TRF-250 A
Automatic 250 Vac 3-Phase Transformer Turns Ratio Test with LTC control, AC or Battery Power
The TRF-250A is the battery-powered version of the TRF-250. Its battery offers approximately 3 hours of continuous use. The TRF-250A features a built-in charger that allows the unit to be used while charging.
The TRF-250A provides a test voltage of 250Vac, a wireless Bluetooth PC interface, and features a 44-key “QWERTY”-style membrane keyboard. All these features greatly improve the accuracy of the turns ratio readings, ease of operation, and reliability.
The TRF-250A determines the turns ratio of the transformer under test using the IEEE C57.12.90 measurement method. The turns-ratio range is from 0.8 to 50,000 to 1. Transformer turns ratio, excitation current, and winding polarity are displayed on the built-in 128 x 64 pixels graphic LCD screen. The TRF-250A can be used as a standalone unit or can be computer-controlled.
ALL VANGUARD TRANSFORMER TESTERS
FEATURES
- Battery-powered
- Ratio range: 0.8 – 50,000 : 1
- Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards
- 4 test voltages: 4Vac, 40Vac, and 100Vac, and 250 Vac
- Phase angle and excitation current measurement
- Bluetooth and USB PC interfaces
- 4.5” wide thermal printer
CABLES
[8000-0005] USB Cable [ 6' (1.83m) ]
Cable Part Number: 8000-0005[8000-0009] H Single Phase Cable [ 15' (4.57m) ]
Cable Part Number: 8000-0009[8000-0010] H Extension Cable [ 25' (7.62m) ]
Cable Part Number: 8000-0010[8000-0011] X Single Phase Cable [ 15' (4.57m) ]
Cable Part Number: 8000-0011[8000-0012] X Extension Cable [ 25' (7.62m) ]
Cable Part Number: 8000-0012[8000-0013] H 3-Phase Cable [ 15' (4.57m) ]
Cable Part Number: 8000-0013[8000-0014] X 3-Phase Cable [ 15' (4.57m) ]
Cable Part Number: 8000-0014[8000-0015] LTC Control Cable [ 15' (4.57m) ]
Cable Part Number: 8000-0015[8000-0016] Power + Ground Combination Cable
Cable Part Number: 8000-0016
TECH SPECS
| TYPE | Portable, lightweight, automatic 3-phase transformer turns-ratio meter |
| PHYSICAL SPECIFICATIONS | 18”W x 5”H x 12”D (45.7 cm x 12.7 cm x 30.5 cm ); Weight: 20 lbs (9.1 kg) |
| INPUT POWER | 100 – 240 Vac, 50/60 Hz |
| MEASURING METHOD | ANSI/IEEE C57.12.90 |
| TURNS-RATIO MEASURING RANGE | 0.8 – 50,000 to 1 |
| BATTERIES | two lead acid batteries (12V, 2AH) provide up to 3 hours of operation |
| LTC CONTACT | 240 Vac, 2A |
| TYPICAL TURNS RATIO ACCURACY | 4 Vac: 0.8 – 1,000 (±0.08%), 1,001 – 4,000 (±0.1%), 4,001 – 15,000 (±0.25%)
40 Vac: 0.8 – 1,000 (±0.05%), 1,001 – 4,000 (±0.1%), 4,001 – 15,000 (±0.25%), 15,001 – 20,000 (±0.4%) , 20,001 – 50,000 (±0.5%) 100 Vac: 0.8 – 1,000 (±0.05%), 1,001 – 4,000 (±0.1%), 4,001 – 15,000 (±0.25%) , 15,001 – 20,000 (±0.4%), 20,001 – 50,000 (±0.5%) 250 Vac: 0.8 – 1,000 (±0.03%), 1,001 – 4,000 (±0.1%), 4,001 – 15,000 (±0.2%) , 15,001 – 20,000 (±0.4%), 20,001 – 50,000 (±0.5%) |
| TEST VOLTAGES | 4 Vac @ 120 mA, 40 Vac @ 50 mA, 100 Vac @ 20 mA, 250 Vac @ 10 mA |
| CURRENT READING RANGE | 0 – 1 Ampere, accuracy: ±0.1mA, ±2% of reading (±1 mA) |
| DISPLAY | back-lit LCD screen (128 x 64 pixels); viewable in bright sunlight and low-light levels |
| PHASE ANGLE MEASUREMENT | 0 – 360 degrees; accuracy: ±0.2 degree (±1 digit) |
| PRINTER | built-in 4.5” wide thermal printer |
| COMPUTER INTERFACES | Bluetooth, USB port |
| PC SOFTWARE | Windows®-based transformer turns-ratio analysis software is included with purchase |
| INTERNAL TEST RECORD STORAGE | stores 112 complete transformer test records, each record holding the test record header and up to 99 readings |
| INTERNAL TEST PLAN STORAGE | stores up to 128 transformer test plans; plans can be transferred to PC. |
| EXTERNAL TEST RECORD STORAGE | up to 999 test records on external USB flash drive (drive not included) |
| SAFETY | designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 standards |
| HUMIDITY | 90% RH @ 40°C (104°F) non-condensing |
| TEMPERATURE | Operating: -10°C to +50°C (+15°F to +122°F) |
| Storage: -30°C to +70°C (-22°F to +158°F) | |
| ALTITUDE | 2,000 m (6,562 ft) to full safety specifications |
| CABLES | One 15-foot (4.57m) single-phase set, one 15-foot (4.57m) 3-phase set, one 25-foot (7.62m) extension set, one safety ground, one USB, cable bag |
| OPTIONS | shipping case, 30′ (9.14 m) 3-phase H and X leads, 30′ (9.14 m) single phase H and X leads |
| WARRANTY | one year on parts and labor |
| Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F). Last updated on January 21, 2019 | |
PART #s
- 9106-UC [TRF-250A]
- 9106-SC [TRF-250A shipping case]
RESOURCES
- TRF-250A Datasheet
- TRF-250A Datasheet (Chinese)
- TRF-250 User’s Manual (English)
- TTRA S2 Software Manual (English)
- TSB (Trip Saver Box) Datasheet (English)
- 2018 Vanguard-Doble Condensed Catalog (English)
- 2018 Vanguard-Doble Condensed Catalog (Chinese)
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