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Lightweight, rugged, and portable, this third-generation microprocessor-based automatic three-phase transformer turns-ratio tester is ideal for transformer testing at utility power substations. In addition, this tester can detect 130 different three-phase transformer types defined by ANSI, IEC, and Australian standards.
Our rentals come fully calibrated to traceable standards. Have your own instrument? We also offer calibration services for this model (CERTITTR1).
Lightweight, rugged, and portable, this third-generation microprocessor-based automatic three-phase transformer turns-ratio tester is ideal for transformer testing at utility power substations. In addition, this tester can detect 130 different three-phase transformer types defined by ANSI, IEC, and Australian standards.
Our rentals come fully calibrated to traceable standards. Have your own instrument? We also offer calibration services for this model (CERTITTR1).
This product exceeds standard shipping dimensions/weight, as such it does not qualify for free shipping. We will contact you with your shipping costs.
Capable of determining transformer turns ratio using the IEEE C57.12.90 measurement method, this tester outputs an excitation test voltage to the transformer's primary windings, sensing the secondary voltage and calculating the transformer turns. Furthermore, this tester measures turns ratios from 0.8 to 15,000.
Features
Transformer test voltages
To prevent an accidental wrong test-lead hook-up (like when the operator reverses H and X leads), this turns tester outputs a low-level test voltage to verify the hook-up condition before applying the full test voltage to the transformer. Three test voltages (8 V AC, 40 V AC, 100 V AC) allow the ATRT03 S2 to test CT’s and PT’s, as well as power transformers.
Auto-detect transformer configuration
Automatically detect 130 specific vector groups for different transformer types defined by ANSI, CEI/IEC, and Australian standards.
Internal test record storage
Up to 112 test records can be stored in this tester's Flash EEPROM memory. Each test record may contain up to 99 turns-ratio, excitation current, phase angle and nameplate voltage readings. Test records can be recalled locally or transferred to a PC via the available interfaces (RS-232C port, USB port, USB Flash drive port).
Power sources
Can be powered from a single phase 100 to 240 V AC 50/60 Hz power source. A built-in safety ground detection circuit can detect and display a ground fault problem with the AC input source.
Transformer test plans
Can store up to 128 transformer testplans in its Flash EEPROM. A test-plan is comprised of the transformer nameplate voltages for each tap setting. The calculated turns-ratio based on the nameplate voltages is compared with the measured turns-ratio to derive the percentage error and Pass/Fail results. By using a test plan, a transformer can be quickly tested and turns-ratio Pass/Fail reports can be reviewed. Test plans can be created with the PC software and can be transferred to this tester via the available interfaces (RS-232C port, USB port, USB Flash drive port).
User interface
Features a back-lit LCD screen (128 x 64 pixels) that is viewable in both bright sunlight and low-light levels. The test results screen displays the transformer turn-ratio, excitation current, phase angle, and percentage error. The unit is controlled via a rugged, 16-key, membrane keypad and a digital rotary switch.
Computer interface
In computer-controlled mode, the unit can be controlled via the RS-232C or USB interface using the included TTRA S2 transformer analysis software. This Windows™-based application can be used to run tests and to store test results on a PC. Test results can also be exported to Excel, PDF, and XML formats for further analysis.
Transformer load tap changer control
Voltage regulator or LTC tap positions can be changed remotely using the unit's built-in transformer load tap changer.
Built-in thermal printer option
Can be outfitted with an optional built-in 4.5" wide thermal printer that can be used to print test results.
USB flash drive interface
A built-in USB flash drive interface provides a convenient method for transferring test plans and test records to or from a USB flash drive. The user can store up to 999 transformer test plans and test records on a USB flash drive, and the supplied PC software can be used to view the test records.
Applications
| Typical Turns-Ratio Accuracy | 8 V AC: 0.8 to 1000 (±0.08%), 1001 to 4000 (±0.1%), 4001 to 15,000 (±0.25%) 40 V AC: 0.8 to 1000 (±0.05%), 1001 to 4000 (±0.1%), 4001 to 15,000 (±0.2%) 100 V AC: 0.8 to 1000 (±0.05%), 1001 to 4000 (±0.1%), 4001 to 15,000 (±0.2%) |
| Test Voltages | 8 V AC at 1 A, 40 V AC at 0.2 A, 100 V AC at 0.1 A |
| Input Power | 100 to 240 V AC 50/60 Hz |
| Ratio Measuring Range | 0.8 to 15,000:1 |
| Current Reading Range | 0 to 1 A, accuracy: ±0.1 mA, ±2% of reading (±1 mA) |
| Phase Angle Measurement | 0 to 360° Accuracy: ±0.2° (±1 digit) |
| ITC Contact | 240 V AC, 2 A |
| Environmental Conditions | Operating temperature: 15 to 122°F (-10 to 50°C) Storage temperature: -22 to 158°F (-30 to 70°C) Humidity: 90% RH at 104°F (40°C) non-condensing |
| Display | Back-lit LCD screen (128 x 64 pixels) viewable in bright sunlight and low-light levels |
| Altitude | 6562' (2000 m) to full safety specifications |
| Safety | Designed to meet IEC 61010 (1995), UL 61010A-1, and CSA-C22.2 standards |
| Measuring Method | ANSI/IEEE C57.12.90 |
| Dimensions | 18 x 15 x 7" (45.7 x 38.1 x 17.8 cm) |
| Weight | 20 lbs (9 kg) |
| Typical Turns-Ratio Accuracy | 8 V AC: 0.8 to 1000 (±0.08%), 1001 to 4000 (±0.1%), 4001 to 15,000 (±0.25%) 40 V AC: 0.8 to 1000 (±0.05%), 1001 to 4000 (±0.1%), 4001 to 15,000 (±0.2%) 100 V AC: 0.8 to 1000 (±0.05%), 1001 to 4000 (±0.1%), 4001 to 15,000 (±0.2%) |
| Test Voltages | 8 V AC at 1 A, 40 V AC at 0.2 A, 100 V AC at 0.1 A |
| Input Power | 100 to 240 V AC 50/60 Hz |
| Ratio Measuring Range | 0.8 to 15,000:1 |
| Current Reading Range | 0 to 1 A, accuracy: ±0.1 mA, ±2% of reading (±1 mA) |
| Phase Angle Measurement | 0 to 360° Accuracy: ±0.2° (±1 digit) |
| ITC Contact | 240 V AC, 2 A |
| Environmental Conditions | Operating temperature: 15 to 122°F (-10 to 50°C) Storage temperature: -22 to 158°F (-30 to 70°C) Humidity: 90% RH at 104°F (40°C) non-condensing |
| Display | Back-lit LCD screen (128 x 64 pixels) viewable in bright sunlight and low-light levels |
| Altitude | 6562' (2000 m) to full safety specifications |
| Safety | Designed to meet IEC 61010 (1995), UL 61010A-1, and CSA-C22.2 standards |
| Measuring Method | ANSI/IEEE C57.12.90 |
| Dimensions | 18 x 15 x 7" (45.7 x 38.1 x 17.8 cm) |
| Weight | 20 lbs (9 kg) |
