Transformer Turns Ratio Tester DV Power TRT03A

The DV Power TRT03A is a Transformer Turns Ratio Tester that is commonly used for measuring the turn ratio of transformers. The turns ratio test is a crucial maintenance test for power transformers. The TRT03A is designed to provide accurate turns ratio measurements with a precision of 0.05%.
The TRT03A is part of the TRT Standard Series and is a fully automatic test set. It is specifically designed for conducting turns ratio, phase shift, and excitation current measurements. With its advanced features and capabilities, the TRT03A enables efficient and reliable testing of transformers.
The DV Power TRT03A is indeed a specialized device that provides accurate and automated measurement of transformer turn ratios. It is commonly used during various stages, including manufacturing, commissioning, and testing of different types of transformers:

• Power transformer 
• Distribution transformer 
• Instrument transformer 

How To Use TRT03A? 

The TRT03A is primarily designed for measuring of transformer turn ratio, automatically apply and the injection by applying voltages across HV windings, measuring voltages across the unloaded transformer winding and then displaying the ratio of these voltages.
The Transformer Turns Ratio Tester TRT03A is a precise measuring tool that generates a true single AC 50/60 Hz voltage.

TRT03A Transformer Turns Ratio Tester Design 

The TRT03A is a reliable test device that can store up to 10 000 measurements in internal memory. A built-in thermal printer is available as an option. Free DV-TR software is included in the purchasing price and communicates with the TRT03A winding-ohmmeter via USB or RS232 interface. It allows you to run the test remotely from a PC, as well as to download test results, analyze them, and generate fully configurable test reports. As a digital turns ratio meter is the ideal choice for industries that require precise and consistent measurement.

Connecting TRT03A to a Test Object 

TRT is programmed to automatically test turns ratio, phase shift, and excitation current of power and distribution transformer types defined by CEI/IEC, IEEE, and ANSI standards. Using two sets of four cables, all bushings of the primary and the secondary sides are connected only once.
The TRT03A device implements Kelvin's (four-point) measurement principle for its connection principle. This principle is designed to enhance the accuracy of measurements by employing separate terminals for voltage generation and voltage measurement. 
In this configuration, one side of the measuring clamps is connected to the "Voltage Generate Sense" terminals, while the other side is connected to the "Voltage Measurement Sense" terminals. By doing so, the impact of voltage drops in the voltage generating cables is effectively eliminated from the turn’s ratio measurement.
This setup ensures precise and reliable voltage readings by minimizing any additional voltage drops that could occur in the measurement setup.