DE2018968A1 - High voltage circuit breaker - Google Patents

Description

HEINZ LlNSER PATENTANWALT · PHYSICIST 2018968

'1072 DREIEtCHENHAIN

BERLIN RINQ '. Call (06103) 81113

1476-11 GB - 03278

General Electric Company

1 River Road
Schenectady, NY, USA

High voltage line switch

The invention "relates to a high voltage vacuum power scarf ter and in particular to a circuit breaker of this type, the several Yakkumlastachaltereinheiten which are electrically connected in series.

For certain known circuit breakers of this kind are fixed Λ the Vakuumlastachaltereinheiten aligned to form a structure and an insulating housing having a tubular shape is provided around the building, in order to create a weatherproof housing. The individual circuit breaker units of such a structure are operated by one or more movable operating rods which extend longitudinally to the structure and are arranged within the weatherproof insulating housing. A disadvantage of this arrangement is that the housing diameter must be relatively large in order to accommodate both the circuit breakers of the structure and the actuating rods, and such large housing diameters are very expensive.

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009846/1150

Another disadvantage is that the aligned Load switches have the consequence that the assembly and the surrounding housing are unnecessarily long, · whereby the Costs continue to rise.

An object of the present invention is therefore to arrange the vacuum circuit breaker units in such a way that for an expensive large housing diameter for the housing the load switch and its operating rods are not necessary and further such that the structure is reduced in length.

Another object of the invention is to provide a high voltage vacuum circuit breaker to propose which is suitable for a construction as a basic unit, which in a different Number can be used to build a circuit breaker for different rated voltages.

Another task is to make the circuit breaker that way to construct that individual circuit breaker units and their operating linkages can be easily inspected, adjusted, and if necessary, can be replaced without the remaining load switch units and linkages and their supporting structures to be influenced.

To achieve the objects according to the invention, first, second and third tubular insulators are proposed in an exemplary embodiment, which are attached approximately axially aligned with one another. With the first, second and third tubular insulators _s first second and third vacuum load switches are connected accordingly. Fastening means, which are arranged at opposite ends of the isolator and which extend laterally from them, are used for fastening the yakuumlas "Eoh & lt & rs, the n: .t etr.eir. Given: isolator in Be-Eiig on the connected isolator. : h laterally and approximately in a l £ rsgrg't directed en floodplain r Richt ür. £ extends., provided *

ί Λ A f 1 ft if f ψ # ■

i> 0 & fc 41 / ·. ^! ξ. %

COPY BAD ORIGINAL

The load switches are electrically connected in series, and adjacent switches in the series connection are arranged laterally offset relative to one another. A longitudinally movable actuator rod extends through the aligned tubular Iedators, and a linkage that is linked to the LaStSClIaI ^-1 -ar is provided for coupling the movable contact rod to the longitudinally movable actuator rod.

The invention is explained further with reference to the drawing described in more detail. Here show:

Figure 1 is a side view of part of a vacuum circuit breaker, the one embodiment of the invention

reproduces;
Figure 2 is a sectional view taken along line 2-2 of Figure 1;

Figure 3 is a plan view of the circuit breaker according to Figure 1 and FIG. 4 is a sectional view along the line 4-4 of FIG.

The circuit breaker shown in Figure 1 has a horizontally extending load switch structure 12 und.ein pair of horizontally separated vertical isolator columns 14 and 16 for Support of the load switch structure on its opposite End up. The insulating column 14 carries at its upper end a metal housing 18 to which the circuit breaker assembly 12 is suitable is attached. This metal housing 18 and the insulating column 14 form the casing for a high-voltage current transformer, of the type shown in U.S. Patent 3,380,009. The details of this current transformer arrangement are not the subject of the present invention, however therefore not detailed here either.

The vertical insulating column 16 on the right side of the circuit breaker assembly 12 is a tubular member that is used for . the alternately attached vertical actuation tab 20

008848/1153

BATH ORIGINAL

of the circuit breaker forms a housing. A metal housing 22 is connected to the upper part of the insulating column 16 and is suitably fastened to the right-hand end of the interruption arrangement 12. As can be seen from FIG. 4, within the metal housing 22 there is an angle lever 24 which is rotatably mounted at 25 and which is rotatably attached to the vertical actuating rod 20 by an arm. The other arm of the lever 24 is rotatably connected to a horizontal operating rod 26 which will be described later. A suitable, non-illustrated actuating mechanism is connected mi · ¹ the lower end of the vertical actuation rod 20, to drive this to close the power switch down.

The circuit breaker structure 12 shown in FIG. 1 has a plurality of shaped insulators 30, 31, 32 and 33 which are aligned with one another with their longitudinal axes. At the right end of this tube shape, -; - in insulators 30-33 there is a metal housing 35 in an elongated box shape. This metal housing 35 sin-; are arranged feet with respect to the tubular "insulators and extend radially outward therefrom. Several connections / * :: s * äb-3 -38 (Figures 2 and 3) of insulating material pass through the aligned tubular insulators 30-33 and serve ϊπζν, the insulators and the metal housing 35 to samrcenzukle ^ men, so da.'i a solid self-supporting arrangement is formed v, drd One overlying ends of the connecting rods 3ü are screwed on. Tightening the nuts puts the rods in tension and presses the tubular insulators together. Suitable resilient washers 42 under the nuts 40 at the left end of the connecting rods regulate the size of the Klemir.kräf te.

The load switch assembly 12 also has four vacuum load switches 50, 51, 52 and 53 which are electrically connected in series.

6/1159 bad original

As shown in FIG . 4, each circuit breaker is of conventional design and, as such, has a highly evacuated tubular enclosure 60 and a pair of separable contacts 62 and 63 located within the enclosure. The enclosure 60 has a tubular housing 66 of suitable insulating material, such as glass, and metal end caps 64 and 65 connected to the housing at opposite ends thereof by suitable glass-to-metal seals. The contact 62 is a stationary contact which is on a conductive rod 67 which extends in sealed form through the end cap 64, while the other contact 63 is a movable contact which is mounted on a reciprocating conductive actuator rod 68 which extends through the other end cap 65. A flexible metal bellows 70 sealed at its opposite ends to the rod 68 and end cap 65 provides a seal around the rod 68 and allows it to be reciprocated without degrading the vacuum within the envelope 60 .

In order to provide a weatherproof seal around each circuit breaker, the casing 60 of each circuit breaker is encapsulated by a suitable insulating material which forms a protective shell around the casing. The shell 72 is connected to the exterior of the enclosure and the outside Λ has an insulating bell, in order to increase the electrical creepage distance.

Each of these vacuum switches 50-53 is next to one of the tubular ones Is attached to isolators 30-33 and is arranged with its connected tubular isolator in longitudinal alignment. So e.g., as can be seen in Figures 1 and 3, the vacuum load switch 50 attached next to the tubular insulator 30 and arranged in the longitudinal direction. A corresponding relationship exists between the insulator 31 and the load switch 51, between the insulator 32 and the load switch 52, and between the isolator 33 and load switch 53

009846/1159

The Vakuumlastschaltar, ά = τ is associated with a given tubular insulator is partially fixed to the associated box-shaped housing 35 extending from the right 3nde of the tubular insulator of -erstreckt. This can be seen from Firur 4, where the nuts 76 are shown on the bolts 75 with the right end caps 65 of the circuit breaker 50, which clamp the end caps to the left end wall 76 of the adjacent box housing 35.

As can be seen from FIG. 3, the load switches 50, 51, 52 and 53 are attached in such a way that neighboring load switches are also attached their longitudinal axes are laterally offset from one another. With respect to a vertical reference plane 77 passing through the longitudinal axis of the aligned tubular insulators 50-53 (see Figures 2 and 3) are adjacent circuit breakers arranged on opposite sides of this reference plane. To arrange the load switches in this way, are the longitudinal center lines 78 of the adjacent box bodies extending from the tubular insulators, located on opposite sides of the reference plane 77 (see FIG Figure 2).

To support the left end of each circuit breaker 50, 51 and 52, a metal bracket 90 is attached to the exterior of the box body 35 which supports the adjacent circuit breaker. Bolts 92 are used on the left end cap of the circuit breaker to secure it to bracket 90. Bolts 93 are used to secure the metal bracket 90 to the box housing 35 connected to the adjacent circuit breaker Load switch at its distal end and attached to the box housing 35 at its nearest end. The closing forces of the load switch are ^{transmitted via the bracket support 1} 90 at its distal end.

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00984-6 - /. 11 59

In order to electrically connect the circuit breakers in series, a plurality of conductive straps 95 are provided at locations between the circuit breakers. Each of these bands 9? (see Figure 2) 67 is one of the vacuum circuit breaker and the end structure 86 of the box housing 35 which carries a ^J ii adjacent load switch connected between the stationary conductive rod. Each conductive B'inri 95 consists of two r-ftr-i Helen sections, which are zii..ir-: rn ' ^j n,; Te> lenint around the stationary contact rod 97 of the connected circuit breaker, in order to ensure a good electrical connection between. ---:.: hen manufacture these parts. Within each box housing 35, a flexible, conductive strand 98 is provided for connecting the end axle structure 96 to the movable contact rod of the connected load switch.

The limit load switches 50 and 53 are electrically connected to the connections 102 and correspondingly 100 of the power supply via the lines, which can be done in any suitable form. For example (see Figure 4) a conductor 103 with a ¹ 'U-shape can only connect d-> £? Connection 102 of the power switch with the connection structure 96 on the adjacent box; housing 35 of the circuit breaker 50 can be used. The other connection 100 of the circuit breaker is located at the outer end of the conductive bolt in the current transformer 18, 14. The inner end of the conductive stud, shown at 104, is mated to an adjacent metal housing 105. ™ mechanically and electrically connected. A suitable conductor 95a (see FIG. 4) is connected between the housing 105 and the stationary contact rod 67 of the circuit breaker 53 at the left end of the laser switch assembly 12.

In order to close the load switches 50-53 mechanically almost simultaneously actuate, an actuating linkage 110 is provided for each load switch, which the movable contact rod 68 of the load switch with the horizontal operating rod 26 couples.

-8th-

009846/1 159

BATH ORIGINAL

Each of these linkages 110 is located in a box structure 35, which carries the connected load switch. Each linkage 110 consists of a first angle lever 112, which is on a stationary Axis of rotation 113 is rotatably attached, and which is rotatably connected to an arm with the horizontal B. actuating rod 26 is. The other arm of the angle lever 112 is connected to an arm of a second angle lever via a suitable wiper mechanism 115 118 attached. The second angle lever is rotatably mounted on a stationary axis of rotation 120, its opposite Arm with the movable contact rod 68 of the circuit breaker is rotatably attached.

If the horizontal actuating rod 26, as viewed from Figure 4 of _v, is driven to the right, he acts on each linkage 110 to the load switches which are varbunc'en with this particular linkage to s: s v.lie /. Venn the horizontal b 'to b-j stäti ° .n' \ e Jt-- .C ^ in a position shown in Fi: ~ ur returns 4, v / ground the ^{Betätigungskr:} IFTE over here? Transfer linkage 110 to open circuit breakers.

The V / ischermechanisrnus 115 is only in schematic form rather dargas th Ht, as it can be of any suitable conventional type. An example of a suitable wiper mechanism is shown in Figure 5 of US Pat. No. 3,025,375.

The actuation force for opening the circuit breaker is hergelei'tet from an opening spring 130, which is in a box-shaped metal housing 135 on the outer left. End of the circuit breaker assembly 12 is brought down. This opening spring 130 is a compression spring, the upper end of which abuts against a stationary part of the housing wall, while the lower end abuts against a shoulder 132 at the lower end of a rod 134 that moves back and forth. The upper end of the rod 134 is connected to the horizontal operating rod 26 via an angle lever 136. This angle lever is rotatably fastened with one of its arms to the rod 134 of the spring arrangement and with its other end to the horizontal actuating rod 26. q_

009846/1159

BATH ORIGINAL

When the horizontal operation stall 26 to the right out of its Position according to Figure 4 "is moved to close the load switch, the opening spring 130 is compressed. Am lower end of the vertical operating rod 20 are not latch mechanisms shown in more detail provided to the horizontaln To hold the operating rod in its closed position, .which means that the load switches also remain closed and the opening spring in a compressed state remains. When this ratchet mechanism is released, the opening spring 130 can relax freely, whereby the V / arm lever 136 is driven counterclockwise and moves the horizontal operating rod to the left, causing the load switch opened almost simultaneously. - ■.

To make the total tension approximately even between the different To divide circuit breakers a Yielfachkraftschalters, it is already known to use capacitors in suitable Size to connect the switches in parallel. These capacitors can be of any suitable conventional shape, however, it is preferred to have each capacitor in the form of an array constructed from layered ceramic elements, as can be seen from US Pat. No. 3,325,708.

One of the capacitor arrangements is designated 140 in FIG. 4 and is located at a point within the tubular Isolator 30. This arrangement 140 is between two box-shaped housings 35 at opposite ends of the tubular Isolator 30 electrically connected. This capacitor arrangement is due to these connections to the circuit breaker 50 in parallel. Y / other capacitor arrangements of the same type can also be fixed in the tubular insulator 30. Capacitor arrangements of the same type are also in each of the other tubular insulators 31, 32 and 33 are provided, and lie to the yakuum circuit breakers that come with these tubular Isolators are connected accordingly, in parallel.

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009846/1169 BAD ₀ RiGfNAL

Some of these capacitor arrangements 140 are shown in FIG. Di-3 ^ ej'en overlying connections of one, each of these Capacitor assemblies are connected to the box housings 35 at opposite ends of the tubular insulator connected accordingly.

In a tubular insulator 30 a relatively modest one Size, as can be seen in Figure 2, is enough space around one centrally arranged actuating rod 26, connecting rods 38 and accommodate the capacitor assemblies 140 in that all of these components are relatively long and slim. 3s would be a much larger diameter of the tubular insulator required if the vacuum interrupter 50 were to be housed therein because of the diameter of the vacuum interrupter is relatively large. By removing the vacuum circuit breaker from this interior, the diameter of the can according to the invention tubular insulator should be limited to a reasonable size, not by the diameter of the circuit breaker is diluted.

The factor that leads to the reduced length of the load switching arrangement 12 contributes, consists in the lateral displacement of the neighboring vacuum circuit breaker. This lateral offset is permitted it, overlapping the load switch units in their longitudinal dimensions to be arranged, whereby the total length of the circuit breaker arrangement is saved. In this regard, it should be noted that the structure, ier in Figure 3 extends from the left end of the vacuum circuit breaker 50 in the longitudinal direction, the arrangement with the structure extending from the right end of the immediate bar adjacent circuit breaker 51 from overlaps. 7 / If greater length reductions are required, the degree of overlap can be increased. When the load switch units attached in a row, it would not possible to achieve any overlap to reduce the overall length of the circuit breaker assembly ..

009846/1159

ORIGINAL BATHROOM *

Another feature which contributes to reducing the length of the circuit breaker arrangement 12 is that the opening spring 130 (see FIG. 4) is arranged in its longitudinal extension almost at a right angle to the length of the circuit breaker structure. To bem 7'1-: ei: is that these üffnun _f ~ sfeder is housed in a kistenf Jr mi ge η Ge house-s 135130, carrion from the County ^ enchse the raw 'f''nnigen insulators! 30-33 extends radially outwards in approximately the same way as the other box-shaped housings 35. This right-angled assignment of the opening spring makes di- =? L ^: Inward expansion of the load arrangement in an advantageous manner almost independent of the length of the opening spring.

U: n a? Inspection or adjustment of the linkage 110 erm '\ - rliohen, each box-shaped housing 35 is provided with a large opening which is normally closed by a movable cover 150. Suitable, not closer Fasteners shown are provided to each cover hold on to their place. When the cover 150 is removed the connected linkage 110 is freely accessible.

Each load switch of the circuit breaker arrangement can be in a simple Way to be removed and replaced. Removal of the circuit breaker can be achieved by first opening the cover 150 next to the right end of the circuit breaker is removed to expose the linkage 110, then the linkage 110 and the braid 98 removed from the circuit breaker and the Nuts 76 on the fastening bolts 75 of the load switch removed. Then the conductor 95 on the left side of the circuit breaker is released from the connection 96 and the bolts 93 (see Figure 2) removed, whereby the circuit breaker together with the mounting bracket 90 and the conductor 95 completely out of the Rest of the circuit breaker assembly can be removed. An exchange of the load switch is achieved in that these parts, reconnected in roughly the reverse order. So is it is unnecessary to destroy any of the tubular insulators 30-33 or any of the structural elements fixed therein

-12- 009846/1159

BATH ORIGINAL

As can be seen, the tubular insulators 3Ό-33 form and the box-shaped housing 35 to whom they are connected through the connection; rods 38 are clamped together, a skeletal one Structure that is self-supporting and that does not rely on the 'vacuum load switch supports. Since this skeletal structure is also not supported on the other parts of the load switch arrangement or structurally forms a whole, these other parts can be removed freely and without affecting the basic structure the skeletal structure replaced v / ground. Related to the self-supporting property of the skeletal structure is that Fact that the supporting pillars 14 and 16 on the opposite Ends of the arrangement carry the skeleton independently of the load switches.

As can be seen, the circuit breaker is almost identical Building blocks in a modular construction composed. In this regard, each building block from the tubular insulators 30, the connected housing 35, the connected linkage 110, the load switch 50 and the mounting brackets 90 at the other end of the load switch will. By building blocks of the same construction of the circuit breaker arrangement can be put together according to Pigur 1 • Easily built up in circuit breakers for a higher rated voltage '.verden. Z'.var still needs to make certain changes be made to a -rö ^^ ren distance 7 / vicchen the supporting columns 14 and 16, so that the additional building blocks can be accommodated and the height of the columns 14 and 16 must be increased in order to adapt the system to the higher voltages, However, the same modules that are shown in Figure 1 can always be used for a circuit breaker higher voltage can be used.

Although in the preferred embodiment of the invention Circuit breaker assembly 12 is constructed so that it extends horizontally and at its opposite ends is supported by insulating columns, the circuit breaker according to the invention can also be arranged such that it uich

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009846/115 9

BATH ORIGINAL "

extends vertically and is supported by some insulating structure.

0 09846/1159

Claims (1)

Claims Vacuum circuit breaker characterized by the following elements: a. first, second and third tubular insulators (30,31,32,33), which are arranged almost axially, b. first, second and third vacuum load switches (50,51,52,53), associated with the first, second and third tubular insulators, respectively, c. each load switch has an evacuated housing (60), a A pair of separate contacts (62,63) within the housing and a conductive rod (68), one of which is movable Carries contact (63) and extends through one end of the evacuated housing (60), d. fasteners (90) attached to one end of each isolator (30,31,32,33) are arranged and extend laterally therefrom to a vacuum load switch (50,51,52,53) »the is connected to a given insulator laterally, aligned longitudinally with respect to the connected insulator, to fix, ©. Means (75) for securing one end of the evacuated housing (60) to its associated fastening devices, f.Means (98) to electrically connect the load switches in series switch, g.and also that neighboring vacuum circuit breakers in the series connection are arranged laterally offset to one another, i.e. a longitudinally movable actuating rod (26) which extends through the aligned tubular insulators (30,31,32,33) extends, is present and i.that a linkage (HO) connected to each load switch and the movable contact rod (68) thereof is coupled to the actuating rod (26) which is movable in the longitudinal direction, is available. 2) vacuum circuit breaker according to claim 1, characterized in that the fastening means at one end of each insulator have a housing (35) in which the linkage (HO), ₅ which is coupled to the movable contact rod (68) of the connected circuit breaker is housed, is. -2- 009846/115 9 3) vacuum switch according to claim 1, characterized in that a.das linkage (110) next to one end of a given vacuum laptop switch occupies a "certain space at one end of a given circuit breaker and that b. the load switch, which is immediately next to the given load switch is on the rod side of the same, has a structure that to the mentioned bar with respect to the longitudinal direction of the tubular insulators is arranged in an overlapping manner. ■ 1) circuit breaker according to claim 1, characterized in that ä- \ 3 electrically adjoining load switches (50,51,52,53) are arranged so as to overlap relative to one another, namely with respect to a longitudinal direction to the tubular insulators, whereby the total length the arrangement is reduced. 5) VH ^v uumleist ", m, .3; s switch according to claim 1, characterized in that? A.a opening spring (130) _{is coupled to the longitudinally movable Betfitigun c} -: t? Rod (26), wherein the opening spring (130) has a length that extends transversely to the actuating rod (26) and b.da: 3 a housing (T05) next to one of the tubular insulators (33) is arranged, which includes the opening spring, and which extends radially outward from the tubular insulator. 6) vacuum circuit breaker according to claim 1 or one of the following, characterized in that voltage-dividing capacitors (14O) to the load switches (50,51,52,53) accordingly are connected in parallel, the capacitor lying in parallel with a given circuit breaker in the tubular Is arranged insulator, which is aligned approximately longitudinally to the given circuit breaker. 7) Vacuum circuit breaker according to claim V or one of the following, characterized in that devices (38) for clamping the tubular insulators (30,31,32,33) with the 009846/1159 _BAD Fastening means (90) independent of the vacuum lay-down brackets are present, so that a solid self-supporting ukelette is formed on which the vacuum circuit breaker (50,51,52, 53) are attached, the Yakuum circuit breaker from the Skeleton can be removed independently, without the self-supporting property and without the attachment of the to influence other vacuum circuit breakers. 8) vacuum circuit breaker according to claim 1, characterized by d-a, that a.dis fastening devices on one end of each isolator a housing (35) in which the linkage (110) with the movable Kontaktr ^ tab (68) of the connected circuit breaker is coupled, is housed that b.Clamping devices (38) for covering the tubular insulators with the rods. ^ ehäusen (35) are available independently of the vacuum circuit breakers, of the kind that one feet it self-supporting skeleton is formed on which the vacuum switches are attached that c. the clamping devices have insulating connecting rods (3ö), which move through the aligned tubular insulators extend and d. that the vacuum load breaker is separated from one another from the skeleton can be removed without their self-supporting character and without the attachment of the other vacuum circuit breaker to influence. 9) vacuum circuit breaker according to claim 1, characterized in that that a.the tubular insulators (30,31,32,33) extending horizontally Have longitudinal axes that b. the switch housing (50,51,52,53) tubular elements are which have horizontally extending longitudinal axes and that c. isolated support members (14 »16) at each end of the assembly according to claim 1 for supporting the tubular insulators and the fastening elements independently of the circuit breakers available. -4- 00-9846 / 1159 ORIGINAL BATHROOM > Λ 10) vacuum! ElstungsBehält according to claim 1, characterized in that that a. each load switch has an "end cap" that covers the other its contacts (62) supports and b. that means (90) are provided for supporting the end caps on the tubular insulators, the plurality of mounting supports have, which are connected to the corresponding circuit breakers that c. the mounting supports (90) are transverse to the longitudinal axes their connected circuit breakers extend, each support at one point with the Bndkappe ■ of the connected The circuit breaker is attached and connected at a remote point to the structure of the tubular insulators. 0 0 9 8 A 6/1 1 59 'BAD ORIGINAL Blank page