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TheDTR®8511is the next-generation digital transformer ratiometer, engineered to make transformer testing faster, safer, and more reliable than ever. Building on the proven performance of the DTR®8510, this enhanced model introduces modern upgrades for the field—combining rugged portability with advanced measurement technology.
Designed for Field Technicians
No hand cranking. No calibration. No wasted time.
The DTR®8511 was built forfast, accurate, and hassle-free testing of transformers (power, VT/PTs, and CTs). With its brighter display, ergonomic design, and built-in safety checks, you’ll have confidence in every result.
Why Choose the DTR®8511?
Wide Ratio Range- Accurately measure transformer ratios up to 8000:1 for VT/PTs and 1000:1 for CTs.
High Precision- Advanced low-voltage step-down technology ensures repeatable, reliable results.
Automatic Testing- Fully automatic cycles check for lead reversal and open circuits—no manual balancing required.
Built-In Continuity & Deviation Checks- Instantly compare measured values to stored nameplate data for clear pass/fail results.
Rugged & Field-Ready- Lightweight IP53-rated design with a bright backlit display and oversized test button for easy use—even with gloves.
Flexible Power Options- Operates on rechargeable NiMH batteries, USB-C, or 12 VDCsupply.
Large Storage Capacity- Save up to 9,801 test results for recall and reporting.
Seamless Data Management & Connectivity- Connect directly to your PC via the isolated USB interface to manage results, configure nameplate values, and generate professional reports with the includedDataView®softwareandDTR®Control Panel.
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
