Insulation Resistance Test Standard Pdf

Dielectric testing and insulation resistance measurement.

Insulation resistance test standard pdf.

Power cables with extruded insulation and their accessories for rated voltages from 1 kv um 1 2 kv up to 30 kv um 36 kv part 1. The international electrical testing association neta specification maintenance testing specifications for electrical power distribution equipment and. Insulation resistance decreases in temperature or moisture. Testing and inspection environmental measurements laboratory instrumentation power and energy.

In reality this voltage surge may be due to lightning or the induction caused by a fault on a. Historically many field electricians use the somewhat arbitrary standard of 1 megohm per kv. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Also acceptable values of insulation resistance depend upon the equipment you re testing.

Time resistance testing method this method is fairly independent of temperature and often. The document uses the standard numbering system of ansi and ieee. Insulation resistance testing is a non destructive test procedure. Its handy size makes it easy to pack and use.

See the site fixed equipment for measurement and testing of electrical networks energy management and optimization systems. Since 1989 revised editions of the acceptance testing specifications have been published in 1991 1995 1999 2003 and 2007. And its reasonable price makes it an excellent value. Insulation resistance testing purpose.

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. Cables for rated voltages of 1 kv um 1 2 kv and 3 kv um 3 6 kv reference number. Quickly perform advanced insulation resistance testing. On february 19 2009 the american national standards institute approved the neta acceptance testing.

Dielectric strength testing also called breakdown testing measures an insulation s ability to withstand a medium duration voltage surge without sparkover occurring. 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.