True 3 Phase Transformer Turns Ratiometer

  • Guaranteed accuracy ±0.05% from -20°C to +50°C
  • 3Ø test voltage - up to 250V
  • 3Ø step up ratio (patent pending)
  • Phase shifting & zig-zag transformers tested easily and accurately
  • Smallest/lightest 3Ø test set on the market
  • Fast 3Ø tests - less than 10 second

The NEW Megger TTRU3 transformer turns ratiometer uses a revolutionary design to perform a complete series of measurements on a transformer, including 3Ø step up turns ratio testing (patent pending). 3Ø voltage output offers numerous advantages to testing with today’s busy schedules. 

The TTRU3 is an important tool for determining the mechanical condition of transformers. All ratio tests are performed in one instrument, with only one 3Ø lead-set connection. The TTRU3 utilizes the latest 7 in. (180 mm) color touch display, as well as an optional printer so results are never lost. This is complimented with remote control which can be operated from a PC, as well as the ability to download results to a USB memory device.

Step up your transformer testing with TTRU3

Technical Documents
Technical guide
One touch OLTC with the TTRU3
Technical guide
Transformer Turns Ratio Test: Some Unknown Facts
Technical guide
TTRU3 - 1 phase vs 3 phase
Technical guide
TTRU3 - Magnetic Balance
Technical guide
TTRU3 - Step up vs Step down
Technical guide
TTRU3 Calibration verification
Technical guide
TTRU3 Factory ratio testing of power transformer
TTRU3 2.2.4
TTRU3 Embedded Software
** Once downloaded, the zip file must be extracted before copying the .gz file to the root of a thumb drive **
87.8 MB | 24/08/20
TTRU3 PC Software
42.0 MB | 24/08/20