DE1665255A1 - Metal-enclosed switching device for high voltage - Google Patents

Description

E Ar / IV DipI.-Jng.E.F.etner Case 8411 ^PitenUnW4k 2 2, July 1967

NV ^w COQ lf, in Utrecht, the Netherlands · "Metal- ^{enclosed switching device for high voltage ·"}

The invention relates to a metal-enclosed Switching device for high voltage with a metal casing that can be connected to earth and switching springs arranged in it, which each contain at least two elements connected to one another by one! disconnector, which! disconnector with two fixed main contacts kept at a distance, each permanently connected to such an element, one through a solid transverse wall made of insulating material, double-acting, two-part, movable switching contact and one with this envelope is provided electrically conductively connected grounding contact, which movable switching contact with its one Part brought into contact with one fixed main contact and with its other part with the other fixed main contact and separated therefrom and in the switched-off state of the switch through this grounding contact to be electrically conductive with the metal Enclosure can be connected, which transverse wall permanently separates the space within the metal envelope into two, each with at least one part of an element with the permanently connected fixed main contact and the part of the movable sohaltkontakt · © that cooperates with this contact containing table distributed

Switching devices of this type are from the UK Patent specification 472 * 656 known · Dl · Transverse wall made of insulating material

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and the ground contact make it possible to connect the two through the ! Isolation switch to separate separate elements spatially and electrically, so that there is no danger to one element work can be carried out when the other element is live · In these known switching devices, the one is insulating Transverse wall directly between the flanges of the two ropes of the envelope connected to one another by splashing clamped, in which the elements to be electrically connected to one another are located. This type of construction makes it impossible for one ! To remove part of the envelope with the elements and organs contained therein without .that also the transverse wall with the movable Circuit breaker part removed and thereby the other! Part of the envelope with the elements and arranged therein Organs is opened · The known device therefore has the disadvantage that the removal of a rope through the ! Isolation switch interconnectable ropes of the switching device makes it necessary that the other part of the switching device just as the rope to be removed is made tension-free, which in many cases means that the busbar systems and therefore the entire switching device must be de-energized

The invention has the purpose of this disadvantage of the known Switching devices to avoid · It consists in that the transverse wall is made of insulating material and that through this wall worn, double-acting, two-part, movable switch contact duroh a rope of the metal sheath can be worn and are arranged in this rope, which is also the ground contact carries and on both sides near this transverse wall the sheath is detachably connected to the ropes, the

009084/0729

One fixed main contact each of the (disconnector and one permanent associated element or · a permanently associated part of this element · must now contain one of the two Parts of the envelope with the elements and organs arranged therein are removed, the transverse wall remains like a lid attached to the other part of the enclosure · This is especially important when the compartments of the switching device are under gas Pressure, ζ · Β · sulfur hexafluoride (SPg), are filled and the state of insulation in the switching device is strongly influenced by the gas pressure is dependent. In such a case, when one part of the switching device is removed, the other part can be under normal Gas pressure and therefore remain live without danger

To inspect, restore or replace the parts of the double-acting, two-part, movable switch contact of the disconnector and cleaning of the insulating transverse wall To enable a construction is recommended, whereby each of these parts of this movable switching contact can be separated and is removably attached to the drive mechanism and to the other part of this switch contact. After the disconnector has been switched off and after one part of the enclosure has been removed With its content, the part of the movable switch contact that is present on the cleared side of the insulating transverse wall can then be used also be removed »

When designing the switching device, it is ensured that the parting lines between the named parts the metal sheath extends across the between the Retained parts of the movable switch contact and the working fixed main contacts of the disconnector located free spaces extend, so the part can with

009884/0729

the bulkhead and the one in the switched-off state double switching contact in the transverse direction are removed from the switching device, while the! rush of the envelope with the fixed Circuit breaker contacts and the elements permanently connected to them stay in place. Well then these will be firm Contacts and these elements must be made tension-free »

The invention will be explained in more detail with reference to the drawing. In it is:

Pig. 1 shows an axial section of two components connected by an isolating switch with axially movable switching pins a switching device according to the invention, and

Fig. 2 is a vertical section of a switch panel of such a switching device with disconnectors, which in principle the one after Pig. 1 correspond.

The device according to Fig. 1 consists of two parts 1 and 2 of a metal-enclosed switching device, of which the non-illustrated current-carrying elements, such as a rail of a busbar system, a circuit breaker, cable connection elements or the like, are arranged in separate compartments of the metal casing of the switching device and can be electrically connected to one another by a circuit breaker 3. The sheath of this disconnector consists of four coaxial tubular parts 4, 5, 6, 7, the parts 4 and 7 of which are attached to parts 1 and 2 of the switching device and are supported by bushing isolators 8, 9 firmly surrounding the main contact 10, 11 · These main coatacts are through the connection of conductors 12, 13 with the above-mentioned through the

Separation age can be connected to each other * elements permanently

•. 009884/0729

bound. The tubular intermediate part of the cover of the switch located between the parts 4 and 7 itself consists of two ropes 5 »6, which both by splashing 14» 15 on splashing 16, 17 of the parts 4, 7 of the covering and by splashing 18 , 19 are fastened to one another · Between the paddles 18, 19 a transverse wall 20 made of insulating material is clipped, which carries two axially movable switch pins 21, 22 driven at the same time. For its drive, each switching pin is provided with a toothed rack 23, 24- which engages in a toothed wheel 26 attached to the drive shaft 25. This drive shaft can be operated from the outside via an insulator (not visible) »The axially movable switching pins 21, 22 interact with the fixed main contacts 10, 11 and they are permanently electrically conductive to one another in a manner not specified. are each screwed onto an axial screw pin 27 attached to the toothed racks, 23 · 24, so that they can easily be dismantled, restored or replaced with which a grounding contact 29 designed as an axially movable switching pin works together · This grounding contact is moved by a piston 31 which is movable in a cylinder 30 · The grounding contact is controlled in a manner not described in more detail in such a way that it is only brought into the operative state after the switching pins 21 _f 22 during the AasschaltVorganges on an a sufficient distance has been removed from the fixed main contacts 10, 11

Musi aB the rope 1 of the switching device for it

su Ttrriohtende work be taken away, so values: 4Li * Plan

009884/0729

see Hi 16 released. The transverse wall 20 with the switch pins 21, 22, which are then of course in the switched-off position and are earthed, remain in place and in this case Place, so that the a.B. filled with gas under pressure Space 32 located fixed main contact 11 with the permanent with it connected element in the rope 2 of the switching device under Voltage can remain · At the same time, the switching pin 21 and the surface of the insulating transverse wall 20 can be on the side this switch pin can be inspected, restored or cleaned. Must the! Part. 2 of the switching device removed or the other side of the circuit breaker are inspected, the flanges 15, 17 must be loosened from one another and the fixed main contact 10 with the part of the switching device connected therewith can then remain under voltage.

From Fig. 1 it can be seen that the parting planes 33, 34 between the flanges Ht 16 and 15 »17 the free spaces between cut through the switched off switch pins 21, 22 and the fixed main contacts 10, 11 This makes it possible that, after the entire switching device has been de-energized, the intermediate part 5 »6 of the envelope with the transverse wall 20 and dtn switching pins 21, 22 is removed as a whole in the transverse direction from the switching device, while parts 1 and 2 with 4 »7» bushing insulators 8, 9 »fixed ones go to the tube Main contacts 10, 11, the connecting conductors 12, 13 and the permanently connected elements in parts 1 and 2 in place and stay »

Ü0 it is noted that the intermediate part 5 »6 of the metal Enclosure of the disconnector also from a single tube

009884/0723

"can exist in which the transverse wall 20 is pushed and through. inner flanges are made stationary. Such a design has been shown in Pig 2

Fig. 2 shows a single-phase switch panel of a metal-enclosed Switching device with two busbar systems 35 »36» two implemented almost in the manner shown in FIG. 1 Busbar disconnectors 37, 38, the intermediate part of which is the metal casing with the insulating transverse wall and the switching pins consist of one piece 39 »40, a circuit breaker 41, one of the busbar disconnectors 37 »38 Corresponding cable disconnector 42 with an intermediate part 43 and a cable termination 44« The special feature of this The switching device is that the intermediate part 39, 40 of each busbar disconnector 37, 38 is between a connection piece 45, 46 of the metal tube 47 »48 surrounding the rail 35» 36 and a connection piece 49, 50 of the metal vessel 51 dee Circuit breaker 41 and that the intermediate part 43 of the cable disconnector 42 between a connection piece 52 of the vessel 51 and a connection piece 53 of the metal casing 54 of the cable termination 44 is separable and removable · In this switching device, the halves of the Isolating switches 37 »38, 42 are no longer arranged in separate compartments of the switching device. Both the spatial and the electrical separation of the busbar systems on the one hand and dee Circuit breaker on the other hand and the same of the circuit breaker on the one hand and the cable termination on the other hand the insulating transverse walls of the disconnectors as well as the Separability and the removability of the intermediate parts with the

009884/0729

Transverse walls and the switching pins of the! Disconnector on the one hand of the circuit breaker and, on the other hand, of the busbar systems and the cable termination make in many Make these separate compartments superfluous · This simplifies the construction and saves space received, as the bushing insulators for the connection of the fixed main contacts of the disconnector with the rest Elements of the switching device are eliminated.

00988A / 0729

Claims (1)

Claims 1. Metal-enclosed switching device for high voltage with a metal sheath connected to earth and arranged therein switching springs which each contain at least two elements connected to one another by a disconnector, which! Disconnector with two held apart, each with such an element permanently connected, fixed main contacts, a double-acting, two-part, W movable switching contact carried by a solid transverse wall made of insulating material and an earth contact connected to this casing in an electrically conductive manner, which movable switching contact is provided with one part with one fixed main contact and with its other Part brought into contact with the other fixed main contact and separated therefrom and in the switched-off state of the switch through. This grounding contact can be connected to the metal envelope in an electrically conductive manner, which transverse wall lasts the tree within the metal envelope ernd into two separate, per m of at least a portion of a member with the main fixed contact permanently associated and cooperating with the contact part of the compartments movable switch contact containing spread, characterized in that the $ the transverse wall of insulating material and the information carried by this wall, double-acting, two-part, movable switching, contact are carried by a part of the metal envelope and are arranged in this part, which at the same time carries the Brdungekontakt and this on both sides in the NShe 009884/0729 BATH ORIGINAL Transverse wall with the parts of this envelope is separably connected - each having a fixed main contact of the disconnector and contain a permanently connected element or a permanently connected rope of this element 2 · Metal-enclosed switching device according to claim 1, characterized in that each part of the double-acting, two-part, movable switching contact of the disconnector can be separated and removed from the drive mechanism ^ nismue and is attached to the other part of this switch contact 3 · Metal-enclosed switching device according to claim or 2, characterized in that the The dividing lines between the mentioned parts of the metal casing extend across the lines between the switched off Parts of the movable switch contact and the fixed main contacts of the disconnector that work together with it are located extend free spaces » jrSd ^ -— Pat «nt« nw «k 009884/0729