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TTRM-102 Three-Phase Transformer Turns Ratio Meter

The TTRM-102 is a high-accuracy, three-phase transformer turns ratio meter engineered for substation, workshop, and OEM testing of power and distribution transformers.
It performs simultaneous three-phase ratio measurement, along with phase displacement, vector group identification, polarity check, and excitation current evaluation.
Designed for fast field operation, it reduces testing time significantly on large multi-winding power transformers.

Key Features

  • Simultaneous three-phase TTR testing

  • Automatic vector group identification

  • Measures:

    • Turns Ratio

    • Phase Angle

    • Polarity

    • Excitation Current

  • Fully automatic connection & wiring error detection

  • Stable output with high noise immunity for live substations

  • Internal storage + USB export

  • LCD display with vector diagrams

  • Rugged field design

Technical Specifications

Parameter Specification
Ratio Range 0.8–20,000:1
Accuracy ±0.1%
Phase Angle Range 0–360°
Polarity Automatic
Test Voltage 8–100 V AC
Excitation Current Up to 5 A
Vector Group Support All standard IEC/ANSI groups
Display Backlit LCD
Communication USB
Power Supply 220 V AC
Weight ~12–14 kg

Standard Accessories

  • Three-phase HV lead set

  • Three-phase LV lead set

  • Ground cable

  • USB cable

  • Power cable

  • Transport case

  • Calibration certificate & user manual

Applications

  • Large power transformer ratio testing

  • Vector group verification & polarity check

  • Substation commissioning & diagnostics

  • Distribution transformer QA

  • OEM production lines

Optional Add-Ons

  • Extended HV/LV lead sets

  • Heavy-duty trolley case

  • Thermal printer

  • PC analysis & reporting software

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