High-voltage test transformer is referred to as a test transformer. Test transformers are generally step-up transformers. This type of test transformer uses the power frequency high voltage induced on its secondary side to conduct insulation performance tests on various electrical products and insulating materials. The test transformer is an indispensable electrical equipment for withstand voltage testing in the repair and manufacturing of motors, transformers, and electrical appliances. Test transformers are mainly used for power frequency withstand voltage tests, partial discharge measurements, and thermal stability tests of insulating media for electrical products; for medium and high-frequency electrical equipment, test transformers with special frequencies can also be used for withstand voltage tests and measurement of related electrical parameters.
The high-voltage test transformer is a new type of high-voltage testing equipment. This series of products adopts a single-frame core-type iron core structure, with the primary winding and high-voltage winding coaxially wound on the iron core, thereby reducing leakage flux and increasing coupling between windings. The overall structure of the product is compact, with strong versatility, and is easy to use and carry. It is suitable for on-site testing of the insulation performance of various high-voltage electrical equipment in power systems and by power users, and is an essential test instrument for power equipment testing and preventive tests.
The high-voltage test transformer is made of high-quality cold-rolled grain-oriented silicon steel sheets, with steel as the clamping parts. The high-voltage coil is a cylindrical multi-layer tower type, wound with high-quality polyester enameled wire and high withstand voltage insulating materials. The low-voltage coil is on the outside, and the instrument coil is an independent winding, generally 100V. The shell is octagonal, and test transformers above 10KVA are equipped with movable iron wheels. It has the characteristics of light weight, small size, easy movement, and superior performance. The product is suitable for insulation strength tests under power frequency or DC high voltage on various high and low voltage electrical equipment, electrical components, and insulating materials. It is small in size, light in weight, easy to carry, and has no oil seepage. It is divided into four types: AC/DC, AC/DC series excitation, AC, and AC series excitation.
The high-voltage test transformer has many characteristics, such as light weight, small size, extremely strong versatility, complete functions, and compact structure. It is very convenient to use and is indispensable and plays an important role in the power system. The transformer is suitable for industrial and mining enterprises, power systems, and scientific research departments, facilitating insulation tests under DC high voltage or power frequency on electrical components, high-voltage equipment, and insulating materials. In high-voltage testing, the transformer is one of the important test equipment.
