Current transformer saturation testing
June 2011
Maintenance, Test & Measurement, Calibration
Megger has launched the MCT1600B, an instrument designed to perform current transformer saturation tests and calculate the rated knee point. Tests can be performed at 50 or 60 Hz, and the knee point calculations can be done according to IEEE C57.13.1, IEC 60044-1 or IEC 60044-6.
The unit also offers the option of automatically demagnetising the CT under test. Demagnetisation prior to saturation testing helps to ensure that accurate results are obtained, a procedure recommended in ANSI C57.13.1. The set also incorporates a 500/1000 V insulation resistance test, which ensures that the CT secondary is properly insulated.
For maximum user convenience, all test results can be catalogued and stored for later retrieval. Configurable test plans can be associated with individual CTs and stored along with the results, which greatly simplifies ongoing monitoring and profiling.
A particularly versatile option is to transfer the data to Megger’s PowerDB Lite software, which has powerful facilities for generating reports in industry standard formats. PowerDB Lite can also be used to control the instrument without the need for operator intervention, thereby allowing it to be used as a fully automated computer controlled CT test system.
For more information contact Stuart Ashton, Surgetek, +27 (0)11 792 1303, [email protected], www.surgetek.co.za
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