The high-voltage test transformer, also known as the test transformer. The ultra-light test transformer is a power testing instrument that has been verified and approved by the national power department in accordance with the "National Standard for Test Transformers" and the industry standard "JB/T9641-1999".

　　As the main unit of high-voltage testing equipment, the high-voltage test transformer, combined with control systems, voltage regulators, and protection devices, is mainly applicable for insulation strength and leakage tests under power frequency or DC high voltage on various electrical equipment, electrical components, and insulating materials in power systems, industrial and mining enterprises, and scientific research departments. It is used to assess the insulation level of the test object, and can promptly detect local defects and measure the ability of the test object to withstand internal and external overvoltages.

　　The high-voltage test transformer adopts the fifth-generation IPM dedicated module, with four sets of data displayed on the same screen: voltage, current, protection current, and time setting. It uses fully digital voltage boosting, abandoning the traditional voltage regulator boosting method. Current, voltage, and protection current can be set directly with buttons, which is convenient and quick. A single button can easily switch between AC and DC display modes for voltage. The high-voltage test transformer has a safe grounding protection function that automatically detects whether the ground wire is securely connected, and has audible and visual alarm functions, effectively ensuring personal safety.

　　The high-voltage test transformer has fully computer-controlled time, with stop conditions that can be set arbitrarily, and a settable time range from 1 second to 100 minutes. It is small in size and light in weight, being dozens of times lighter than traditional equipment of the same capacity. The high-voltage winding adopts a multi-layer pagoda-shaped trapezoidal structure, and the low-voltage winding is a cylindrical structure, with the shielding and iron core grounded together. The bottom of the oil tank of the high-voltage test transformer is equipped with movable casters (no casters for 5kVA and below), allowing it to be moved freely on the ground, which is convenient for laboratory and field operations. It is an indoor device, with the iron core made of cold-rolled oriented silicon steel sheets, structured as a core type, placed horizontally, with the low-voltage winding, measurement winding, shielding, and high-voltage winding concentrically mounted on the core column.