Insulation Resistance Test Standard Pdf

In reality this voltage surge may be due to lightning or the induction caused by a fault on a.

Insulation resistance test standard pdf.

On february 19 2009 the american national standards institute approved the neta acceptance testing. Testing and inspection environmental measurements laboratory instrumentation power and energy. 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. Insulation resistance testing is a non destructive test procedure.

The test measures the insu lation resistance between the phases and or between phase and ground. And its reasonable price makes it an excellent value. Time resistance testing method this method is fairly independent of temperature and often. Historically many field electricians use the somewhat arbitrary standard of 1 megohm per kv.

Cables for rated voltages of 1 kv um 1 2 kv and 3 kv um 3 6 kv reference number. Also acceptable values of insulation resistance depend upon the equipment you re testing. Portable measurement equipment in a wide variety of fields. Insulation resistance testing purpose.

Quickly perform advanced insulation resistance testing. Since 1989 revised editions of the acceptance testing specifications have been published in 1991 1995 1999 2003 and 2007. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Its handy size makes it easy to pack and use.

Insulation resistance testing of low voltage cables in the field. Insulation resistance decreases in temperature or moisture. Dielectric testing and insulation resistance measurement. The document uses the standard numbering system of ansi and ieee.

It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs. The international electrical testing association neta specification maintenance testing specifications for electrical power distribution equipment and. 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.