The ATR-01 S3 can measure transformer turns-ratios ranging from 0.8 to 15,000 and can be used to test voltage regulators, power transformers, current transformers(CT), and potential transformers (PT).

The ATRT-01S3 also measures and displays transformer- winding excitation current, winding polarity, and winding phase angle.

Test results are displayed on a back-lit LCD screen(128 x 64 pixels) that is viewable in bright sunlight and low-light conditions.

In addition to measuring a transformer’s turns-ratio, the transformer’s name plate voltages can also be entered, and the ATRT-01 S3 will then display the turns-ratio percentage error.

This convenient feature eliminates any user calculation errors when testing transformers.
When testing a 3-phase transformer, the ATRT-01 S3 provides connection information (H and X test leads to the transformer bushings) for phase A, B and C tests.
The three phase test results (turns-ratio, excitation current, winding polarity, phaseangle, and percentage error) are displayed on the LCD screen.

outstanding features :
• Standalone or computer-controlled
• Inexpensive
• Displays turns-ratio from 0.8 ¬ 15,000
• Calculates turns-ratio percentage error
• Displays winding polarity and phase angle
• Displays excitation current
• Battery or AC-powered (ATRT-01B S3 only)