Protective disconnection device for self-healing dielectric power factor correction capacitor, has separate portion of housing into which disconnection-activating membrane can expand

摘要

A rigid external casing (15) containing a polymerized resin (16) encapsulates the capacitor winding (1), a channel (17) being provided to allow gas to pass between the winding and a sealed deformable membrane (13), arranged to break the connection to the capacitor in the event of excess pressure. In the vicinity of the membrane an extension (26) of the rigid housing defines a limit of an expansion region into which the deformable membrane may move.