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Transformer Ratio Meter, Single Phase, Three Phase, 0.8 to 10000, 100 mA, 0 A


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Manufacturer Part No:
Newark Part No.:
Technical Datasheet:
TTR20-1   Datasheet
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Product Information

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Single Phase, Three Phase

0.8 to 10000



Single Phase, Three Phase

Normal, Reverse

Megger TTR20, Combined Test Leads, Manual


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Technical Documents (1)

CAD Downloads


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Product Overview

TTR20-1 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.
  • Simple, one-button operation
  • Lightweight, handheld
  • Battery powered (AA or LR-6)
  • Ability to record via optional printer
  • Rugged metal connectors on leads and unit
  • Measures turns ratio of 10,000:1 with high accuracy (±0.2%, 0.8 to 4000) at a low excitation voltage
  • Records ratio and phase errors for bushing CTs to an accuracy of ±0.2% nameplate


Hand-held TTR20-1, Combined test leads, “X/H” winding, 1.8m (6ft), Instruction manual.

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