TRT33A is a three-phase, fully automatic test set specially designed for turns ratio, phase shift and excitation current measurements of power, distribution and instrument transformers. TRT33A determines transformer turns ratio by accurately measuring the voltages across the unloaded transformer windings and then displaying a ratio of these voltages.
- Test voltages from 1 V AC up to 100 V AC
- Ratio range 0,8 – 50 000
- The best ratio accuracy of 0,05%
- Built-in tap changer control unit
- Built-in USB flash drive
- True three-phase and single-phase test
- Automatic vector group detection
- Detailed analysis of test results using DV-Win software
- Pre-programming test-plans deploying DV-Win software
- Lightweight – only 8 kg
True three-phase test voltage allows testing any type of transformer, including special transformers like phase shifting, arc furnace, rectifier transformers, etc.
|Mains Power Supply|
||according to IEC/EN60320-1; UL498, CSA 22.2|
||90 – 264 V AC, or 110 – 350 V DC|
||2 A / 250 V, type F, but not user replaceable|
||1 V, 8 V, 40 V, 100 V AC
3 x (1, 8, 40, 100)√3 V AC
||0,8 – 50 000 (5-digit resolution)|
||0 – 2 A|
||± (0,25% + 500 µA)|
||LCD screen 20 characters by 4 lines; LCD display with backlight, visible in bright sunlight|
||TRT33A is equipped with an USB port to connect to an external computer|
|Test Result Storage|
||TRT33A can store 200 transformer test records; Each test record can store 50 test readings|
||–10°C – +55°C / 14 F – 131 F|
||–40°C – +70°C / -40 F – 158 F|
||5 % – 95 % relative humidity, non condensing|
|Dimensions and Weight|
||480 mm x 190 mm x 385 mm
18.90 in x 7.48 in x 15.16 in
||8 kg / 17.5 lbs|
- Low Voltage Directive 2014/35/EU (CE Conform)
- Applicable standards, for a class I instrument, pollution degree 2,
Installation category II : IEC EN 61010-1
- CAN/CSA-C22.2 No. 61010-1
- Directive 2014/30/EU (CE Conform)
- Applicable standard EN 61326-1
All specifications listed herein are valid at the ambient temperature of + 25 °C (77°F) and with the recommended accessories included.
Specifications are subject to change without notice.
The software provides numerous advantages, such as downloading test results from the instrument, acquisition of test results, creating graphs for easier analysis, creating test reports and saving them in several different formats.
When creating test plan, the DV-Win enables automatic calculation of nameplate voltages for all tap positions. The user is allowed to edit these voltages, save the test plan and recall it onsite. All results are displayed both numerically and graphically, making analysis as easy as possible. Test report, generated with single click, can be quickly customized, and directly printed or saved.