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Transformer Ratiometers

State-of-the-art transformer testing. AEMC portable digital transformer ratiometers detect open windings/connections/circuit breakers, short circuits, incorrect test lead placement, and reverse polarity.

Transformer Ratiometers

Why Choose AEMC Digital Transformer Ratiometers?

AEMC® portable digital transformer ratiometers (DTR®) are designed with safety in mind for on-site testing of power transformers, VT/PTs, and current transformers CT turn ratios with easy setup. No calibration or balancing required.

  • Injects into primary, read the secondary – Safer for the operator
  • Stores your 10 most common transformer nameplate values – saves time and eliminates errors in testing
  • Adjustable display contrast and backlighting - provides clear reading in all lighting conditions
  • Polarized H and X input cable connectors – eliminates errors in set up
  • Intelligent battery charging – prevents over charging, extends battery life

Quick and Accurate Measurements

When connected to a non-energized transformer, AEMC Transformer Ratiometers accurately measure primary to secondary turns ratio, while simultaneously displaying polarity, excitation current and % nameplate deviation.

Automatic Measurements

No user calibration, range selection, hand cranking, or tedious balancing is required.

At each measurement, our transformer ratiometers automatically self-calibrate and check for open windings/connections/circuit breakers, short circuits (excess excitation current), incorrect test lead placement, and reverse polarity.

Key Features (model 8510)

  • Ratio test results in less than 7 seconds)
  • Smart/fast battery charger with universal input voltage (100-240V, 50-60Hz) charges batteries in less than 4 hours
  • Display warns of incorrect lead connection, reverse polarity, open and short circuits
  • Easy connection and test setup; no calibration or balancing required
  • Large dual display with adjustable contrast ensures clearer visibility in any lighting
  • Filter selection to improve test results in electrically noisy environments
  • Stores up to 10,000 test results in internal memory automatically or by user selection
  • Includes DataView® software for instrument configuration, data storage, analysis, and report generation

Key Features (model 8505)

  • Verifies transformer winding continuity without requiring a full transformer ratio test
  • Checks coil continuity on single- and three- phase transformers
  • Detects open or shorted coils and capacitors
  • Detects switch open and closed positions
  • Automatically identifies device as a transformer or capacitor
  • Single button operation
  • Bright LED indicators and buzzer for T and C
  • Multi-frequency source signals improve test reliability and accuracy
  • Microprocessor based design for control, stability, and repeatability
  • Built-in self-test inductance and capacitance

Applications

  • Power Transformers
  • Potential Transformers
  • Current Transformers

Expert Tech Support

AEMC® provides complete technical support through our technical hot line 800-945-2362 (ext.351), speak directly to one of our tech support team members today. Or e-mail your questions to our tech team. techsupport@aemc.com

Excellent Customer Service

Our knowledgeable and friendly service team provides the best support in the industry. We seek to understand your inquiry or feedback in a respectful and responsive way. Our goal at AEMC Instruments is to surpass your expectations.

Speak directly to one of our customer care team members today at 800-945-2362 (Ext. 361). Or e-mail your questions customerservice@aemc.com

Request a Demo

Have questions on how to use AEMC® Power Analyzers and Energy Loggers? We're happy to provide a demonstration with our technical experts. Contact us at (800) 343-1391 or email us at sales@aemc.com

  • Digital Transformer Ratiometer DTR® Model 8510

    Cat. #2136.50
    Primary to secondary turns ratio, Polarity, Excitation current, Automatic self-calibration
    Digital transformer ratiometer for on-site testing of power, potential, and current transformers. Measures primary to secondary turns ratio, polarity, and excitation current. Automatically self-calibrates and checks for open windings/connections/circuit breakers, short circuits (excess excitation current), incorrect test lead placement, and reverse polarity.

  • Quick Tester Model 8505

    Cat. #2136.51
    Quick integrity tests on transformers/capacitors, Audible and visible indication
    Hand-held instrument for performing quick, basic integrity tests on transformers and capacitors. Verifies transformer winding continuity without requiring full transformer ratio test. Simple, single-button operation with built-in fuse protection.

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