Three-Phase Transformer Turns Ratio Testers

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TRT03 Series

TRT30 Series

TRT33 Series

TRT4x Series

TRT63 Series

Turns Ratio Testers TRT03 series

The TRT03 series are the first TRT series released by DV Power. These devices can output single-phase test voltage.

TRT03A TRT03B TRT03C
TEST VOLTAGES (8,40,100) V AC (10,40,100) V AC (8,40,80) V AC
RATIO RANGE 0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
BEST RATIO ACCURACY 0,05 % 0,05 % 0,05 %
EXCIT. CURRENT RANGE 0 – 2 A 0 – 2 A 0 – 2 A
EXCIT. CURR. ACCURACY ±(0,25% + 500 µA) ±(0,25% + 500 µA) ±(0,25% + 500 µA)
BEST EXCIT. CURR. RESOLUTION 0,1 µA 0,1 µA 0,1 µA
PHASE ANGLE RANGE 360 Degrees 360 Degrees 360 Degrees
PHASE ANGLE ACCURACY ±0,05 Degrees ±0,05 Degrees ±0,05 Degrees
PHASE ANGLE RESOLUTION 0,01 Degree 0,01 Degree 0,01 Degree
USB FLASH DRIVE FEATURE yes yes yes
BUILT-IN TC CONTROL yes yes yes
BUILT-IN THERMAL PRINTER OPTIONAL OPTIONAL OPTIONAL

Turns Ratio Testers TRT30 series

The TRT30 series can output both true three-phase and single-phase test voltage.

TRT30A TRT30B TRT30C
TEST VOLTAGES (8,40,100) V AC
3x(8,40,100)√3 V AC
(10,40,100) V AC
3x(10,40,100)√3 V AC
(8,40,80) V AC
3x(8,40,80)√3 V AC
RATIO RANGE 0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
BEST RATIO ACCURACY 0,05 % 0,05 % 0,05 %
EXCIT. CURRENT RANGE 0 – 2 A 0 – 2 A 0 – 2 A
EXCIT. CURR. ACCURACY ±(0,25% + 500 µA) ±(0,25% + 500 µA) ±(0,25% + 500 µA)
BEST EXCIT. CURR. RESOLUTION 0,1 µA 0,1 µA 0,1 µA
PHASE ANGLE RANGE 360 Degrees 360 Degrees 360 Degrees
PHASE ANGLE ACCURACY ±0,05 Degrees ±0,05 Degrees ±0,05 Degrees
PHASE ANGLE RESOLUTION 0,01 Degree 0,01 Degree 0,01 Degree
USB FLASH DRIVE FEATURE yes yes yes
BUILT-IN TC CONTROL yes yes yes
BUILT-IN THERMAL PRINTER OPTIONAL OPTIONAL OPTIONAL

Turns Ratio Testers TRT33 series

The TRT33 series have additional test voltage of 1 V AC. This voltage is necessary for testing current transformers.

TRT33A TRT33B TRT33C
TEST VOLTAGES (1,8,40,100) V AC
3x(1,8,40,100)√3 V AC
(1,10,40,100) V AC
3x(1,10,40,100)√3 V AC
(1,8,40,80) V AC
3x(1,8,40,80)√3 V AC
RATIO RANGE 0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
BEST RATIO ACCURACY 0,05 % 0,05 % 0,05 %
EXCIT. CURRENT RANGE 0 – 2 A 0 – 2 A 0 – 2 A
EXCIT. CURR. ACCURACY ±(0,25% + 500 µA) ±(0,25% + 500 µA) ±(0,25% + 500 µA)
BEST EXCIT. CURR. RESOLUTION 0,1 µA 0,1 µA 0,1 µA
PHASE ANGLE RANGE 360 Degrees 360 Degrees 360 Degrees
PHASE ANGLE ACCURACY ±0,05 Degrees ±0,05 Degrees ±0,05 Degrees
PHASE ANGLE RESOLUTION 0,01 Degree 0,01 Degree 0,01 Degree
USB FLASH DRIVE FEATURE yes yes yes
BUILT-IN TC CONTROL yes yes yes
BUILT-IN THERMAL PRINTER OPTIONAL OPTIONAL OPTIONAL

Turns Ratio Testers TRT40 series

The TRT40 series have the highest test voltage of 125 V AC. Together with Extension Transformer CVT40 it can output up to 5 kV AC.

TRT40A
TEST VOLTAGES (8,40,125) V AC
3x(8,40,125)√3 V AC
RATIO RANGE 0,8 to 50 000
(5-digit Resolution)
BEST RATIO ACCURACY 0,05 %
EXCIT. CURRENT RANGE 0 – 2 A
EXCIT. CURR. ACCURACY ±(0,25% + 500 µA)
BEST EXCIT. CURR. RESOLUTION 0,1 µA
PHASE ANGLE RANGE 360 Degrees
PHASE ANGLE ACCURACY ±0,05 Degrees
PHASE ANGLE RESOLUTION 0,01 Degree
USB FLASH DRIVE FEATURE yes
BUILT-IN TC CONTROL yes
BUILT-IN THERMAL PRINTER OPTIONAL

Turns Ratio Testers TRT43 series

The TRT43 series have the additional test voltage of 1 V AC, which is necessary for testing current transformers. Together with Extension Transformer CVT40 it can output up to 5 kV AC.

TRT43A
TEST VOLTAGES (1,8,40,125) V AC
3x(1,8,40,125)√3 V AC
RATIO RANGE 0,8 to 50 000
(5-digit Resolution)
BEST RATIO ACCURACY 0,05 %
EXCIT. CURRENT RANGE 0 – 2 A
EXCIT. CURR. ACCURACY ±(0,25% + 500 µA)
BEST EXCIT. CURR. RESOLUTION 0,1 µA
PHASE ANGLE RANGE 360 Degrees
PHASE ANGLE ACCURACY ±0,05 Degrees
PHASE ANGLE RESOLUTION 0,01 Degree
USB FLASH DRIVE FEATURE yes
BUILT-IN TC CONTROL yes
BUILT-IN THERMAL PRINTER OPTIONAL

Turns Ratio Testers TRT63 series

The most advanced series is TRT63. Besides the highest 250 V AC test voltage, which is actually ~430 V AC phase to phase, this series has better turns ratio accuracy and better turns ratio range.

TRT63A TRT63B TRT63C
TEST VOLTAGES (1,8,40,100,250) V AC
3x(1,8,40,100,250)√3 V AC
(1,10,40,100,250) V AC
3x(1,10,40,100,250)√3 V AC
(1,8,40,80,250) V AC
3x(1,8,40,80,250)√3 V AC
RATIO RANGE 0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
0,8 to 50 000
(5-digit Resolution)
BEST RATIO ACCURACY 0,03 % 0,03 % 0,03 %
EXCIT. CURRENT RANGE 0 – 2 A 0 – 2 A 0 – 2 A
EXCIT. CURR. ACCURACY ±(0,25% + 500 µA) ±(0,25% + 500 µA) ±(0,25% + 500 µA)
BEST EXCIT. CURR. RESOLUTION 0,1 µA 0,1 µA 0,1 µA
PHASE ANGLE RANGE 360 Degrees 360 Degrees 360 Degrees
PHASE ANGLE ACCURACY ±0,05 Degrees ±0,05 Degrees ±0,05 Degrees
PHASE ANGLE RESOLUTION 0,01 Degree 0,01 Degree 0,01 Degree
USB FLASH DRIVE FEATURE yes yes yes
BUILT-IN TC CONTROL yes yes yes
BUILT-IN THERMAL PRINTER OPTIONAL OPTIONAL OPTIONAL

TRT series

The TRT cables are interchangeable with TWA cables.

By using DV-Win software, it is possible to create test plans and to prepare test settings in advance. All test results are displayed both numerically and graphically for easier analysis.

All TRT devices are equipped with a USB flash drive feature for easy transfer of test results to USB flash drive.

All TRT devices have built-in tap changer control unit that allows remote tap change and also automatic turns ratio measurement of tap changers.

Built-in 112 mm thermal printer is an option.

TRTC Verification Calibrator

Reference transformer for accuracy verification of three-phase transformer turns ratio testers TRT

The TRTC Verification Calibrator is optional accessory that can be used as a reference transformer for the verification of the accuracy of the Three-phase Transformer Turns Ratio Tester TRT. The TRTC Verification Calibrator is available for both single-phase and three-phase test, with ranges up to 4800 and test voltages from 1 V to 250√3 V.

Click here to download TRTC brochure

Extension Transformer CVT40

Booster transformer used together with TRT4x turns ratio testers to produce 5 kV AC necessary for testing capacitive voltage transformers
Booster transformer used together with TRT4x turns ratio testers to produce 5 kV AC necessary for testing capacitive voltage transformers

CVT40 is an extension transformer which is used together with DV Power TRT4x series to test capacitive voltage transformers. With this extension, the TRT4x series output voltage is increased 40 times, up to 5 kV AC.

TWA-TRT Safety Switchbox

TWA-TRT Safety Switchbox

The TWA-TRT Safety Switchbox is an optional accessory for TWA series of Tap Changer & Winding Analyzers and TRT series of Transformer Turns Ratio Tester, which share the common test leads. It ensures the safety of the operator during the change of test leads from one instrument to the other by safely grounding the test leads during the change of instruments.

Click here to download the brochure

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