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How to Test Transformer Turns Ratio?

May 21 | COMPANY NEWS, NEWS

Power System Reliability Through Precision Testing

The Role of Monitoring and Maintenance Tools from Baoding Push Electric

Why Turns Ratio Testing Matters

The verification of transformer turns ratio (TTR) is a critical step in the testing and maintenance of high-voltage equipment. A false turns ratio may indicate serious problems, such as shorted windings, open circuits, or incorrect tap changer settings—all of which can affect voltage regulation and lead to transformer failure.

At Baoding Push Electric Manufacturing Co., Ltd., we specialize in the development and production of high-voltage testing equipment that helps ensure electrical safety and operational efficiency.

What Is Transformer Turns Ratio (TTR)?

The turn ratio is the relationship between the number of windings in the primary coil and the secondary coil of a transformer. Any deviation from the expected ratio can result in:

  • Voltage irregularities
  • Transformer overheating
  • Reduced system stability

Modern testers determine TTR by applying a low-voltage AC signal to one winding and digitally calculating the voltage ratio across the other winding.

How TTR Testing Achieves Accuracy

To obtain reliable results in the field or on the factory floor, professionals rely on testers with:

  • Automatic three-phase ratio measurement
  • High-Frequency Test Signal Injection (HFTSI) for noise immunity
  • Digital error compensation based on phase angle and impedance differences
  • Multi-position tap changer support for full-range analysis

Our advanced systems are designed for high-precision testing even in high-energy substations or complex manufacturing environments.

Complementary Tools for Full Transformer Evaluation

A full transformer health assessment requires more than just TTR testing. Here are additional tools used by field engineers for deeper insight:

80kV / 60kV / 30kV VLF Hipot Tester

Used to test the dielectric strength of transformer insulation and cables. VLF (Very Low Frequency) testing ensures safety by operating at low power while still validating high-voltage tolerance.

China Hydrogen Generator Gas Chromatography Test Kit

This test kit analyzes hydrogen and other dissolved gases in transformer oil—critical for early detection of internal arcing or overheating.

PS-SD01 Oil Color Tester

Used for visual and digital analysis of insulating oil color, helping identify oxidation, contamination, or aging of the oil—all of which are key indicators of internal transformer deterioration.

These tools collectively provide a comprehensive picture of:

  • Winding insulation status
  • Oil degradation
  • Gas content linked to faults

Why Choose Baoding Push Electric?

👉 Visit www.oil-tester.com to explore our full product line and request a quote for your transformer diagnostics equipment today.