DE1615726A1 - Separating device for compressed gas insulated switchgear - Google Patents

Description

1615726 Mannheim, March 28, 1967

BROWN, BOVERI & CIE AG ^Pat * ^{Mx / Ro}

MANNHEIM Mp-No. 539/67

"Separating device for compressed gas-insulated switchgear"

The invention relates to a separating device with two electrically in series, forming a double separating section Isolation points for compressed gas-insulated switchgear, the encapsulation of which is composed of tubular sections.

When designing compressed gas-insulated switchgear, the main thing is that the system is easy to assemble and, with regard to maintenance, appropriate dismantling to be taken into account. To carry out maintenance work In order to avoid extensive breakdowns, if possible, only a small part of the entire system is temporarily shut down place. From this point of view, the separating devices of such a system are particularly important This is because maintenance can only be carried out when the Pressurized gas has been released. In connection with this, there is the question of partitioning, whereby one must not disregard that when the gas pressure drops, the insulation and thus the separation conditions change disadvantageously. In addition, the It is possible to earth the cable that has been disconnected from the system. So far, most of these have resulted from these requirements the use of unfavorable double bulkheads and cumbersome earthing devices.

The known arrangements are sometimes still too large, time-consuming in the case of maintenance or repair and therefore do not fulfill their purpose in the desired way (see Brown, Boveri Mitt. 196 | * _e He_ft 4/5 »ITZ-A 1965, Heft 7 and Siemens magazine 1966, issue 4) / " ^{: Λ} * ' ^Γ ~ - ^

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The invention is based on the problem of the disadvantages outlined solutions to leave and a separator for To create compressed gas-insulated switchgear that meets the requirements in every way. This task will solved according to the invention in that in a tubular section of the encapsulation of the switchgear the movable Middle part of the double separating section containing separators, which is held by an insulator forming a gas partition, is housed, the solid separators being in the adjacent sections of the enclosure and each of the two Isolating distances can withstand the full insulation voltage. In this case, the central part with the movable is in an advantageous manner Separating pieces receiving part of the encapsulation a grounding device is provided by means of which the movable separating pieces can be earthed in the isolated position. This grounding device can be designed in such a way that grounding is inevitable when the disconnected position is reached.

Furthermore, according to the invention, the length of the movable and the fixed separating pieces is dimensioned or their arrangement is made in such a way that that the separating pieces in the separated position do not protrude beyond the ends of the sections of the encapsulation. Furthermore, at least one of the fixed separators is also held in the enclosure by an insulator forming a bulkhead. Besides that the invention provides to operate the movable separating pieces by means of two cranks driven by a common axis, which are in their two end positions in dead center. In a continuation of the inventive concept one becomes the Gas seal of the bulkhead on the middle part only in the separated position or let the isolating contacts become effective in the dismantling position. There is thus wear and tear on the sealing parts avoided with operational circuits.

An embodiment of the invention is shown in the drawing in a longitudinal section and is shown in the following ' described in more detail.

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1 with a tubular section of the encapsulation of a switchgear "is designated, to which the" adjacent sections 2 and 3, indicated by dashed lines, connect. ^{The middle part I 1} located inside the section 1 ″ contains the two separating pieces © 4 and 5, which can move in opposite directions, and is held in the longitudinal axis of the pipe encapsulation by the isolator 6 forming a bulkhead Axis 7 is driven by the two cranks 8 and 9, ie brought into the "on" and "off" position This is done in such a way that the two separating pieces 4 and 5 engage in the fixed separating pieces 10 and 11 when switched on, which in turn in the adjacent pipe sections 2,3 are correspondingly arranged. Here, the separation sections 4, Io and 5.11 each dimensioned for itself for the full insulation voltage. with 12, a grounding device is quantified by means of which the central part I ¹ of the separation device in The separating position of the separating pieces 4, 5 is grounded. 13 is also an insulator which seals off the part 2 and at the same time accommodates the fixed separating piece 10. This However, the insulator does not necessarily have to be a partition insulator, because the partitioning by means of the insulator 6 is sufficient in itself. 13 only serves to further subdivide.

The new separating device has particularly useful structural features, which in turn bring a number of advantages. For example, the separation device is dimensioned such that they _<similar to the rest of the switchgear can be housed in a capture system. This encapsulation system is composed of tubular sections, with the separating device itself providing a single partition for the pressurized gas. Due to its practical design, the separating device enables simple installation and removal, and the attachment and removal of the adjacent parts of the system can also be carried out without difficulty. There is also the opportunity to put the middle part of the double separation section to earth with the help of a simple device as soon as the separation has been completed,

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The overall arrangement based on structural advantages "has in turn result in substantial advantages with regard to the operation and maintenance of the system. For example, it is a major relief that an overhaul can be carried out on one side of the separating device after the pressure gas has been released, while the other side is under tension. The isolating distances alone can only do their job if the required is available Meet gas pressure. This is achieved by the bulkhead insulator in such a way that when the adjacent Encapsulation part, the remaining separation point in terms of insulation is fully preserved. In the embodiment shown in the drawing, this has the effect of that for example when removing the section 2 of the encapsulation the gas pressure to the right of the insulator 6 is present in full and the isolating distance 5, 11 is effectively maintained.

Another advantage of the separating device according to the invention is based when the middle part of the double separation section after Separation is placed on earth, ensure that this is in the VDE regulations required safe disconnection and earthing are fully guaranteed that at the same time capacitive discharge currents, that could flow away via the still functioning separation point, are diverted to earth and that there is no risk of touching live parts. Thus, on the severed Side of the switchgear can be operated without danger.

For the assembly and disassembly of the entire system it is It is also useful if the separating pieces do not protrude beyond the ends of the encapsulation parts in the separated position, as they would otherwise look bulky and hinder the work.

Another advantageous subdivision of the partition can be achieve if at least one of the fixed! is held by a bulkhead insulator. The associated Part of the encapsulation removed, this can be done

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without first releasing the gas inside. With
This embodiment of the subject matter of the invention Bind thus also combines advantages, since the replacement of the separating device of adjacent sections of the encapsulation proceeds more quickly. Finally, it is considered to be particularly expedient to accommodate the separating device in a pipe encapsulation, the diameter and profile of which corresponds to the diameter and profile, by using separating pieces that can move in opposite directions together with cranks that are only slightly pivoted out
correspond to the encapsulation of the busbar feed line. With regard to its dimensions, the new isolating device fits in well with the system;

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Claims (7)

Claims 1. Separating device with two electrically in series, a double separating section "forming separating points for compressed gas-insulated switchgear, the encapsulation of which is composed of tubular sections, characterized in that the two movable separating pieces (4,5) containing the middle part (l ¹ ) of the double separating section by a an insulator (6) forming a gas partition is held and housed in a section (1) of the enclosure, two fixed separators (1-0,11 being in the adjacent sections of the enclosure, and each of the two isolating distances being dimensioned for the full insulation voltage ". 2. Separating device according to claim 1, characterized in that ^{a grounding device (12) is provided on which the middle part (I 1} ) with the movable separating pieces (4> 5) receiving part (1) of the encapsulation, by means of which the movable separating pieces in their Disconnected position can be earthed. 3. Separating device according to claim 2, characterized in that the grounding of the movable separating pieces (4,5) inevitably takes place in their separated position. 4. Separating device according to claims 1 big 3 »characterized in that that the length of the movable and the fixed separating pieces (4.5 * Lo, ll) are dimensioned in such a way or their arrangement in such a way it is taken that the separating pieces in the separated position do not protrude beyond the ends of the partial pieces (1,2,3) of the encapsulation. 5. separator n wherein _{A is} CH claims 1 to 4, "that the Gassehottung of the separator is fully effective only in the separating position or the dismounting position of the separation pieces (4,5) on the central part (1 x). 8 "2 ⁷ 2/0 -T-- 539/67 6 "! Friction device according to. Claims 1 to 5, characterized in that that at least one of the fixed! also: through an insulator (13) forming a bulkhead is held. . 7. Separating device according to claims 1 to 6, characterized in that that for actuation of the movable separating Btiicke (4,5) two jointly driven by means of an axis (7) Cranks (8,9) are arranged, which are in the two end positions are in the dead center position. - 00 98 22/0 702 L e r s e i t e