DE2018023A1 - High voltage disconnector - Google Patents

Description

The invention relates to a single column disconnector that is primarily intended for use in high-voltage switchgear »outdoors and one essentially has vertically arranged post insulator, which carries an obliquely upward., elongated cutting knife whose " upper end with a fixed mating contact in Can be associated.

When planting a high-sparging plant, it is often of great importance to be able to keep the space requirement as low as possible. Where, as in the present JPall is a switchboard outdoors, namely Plätss often must be created for it by extensive explosives, Ausschachtrags- or Aasfüllungsarbeiten. For economic reasons it is of course extremely desirable to be able to keep the scope of such relatively expensive work small, one can achieve it through the Waul of platssparen & ea, free switches.

3 for a well-known circuit breaker that is! split two equal halves and each half on one Insulator attached. Both isolators are set up vertically and when opening and closing are about 90 ° • rotated around their longitudinal axes. Require disconnectors of this type a lot of space in the horizontal plane. This space requirement can be met by using so-called pantograph disconnectors substantially reduce, in which a pincer-like'Kontaktelement is arranged so that it around grips a mating contact suspended from the line. One Such a design is particularly suitable for connecting two lines located on different levels, the execution is often used, among other things, in coastal geMets, as one can thereby maintain the tension in the upper Line can clean salt deposits from the isolating switch insulator, pantograph isolating switches are proportionate complicated and expensive.

A high-voltage circuit breaker has also been proposed with two vertical and in different

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to execute isolators arranged at high altitudes. Of the an isolator; which can be rotated by 90 ° around its longitudinal axis, carries the cutting knife, the other insulator the fixed ffegenkontakt. The difference in height between the two on both isolators arranged terminals is at least exactly as large as or larger than the required in this embodiment

109809/1 2.4 Ö V ö -

BATH ORIGINAL

Phase distance for the respective operating voltage. aside from that the horizontal distance between the longitudinal axes of the insulators must be at least equal to the required distance between phase and earth, since the insulators with their contact organs are held together by an iron frame Form a unit in which the earth potential is at the level of the lowest connection terminal of the insulator. That has, among other things, the Disadvantage that the field width in switchgear where this disconnector is used is unnecessarily large. Because of the requires a relatively large radial distance between the axis of rotation of the circuit breaker insulator and the mating contact the circuit breaker also has a relatively large operating force, and the circuit breaker insulator becomes relatively large Exposed to twisting and bending moors.

The difficulties mentioned are avoided by an inventive device Disconnector in which the post insulator is rotated at least 90 about its longitudinal axis when the disconnector is actuated and which is characterized in that the free end of the cutting knife when actuated is part of a horizontal Plane lying circle describes the center of which lies on the longitudinal axis of the rotatable isolator and its Diameter is substantially equal to or shorter than that Length of the cutting knife. Such a circuit breaker is significant simpler and cheaper than a pantograph isolating switch, but otherwise has the same advantages as this one. It is relatively easy to operate and the mechanical stress on the circuit breaker insulator is relatively low.

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BATH ORIGINAL

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The mating contact advantageously has a fastening element for hanging on a line or for fastening to a support device arranged to carry the line. Since the mating contact, just like a pantograph disconnector, is a part that is structurally separate from the other parts of the disconnector, a particularly simple disconnector construction is obtained, the grounded frame of which does not need to extend higher than the lower end of the rotatable disconnector insulator. (

In order to limit the space required by the switchgear in the horizontal plane while maintaining the required distance between the cutting knife in its ATJS position and the line system on which the mating contacts are suspended, it is advantageous if the fastening element for the mating contact consists of a terminal for the line is provided with elongated metallic pegs. Alternatively, the disconnection knife can be straight and mounted on a metal arm protruding horizontally from the disconnector * isolator at the upper end.

The separating knife can also advantageously be attached to the rotatable Be attached to the isolator so that it can easily be inserted into the Horizontal position can be brought. The contact arrangement is thereby easily accessible and you can. can clean the circuit breaker isolator even if the voltage is in

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- 5 of the upper line is maintained.

The invention is described in more detail below with reference to the drawing. In this show:

Pig. 1 and 2 an embodiment of a

According to the invention designed isolating switch from above baw "seen from the side in one panel of a high-voltage switchgear,

]? ig. 3 a Tresma holder of the same type as Bypass disconnector for one on line connected to the switchgear and

ig »4 and 5 in two at right angles to each other Views of a fastening of the cutting knife

on the associated rotatable isolator.

That in Pig. 1 and 2 of a switchgear assembly includes a three-phase busbar system 1, 2 _y . 3 w && a three-phase branch line that can be connected to this via a TV switch 4 _S 5 »δ» The Sasmelschien system and the junction junction JEreuzes, each other on different levels. Jeüex airennschalterpol consists of a vertically aligned rotatable isolator l _s α®τ a scteäggestell © s Srensiaesser

wearing. The cutting knife 8 is shown both in its ON position (solid line) and in its OFF position (dashed line). The separating knife 8 works together with a mating contact 9 * which is attached to the busbar system and consists of a pin protruding downward from the busbar system. A further reduction of the panel width of the switchgear is possible if this pin is made longer than the one shown. At the upper end of the insulators 7, the branch lines 4, 5, 6 are connected to the isolating switch by means of connection terminals, the connection terminals being rotatable in relation to the insulators 7. i

The disconnector 7, 8 and the busbar system 1, 2, are attached to one and the same iron frame, which acts as a portal with two on different horizontal levels arranged parallel carriers 1O and 11 constructed and is set up on two foundations 12 and 13.

3 shows / in a side view how a branch line 14 can be connected to a switchgear. The line that comes from a cable box 15 leads through a voltage converter 16, a current transformer 17, a line disconnector 18 of conventional design for the switchgear and continues to run through a circuit breaker, not shown and a busbar separator, also not shown

1 0 9B09 / 1 2 Λ9

holder to the busbar system of the switchgear. In parallel with the circuit breaker and the disconnector 18 is a bridging disconnector 19 according to the invention arranged. This circuit breaker is, as shown, on a rack 21 arranged to support the bypass line 20 built up, whereby separate foundations for the circuit breaker 19 are dispensable, the necessary for its division additional frame parts are limited to a console 22. From Pig. 3 also shows that the one for the switchgear required space in the horizontal plane is smaller than a bypass switch as a disconnector the same design as the line disconnect switch 18 would have used.

4 and 5 show the attachment of the cutting knife 8 to the rotatable insulator 7. The cutting knife 8 is in this Execution is rotatably suspended on a horizontally aligned bearing pin 23 and normally with a split pin 24 locked. When the split pin 24 is removed, the cutting knife can be folded down. The contact arrangement This makes it easy to reach for checks and revisions and gives you more space for work in the switchgear. In industrial areas with polluted air or in coastal areas where it is easy to get a salt cover on the Is insulator china, it is a major advantage that you can keep the operation on the

109809/124

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Clean the disconnector insulators 7 in the busbar system can.

T098O9 / 124Ö

Claims (7)

- Q _ claims: 1. J high-voltage disconnector with an essentially 'vertically arranged post insulator, which is rotated at least 90 ° around its longitudinal axis when the disconnector is actuated, and an elongated cutting knife carried by it, its upper end connected to a fixed mating contact ψ can be brought, characterized in that the free end of the cutting knife (8) describes part of a circle lying in an essentially horizontal plane, the center of which lies on the longitudinal axis of the rotatable isolator (7) and the diameter of which is essentially is equal to or less than the length of the cutting knife (8). ν. 2. High voltage disconnector according to claim 1, characterized Il marked that the GegenkoataJst (9) at the lower end a vertically suspended post insulator is attached. ^ 3. High-voltage line disconnector according to claim 1 or 2, characterized in that <äa @ the counter-contact (9) with a fastening device for hanging on a line (e.g. 3) o & ev for fastening © aa eiaar siam Sragea d © r line eye- « ordered SragTOrrielrtaig wysehea 241 -TO- 4. High-voltage disconnector according to claim 3, characterized in that that the fastening member consists of an elongated one provided with a connection terminal for the line, metallic pin (9) consists. 5. High-voltage disconnector according to one of the preceding claims, characterized in that the upper end of the Post insulator (7) with a relative to the rotatable Insulator (7) · rotatable connection terminal for a cable (ζ.Β.φ is provided. 6. High-voltage disconnector according to one of the preceding Claims, characterized in that the cutting knife (8) "so designed or attached to the rotatable post insulator (7) is that the shortest distance between the mating contact (9) and the cutting knife (8) with the switch open in the essentially the same is the distance between the mating contact (9) and the upper end of the cutting knife (8). 7. High-voltage disconnector according to one of the preceding Claims, characterized in that the cutting knife (8) via a joint that can be locked by means of a lock (24) is attached to the rotatable isolator (7) with a horizontal axis of rotation (23). 1098097124