DE3214799A1 - Open-air switching installation - Google Patents

Description

OUTDOOR SWITCHGEAR

The invention relates to an outdoor switchgear of the In the preamble of claim 1 mentioned type. Such an outdoor switchgear is from the CH-PS 577 755 (largely identical in content to DE-OS 24 11 754). With this outdoor switchgear the encapsulated and pressurized gas insulated parts are limited to the busbar arrangement and to the the isolators and transducers assigned to its outlets, to which the bushing insulator is then connected for each phase connects. A piece of overhead line leads from the bushing insulator to a circuit breaker, which in turn is connected to a disconnector via another piece of overhead line. This type of construction requires installation despite the common encapsulation of the busbar arrangement, busbar disconnectors and instrument transformers a lot of space. In addition, this design also requires a not negligible maintenance effort, especially if compressed gas switches are provided as circuit breakers. In this case it's not just that Gas pressure in the encapsulated and pressurized gas-insulated parts of the switchgear monitor, but also those in the compressed gas switches. In addition, there is the material expense Support and carrying elements as well as connecting ladders.

3214793

In another previously known outdoor switchgear (CH-PS 473 494) is an oil-cooled transformer Via a coupling part with a horizontal compressed gas switch in an encapsulated design to form a unit tied together. The bushing insulator, which is used for outdoor construction, is mounted on the boiler of the gas pressure switch trained parts of the switchgear leads. This switchgear also claims by name because of the horizontal installation of the gas pressure switch, a considerable floor space, even more if you consider that busbar arrangements are to be provided for practically every switchgear, but that are neither mentioned nor represented in the last-mentioned CH-PS.

It is therefore a purpose of the invention to provide outdoor switchgear of the type mentioned to create the less with a minimum of space Maintenance expenses related to the control of the encapsulated, pressurized gas-insulated parts and the requires less material.

For this purpose, the proposed outdoor switchgear according to the invention is characterized in that that each of the power switching points, which are designed as compressed gas switches, is essentially in each case is arranged in one of the bushing insulators.

In this switchgear, for example, the bushing insulator and the Compressed gas switch through the upper half of an outdoor column switch be formed, which significantly reduces manufacturing and planning costs.

AT-

A switch boiler can also be saved on the encapsulated and pressurized gas-insulated part of the switchgear will.

The invention is explained in more detail below purely by way of example with reference to the drawing. It shows:

Fig. 1 is a schematic view of a

Part of a switchgear, and 10

Fig. 2 in a similar manner of representation

a variant.

In the switchgear 10 shown in FIG. 1, two busbar arrangements 11, 12 can be seen in an encapsulated, pressurized gas-insulated construction. _{Each of the conductors R 1} , S, T and R 2, S ”, T _{2 of} the two busbar arrangements 11, 12 running at right angles to the plane of the drawing runs in a grounded, metallic tube 13, 14, 15 filled with compressed gas, for example SFg or 13 ', 14', 15 '.

Branch nozzles 16, 17, 18 extend from the pipes 13, 14, 15 at points offset at right angles to the plane of the drawing, which in turn connect to corresponding T-pieces 19, 20, 21 starting from the pipes 13 ', 14', 15 * are flanged. In the branch connections 16 to 18 and the T-pieces 19 to 20 are of the corresponding conductors R ,, R _? ; S., S ₂ and T., T ₃ outgoing branch lines available, in each of which two isolators are switched on. This is shown schematically in the drawing for the conductors R., R ₃ , the branch conductor being denoted by 22 and the isolators by 23, 24. Between the dividers of each of the

32H799

Cf _

(ο

Branch conductor goes from an outgoing conductor 25, shown only schematically, which is connected to the relevant T-piece flanged, encapsulated and pressurized gas insulated current transformer 26 is performed. 5

An elbow 27 is flanged to the current transformer 26, through which the outgoing conductor 25 is continued. A further pipe section 28 is located on the bend 27 the lower connection end of the upper part of a conventional outdoor pressurized gas switch 29 in a columnar design (i.e. without post insulator). There is also an encapsulated one at this lower connection end and pressure-gas-insulated voltage wall eggs flanged into which the outgoing conductor 25 is inserted is. Likewise, at this lower connection end of the compressed gas switch 29 is designated by 31 Flanged drive mechanism (also in an encapsulated design) from which an actuating rod 32 proceeds from an insulating material. On this actuating rod 32 is the movable one indicated only schematically Contact set 33 of the gas pressure switch 29 coupled.

The fixed contact set 34 of the gas pressure switch 29 is inside the insulator 35 belonging to the gas pressure switch 29 is connected to the upper connection end 36. Directly on this upper connection end 36, the gear box 37 is shown in the disconnected position Scissor separator 38 mounted. From the gear box 37 one goes to a disconnector drive unit 39 leading drive rod 40 made of insulating material.

From what has been said, it can be seen that the insulator 35 is not only used as a bushing insulator between the in

32H799

ΑΤΙ-

encapsulated and pressurized gas-insulated construction and the open-air construction (scissor separator 38) Elements is used but at the same time the switching chamber of the gas pressure switch 29 encloses. 5

The embodiment of FIG. 2 corresponds with respect to of the components 11 to 36 largely those of FIG. 1. The difference is that the upper connection end 36 of the gas pressure switch 29 only has a counter contact 41 of a separately set up and a separator 43 with buckling cutting knife 44 supported on a post insulator 42. From the gear box

45 of the separator 43 is also a drive rod

46 made of an insulating material, which is coupled to a disconnector drive unit 47. Even with this one Embodiment come the two based on the isolator 35 Fig. 1 described functions.

Claims (1)

PATENT LAWYERS Djpl.-Ing. H. Leinweber na "-?" Dipl.-Ing. Heinz Zimmermann Dipl.-Ing. A. Gf. v. Wengersky Rosental 7 D-8000 Munich 2 2. Ascent (Kustermann-Passage) Telephone (089) 2603989 Telex 528191 lepatd Telegr.-Adr. Leinpat Munich ^don April 21, 1982 Ours; sign zsd / P 674 DE Sprecher & Schuh AG, 5001 Aarau / Switzerland Patent claims: 1. Outdoor switchgear with at least one compressed gas insulated and encapsulated busbar arrangement (11, 12) and with power switching points that can be coupled to them in phases (33, 34), to which separators (38) designed in an open-air design are connected, with encapsulated and compressed gas-insulated construction and the elements of the switchgear for each phase, which are designed in open-air construction a bushing insulator (35) is present, characterized in that that each of the power switching points (33, 34) designed as a gas pressure switch (29) is essentially in each case is arranged in one of the bushing insulators (35). 2. Switchgear according to claim 1, characterized in that the connected to the gas pressure switch (29) Isolators (38) are mounted on the bushing insulators (35) containing the gas pressure switch. ' η Χλ 1 3. Switchgear according to claim 1, characterized characterized in that the gas pressure switch (29) containing the Bushing insulators (35) a contact piece (41) of the isolators connected to the gas pressure switch 5 (43) is mounted.