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Megger®
Handheld Transformer Turns Ratio Testers
Transformers are very reliable devices and can provide service for a long time if maintained and serviced regularly. They are also the single most costly item in any substation. To protect against failures that can result in costly repairs and long periods of downtime, trust your transformer to the accurate and reliable test equipment from Megger. The best insurance against transformer failure is to ensure that they are properly installed and maintained. The complete line of Megger equipment make testing easy and accurate..
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  Megger Transformer Turns Ratio Testers
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  TTR20 Handheld Transformer Turns Ratio Testers
  • The Megger TTR20 is an automatic, hand-held, battery operated transformer turns ratio test set. It is used to measure the turns ratio, excitation current and polarity of windings in single- and three-phase distribution and power transformers (tested phase by phase), potential & current transformers, and tapped transformers.


  • TTR25 Handheld Transformer Turns Ratio Testers
  • The Megger TTR25 is an automatic hand-held battery operated transformer turns ratio test set. It is used to measure the turns ratio, excitation current and polarity of windings in single- and three-phase distribution and power transformers (tested phase by phase), potential & current transformers, and tapped transformers.
  • The unique design of the TTR25 allows the user to operate the test set while holding it in one hand. It effectively eliminates the user from having to kneel or bend down to operate the instrument and speeds up testing time.


    TTR100 Handheld Transformer Turns Ratio Testers
  • The latest TTR available from Megger is the TTR100, a handheld, robust, lightweight and battery operated instrument. This TTR will complement several existing Megger transformer test products and will offer switchable functions, such as winding resistance and polarity. It is the only instrument in the market place that displays both tested and expected polarity results. With a turns ratio of 20,000:1, the TTR100 offers the highest turns ratio accuracy in the industry of 0.1%. The TTR 100 is used to perform tests in the field, as well as in manufacturing facilities and repair centers. Improved testing productivity is achieved in these environments through the efficient collection and storage of large amounts of data, which can then be uploaded to a PC database for analysis and test results reporting.
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