A New Separable 170 kV Outdoor Bushing System Creates a Multi-Purpose Transformer or Switchgear

摘要

High voltage bushings are commonly used to transmit electric energy from the inner part of a device through a grounded barrier, as known from transformers or GIS. The traditional bushings are stationary mounted and it's impossible to disassemlbe them without opening the gas or oil compartment. The aim of this new development is a simple, rapid and dry installation of the bushing at the destination of use. It bases on the successfully approved Pfisterer CONNEX Termination System and enables to decide on site whether a cable or a bare line connection is installed. Costly gas or oil processes are not required. A sophisticated design of the used materials regarding their different permittivities together with the field grading components result in homogenous field distribution.