масло

衬套是一种绝缘设备，将活导体带入电气设备或通过墙壁。前者称为电衬套，后者称为墙壁衬套。套管结构通常由三个部分组成: дирижер (направляющая штанга),insulator and metal flange.Conductors pass through the shaft of cylindrical insulators,and metal ring flanges are mounted on the outside of the insulators for grounding.The shell is an insulated structure with a strong vertical electric field component.The electric field at the metal flange is very strong,which is easy to produce corona discharge and slip flash discharge along the dielectric [...]