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The DTR® Model 8510 is a portable digital transformer ratiometer designed for on-site testing of power, potential and current transformers. When connected to a non-energized transformer, the DTR® Model 8510 accurately measures primary to secondary turns ratio, while simultaneously displaying polarity and excitation current. The DTR® is fully automatic and uses an ANSI/IEEE compliant test method. No user calibration, range selection, hand cranking or tedious balancing is required. At each measurement, the DTR® automatically self-calibrates and checks for open windings/connections/circuit breakers, short circuits (excess excitation current), incorrect test lead placement, and reverse polarity. Measurements are displayed quickly and accurately.
VT/PT Ratio Range
Auto-Ranging: 0.8000:1 to 8000.0:1
VT/PT Accuracy
0.8000 to 9.9999: ±0.2% of Reading 10.000 to 999.99: ±0.1% of Reading 1000.0 to 4999.9: ±0.2% of Reading 5000.0 to 8.000.0: ±0.25% of Reading
CT Ratio Range
Auto-Ranging: 0.8000 to 1000.0
CT Accuracy
±0.5% of Reading
Excitation Signal
VT/PT Mode: 32Vrms max CT Mode: Auto Level 0 to 1A, 0.1 to 4.5Vrms
Excitation Current Display
Range: 0 to 1000mA Accuracy: ±(2% of Reading +2mA)
Excitation Frequency
70Hz
Display
LCD 16 character, 2 line, large format, LED backlight, day/night visible