The non-partial discharge test transformer is used to provide non-partial discharge power frequency voltage test power supply for the test and research of UHV transmission and transformation equipment, including an insulating cylinder, which is equipped with a zigzag iron core, a coil is wound on the zigzag iron core, a chamfer is respectively set at the right angle outside the zigzag iron core, the coil is trapezoidal, and the iron core outside the coil is connected with two iron core shields, and the two iron core shields are respectively set at the left and right sides of the iron core, The coil jacket is equipped with an oil barrier. Through the above design, the invention significantly reduces the external insulation distance of the coil, thus reducing the partial discharge, and later ensuring that the partial discharge of the equipment is ≤ 5pC. The invention meets the power frequency withstand test and partial discharge measurement under power frequency voltage of UHV transmission and transformation equipment (mainly UHV GIS); At the same time, it shall meet the requirements for control, measurement interface and insulation level of switch joint test (power frequency+power frequency, impact+power frequency).
The upper and lower parts of the power frequency test transformer without partial discharge are respectively equipped with shielding covers, the outer part of the upper shielding cover of the cylinder is equipped with anti-corona cover, and the outer part of the cylinder is equipped with an insulating layer, which is made of RTV or PRTV materials. The utility model is equipped with an insulation layer composed of RTV and PRTV on the outside of the cylinder, which significantly reduces the insulation distance between the high voltage winding and the shell, greatly reduces its volume, facilitates outdoor carrying, and has good insulation performance, good hydrophobicity, chemical corrosion resistance, high hardness, wear resistance, impact resistance, and can adapt to outdoor and other harsh environments. The power frequency test transformer without partial discharge is mainly used to test the insulation level of various insulation materials, insulation structures and electrical products that can withstand power frequency voltage. It is also used as the power frequency test power supply without partial discharge for transformers, transformers, lightning arresters and other test objects. It is widely used in electrical manufacturing departments, power operation departments, scientific research institutions and colleges and universities.
