TRF-250
Automatic 250 Vac 3-Phase Transformer Turns Ratio Test with LTC control
Highly-accurate turns ratio readings, ease of operation, and reliability
The TRF-250 is Vanguard’s fourth generation transformer turns ratio tester. This latest design provides a higher turns-ratio test voltage of 250Vac, provides 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-250 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-250 can be used as a standalone unit or can be computer-controlled.
ALL VANGUARD TRANSFORMER TESTERS
FEATURES
- Ratio Range: 0.8 – 50,000 to 1
- Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards
- 4 test voltages: 4Vac, 40Vac, 100Vac, and 250Vac
- Phase angle and excitation current measurement
- Bluetooth and USB PC interfaces
- 4.5-inch wide thermal printer (optional)
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) |
| OPERATING VOLTAGE | 100 – 240 Vac, 50/60 Hz |
| MEASUREMENT METHOD | ANSI/IEEE C57.12.90 |
| TURNS-RATIO MEASURING RANGE | 0.8 – 50,000 to 1 |
| TURNS-RATIO ACCURACY | 0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.25%, 4,000 – 14,999: ±1%, 15,000 – 50,000: ±2% @ 4 Vac 0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.20%, 4,000 – 14,999: ±1%, 15,000 – 50,000: ±1.5% @ 40 Vac 0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.20%. 4,000 – 14,999: ±1%, 15,000 – 50,000: ±1.5% @ 100 Vac 0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.15%. 4,000 – 14,999: ±0.8%, 15,000 – 50,000: ±1.2% @ 250 Vac |
| TEST VOLTAGES | 4 Vac @ 1 Amp, 40 Vac @ 200 mA, 100 Vac @ 100 mA, 250 Vac @ 50 mA |
| EXCITATION CURRENT READING RANGE | 0 – 2 Amperes; Accuracy: ±0.1 mA, ±2% of reading (±1 mA) |
| PHASE-ANGLE MEASUREMENT | 0 – 360 degrees; Accuracy: ±0.2 degree ( ±1 digit) |
| DISPLAY | Back-lit LCD screen (128 x 64 pixels) viewable in bright sunlight and low-light levels |
| PRINTER | Optional built-in 4.5-inch wide thermal printer |
| COMPUTER INTERFACES | Bluetooth, USB port |
| EXTERNAL DATA STORAGE | One USB Flash drive interface port; Up to 999 transformer test records can be stored on a USB Flash drive (not included) |
| INTERNAL TEST RECORD STORAGE | Can store 112 transformer test records internally. Each record holds the test record header and up to 99 readings. |
| INTERNAL TEST PLAN STORAGE | Can store 128 transformer test plans internally. Test plans can be transferred to the unit from the PC via Bluetooth/USB port or via the USB Flash drive interface |
| PC SOFTWARE | Windows®-based Transformer Turns Ratio Analyzer application is included with purchase price |
| LOAD TAP CHANGER CONTACT | 240 Vac, 2 Amps |
| SAFETY | Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 standards |
| ENVIRONMENT | Operating: -10˚ to 50˚ C (15˚ to +122˚ F); Storage: -30˚ C to 70˚ C (-22˚ to +158˚ F) |
| 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 | Transportation case |
| WARRANTY | One year on parts and labor |
| Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F). | |
PART #s
- 9105-UC [TRF-250]
- 9105-PR [TRF-250 built-in thermal printer option]
- 9105-SC [TRF-250 shipping case]
RESOURCES
- TRF-250 Datasheet
- TRF-250 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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