Short-Circuit Impedance Tester

The transformer short-circuit impedance tester uses a popular ARM processor with a 168MHz main frequency and 128MB of memory, which can be expanded with a 4GB memory card. The instrument features a 7-inch high-definition color touch screen and employs the EmWin display interface, making the user interface intuitive and easy to operate. It can be fully operated via the touch screen, eliminating the need for a keyboard.

The instrument supports a database and allows data export via a USB flash drive or transmission to a background computer through a data cable.

The circuit design of the instrument is both elegant and innovative, providing superior performance, powerful functionality, compact size, and lightweight construction. In addition to testing the impedance load parameters of the transformer, the instrument can also measure harmonic content and waveforms on-site. With its user-friendly operation, the instrument offers a reliable foundation for transformer parameter analysis.  

The Transformer LV Short-Circuit Impedance Tester is designed for use in LV load impedance testing during delivery, overhaul, trial tests, and handover tests of power transformers (both single-phase and three-phase).

It measures the short-circuit impedance (%) of the power voltage on-site and compares it with the value indicated on the nameplate or the factory default. This helps identify any defects, such as winding displacement or deformation, which may result from major failures during transportation, installation, or operation after the delivery test. (A significant change in short-circuit impedance is considered if it exceeds ±3%, as specified in the China International Conference on Electricity Distribution 2000 (“CICED 2000”)).

The Transformer LV Short-Circuit Impedance Tester does not require an external voltage regulator and uses a primary connection mode. Once the parameters are entered, the tester automatically begins the three-phase testing, calculates the impedance error percentage, and provides intuitive results. This is a rapid and efficient tester for detecting winding deformation in transformers on-site.