The TRF-100 is Vanguard’s third generation, microprocessor-based, automatic, three phase, transformer turns-ratio tester. This lightweight, portable unit is designed for testing transformers at utility power substations.
The TRF-100 determines the transformer turns-ratio using the IEEE C57.12.90 measurement method. The transformer turns-ratio (ranging from 0.8 to 50,000) is determined by precisely measuring the voltages across the unloaded transformer windings. To ensure accuracy, the TRF-100’s measuring circuitry self-calibrates before each measurement. It requires neither adjustment nor temperature compensation. The TRF-100’s turns-ratio measurement accuracy is 0.1% or better.
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Ratio Range: 0.8 - 50,000 to 1
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Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards
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3 test voltages: 4Vac, 40Vac, and 100Vac
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Phase angle and excitation current measurement
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USB PC interfaces
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4.5-inch wide thermal printer (optional)
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TRF-100
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Cables
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TRF-100
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Technical Specifications
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TYPE
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Portable, lightweight, automatic 3-phase transformer turns-ratio meter
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PHYSICAL SPECIFICATIONS
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Dimensions: 17”W x 7”H x 13”D (43.2 cm x 17.8 cm x 33.0 cm)
Weight: 14 lbs (6.4 kg)
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INPUT POWER
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100 – 120 Vac or 200 – 240 Vac (selectable), 50/60 Hz, 3 Amps
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MEASUREMENT METHOD
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ANSI/IEEE C57.12.90
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TURNS-RATIO MEASURING RANGE
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0.8 – 50,000 to 1
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TYPICAL TURNS-RATIO ACCURACY
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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%)
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TEST VOLTAGES
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4 Vac @ 1.0A, 40 Vac @ 0.6A, 100 Vac @ 0.1A
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CURRENT READING RANGE
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0 – 2 Amperes; accuracy: ±1mA, ±2% of reading (±1 digit)
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PHASE-ANGLE MEASUREMENT
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0 – 360 degrees; Accuracy: ±0.2 degree ( ±1 digit)
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DISPLAY
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back-lit LCD screen (20 characters by 4 lines)
viewable in bright sunlight and low-light levels
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PRINTER
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Optional built-in 4.5-inch wide thermal printer
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COMPUTER INTERFACE
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USB PC interface
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INTERNAL TEST RECORD STORAGE
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stores 1,000 complete transformer test records, each including nameplate voltage, turns-ratios, excitation current, and winding phase angle
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INTERNAL TEST PLAN STORAGE
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stores up to 128 transformer test plans
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PC SOFTWARE
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Windows?-based transformer turns-ratio analysis software is included with purchase
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SAFETY
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designed to meet IEC 61010 (1995), UL 61010A-1, and CSA-C22.2 standards
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TEMPERATURE
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Operating: -10? to 50? C (15? to +122? F)
Storage: -30? C to 70? C (-22? to +158? F)
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HUMIDITY
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90% RH @ 40°C (104°F) non-condensing
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ALTITUDE
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2,000 m (6,562 ft) to full safety specifications
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CABLES
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15 ft (4.6m) single phase cable set, 15 ft (4.6m) 3-phase cable set, 25 ft (7.6m) extension cable set, USB cable, power & ground cables, cable bag
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OPTIONS
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shipping case, transformer load tap-changer remote control device, 30' (9.14 m) single and 3-phase H and X leads
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WARRANTY
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One year on parts and labor
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Specifications are valid at nominal voltage and ambient temperature of +25?C (+77?F).
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