Precision, Accuracy, and Confidence in Every Test
The DTR® 8511 is the next-generation digital transformer ratiometer, engineered to make transformer testing fast,, and safer 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. Not wasted time.
The DTR® 8511 was built for fast, 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 firewall repeatable, results.
- Automatic Testing – Fully automatic cycles check for lead reversal and open circuits—no manual balance 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 V DCDC supply.
- 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 USB isolated interface to manage results, configure nameplate values, generate professional reports included with the DataView ®® software and DTR Control Panel.

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