Abstract: A circuit interrupter uses a dielectric liquid such as sulphur hexachloride to extinguish arcs in an interrupter. The liquid is injected at a relatively high pressure by a pump piston with a relatively high mass and an accumulator acts as a pressure fly wheel to effectively reduce high pressure maximums and increase low pressure minimums because of the much lower mass of the accumulator piston. In addition, a double fluid flow interrupter is provided.

Abstract: A magnetizing current switch particularly adaptable for use in gas insulated substations comprising a sealed housing including two spaced-apart electrical conductors and a movable contact for electrically connecting or disconnecting the electrical conductors. A rotatable drive shaft is coupled to drive means, which translate the rotation of the drive shaft to a generally straight-line motion, and the straight-line motion moves an insulating rod which is secured to the contact, thereby positioning the contact either in contact with both conductors, or spaced apart from at least one of them. The drive means includes a pair of support members and a pair of spaced-apart pivot links pivotally coupled to the support members. One of the pivot links is coupled to the drive shaft, and a link connector couples the pivot links together.