DE1640183A1 - High voltage circuit breaker - Google Patents

Description

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16 446

General 31ectric Company, 1 River Road, Schenectady, N.Y., USA

High voltage circuit breaker

The invention relates to power switching devices that several, spaced apart single pole switches which are mechanically coupled to one another so that the switching operations of the individual switches can be precisely coordinated.

Power switching devices of the type of interest here several single pole switches mounted on individual pillars. These pillars are at a fairly large distance from each other arranged in order to separate the live parts sufficiently far from each other. The switching operations of the individual Switches are coordinated with each other by mechanical linkages that connect the switching linkages of the individual switches with one another associate. Because the individual pillars on which the switches are mounted, a relatively large distance from each other the connecting rods are relatively long.

With the previous switching devices of the type of interest here, a difficulty is that the coordination of the switching

061132/0721

ORIGINAL BATHROOM *

processes of the individual individual switches is made more difficult by fluctuations in the ambient temperature. Large temperature fluctuations lead to relatively large changes in length of the connecting rod, through which the linkage of the individual switches are coupled to one another. But this shifts the position of the one control linkage compared to the other control linkage, so that the positional adjustment between the two control linkages get lost.

Another difficulty with switching devices of interest here Type occurs is that the coordination of the switching operations between the individual switches by changes can be lost in the distance between the individual pillars on which the switches are mounted. This occurs, for example, if the foundations on which the pillars are mounted settle unevenly in the ground. As with such changes in distance between the individual pillars, the switching linkage of the individual switches remains coupled to one another via the connecting linkage, move the shift linkage mutually, so that each Position adjustment between the individual shift rods is lost.

The aim of the invention is therefore to provide a high-performance switching device to be set up in such a way that the coordination between the switching operations of the individual at a large distance from each other arranged switch neither by temperature changes that cause changes in length of the connecting rod, nor by changes in distance is lost between the individual switch pillars.

009832/0721

BAD ORIGINAL * ^{;; :}

1540183

An electrical high-performance switching device with two sockets, which are arranged at a certain distance from one another and open which have two individual switches that can be switched practically at the same time, each of which has a movable switch arm and a shift linkage with a pivotably mounted angle lever, by means of which the shift arm can be moved, is according to the invention characterized in that da2 to maintain the angular position of the pivotably mounted angle lever of the shift linkage against each other regardless of thermal expansion or contraction of the linkage a device is provided with a base plate that extends from one base to the other ! • calibrated on which the trunnions for the pivoted Angle levers are mounted that this base plate is rigidly attached to a base and is supported on the other base in such a way that the Base plate is movable with respect to this other base, unddaii the y-arm levers are mechanically connected via a connecting rod are so that the movement of the bell crank during a switching operation conphas.

In the following, the invention is intended in conjunction with the drawings will be described in detail.

Fig. 1 is a side section and shows schematically an embodiment according to the invention.

Fig. 2 shows schematically how the individual switches are connected, which are used in the IIochleiGtun:; switch device according to the invention.

009832/0721

* ORIGINAL BATHROOM

Fig. 3 shows an enlarged view of how certain individual parts of a Behavior high-performance switch, which is constructed according to the state of the art.

FIG. 4 is similar to FIG. 3 and shows, on an enlarged scale, how these parts behave when they are designed according to the invention.

FIG. 5 is a section taken along line 5-5 of FIG. 1.

FIG. 6 is a section showing another embodiment of FIG Invention.

In Fig. 1 a Iicchleistungsschaltgerät is shown which has two individual switches 12. and 14, each on a base 15 are mounted. Each base 15 has a solid foundation 19 made of concrete that is embedded in the soil IG. On every A metal lattice frame 18 is attached to the foundation 19. Each individual switch comprises a metal tank 20 which is at high voltage with respect to earth and is mounted on a hollow insulator column, which isolates the tank 20 from earth. Jas lower end everyone Isolator column 17 is attached to the metal lattice frame 18 of the base 15.

In one embodiment of the invention, the two individual switches 12 and 14 are the pole switches of two phases of a multiphase AC networks. Because the two phases are mutually strong

0 098 32 / G72T "'BAD ORIGINAL

Tensions must be fiddled> the decency between the single parents must be very great; the necessary security, afestand to maintain between the feeidsiai phases · »at a; Place about a "eM meters apart iloelxleistungsschaltgeFät for 5GQ IW must beispielsweisedie centers of Eiiizelselxälter ¹ 12 tindS fourteenth Since the Äufbato the selßst Sinzelse Halter not subject dex * invention is t _r wiele in 2teiclteuingen ■ items of Sciial-: ter v / reggelassen warden ^ Waen> rendi those parts of the switch ,, represented _r are shown simplified *. In the SG λ tisehen Barstellung nacEi Figure "2 eiaa- is geseigt * as' the Einzelsclaalter 12 and 14 interconnected sindi the _r. in the "Eanlcsi 2ö are arranged ^ Inside the; tank 20 are two Mnt © in each other seEialtete ixewegtsare Kontaletsc-toalter 22i and -24 arranged, - 'which the main contents of the Selialter- siiKt .. Each Eontafet shows a fes> ts »Existing contact; 25 = lind a feeiäiegjüiaren Eontakt 2v3 aa £ ^ i> he two fesffeateitenid'en I & waitakte are ⁵ to you © Mtitouiaigs> - ·

2: S momtiert * diieMnfcs; iindl recMs aus- deöt ^ anlk 2 €> fcer & tts- «iiie BTireyMtfcteiMi ^ sisölato-rea weisem M.ters: cI) iieneH <29 on _t den Stront d ^! en £ eststetoeaden ISomta & teHi 2.B zmfWfcEQm Ist «g ^ as well as IsQjliersätileni SG ^ the & te

2B wm <ä die Feststefeeraaetens feitatte 25 GegeHiilier · eggs MtetailltaBk, 2O isoliere »j vt & mm tl & jsr Eiraz. © ls © telt, eE · gßo? ££ m @ t is ^ as shown in the dter *

Each föeMeni HaiEptfeQffitaittsefemltex mm & F £ g * " % is mim stand 32, in the S © rle rait © teens ^ MeirsitaMiisseiiailtföar S4 pm & uJk & li

ßÄD OR (GINAL " ⁵

The WiderstandsselalLter 34 has a fixed Eontakt SG and a movable contact 37 on "ΐ resistor 32 ^ '"'"" / hen the Hauptkontaktsehaltern 22 and 24 parallel geschal tefe _r aa "it serves _r> the speed to steuern-""With which you see the voltage drop between the main contact clocks when the main contact switch is opened. Furthermore, the resistance regulates the size of the voltage transitions when the main contact switch closes. It is necessary that the resistance switches close in the individual phases in a time interval of 2 " millisecial text. The invention is now concerned with measures that such a precise closing rj dI these measures are now described. "

In FIG »H * Video- both ia the" einposligßsni Etezelsehaltern 12 ____ iimdl i <t _fc & zw ± phases of a Vfe®hselstromaaetzes switch ,, ideratisehe two? running stand holder 34 wbM% 4 &. shown * Each of these lid resistance sides has buckets · fixed Iiontafet SG mmü a movable contact bridge 37 ami "the d®m netem Eömtafetens in Fig;" 2 correspond to "In every scfealter there is fixed contact 3.Q- BBtfe cEems a \ ea MmdM dies tficterstaai ^ esi xe & ic- temmäem » feäer -Eetetökt 3 © sitait mrnt & lm & m pmsmmLem ts & l & t & r eter äem MoatieMt S © Gegesraöl ^ E" dem fairak 2ö eiek wem fer Seliaiter & £ Em & © is moving., Bfe 37 is ÄiltSMKEm 3S Ixelesfigt _K i @ r am eiftem feststetemdea Im fanfe 2 & is pivoted * Ik d®j? ·

BM5

Guide form sits the movable contact 37 on a rod 41 which is attached to its rear. This rod 41 goes through an opening in the contact arm. 38 through and can slide in this opening. A compression spring 42 pushes the movable contact 37 towards the other contact 36 .. However, the extent of such movement is limited by an adjustable stop at the end of the rod 4 " ^! . The current path between the movable contact 37 and the contact arm 38 is controlled by a flexible conductor produced, but which is not shown.

A compression spring 44 is provided as a closing spring in each tank 20, biasing the contact arm 38 such that the contact arm is rotatable counterclockwise to a position in which the two contacts 33 and 37 touch. This compression spring 44 engages at the upper end of a perpendicular Rod 46 made of insulating material, which is hinged to the contact arm 38. To the two Y / resistance switches 34 j and to hold 34a fully open, as shown in FIG is, there is a lock at the bottom of the right isolator column 17 5G attached. The lock-50 is used to keep the vertical running S.angen 46 against the upward pressure of the compression springs 44 in their lower position. If the lock 50 is released, however, the. Move rods 46 freely upwards. The compression springs 44 can therefore relax and "your close contacts can grow."

"■■ ,, ■. '■'" ■■ - '""·''"■" - ■■ "- -' ■ ■ -.χ-uvL ·. i * s- &'::. \ v-vu '^i; - ■ - ■ - ■■ ■ ---. to close.

BATH ORIGINAL

In order to ensure that the two contact arms 38 of the two switches 34 and 34a are moved exactly the same during the closing process, the two contact arms 38 are mechanically coupled to one another. This mechanical coupling is brought about by a connecting linkage GO, which reached at the bases of the isolator columns 17 from the individual switch 12 to the individual switch 14. The connecting linkage is connected at the left end to the switching linkage of the individual switch 12 and at the right end to the switching linkage W of the individual switch 14 »

The switching linkage of the individual switch 12 has an angle lever 62 which is pivotably attached to a stationary pin 83. One arm of the angle lever 02 is articulated to the connecting rod 60 by a pin 64. The other arm of the angle lever is at 65 _; pivotally connected to a power transmission member in the form of a universal joint 68, which in turn is attached to the lower end of the perpendicular rod 46 b. The attachment of the universal joint 68 to the lower end of the rod 46 is preferably carried out by means of a universal joint 69. A suitable guide 70 is arranged in the isolator column 17, through which the rod 46 can only move vertically up and down. .

In a somewhat abgewandteten embodiment of the invention, which is not shown _s, the universal joint 68 is omitted and has been for the rod 46 extended so that they with the

0098 3 2/072 1

BAD ORfQINAU

840183

Angle lever 62 could be connected directly through the pin 65. The perpendicular rod 46 is sq long, that small horizontal movements of the lower end of the bar no noticeable Up and down movement of the upper end of the rod induce © n »Independent ~ · depending on whether a universal joint is used or not, the power transmission link that is mounted on the bell crank 62 is is fixed in such a way that its upper end describes a path can when the pin 63 due to thermal changes in length the base plate 80 is displaced perpendicular to the displacement direction of the pin 63 is.

The switching linkage of the single-pole switch 14 largely corresponds to the switching linkage for the single-pole single switch 12. The corresponding individual parts of the two switching linkages are therefore provided with the same reference numerals. The angle lever 62 on the right switch in FIG. 1 differs from the Y / inleL lever 62 on the left switch in FIG. 1 in that its lower lever arm has an extension to which a locking roller 72 is attached. When the high-performance switch is open, as shown in FIG. 1, the locking lever 50 cooperates with the locking roller 72 in such a way that the angle lever 62 cannot be pivoted clockwise by the pressure of the closing springs 44.

00983 2/0721
BAD ORIGtNAL

ί 640183

-ιο The locking lever 50 is pivotably mounted on a stationary pin 75. It is also biased into the locked position by a spring 76. In order to release the lock, a lifting magnet is provided, which is shown schematically at "78". When the magnet is excited, it attracts its armature and thereby pivots the locking lever clockwise so that the locking lever 50 releases the locking roller 72 on the arm lever 62. Now the closing springs 44 can take effect, which press the contact arms 38 into the closed switch position.

To ensure that the movable contacts 37 are fixed Contacts 36 touch practically at the same moment, the contacts 37 are provided with the stops 42, which have already been mentioned became. If you adjust these stops 42 correctly in the open state of the switch, you can adjust the distance between the Contacts 30 and 37 in the open state of the switch and thus change the time at which the contacts 37 and 36 close the switches attack each other.

A difficulty that occurs here with high-performance switchgear type described occurs, is that the adjustment between the contacts 37 -can get lost if fluctuations occur in the ambient temperature. Such thermally induced Changes in length are particularly important in the case of the connecting rod 60 noticeable because the linkage is relatively long. Suppose the two tenons 63 for the two

009832

\ ϊ angle levers 62 are fixedly mounted _o Then a change in length of the connecting linkage 60 leads to a noticeable rotation of the left angle lever 62 _S while the right angle lever 62 remains unchanged in its locked position. But if the left angle lever 62 rotates, the position of the contact arm 38 is also in the. left -single switch 12 noticeably changed.,

This behavior is shown in. The Figo 3, bei'der adopted., That the distance between the two 'cones remains constant 63 of the angle lever 62, while the linkage 60 * the size "D" undergoes a thermally induced, "ängenzuwaehs < , By this Längenzuw & chs der'Winkelhebel 62 is hineingeschwenktj in the position shown in phantom "this is lifted the force-transferring member" 63 and the shift rod 46 "by a distance" ^{e! S} "-Dadurch but the pre-adjusted distance between the KoatÄteR 37 and markedly reduced 36th If now the switch wirdg closed- so the contact 37 in the -left Einzelsehalter 12 reaches its closed position significantly earlier than the contact 37 in the right single switch 14, so that the exact pre-adjustment is lost _{p is} the same for achieving Sehaltzeitpunkte performed became·

To prevent now, that the switch rod 46 in the left switch is pushed up significantly when the connecting rod 60 expands thermally, the pin 63 is now for the

009832/0721

Angle lever 62 of the left switch 12 is mounted such that it is displaced practically by the same amount undfin the same direction when the length of the connecting rod 30 changes. The relationships that then result are shown in FIG. Here the pin 63 is shifted to the left by a distance "F", which roughly corresponds to the position of ^{the connecting rod 60 '5} D ". As a result, the force-transmitting member or the joint 69 is raised by a distance * -'E", which is substantially is smaller than the distance "K" of Fig. 3 and can be neglected _o This means that despite a change in length of the linkage the angular position of the two angle levers 62 remains practically against each other will receive 60.

In order to compensate for the thermally induced change in length of the connecting rod 60 the pin 63 by the distance "F" to be able to move from Fig. 4 ^ are the two Zj ^ afen 63 for the two angle levers 62 mounted on a common base plate, made of the same Wäakel material as the connecting rods 60 is made. In a preferred embodiment of the invention, the base plate 80 and the linkage are 60 made of steel. The base plate SO is on the two Lattice works 18 supported, which the two individual switches 12 and wear. However, the base plate 80 is rigidly attached to the right lattice work 18, while it slides on the left lattice work 18 is mounted so that it is opposite the left latticework can move smoothly. Since now the base plate 80 from the

= ■■ 0098 3 2/0721

♦ '. BAD OBiGlNAl.

the same material as the connecting rods GO is, a vox-given temperature change invokes both the Baseplate SO and the connecting rod 60 show approximately the same change in length in terms of size and sign.

The sliding bracket of the base plate 80 on the left lattice frame 18 from Fig. 1 can be carried out in any way ./eise. In the embodiment presented here is the left lattice frame 13 is provided with anex opening 82 in which the base plate slide can. This enables the base plate 80 to slide back and forth within the opening 82 when the base plate is due to temperature fluctuations become longer or shorter «The vertical standing walls of the opening 32, which the base plate tightly surround, guide the base plate 80 when it changes its length. At the other end is the base plate with the right lattice frame 18 rigidly connected. For this purpose, in the embodiment according to Fig. Bolts 84 are used, which are from above through the grid frame 18 and pass through the base plate 80 and press these two parts together. The base plate can have any cross-section. It turned out to be cheap to have the Forms the base plate as a hollow Eechteckrohr that the connecting rod completely surrounds. (Fig. 5).

It should be noted that the length of the shift rods 46 at Temperature fluctuations also change something. These lengths- '

BAD ORiGtNAL

However, change affects the mutual position of the contact arms 38 to each other, because the two shift rods are of the same length and made of the same material. On temperature fluctuations therefore change the lengths of the shift rods 46 in the same way, so that the contact arms 38 about the same Amount can be swiveled.

As already mentioned, a further aim of the invention is to maintain the coordination between the individual switches installed at a distance from one another even if the distance between the foundations ± 1 for the individual switches of the switching device changes. This distance between the foundations of the individual switches can change, for example, if the foundations are unevenly set in the ground. . Frost in the ground 16 can also lead to such changes in distance. When the pins 63 of the two angle levers 62 are rigidly mounted on the foundations 15 or on the lattice frame 18, every displacement of the fundamentals 15, which leads to a change in the distance between the foundations, causes the angle lever 62 on the left individual switch 12 to pivot. In the arrangement according to the invention, the left angled lever 62 does not pivot vex ^ when the distance between the two foundations changes, since the left foundation 15 can move relative to the x * real foundation without affecting the distance between the two pins 63 'd. This is because, due to the sliding bracket at "82 ¹¹ in the left grid frame, the left foundation can be moved without

S8

BATH ORIGINAL

= 15-

the distance between the two pins 63 is influenced. There the distance between the two pins 63 and also the length of the Connecting rods SO then remain unchanged, can be mutual Displacement of the foundations 15 does not change the mutual angular position of the two angle levers 82. The change in distance between the two foundations - thus calling the highest one negligible change in the position of the two switch arms 38 of the 'two individual holders 12 and 14',. ''

The invention has been explained in its application, a high-performance switch with two individual switches 12 and 14. But it can do just as well on high-performance switching devices with more than as- two Kinzelseaaiterp. applied "" in FIG. 6 is for example a high-performance switching device for three phases ^ that is shown with three island holders. Ser additional single switch

is * -" " '

for the third phase marked 90 »Ber Einaelschalter for the third phase is denoted by 90. The single switch 90 is arranged to the right of the 'individual holder 14 * so that the individual switch 14 is the middle single switch. The third single switch 90 is constructed exactly like the individual holder 12 in FIG. He has a largely matching "shift linkage" with a Angle lever 'S2, which is connected to the angle lever 62 of the central individual switch 14 via a connecting rod 60a, the the connecting rod 60 from Fig. 1 is similar., The connecting rod öOa is expediently on an extension 100 of the

middle angle lever 62 pivotable by means of a pin 101 angelenltt.

009832/0721.

BAD ORIGINAt

Applying the invention to such three-phase switches, the base plate 80 is up to the foundation 15 of the third individual switch 90 extended and held there in a sliding manner, as shown at "82".

The pin for the angle lever 62 of the third individual switch 90 is rigidly attached to the base plate so that it is pushed back and forth when the base plate changes length due to temperature fluctuations. This makes the influence thermal conditional changes in length of the connecting rod 60a compensated in the same way as it is with reference to the Flg. 1 already was explained.

009832/0721

Claims (4)

Expectations 1. High-performance switching device with two bases which are arranged at a certain distance from one another and on which two individual switches are mounted that can be switched practically at the same time, each of which has a movable switching arm and a switching linkage with a pivoted angle lever through which the switching arm is movable, characterized in that to maintain the angular position ™ of the pivoted angle lever of the shift linkage against each other regardless of the thermal expansion or contraction of the linkage, a device with a Gnndplatte is provided, which extends from one base to the other on which the pivot pin for the pivotably mounted angle levers are mounted that this base plate is rigidly attached to a base and is held on the other base in such a way that the base plate can be moved relative to this other base, and that the angle lever is mechanically connected to one another via a connecting linkage ( ve are rbunden, so that the movement of the angle lever runs together during the switching process. 2. High-performance switching device according to claim 1, d a d ur c h characterized in that the base plate and the connecting rod are made of materials with the same thermal expansion coefficient, so that with a given 0 0 9832/0721 given temperature change the change in length of the base plate between the pins for the pivoted angle lever is equal to the change in length of the connecting rod. 3. High-voltage circuit breaker according to claim 1 or 2, characterized in that the shift linkage of that single switch on whose foundation the Base plate is movably supported, has a force-transmitting element, one end of which is pivotably mounted on the Angle lever is articulated, and the other end of which is mounted such that there is a movement of the pin for the pivotable stored. Angle lever due to thermally induced changes in length the base plate is movable in a direction which is perpendicular to the direction of movement of the pin. 4. High-voltage circuit breaker according to claim 1, 2 or 3, characterized in that the individual switches Have main current contacts, to which further switching contacts are connected in parallel, which are in series with a resistor are switched, and that the shift linkage for the in series with the switching contacts lying next to the resistance through the angle lever. are to be operated. . . 009832/0721