High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Polyphase
Reexamination Certificate
2000-02-15
2001-05-15
Donovan, Lincoln (Department: 2832)
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Polyphase
C218S155000, C218S140000
Reexamination Certificate
active
06232571
ABSTRACT:
The invention relates to a medium-voltage circuit-breaker and disconnector module, in particular for outdoor installation, and to a corresponding power distribution substation.
BACKGROUND OF THE INVENTION
Air-insulated medium-voltage circuit-breaker modules for installation outdoors are commonly made up of circuit-breaker boxes for installation indoors that are placed inside a protective metal enclosure and which are connected to electricity lines via air/air type current feedthroughs mounted in openings in a roof-forming wall of the enclosure. Such outdoor circuit-breaker modules are generally associated with disconnectors that are situated outside the enclosures and which enable the boxes to be isolated to allow access to the components thereof for maintenance or replacement purposes, or indeed to isolate the incoming and outgoing feeders connected thereto. Such combinations of equipment are relatively large and complex.
Document FR-A-2 683 940 describes an embodiment of a medium-voltage circuit-breaker for outdoor installation which also constitutes its own disconnector. Disconnection is implemented by tilting its poles between a position in which the poles are electrically connected to connection feedthroughs of the circuit-breaker, and a position that is situated angularly at 90° therefrom and in which the poles are isolated from the feedthroughs. That circuit-breaker is incorporated in a module having a circuit-breaker support drawer suitable for being extracted in part in order to enable operating personnel to take action thereon for maintenance and/or replacement purposes. More specifically, provision is made to connect the circuit-breaker and disconnector unit to live bare conductors which extend laterally as far as the circuit-breaker. This implies that the module must be installed high up, on a pylon, to comply with safety standards. Such a solution presents serious drawbacks in terms of controlling the circuit-breaker and of giving operating personnel access to the various components situated inside the module that includes the circuit-breaker.
OBJECTS AND SUMMARY OF THE INVENTION
The invention thus proposes a medium-voltage circuit-breaker and disconnector module, in particular for installation outdoors and at ground level, and a corresponding power distribution substation.
The medium-voltage circuit-breaker and disconnector module includes a conventional multipole circuit-breaker and disconnector unit in which disconnection is performed by tilting the set of poles about a common axis from an in-service position in which each pole is connected to corresponding fixed connection pieces of the module via complementary connection pieces fixed to its own ends to a disconnection position in which the complementary connection pieces carried by the poles are disconnected from the fixed connection pieces following pivoting of a beam on which the poles are fixed, said module also having a metal enclosure in which the circuit-breaker is housed, carried on a movable carriage.
The invention also proposes a medium-voltage power distribution substation of the one-and-a-half breaker type for installation outdoors or indoors.
REFERENCES:
patent: 2374702 (1945-05-01), Reilly
patent: 3932720 (1976-01-01), Gaigg et al.
patent: 4884166 (1989-11-01), Thuries et al.
patent: 5321221 (1994-06-01), Rozier
patent: 6025983 (2000-02-01), Uchida et al.
patent: 2 683 940 A1 (1993-05-01), None
patent: 2 689 305 A1 (1993-10-01), None
patent: 2 725 843 A1 (1996-04-01), None
Attack Said
Starck Thierry
Alstom
Donovan Lincoln
Nguyen Tuyen T.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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