This item is an excellent condition used Raytech TR-MARK III 250V Transformer Turns Tester 3-Phase. Calibrated to NIST Traceable Standards on November 12, 2026 with measured data report. Includes 3-phase test leads (X and H), standard power cable, and NIST traceable calibration certificate. All pictures are of the actual unit and accessories.
This item comes with a 180 day warranty. All functions are guaranteed to work or money will be refunded.
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Raytech TR-MARK III 250V Transformer Turns Tester 3-Phase TTR NIST Calibrated
Specifications and Description
The TR-MARK III 250V is a 3-phase power transformer test instrument specially designed for professional turns ratio measurement. The professional turns ratio measurement is not just a typical pass/fail test to check that the deviation error is less than the limit values! For precise diagnosing and preventive maintenance, high precise measurement is required. In addition to precision, the TR-MARK III 250V provides useful tools such as the plotting tool on the colour touch display for this aim.
The TR-MARK III 250V can perform the full turns ratio measurement in the least possible time and in a fully automatic easiest way. For a three-phase two-winding power transformer, only one time hook up of the test clamps is required.
- Extended test voltage measurement range of up to 250V
- Automatic measurements of voltage, turns ratio, current, and phase displacement
- Easy one-time hook up to the transformer
- Automatic test voltage range
- Displays deviation from a nominal ratio
- Tap changer interface with graphic results
- Load on test object <0.05 VA
- Measures power transformers PTs and CTs
- Automatic vector group detection
- Displays % error vs. name plate value
- Enhanced heavy-duty protection circuitry
- Emergency stop push button immediately turns off output
- Internal printer
- Data storage of over 10,000 measurements
- Simple-to-operate color LCD touch screen with backlight
- Two USB interfaces
Range Accuracy at 100V or 40V Accuracy at 10V Resolution 0.8 … 2,000 ±0.06% Rdg ±1 LSD ±0.15% Rdg ±1 LSD 5 Digits 2,001 … 4,000 ±0.1% Rdg ±1 LSD ±0.3% Rdg ±1 LSD 5 Digits 4,001 … 13,000 ±0.3% Rdg ±1 LSD not specified 5 Digits 13,001 … 16,000 ±0.4% Rdg ±1 LSD 5 Digits Range Accuracy at 250V Resolution 0.8 … 5,000 ±0.06% Rdg ±1 LSD 5 Digits 5,001 … 10,000 ±0.1% Rdg ±1 LSD 5 Digits 10,001 … 32,500 ±0.3% Rdg ±1 LSD 5 Digits 32,501 … 40,000 ±0.4% Rdg ±1 LSD 5 Digits Current Accuracy Resolution 0 … 1A ±0.001A 0.1mA Phase Angle Accuracy Resolution ±90 Degree ±0.05 Degree 0.01 Degree Turns Ratio Range 0.8 to 40,000
