of cable leads to inadvertent energisation or de energisation of circuits.

Test duration shall be one minute. Perform insulation resistance test on each conductor with respect to ground and adjacent conductors. The continuity test can be made in 2 or 4 wires according to the resistance to be measured. Perform resistance measurements through bolted connections with low resistance ohmmeter.

An insulation resistance test is typically performed on de energized wire and cable immediately after installation and before termination to any equipment or accessories. The method of measuring the insulation resistance is to test and assess the state of the isolation head and body. It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs. 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.

Templates test reports forms tags. Continuity test report insulation resistance test form ir test sheet test sheets post navigation battery autonomy test report for fire alarm system testing commissioning report smdb. Insulation resistance decreases in temperature or moisture. For maintenance purposes these tests shall be performed periodically.

The meggering should be carried out at initial stages before and after cable laying. Also acceptable values of insulation resistance depend upon the equipment you re testing.