This instrument is primarily used to measure the transition waveforms, transition times, instantaneous transition resistance values, and three-phase synchronicity of transformer on-load tap changers.

This instrument is a multi-functional measuring device, equivalent to three conventional test instruments: an active transformer capacity tester, a transformer characteristic parameter tester, and a transformer winding material analyzer.

The Power Transformer On-Load Tap Changer Tester is a comprehensive measuring instrument designed for measuring and analyzing the electrical performance parameters of on-load tap changers in power transformers and special transformers within power systems.

The Comprehensive Tester for Transformer Winding Deformation incorporates two testing methodologies—the Frequency Response Method and the Low-Voltage Short-Circuit Impedance Method—to measure and diagnose the windings of large and medium-sized transformers. By comprehensively reflecting the winding characteristics of the transformer, it stands as the nation's first product to feature this industry-leading technology.