Westinghouse Electric Corporation

Abb Power Td & Company

John R Perulfi

Joseph R Rostron

A circuit breaker utilizes a plurality of vacuum interrupters immersed in oil. A cross-bar with electrically conductive sections completes a series electrical circuit through the circuit breaker and actuates operating mechanisms, to close the contacts of the vacuum interrupters when in the raised position as the cross-bar is lowered, the contacts of the vacuum interrupters are opened by impact forces before isolation gaps which fill with oil are created in the series electrical circuit. Various arrangements of the vacuum interrupters are disclosed for uprating existing oil circuit breakers.

Multiple vacuum interrupter fluid insulated circuit breaker with

A current transformer characterized by a terminal bushing extending from a tank with a pair of spaced conductors extending through the bushing and into the tank and with the portions of the conductors in the tank being enclosed within tubular means. The assembly of the conductors, bushing, and tubular means being clamped together by resilient (spring) means for holding the conductors in tension and the bushing and tubular means in compression. The transformer also embodies two separate oil systems.

Current transformer

A generally cross-shaped, or 'T'-shaped circuit-interrupter assemblage is provided having three outwardly radiating supporting arms, or members, within each of which is disposed a puffer-type compressed-gas circuit-interrupting unit. Common contact-operating means are provided at the common point of intersection of the three arms, or legs, so that simultaneous operation of the three puffer-type interrupters is accomplished. The electrical circuit passes serially through each of the three puffer-interrupting structures to thereby provide a high-voltage circuit-interrupter adaptable for voltages of the order of 345 KV, for example. An additional feature of the present invention is the provision of a common rotatable operating disc having pivotally connected thereto, adjacent its outer periphery, floating-connecting link structure, each of the three floating links being pivotally connected to the respective movable contact-operating rod of each of the three puffer-type interrupting units. An additional operating, or 'pull' rod connected adjacent the periphery of the common rotatable operating disc acts as a common pull-rod extending to ground potential to thereby enable the operation of said disc at high voltage. An additional feature of the present invention is the provision of a closing resistance, when desired, for each of the three puffer-type circuit-interrupters. Still a further feature of the invention is the provision of two such cross-shaped, or 'T'-shaped interrupting structures for the provision of six serially-related breaks for extremely high voltages, such as 550 KV or 765 KV, for example.

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Monroeville, PA, United States of America

John R Perulfi