What is a transformer bushing？

The transformer sleeve is the main insulating device outside the transformer box. The lead line of the transformer winding must pass through the insulating sleeve, and the lead line and the lead line are insulated between the transformer housing, while the function of the fixed lead. Different voltage levels, the insulating sleeve is in the form of a pure porcelain sleeve, a filling sleeve and a capacitor sleeve. Pure porcelain sleeve is used in 10kV and below transformers, which is in a porcelain sleeve, a conductive copper rod in a porcelain sleeve, an air insulation in the porcelain sleeve; a filler sleeve is used in a 35kV stage transformer, which is filled in porcelain sleeve Wear a conductive copper rod in the porcelain sleeve, copper outsourcing insulation paper; a capacitive sleeve is used in a high voltage transformer above 100kV, from the main insulating capacitance core, an outer insulating upper and lower porcelain, connecting sleeve, oil pillow , Spring assembly, base, homogeneous ball, measuring terminal, terminal block, rubber washer, insulating oil, etc.