Patent ID: 7203053

Claim:
A capacitor providing a plurality of selectable capacitance values, the capacitor comprising: A) a wound cylindrical capacitive element having at least four concentrically wound capacitor sections each having a capacitance value, the capacitor sections each having a respective section element terminal at a first end of the capacitive element and the capacitor sections having a common element terminal at a second end of the capacitive element; B) a case receiving the capacitive element, the case having an open end; C) an insulating fluid in said case at least partially surrounding the capacitive element; D) a pressure interrupter cover assembly sealingly secured to the open end of case and closing it, the pressure interrupter cover assembly including a deformable cover having a common cover terminal and a plurality of section cover terminals mounted thereon at spaced apart locations; and E) a conductor frangibly connecting the common element terminal of the capacitive element to the common cover terminal and conductors respectively frangibly connecting the capacitor section terminals to the section cover terminals, wherein the capacitor may be connected to provide selected capacitance values in an electric circuit by attaching selected ones of the common cover terminal and capacitor section cover terminals to conductors of the electrical circuit, and outward deformation of the deformable cover caused by failure of the capacitor element breaks at least some of the frangible connections sufficient to disconnect the capacitive element from an electric circuit in which it is connected.