Digital ratiometer DTR 8510

for transformers

The DTR® Model 8510 is an easy-to-use portable digital transformer turns 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. Specifications 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 8000.0: ±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 Languages Supported - English, Spanish, French, Italian, German, Portuguese Communication - Optically isolated USB 2.0 Data Storage - Up to 10,000 complete measurements Power Source - Two rechargeable 12V NiMH batteries (included) Battery Life - Up to 10 hours of continuous operation Low Battery Indication - LED and LCD