TRT03 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. TRT03 determines the transformer turns ratio by applying voltages across high voltage windings, accurately measuring voltages across the unloaded transformer windings, and then displaying the ratio of these voltages.
TRT03 is based on a state of the art technology, using the most advanced technique available today. The test set can be used to test singlephase and three-phase transformers, both with and without taps in accordance with the requirements of the IEC 60076-1 standard.
For a three-phase measurement, the test set is connected to all the three phases of a transformer to be tested. If specific vector diagrams are selected for different types of transformers, the TRT03 will run a specific test for each transformer type (i.e., single phase, Delta to wye/star, Wye/Star to delta, Delta to delta, Wye/Star to wye/star, Delta to zig-zag, etc.) without a need to switch the test hookup cables. Following the test, it displays a turns ratio, phase shift, and excitation current.
TRT03 lets users enter a transformer’s nameplate voltages for the turns ratio deviation calculation. This feature eliminates any error otherwise caused by an operator’s manual calculation. The TRT03 also compares the test result with the nameplate ratio and prints out the % of error for each test.
Operating conditions messages or error messages identify incorrect test conditions, abnormal operating condition or transformer problems. TRT03 has a very high ability to cancel electrostatic and electromagnetic interference in HV electric fields. It is achieved by a very efficient filtration. The filtration is made utilizing the proprietary hardware and software design solutions.
Mains Power Supply
Connection: according to IEC/EN60320-1; UL498, CSA 22.2
Mains supply: 90 – 264 V AC, 50/60 Hz or 110 – 350 V DC
Input power: 200 VA
Fuse: 2 A / 250 V, type F, not user replaceable
Output Data
Instrument / Test voltages
TRT03A 8, 40, 100 V AC
TRT03B 10, 40, 100 V AC
TRT03C 8, 40, 80 V AC
Measurement
Turns ratio measuring range: 0,8 – 50 000
Turns ratio resolution: 5 digits
Typical turns ratio accuracy:
@80 or 100 V AC @40 V AC
0,8 – 999: ±0,05% 0,8 – 999: ±0,05%
1 000 – 3 999: ±0,05% 1 000 – 3 999: ±0,1%
4 000 – 14 999: ±0,1% 4 000 – 14 999: ±0,2%
15 000 – 19 999: ±0,2% 15 000 – 20 000: ±0,3%
20 000 – 50 000:±0,25%
@8 or 10 V AC
0,8 – 999: ±0,05%
1 000 – 3 999: ±0,1%
4 000 – 15 000: ±0,2%
Excitation current range: 0 – 2 A
Excitation current resolution:
0,0000 – 9,9999 mA 0,1 μA
10,000 – 99,999 mA 1 μA
100,00 – 999,99 mA 10 μA
1,0000 – 2,0000 A 100 μA
Typical excitation current accuracy: ±(0,25% rdg + 500 μA)
Phase angle range: 0 – 360º
Phase angle resolution: 0,01º
Typical phase angle accuracy: ±0,05º
Display
LCD screen 20 characters by 4 lines;
LCD display with backlight, visible in bright sunlight
Interface
USB (standard)
RS232 (optional)
Data Storage
TRT03 can store up to 10 000 test results
Environmental Conditions
Operating temperature: -10 ºC – +55 ºC / 14 ºF – +131 ºF
Storage & transportation: -40 ºC – +70ºC / -40 ºF – +158 ºF
Humidity: 5% – 95% relative humidity, non condensing
Dimensions and Weight
Dimensions (W x H x D): 480 x 190 x 385 mm / 18.9 x 7.48 x 15.16 in
Weight: 8 kg / 17.6 lbs
Warranty
3 years
Printer (optional)
Built-in thermal printer
Paper width 112 mm / 4.4 in
Printer operating temperature: 0 ºC – +50 ºC / 32 ºF – +122 ºF
Printer density is guaranteed in this range: 5 ºC – +40 ºC / 41 ºF – +104 ºF
20 – 85% relative humidity, non condensing
