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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.

DTR® Model 8510 – Cat. #2136.50 : Includes soft carrying case, NiMH batteries (installed), 115V power cord, set of (2) 15 ft leads, set of (2) alligator clips (red, black), 10 ft USB cable, external battery charger (90-264Vac, 50/60Hz) and USB drive with DataView® software and a user manual.

VT/PT Ratio RangeAuto-Ranging:  0.8000:1 to 8000.0:1
VT/PT Accuracy0.8000 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 RangeAuto-Ranging: 0.8000 to 1000.0
CT Accuracy±0.5% of Reading
Excitation SignalVT/PT Mode: 32Vrms max
CT Mode: Auto Level 0 to 1A, 0.1 to 4.5Vrms
Excitation Current DisplayRange: 0 to 1000mA
Accuracy: ±(2% of Reading +2mA)
Excitation Frequency70Hz
DisplayLCD 16 character, 2 line, large format, LED backlight, day/night visible
Languages SupportedEnglish, Spanish, French, Italian, German, Portuguese
CommunicationOptically isolated USB 2.0
Data StorageUp to 10,000 complete measurements
Power SourceTwo rechargeable 12V NiMH batteries (included)
Battery LifeUp to 10 hours of continuous operation
Low Battery IndicationLED and LCD
External Charger90 to 240V, 50/60Hz (smart charger)
Charging Time<4 hours
Measurement MethodIn accordance with ANSI/IEEE Std. C57.12.90-2006
SoftwareDataView analysis software included
Dimensions10.70 x 9.76 x 5.12” (272 x 248 x 130mm)
Weight8.1 lbs (3.7kg)
Operation Temperature14° to 122°F (-10° to 50°C)
Storage Temperature-4° to 140°F (-20° to 60°C)
Index of ProtectionIP40 (lid open), IP53 (lid closed)
Double InsulatedYes
CE ApprovedYes
Safety ComplianceIEC 61010-1 (1995-A2) 50V CAT IV Pollution 2