Diagnostic Test: 1-500Hz Narrow Band Dielectric Frequency Response

PublishTime：2022-04-14

●General
■For approximately 25 years, dielectric frequency response (DFR) has been investigated and proven to provide an accurate method of determining both the moisture condition of paper + oil power transformers and bushings. Together with general insulation testing, DFR provides enhanced insulation condition of the transformer under test.
■The DFR method of testing involves measuring the insulation response at different test frequencies and uses the resultant curve to determine the level of moisture, as well as the presence of impurities. This is done by comparing the curve to a reference (ideal) insulation model curve.
■Although a complex process, modern software and hardware have automated DFR testing and the method is now accepted internationally – as evidenced by its inclusion in the CIGRE TB445 as an accepted method for moisture determination. IEEE is presently in the process of completing a new guide for use of DFR in transformer moisture assessment for both factory and field testing, which should be completed and available by 2019. Instruments like the Megger IDAX300, which was the first commercially available unit to perform this test, is a valuable tool in this determination of moisture content.

Brand of Product：	Megger
Part#：	IDAX300 、 DELTA4000 、 DELTA 4310A 、 TRAX 220 、 TDX 120 More Part#
Product Category：	More
Application：	More
Data Type：	Technical Documentation More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2018/10/28
Version Number：
Data Encoding：
Data Size：	1.4 MB

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