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The Three-phase Transformer Turns Ratio Tester TRT series are specially designed for turns ratio, phase shift and excitation current measurement of power, distribution and instrument transformers.
The TRT03 devices generate single-phase test voltage while TRT30, TRT33 and TRT63 devices generate both single-phase and true three-phase test voltages.
When generating a single-phase excitation voltage, the TRT supplies in turn single-phase excitation test voltage to each of the three transformer primary windings. The induced voltages across each of the corresponding unloaded transformer windings are then measured; the ratio of these voltages is calculated and shown on the display. It is repeated for all three phases.
When generating true three phase voltage, the TRT generates and outputs a true three-phase excitation test voltage to the three transformer primary windings. The induced three phase voltage across the unloaded transformer windings are measured and the transformer turns ratio is calculated. |
| Turns Ratio Testers TRT03 series |
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| TEST VOLTAGES |
(8,40,100) V AC |
(10,40,100) V AC |
(8,40,80) V AC |
| RATIO RANGE |
0,8 to 15 000
(5-digit Resolution) |
0,8 to 15 000
(5-digit Resolution) |
0,8 to 15 000
(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 |
±1 mA |
±1 mA |
±1 mA |
| EXCIT. CURR. RESOLUTION |
0,1 mA |
0,1 mA |
0,1 mA |
| 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 |
| BUILT-IN THERMAL PRINTER |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| USB FLASH DRIVE FEATURE |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| BUILT-IN TC CONTROL |
YES |
YES |
YES |
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| Turns Ratio Testers TRT30 series |
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| 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 15 000
(5-digit Resolution) |
0,8 to 15 000
(5-digit Resolution) |
0,8 to 15 000
(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 |
±1 mA |
±1 mA |
±1 mA |
| EXCIT. CURR. RESOLUTION |
0,1 mA |
0,1 mA |
0,1 mA |
| 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 |
| BUILT-IN THERMAL PRINTER |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| USB FLASH DRIVE FEATURE |
YES |
YES |
YES |
| BUILT-IN TC CONTROL |
YES |
YES |
YES |
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| Turns Ratio Testers TRT33 series |
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| 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 15 000
(5-digit Resolution) |
0,8 to 15 000
(5-digit Resolution) |
0,8 to 15 000
(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 |
±1 mA |
±1 mA |
±1 mA |
| EXCIT. CURR. RESOLUTION |
0,1 mA |
0,1 mA |
0,1 mA |
| 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 |
| BUILT-IN THERMAL PRINTER |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| USB FLASH DRIVE FEATURE |
YES |
YES |
YES |
| BUILT-IN TC CONTROL |
YES |
YES |
YES |
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| Turns Ratio Testers TRT63 series |
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| 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 |
±1 mA |
±1 mA |
±1 mA |
| EXCIT. CURR. RESOLUTION |
0,1 mA |
0,1 mA |
0,1 mA |
| 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 |
| BUILT-IN THERMAL PRINTER |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| USB FLASH DRIVE FEATURE |
YES |
YES |
YES |
| BUILT-IN TC CONTROL |
YES |
YES |
YES |
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| Accessories |
| Cables and clamps |
DV Power provides DV-Win PC software, mains power cable and ground cable as standard accessories. All other test cables, H winding and X winding, 5 m, 10 m, 15 m, 20 m long, three-phase or single-phase connection, clip-end terminated and extension cables we provide as optional accessories. Our test cables can be delivered with specially designed TTA clamps or C clamps or alligator clamps. As an option we can deliver tap changer control unit with the cable and USB flash drive too.
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| TRT |
Cable bag |
Cable plastic case |
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| three-phase connection cables |
Extension cables |
TTA clamps |
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| Built-in thermal printer |
| DV Power provides devices with 112 mm paper wide built-in thermal printer, as an optional accessory. |
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| TRTC Verification Calibrator |
| The TRTC Verification Calibrator is optional accessory which 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. To download TRTC brochure click here. |
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