EP 0158520 A3 19861112 - LOAD BREAK SWITCH WITH SAFETY MECHANISM
Title (en)
LOAD BREAK SWITCH WITH SAFETY MECHANISM
Publication
Application
Priority
US 59855884 A 19840409
Abstract (en)
[origin: EP0158520A2] A single-phase ground enclosed load break switch for distribution voltages has a hermetically sealed cylindrical metal housing (210) of from 2 to 6 inches diameter which contains an insulating gas under pressure. The switch has a movable contact assembly to contact a pair of opposed stationary coaxial conductors with the housing. A rocking bellows (266) at the fulcrum of a crank actuator (264) provides a compact hermetic seal for the actuator without excessive strain of the bellows. A safety interlock (302,310,260) with a visual indicator (318,320) locks the contact assembly in case of a loss of pressure. Excessive pressure in the switch causes the bellows (266) to be punctured with consequent locking of the contact assembly. The switch is small enough to be mounted directly on a transformer or placed into a cable, without the need for a separate enclosure.
IPC 1-7
IPC 8 full level
H01H 33/64 (2006.01); H01H 33/46 (2006.01); H01H 33/56 (2006.01)
CPC (source: EP)
H01H 33/563 (2013.01)
Citation (search report)
- [X] GB 967521 A 19640826 - WESTINGHOUSE ELECTRIC CORP
- [X] GB 1026435 A 19660420 - S & C ELECTRIC CO
- [X] US 3077527 A 19630212 - GOLDBACH WILLIAM R, et al
- [A] CH 372722 A 19631031 - CONTINENTAL ELEKTRO IND AG [DE]
- [A] GB 841341 A 19600713 - ASEA AB
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0158520 A2 19851016; EP 0158520 A3 19861112; AU 4095385 A 19851017; BR 8501630 A 19851203; CA 1253184 A 19890425; DK 153785 A 19851010; DK 153785 D0 19850403; ES 542026 A0 19860601; ES 8608225 A1 19860601; JP S60230324 A 19851115; NO 851407 L 19851010; ZA 852616 B 19861230
DOCDB simple family (application)
EP 85302397 A 19850404; AU 4095385 A 19850409; BR 8501630 A 19850408; CA 478589 A 19850404; DK 153785 A 19850403; ES 542026 A 19850408; JP 7634485 A 19850409; NO 851407 A 19850409; ZA 852616 A 19850409