H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/228
H01H 33/64 (2006.01)
Patent
CA 1077548
IMPROVED LIVE-TANK MODULAR-CONSTRUCTION HIGH-VOLTAGE COMPRESSED-GAS CIRCUIT-BREAKER ARRANGEMENTS ABSTRACT OF THE DISCLOSURE An improved live-tank modular-construction circuit- breaker arrangement of the rotating-contact-arm type is provided, in which only three breaks are adequate and suffice for interrupting very high voltages, say of the order of 550 kV, or 362 kV, for example. The metallic interrupting "live" heads are of modular standard construction, and utilize the rotating-contact-arm type of circuit-breaker assemblage. The proposed breaker design of the present inven- tion allows interruption to take place with an odd number of breaks in series for "live-tank" breakers. This results in eliminating three extra-high-voltage terminal-bushings, three capacitor dividers, three interrupting breaks, and three closing resistors in the opening or closing operations for preventing switching surges (overvoltages), which would otherwise be required. Cost reduction has thereby been tremendously reduced by the elimination of the aforesaid major circuit-breaker components. In one modification of the invention, one of the "live" metallic interrupting heads encloses only a single break, whereas the other interrupting head may utilize an interrupting "live" head construction of the usual type, involving closing resistances inserted only during the clo- sing operation, or, alternatively, the other, or "second" series interrupting head may use only one closing resistance with the accompanying break within the interrupting head -1- having only a pair of main contacts, with the elimination in connection with this particular break of a shunting in- rush resistance and its associated insertion-resistance separable contacts. The aforesaid two-unit construction enables the use of the usual circuit-breaker operating mechanism and mechanical linkage components involving standardized parts and thereby permitting ready assembly.
275036
Perulfi John R.
Westinghouse Electric Corporation
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