Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electrical power distribution systems and devices
Patent
1992-07-02
1994-03-01
Tolin, Gerald P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electrical power distribution systems and devices
200148B, 200148F, H02B 104
Patent
active
052913694
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a three-pole, metal-encased, pressurized-gas-insulated, high-voltage switchgear with a single-pole, encapsulated, high-voltage power switch, with several breaker units lying next to each other, encapsulated with one pole in pressure chambers, which are each attached to a bearing component which is connected with a casing of the drive and of the switching mechanism, and the parallel axes of which run parallel to each other.
From FR 20 89 315, a multi-pole, encapsulated high-voltage switch with several breaker units lying next to one another in a shared casing is known, in which the switching mechanism is also housed in the same casing as the breaker units. The breaker units are each connected with the shared casing at their two ends, so that complicated disassembly is required for maintenance.
It is known, especially from CH-PS-558 094, to encapsulate the poles of the power switch of a three-pole, metal-encased, pressurized-gas-insulated, high-voltage switchgear in single-pole manner in each case, so that the breaker units of each pole are each housed in a separate pressure chamber, which is closed off by a cover on the frontal side.
From CH-PS-648 152 (cf. there particularly FIGS. 1 to 4), a multi-pole, metal-encased, pressurized-gas-insulated high-voltage switchgear of the type stated initially is known, in which the pressure chambers of the individual breaker units are each rigidly connected with the shared gear casing. There, the breaker units are each attached individually, in the individual pressure chambers.
SUMMARY OF THE INVENTION
The present invention is based on producing a mechanically more rigid connection of the breaker units relative to each other in a three-pole, metal-encased, pressurized-gas-insulated high-voltage switchgear.
To accomplish this task, it is provided, according to the present invention, in a pressurized-gas-insulated, high-voltage switchgear of the type described initially, that the breaker units are attached with bearing surfaces on the frontal side, on a shared gear casing which contains the switching mechanism of the drive, and can be moved relative to the pressure chambers, if necessary, the interior of which is divided into three sections, each assigned to a breaker unit, by two partitions, and the pressure chambers of the individual breaker units are connected with the gear casing via three flanges, each having an aperture, to form a gas seal, and that bearing rings for attachment of the breaker units to the gear casing are provided, which are connected with the gear casing via bridges which pass through the apertures.
With the bearing attachment of the breaker units to the shared gear casing and its strengthened structure due to the interior walls, it is ensured that the breaker units are attached in their position in such a way as to be easily adjustable and reliably attached. The gear casing has the form of a hollow carrier because of its essentially cuboid shape, which in itself already has great mechanical rigidity. The breaker units can be pulled out of the pressure chambers together with the gear casing, or pushed into them, for adjustment or maintenance work. This is advantageous, for example, also for the first assembly.
The region of each breaker unit which is filled with insulating gas extends beyond the pressure chambers to the gear casing in this design. In this way, no gas-sealed slide passage has to be provided at the coupling point between the pressure chambers and the gear casing, for the drive of the breaker unit. In addition, the flow-off space assigned to each breaker unit for the insulating gas is enlarged with this measure, so that pressure increases as the result of arc effects are attenuated by the enlargement of the volume.
The breaker units are attached to bearing rings, which in turn are held by the bridges attached on the inside of the gear casing. In this way, the breaker units can be attached to the gear casing without any attachment with the flanges The breaker units can thus be pul
REFERENCES:
patent: 3712969 (1973-01-01), Calvino
patent: 4429199 (1984-01-01), Pircher et al.
patent: 4527220 (1985-07-01), Boersma
patent: 4644442 (1987-02-01), Ponsioen et al.
patent: 4821143 (1989-04-01), Holmgren
Kelch Thomas
Meinherz Manfred
Siemens Aktiengesellschaft
Tolin Gerald P.
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