DE1995069U - THREE-POLE CIRCUIT BREAKER. - Google Patents

Description

RArBOI6343-25 7.68

SIEMENS AKTIENGESELLSCHAFT Berlin and Munich

PLA 68/0123

2 5 JUL11968

The price increase affects a three-pole circuit breaker for voltages of 200 kV and more. Such switches are also referred to as high voltage switches, because they are in Three-phase networks of the highest currently common voltages are used.

The aim of the innovation is to reduce the size of high-voltage switches and cheaper. This is achieved to a considerable extent by the fact that the three poles are equally one Have post insulator, which carries the switching devices, which may be connected in series, so that the three support

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PLA 68/0123

Isolators are mounted on a single common elongated chassis that is used for all switch poles (common carries the necessary supply devices, drive means, etc., and that the poles with their sides are furthest Auslad end what parts are parallel to each other run to the longitudinal direction of the chassis.

The innovation is based on the knowledge that the previous Usual construction of the extra high voltage switch? at which everyone Pole has its own chassis or, under certain circumstances, even several, the desirable reduction in size and cheaper necessarily sets a limit. L.iesü limit has so far been respected because it was believed that the number and Size of the connection sections required for high tensioning stretches and their mutual distance (striking distance) do not allow a structural combination anyway. As usual construction one had a construction in which the switching distances one pole of two, three or even four post insulators Were worn and the longitudinal direction of the poles with the longitudinal direction of the chassis matched.

In the case of the construction according to the innovation, on the other hand, a common chassis with an entirely portable length is sufficient for receiving it of all three poles. All switching devices of a pole that are connected in heat to control the voltage,

PLA 68/0123

are arranged on a single post insulator. This means that the longitudinal direction of the poles is no longer through the series of several Stud insulators determined. Due to the arrangement of the parts that have been the most expansive since = borrowed transversely to the longitudinal direction of the chassis succeeds in limiting the length of the chassis to little more than double the pole center distance. This length of the chassis is found to be bsi the construction usual for chassis just good, suitable, the supply facilities required for the switch poles, To accommodate drive means, etc. So you get a switch in which the chassis in its through the At the same time, pole pillars determined the mechanical strength of the adequate space for the facilities that the Requires switch operation.

A particularly cheap solution for a three-pole circuit breaker According to the innovation, sulfur hexafluoride (SFg) as an extinguishing agent is obtained from a single, supply facility common to all poles is monitored and, if necessary, cleaned and compacted. The utility is arranged in the chassis. Furthermore, the chassis is a common energy store for actuation assigned to all three poles. This energy store can be a hydropneusatiseher store that stores the energy

PLA 68/0123

for the hydraulic actuation of the switch poles. But it can also be a compressed air tank, if the switch is actuated pneumatically one even unite the supply device with the energy storage, Yienn the switching routes with the as extinguishing agent serving sulfur hexafluoride are operated pneumatically at the same time.

Switch with at least two electrically in series Switching sections that are spatially on one axis are advantageously designed so that the axis of the switching sections runs at right angles to the longitudinal direction of the chassis for all poles and that the switching distance? each pole respectively are symmetrically coupled to a drive rod. With this construction, there is a good balance of inertia forces that occur when switching, caused by the moving Contact piece and the drive elements at high speeds can be caused. This is more important for switches after the fire than for the conventional ones Switches because there are more than two support insulators are provided per pole, which can form a stable iron together with the switching chambers and the chassis.

The circuit breaker after firing can be provided with bolts for driving the circuit breaker in the known manner.

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PM 68/0123

These hollows are no longer only assigned to the corners of the chassis, but the chassis has for everyone Pole Hollen in at least approximately symmetrical distribution on. The weight of the pole pillars is then "immediately on a short vertical path to the earth. This avoids sagging of the chassis or torsion forces.

For a circuit breaker with attached to the chassis Compressed air drives as well as a compressed air and an extinguishing agent container should be the compressed air and the extinguishing agent container in the space between the poles on one side of the chassis and the pneumatic drives in the area the Jrol columns on the other side of the longitudinal axis of the chassis to be appropriate. This further contributes to the even weight distribution and thus reduces the mechanical Stress. Under certain circumstances, compressed air and extinguishing agent containers can also be used as load-bearing components in the Include the structure of the chassis.

Doing training? of the pole columns depends on the number of Interruption points that are required to control voltages of 200 kV and more. With sulfur hexafluoride as an extinguishing agent one comes for most applications already with two switching routes in series

PLA 68/0125

from, as explained in more detail with reference to the exemplary embodiment. If air or oil is used, more switching paths may be required, which are then to be nested with one another in a horizontal and / or vertical view so that they find Plat ¹⁷ on a single post insulator. In any case, however, it is advisable to design the pole columns symmetrically with respect to a plane of symmetry running vertically through the longitudinal axis of the chassis.

In the accompanying figures is a three pole circuit breaker for 220 kV shown in a front view (Fig. 1), a top view (Fig. 2) and a side view (Fig. 3), which is described below.

As can be seen, the new circuit breaker has a box-shaped, elongated chassis 1 which carries the three pole columns 2, 3 and 4. The three pole columns are designed in the same way. A single post insulator 5, which consists of two porcelain parts 6 with suitable metal fittings, belongs to each of them. The porcelain parts are hollow.

The switch head is located at the upper end of the post insulators 5 7. A metallic gear housing 8 belongs to this the upper end of which is arranged a memory 9 for the sulfur hexafluoride used as an extinguishing agent. The Schelter

PLA 68/0123

head T is symmetrical to one through the axis of the post insulator 5 and the longitudinal axis of the chassis selling plane of symmetry formed. He has one on each side same switching chamber 12, which extends horizontally, and control capacitors 13 »which are parallel to the Switching chambers 12 are arranged, both electrically as well as spatially. The switching devices of the switching chambers 12 are electrically connected in series through the gearbox. The connection bolts of the switch are denoted by 14.

The circuit breaker uses that which serves as an extinguishing agent Sulfur hexafluoride in a two-pressure gas system with a closed gas circuit. The gas arrives by opening a not shown The blower valve during the switch-off process zv / ischen the switching pieces designed alo double nozzle and blows there the cut-out arc. After the arc is extinguished, the gas is released from a low-pressure container to which the inside of the switch head 8 and the post insulator 5, sucked in by a compressor and again at high pressure condensed. The facilities required for this are common to all three poles. In Fig. 2 one recognizes the common Extinguishing agent storage serving boiler 16, which in the figure between the middle and the right pole

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PLA 68/0123

arranged on one side of the longitudinal axis of the chassis istc The associated compressor is housed in area 17 of the chassis and is easily accessible through cover 18

According to the innovation, the contact pieces are mechanically driven on the switch. For this purpose , each switch PC-1 2, 3, 4 is assigned its own compressed air drive 20. The Druskluft drives 20 are fed by a common compressed air tank 21, which is the only energy source for operating the switch. The compressed air is only used for switching on. It is switched off by springs which are arranged in the compressed air drives 20 and in the switch head 7 of each pole. The drive movement of the compressed air drives 20 is transmitted to the switching chambers 12 through an insulating rod.

The switch according to the innovation is designed to be mobile. It can be seen that a pair of rollers 25 are provided under each pole column is. Therefore, the weight forces of the pole columns are without significant stress on the chassis 1 on the Transferred to the ground. The cover can be repositioned so that the switch can be moved in the longitudinal direction of the chassis or across it can be moved.

PLA 68/0123

The switch according to the innovation has proven itself excellently in tests. Due to the new design, it is a construction that requires a minimum of space and material. The cost is compared to the usual switches only 5Q $ Descending less.

3 figures
6 claims

1995 §69

Claims (6)

BU016343-25 7.68 PLA 68/0123 1. Three-pole circuit breaker for voltages of 200 kV and more (extra high voltage switch), characterized in that the three poles (2, 3, A) are equally a single one Dn4 Ί * λ switched switching devices (switching chambers 12), that the three post insulators (5) are mounted on a single common elongated chassis (1) which is for all switch poles together the necessary supply facilities, Drive means, etc. (16, 17, 20, 21) carries, and that the poles (2, 3 »4) with their sides furthest overhanging parts parallel to each other ^ 'a ^ r to Run in the longitudinal direction of the chassis (1). 2. Circuit breaker according to claim 1, characterized in that sulfur hexafluoride (SFg) is used as the extinguishing agent, monitored by a single supply device (16, 17) common to all poles and cleaned if necessary that the chassis is also assigned a common energy store (21) for actuating all three poles. - 10 - rf i. · PLA68 / 0123 3. Circuit breaker according to claim 1 or 2 with at least two electrically in series and spatially on one axis switching + stretch per pole, characterized in that the axis of the switching chambers (12) for all poles (2, 3, 4) runs at right angles to the longitudinal direction of the chassis (1) and that the switching paths of each pole are each symmetrically coupled to a drive rod. 4. Circuit breaker according to claim 1, 2 or 3 with rollers for driving the switch, characterized in that the Has chassis (1) for each pole lobes (25) in at least approximately symmetrical distribution. 5. Circuit breaker according to claim 1 or one of the following with pneumatic drives attached to the chassis so / ie a compressed air and an extinguishing agent container, characterized in that the compressed air and the extinguishing agent container (16, 21) in the space between the poles (2, 3, 4) on one side of the chassis (1) and the compressed air drives (20) in the area of the pole columns (2, 3, 4) on the other side? the longitudinal axis of the chassis (1) are attached. 6. Circuit breaker according to claim 5 _V, characterized in that the pole columns (2, 3 »4) are designed symmetrically to a vertically through the longitudinal axis of the chassis (1) extending Symmetretsne. - 11 -