High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Auxiliary shunt
Patent
1998-02-12
1999-05-18
Donovan, Lincoln
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Auxiliary shunt
218 7, 218 78, 218154, H01H33/12;33/66;9/38
Patent
active
059052422
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a high voltage hybrid circuit breaker comprising in each pole: switch supporting the dU/dt of the transient recovery voltage, contacts between open and closed positions, housing being subdivided into a first compartment enclosed by an insulator for housing the primary contacts of the primary circuit and the gas circuit breaker, and an adjacent second compartment housing the switch, said second compartment being formed by a metallic enclosure made of conducting material.
The breaking device according to the document DE-A-4,405,206 relates to an SF6 gas switch contained in an insulating enclosure and connected in series with a vacuum switch, which is arranged in a metallic housing. Each switch has its own actuating means, those associated to the vacuum switch operating only when the short-circuit current exceeds a preset threshold. The vacuum switch is formed by several vacuum cartridges connected in parallel. The operating state of these cartridges cannot easily be checked by the user.
According to another known device, the gas circuit breaker and vacuum cartridge assembly is housed in a common enclosure, and two operating mechanisms are required to actuate the arcing contacts. Such a device is complicated and costly.
The object of the invention is to achieve a high voltage hybrid circuit breaker of simple and inexpensive design.
The circuit breaker according to the invention is characterized in that the movable arcing contact of the gas circuit breaker is actuated with the movable primary contact by a primary control rod connected to a common mechanism, the displacement movement of the movable arcing contact of the switch being derived from the translational movement of the primary rod through an intermediate transmission lever housed in the second compartment.
As the switch does not have to withstand the power system voltage, it can be inserted in a compartment not having an insulator. The operating means of the switch are housed in this compartment. The switch can be formed either by a vacuum cartridge, or by a rotating arc breaking device, or by a power semi-conductor circuit.
The gas circuit breaker can be of the self-extinguishing expansion or piston gas-blast type.
Other advantages and features will become more clearly apparent from the following description of an embodiment of the invention given as a non-restrictive example only and represented in accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of the hybrid circuit breaker according to the invention;
FIG. 2 shows the wiring diagram of the hybrid circuit breaker;
FIGS. 3A to 3E represent the diagrams of the current and voltage versus time.
In FIG. 1, a pole of a high voltage, notably more than 100 kV, hybrid circuit breaker 10 comprises a system of multiple contacts housed in a first compartment 12 and an adjacent second compartment 14, the whole assembly being supported by a hollow supporting insulator 16.
The first compartment 12 houses a primary circuit 18 supplied by a pair of connection terminals 20, 22, and comprising a movable primary contact 24 in the form of a bridge cooperating with stationary primary contacts 26, 28 in electrical connection respectively with the terminals 20, 22. The primary circuit 18 coaxially surrounds a gas circuit breaker 30 comprising a first metallic chamber 31 housing a first stationary arcing contact 32, and a tubular second arcing contact 34 arranged at the end of a conducting tube 36. The other end of the tube 36 is equipped with a drive spur 38 cooperating with a transmission block 40 to move the movable second arcing contact 34 in translation between a closed position and an open position.
The inside of the chamber 31 communicates with the remaining volume of the first compartment 12 via the tube 36 and radial openings 42 of the block 40. A spring 44 fitted between the block 40 and the spur 38 of the tube 36 urges the second arcing contact 34 into engagement against the first arcing contact 32.
The first compartment 12 is bounded by an insulator 46 made of
REFERENCES:
patent: 3571543 (1971-03-01), Perkins et al.
patent: 3671696 (1972-06-01), Brunner
patent: 4087664 (1978-05-01), Weston
patent: 4458119 (1984-07-01), Hashimoto et al.
patent: 4538039 (1985-08-01), Gotoh et al.
patent: 4550234 (1985-10-01), Stenemer
patent: 5079392 (1992-01-01), Tsukushi et al.
patent: 5155315 (1992-10-01), Malkin et al.
Bernard Georges
Chevrier Pierre
Faye Jean-Claude
Leclercq Pierre
Maftoul Joseph
Donovan Lincoln
Schneider Electric SA
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