Abstract: An interrupt assembly for a primary circuit breaker of a distribution transformer includes an elongated housing that is divided into separate chambers for holding insulating fluid that extinguish an arc generated when a high-voltage electrical path between two breaker contacts is broken. The elongated housing includes openings that allow for the rapid exit of the expanding gases generated as a result of the arc. Consequently, the separately held insulating fluid in each chamber presents a strong dielectric property to the arc, causing it to extinguish rapidly.

Abstract: Protection of a cable, its termination and other apparatus from lightning strikes on an overhead line is provided by housing a surge arrestor and a cable termination, which are connected in parallel in a common housing, but as separate components not sharing the same axial line. With this configuration, minimal lead length is provided without sacrificing serviceability.