DE1615021A1 - Circuit breaker - Google Patents

Description

Dr. Expl

Westingiiouse

Electric Corporation 11 YEAR 1966

Pittsburgh ..'-: '

66/8003

Circuit breaker

claimed.

The invention relates to conductor holders with magnetic. Triggers! Ttein.

An object of the invention is to provide a circuit breaker with ver to provide better means for a rapid elimination.

Another object of the invention is s to provide a having a releasable by a magnet Aniceranoranung, the mm tripping the switch is used, means being provided for returning the armature in the switch-off movement. 00SS25 / J) SD7; ■

jt WE-Case 36 371 -

Another keel of the invention is a circuit breaker to create the oine release mechanism with good adjustment. possibilities unifasst. -

The invention is described below in terms of structure and mode of operation explained on the basis of the following description in connection with the drawings. Isi

Figure 1 is a side view of a pole of a three-pole high-voltage switch according to the invention;

FIG. 2 shows a section through one of the interruption points according to FIG. Figure 1, with the contact pieces in the switched-on position are drawn;

Figure 3 is a simplified schematic representation of the drive lever the switch-on system and the switch-off system the one pole unit according to the invention;

FIG. 4 shows a side view of a release system according to the invention, with individual parts for the sake of clarity are drawn broken out;

Figure 5 is a section along the line V-V according to Figure 4-

Figure 6 is a side view of the magnetic pawl assembly according to Figures 4 and 5, with individual parts broken out are drawn;

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Figure 7 is a perspective view of the carrying and Adjusting means according to Figures 4 and 5;

Figure 8 is a perspective view of one of the support plates according to Figures 4 and 5 »

FIG. 9 is a partial section showing individual parts of the armature support α.

The .Figuren 10 "and 11 are schematic partial views, the the positions of individual parts "can be recognized during the switch-off process *

In FIG. 1, a high-voltage pressure gas switch for three-phase networks is shown, which is designated as a whole by 10. The three poles are all the same with the exception of the electrical control lines running between the poles and the gas and air lines. A control housing, which contains the common parts of the air and gas systems, is only attached to the central pole. In Figure 1, only one pole "A ^{11 of} the switch can be seen.

Each pole of the switch is attached to a support frame 12, which consists of longitudinal beams 14 and stiffeners 16 and rests on feet 17. There is a high pressure container at each pole 18 is provided, which is supported by frame 12. Irei "Supply lines, not shown, extend from the

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High-pressure container 18 through the three vertical hollow insulators * into three auxiliary containers 24. The auxiliary containers, of which only the one can be seen in Figure 2 have high voltage potential.

A current transformer 26 belongs to each pole. The current transformer can, for example, be designed as in the American one U.S. Patent 2,504,647.

A metallic housing 28 is attached to each hollow insulator 22, the high voltage potential leads. Two extinguishing devices 30 connected in series are arranged in each housing 28 (Figure 2). They include two spaced-apart fixed earth contact pieces 32 and a bridge contact piece 34 with two movable ones Switching pieces 36, only one of which can be seen in FIG. The bridge switch 34 is rotatable on a shaft 37 attached. For switching, the bridge contact 34 is rotated so that the movable contact 36 in.and out of engagement get with the stationary contact pieces 32. In every pole are the fixed contact pieces arranged at a distance 32 of the three housings 28 are electrically connected in series so that there are six holding points, two in each case in one housing 28.

As shown schematically in Figure 3, each pole is provided with a drive 38, to which a trip system 40 and a Switch-on arrangement 42 belong. The switch-on arrangement 42 forms

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not part of the invention. It can work either hydraulically, pneumatically or with magnetic drives. In the exemplary embodiment, it is shown as a pneumatic drive with a piston 44 which is arranged to move back and forth in a drive cylinder. A container 4S supplies the required high pressure gas, for example compressed air, via a valve 50 into the cylinder 46 in order to obtain a downward switching-on movement of the piston 44, by means of which a drive rod 52 is moved downward. The movement of the drive rod 52 rotates a drive lever 54 in the clockwise direction (FIG. 3) about a pivot point 56. As a result, the contact pieces of the three housings 28 are closed at the same time. In addition, the rotation results in the drive lever 54 in the clockwise direction via the connection piece 58, a rotation of a lever arm 60 clockwise about a pivot point 62. An elongate drive rod 64 is of the held one end of the lever arm 60 by a bolt 66 at one end. The other end of the rod 64 is arranged in an opening in a suitable support plate 68 for the purpose of a substantially horizontal movement. The rod 70 is held at the other end in an essentially horizontal day within an opening of a suitable support plate 74. At the outer ends of the drive rods 64 and 70 springs 78 and 78 are provided in order to put the drive rods 64, 70 under bias in the disengaging direction. The horizontal support rods 64? 70 are at 82, 84 and 86 with three lever arms 08, £ 0-

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and 92 hingedly connected to three horizontal shafts 94, 96 and 98 attached aind. The shafts 94, 96 and 98 are rotatable bare parts which protrude gas-tight into the lower part of the three hollow insulators 22 (FIG. 1). With each of the lever arms 88, A separate shock absorber assembly 104 is connected to 90 and 92 (Figure 3).

There are three drive levers on drive shafts 94, 96 and 98 108, 110 and 112 fastened within the hollow insulators 22. They are articulated with three further drive rods 116, 118 and 120 made of insulating material. Each of these made of insulating material existing rods extends upward in a hollow isolator 22. There are metallic fits 122 at the top ends attached (Figure 2). There the rods are connected to the associated bridge switch pieces 34 via a drive device 126, which includes a torsion bar 128 and a lever assembly.

To switch on the switch, push button PE1 (Figure 3) actuated so that the switch-on coil CS opens the valve 50. Through this High pressure gas passes through valve 50 into cylinder 46 and drives piston 44 with the rod down to the on position. This movement actuated Via members 54, 58, 60, 64, 88, 90, 92, 108, 110 and 112 the rods 116, 118 and 120 down into the closing position. £.

In each of the housings 28, the rod 116, 118 or 120 operates during the switch-on movement via the arrangement 126 (FIG. 2)

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movable bridge contact pieces 34 'so that the movable Switching pieces 32 get into the switched-on position. In feathers of the The torsion spring 128 is tensioned at the same time in the housing. the three bridge contact pieces 34 of pole A are in the Einachaltstellung held by a latch 40 (Pig. 3) which engages the lever arm 54 in the on position. The latch 40 is explained in more detail below.

To obtain the disconnection movement of pole A, the latching is carried out 40 solved, as will be described in more detail later. This releases the lever 54 so that the three torsion bars are tensioned 128 (Fig. 2) of the housing 28 (Fig. 1) and the switching spring 76, 78 (Fig. 3) cooperate in order to bring the bridge contact pieces 34 (Fig. 2) into the switched-off position and the drive rods 52 to move the piston 44 (Hg. 3) back into the switch-off position so that a switch-on is prepared =

Since every movable bridge contact is in the switch-off position is moved, an arc is drawn between the two contact pieces 32 and 36. These arcs will be with With the help of a suitable extinguishing agent extinguished from the associated high pressure accumulator 24 through the hollow arms of the bridge switch 34 flows.

The switch 10 comprises three poles which are designed similarly to the id A are. The poles are electrically locked so that simultaneous actuation takes place. The switch-off and

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The switch-on movement is described in the aforementioned patent * events explained in more detail «

Like in Pig. 3 shown, the pawl 40 is operated so that the Lever 54 is released. It does this by energizing the AUG release coil! PC, either through the action of a release relay IR or with the help of the manually operated pressure button PB 2 »The trip relay TR can, for example, automatically energized via a current transformer CI, which is dependent on of overcurrents on the switch line 41 works ur.d the trigger relay TR to respond.

The latch 40 is discussed in detail below with reference to FIGS. 4 to 12. As FIGS. 4 and 5 show, two support plates 136 and 138 are fastened to a base plate 140 with the aid of screws 142. The lever 54 is provided with a recess 146 (FIG. 4), which has a substantially rectangular cross-section, a bearing pin 148 is wedged in the recess, which has a central part with a likewise rectangular cross-section and is provided with two bearing journals 152. (Fig. 5) · The lever 54 is rotatably mounted with the bearing journals in suitable recesses in the side plates 136, 138. A lever arm 154 belongs to the lever 54, at the outer end of which a roller blind 156 is rotatably attached. The lever 154 is fixed in the closed position with a dead center pawl 158. This includes a double-armed lever 160 that rides on a fixed bearing pin 162 . The a · Htbtlarra (S tut ecm)

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is designed as a knee joint and is composed of two parts, of which part 164 with the lever i6Ö over a knee joint pin 166 is connected.

As can be seen in FIG. 5, the trunnion 162 is rotatably supported in suitable openings in the side plates 136 and 138. , It is provided with an extension 170 that extends outwards of side plates 138 extends. An anchor arm 172 (I "fig. 4) is firmly connected to the extension 170 (Fig. 5) ° The anchor arm 172 carries an armature 176 which is part of an electromagnet designated as a whole as 178.

As shown in Fig. 9, the Ankerarra is provided with an aperture 180 172 SiCN at both ends extended "The opening 180 is circular over the entire length in cross-section, the circles are at the enlarged ends greater than" in dex center A Support bolt 182 is guided through the openings in spaced-apart extensions of the anchor 176 and through the opening 180 »It connects the anchor 176 with the anchor ring 172ο The anchor is therefore attached so that it can rotate in the plane of the drawing in Fig. 4» Because of the widened parts of the opening 180, the armature 176 can also be rotated or r / ackcln in the marker lever, e of FIG. 9. This attachment ensures limited freedom of movement of the anchor 176 on the anchor arm 172 in all directions. ". *." ^:

In addition to the armature 176, the magnet 178 also includes an im weaentli- '

chen Ü ~ förntigor Magnetkeaia Ιβέ ί'ίί ^ οΑδ ^ fii% 6) and a perma-

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nentmagnet 188o The U-shaped magnetic core 186 comprises a base plate 190 and two poles 192 »which are carried by the base plate 190, but through a thin layer of magnetic material 194- are separated. Each of the poles 192 is connected to an im substantially flat pole face 196 provided (Pig. 6), against the the armature 176 rests in the switched-on position. The movable attachment of the armature 176 to the armature arm 172 allows one smooth seating of the flat surface of the anchor on the flat surface 196 of poles 192. U-shaped magnetic core 186 is attached to side plate 138 as will be described in more detail later. The poles 192, the base plate 190 and the armature 176 are made of a suitable soft magnetic material, 2.B. Soft iron, ■ manufactured ο

From Fig. 6 it can be seen that in the event that the armature 176 assumes the switch-off position, the magnetic flux generated by the permanent magnet 188 leads through a magnetic circuit, the except the magnet 188 comprises the lower portions of the poles 192 and the base plate 190. When the armature 176 is in the position shown in FIG Position is moved in which he is on the pole faces of the U-shaped magnet 186 is applied, there is a path between the poles 192 is present, which has a smaller resistance because in the lower magnetic circuit of column 194 (Fig. 6) results in a large magnetic resistance. The magnetic flux therefore changes from the. ^ ntar magnetic circuit. to an upper magnetic circuit the permanent magnet 188 »the upper parts of the poles 192 and the -

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Anchor 176 includes. If the parts are in the Pig. 4, approximately 90 # or more of the magnetic flux generated by the magnet 188 will help hold the armature 17-6 in the holding position so that the latch 158 is held in the locking position shown in FIG.

The switch is activated by briefly energizing the release coil TC or by the push button PB 2 (Pig * 3) or by the Excitation of the tripping relay TR when an overcurrent occurs tripped on line L 1, which excites the current transformer CT and actuates the trip relay. When the trigger coil TC is excited, the magnetic forces generated by current through the coil ■ result in a counter magnetization with respect to the magnetic flux in the upper magnetic circuit (Fig. 4) then becomes the magnetic flux from the upper magnetic circuit to the lower magnetic circuit transferred so that the armature 176 is released.

When-the armature 176 is released, actuates the force of the cocked Torsion bar 128 in Fig. 2 and the tensioned Auseschaltfeder 76, 78 in Fig. 3 the circuit breaker in the opening direction. As shown in Fig. 4, the force that tries to rotate the lever 54 counterclockwise acts at the same time so that with respect to the hinge 166 a rotation of the part 164 clockwise is obtained. However, this movement is caused by the contact between the stop 202 on part 164 and a Stop part 204 on the lever "160 prevents. The force that the

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Triebshebol 54 wants to rotate counterclockwise, acts * therefore via the joint 164 | in the extended position 160 and the extension 170 (Fig. 5) so that a bias counter clockwise. This biasing force acts on anchor arm 172 and. tries to lift the anchor 176. So long the armature 176 remains in the switched-on position shown in FIG. 4, the circuit breaker is held in the switched-on position. When releasing the armature 176, however, the force that wants to rotate the lever 54 counterclockwise, which in the Turn the articulated lever 164, 160 in the extended position with the anchor arm 172 counterclockwise (FIG. 4). This will make the Armature 176 lifted from the U-shaped magnet 186. This trigger movement starts quite easily because of the roller-shaped contact between the EoIIg 156 and the pawl part 164. While this a. During the initial part of the release movement, the joint links rotate 164, 160 and 172 as a whole into the position shown in FIG. The armature 176 is in it from the U-shaped magnet device 186 separated. During the release movement of the joint links 164, 160 and 172 together with the anchor 176 the joint members 164, 160 and the lever 54 a position in which is the force turning the lever 54 counterclockwise, the collapse of the hinge parts 164 »160 about the hinge point 166, contrary to Vo3Q), a compression spring 210 results, which between the joint member 1G4 and the fixed supports 212 is arranged. The joint 164 »160 collapses when the line of action of the force which exsiiffi the lever 154 counter to the clockwise direction turns, iibea? an Itiiiiis iteauai, the gwischta ae »Touchur4e-

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point of the roller blind 156 and the part 164 and the center of the Knee joint 166 is to be pulled. When the joint 164 »160 collapses, The roller 156 moves on an upper hedge surface 216 of the joint member 164 (Pig. 11), and the spring 210, which acts on the hinge member 164, presses the hinge pin 166 clockwise around the hinge 162. This movement kocrnt comes about because the roller 156 touches the cam surface 216 during movement counterclockwise, which the lever 164 tends to execute around the pivot point 166, and because the parts 160, 164 are connected so that they pivot against each other carry out. The spring 210 is free to move around the pivot pin 166 and lever 160 in a clockwise direction Rotate bolt 162. The lever 160 * the pivot point 162, the anchor lever 172 and the anchor 176 rotate as a whole around the Golf point 162. This action of spring 210 guides the anchor 176 into the position shown in FIG. 11.

As previously described, the magnetic flux is, as soon as the armature 176 is again placed against the pole surface 196 of the poles 192, automatically transferred to the Kreio via the anchor. 176 Ir causes the anchor 176 to be fixed in the tightened position. .

When the joint 164 and 160, "together" and the anchor "in.", The attracted position, naph | ^l .i ^ v ^ '.. |, / jeu ^ ti_0lc ^ e8tell _> i :. _: ., I0t »can_ the lever 54, in the counterparty violin ^ lnn in-4; U; AueschaXtstf llung _{.; 1 x}

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after. Pig. 12 move freely. In the case of this ¹ movement, the roller 156 runs on the cam surface 216. When the lever 54 is pulled out into the switch-off position according to Pig. 12, the three Brückonschaltötücke 34 (Pig x 2) of the three housing 28 moves the integral Polein- ¹ Λ (Pig. 1) at the same time in the Ausschaltatellung. The switch can then be switched on again, as previously described. The three poles are locked so that they are triggered and switched on at the same time.

When the circuit breaker is operated, make sure it is in the described Way switches on, the lever 54 moves along the cam surface 216 (Pig. 12) of the articulated lever 164 in the on, switching position. In the vicinity of the end position of this Einaltbev-egurg the roller 156 runs off the loop surface 216. Thereupon the peder 210 pushes the articulated lever 164 clockwise the knee joint pivot point 166. This causes the joint lever to snap into the latching position according to Pig * 4 reset When the pawl lever 164 is reset, the lever 54 is latched, and the movable contact 34 (Pig. 2) of the three switch housings 28 of the pole unit A is locked in the switched-on position. As previously described, the switch-off springs 76, 78 (Pig. 3) and the Sorsionsstab 128 (* Pig. 2) charged when the poles are switched on.

The U-shaped magnet device 186 of the electromagnetic Device 178 is on the side wall 138 with a 2rageinrichturg attached, which is designated as a whole with 220. . {Figures 4 and 5) ·

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Four screws 222 extend through four openings 224 in the side wall 138. They run through suitable openings in an upper support plate 226, through openings in a, first support plate 228 (FIG; 8), through openings in the two poles .192 and through Openings in a second support plate 228. Nuts 230 ( Figure 5) are attached to the outer threaded ends of the screws 222 to secure the U-shaped magnet assembly 186, support plates 228 and top support plate 226 to side wall 118 Openings in portions 228, 186, 226 tightly seat bolts 222, and opening 224 includes a slot extending in the vertical direction, as will be further described later. Washers 234 (FIG. 5) are arranged between the screw heads and the support plate 138. In addition to the upper support plates 228, lower support plates 238 are provided on opposite sides of the TJ-shaped magnet assembly. The lower support plates 238 are with the TF förmi- gen Hagneteinrichtung 186 connected with rivets 240th As can be seen in Figures 4, 5 and 8, the plates 228, 238 have protrusions that receive bolts 242 that hold these parts together.

In addition to the upper support plate 226, a lower support plate 246 is provided, which is on a flat surface 247 of the lower Carrier 140 rests. Through openings 248 in upper support plate 226 and extend through openings 249 in lower support plate 246 screws 248 that secure these parts together

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are »The screws 248 are in suitable threaded holes of the Support plate 140 screwed in.

The jack system 40 can be adjusted by adjusting the carrier. As can be seen in FIG. 7, the lower door plate 246 is provided with a flat wedge surface 250, while the upper support plate 226 has a flat wedge surface 252. The coil surfaces 250, 252 touch one another along an inclined plane v / ie in Pig. 4 is inclined when the parts are fastened in the operating position. If the latch system 40 is to be adjusted in order to set the relative closed positions of the articulated lever 164 and the roller 156, the screws 248 and the nuts 230 on the screws 222 are loosened. An adjusting screw 256 (FIG. 4) can then be actuated so that the pawl arrangement is adjusted. The set screw 256 is received in a blind hole in a screw carrier 258 which is fastened to the carrier 140 with screws 260. The screw 256 is rotated so that the lower support plate 1A 6 moves on the flat support surface 247 in the horizontal direction (FIG. 4) ehtv / eder in the direction of the screw carrier 258 or away from it. \ The Schratte 256 is loosely fitted in an opening 261. It is provided with an end piece, is grooved dao at 264th After the screw 256 is inserted into the opening 261, a pin 266 (FIGS. 4 and 5) is tapped into an opening in the lower bracket 246. The pin 266 engages in the groove 264 to connect the screw 256 and the plate 246 so that they move back and forth in a straight line in the horizontal direction (FIG. 4) while the

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Screw. 256 can rotate with respect to the disk 246 "Da rotates the lower support plate 246 with respect to the upper support plate 226 moved, the wedge surfaces 250 »252 cooperate, and the upper Pederträger 22.6 is moved in the vertical direction. .Therefore-move The screws 222 and the U-shaped magnetic device 186 also move in the vertical direction. The .Sehrauben 222 that'in. Openings of parts 226, 228 and .186 are tight for. a rectilinear vertical movement, in, in, the slots 224. stressed. " So the screws. 222, and the ,, file 226, - 228 · and 186 is moved in the vertical direction when the carrier 246 is moved in the horizontal direction .. -. . ... .

When the vertical direction of the U-shaped magnet device 166 is adjusted, the armature 176 moves with it, with the parts 172, 160 and 164 being rotated about the bolt 1.62. This movement moves the relative position DES articulated lever I64 and the roller 156, this results in an effective adjustment of the flow of movement * .insbesondere the rolling movement of the latch between the roller 156 un ^c d the lever 164 · Thus, the latch 40 thereby set effective that the..Trcgeir.-direction 220 is adjusted: is-. . .. ■; · ■; .- · "- ,.

From the foregoing it can be seen that the invention provides a circuit breaker that der.eine improved Verklin-. kung your 'realization very fast. He has switch- off movements for the switch. Di0 'latching; includes a magic ■ device and an anchor connected with dieBör ^ l ^ sliar

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Connection is made via .a magnetic flux, which is effective in a. ; z '-' direction connected, which is in the "VerklinkungseinschaltsteiLuriguiacV '" of the switch in the extended position, so that forces are transmitted. This support joint device holds a lever which in turn fixes the switch in the on position. When the anchor is loosened, either by hand or with a release. Via a protective relay, the support joint moves in the extended position together with the armature in a release position. After the initial joint movement of the support joint, during which the armature moves away from the magnet and the release lever has begun its way into the switch-off position, the support joint collapses, so that the spring immediately engages the armature and the one part of the collapsed support joint the hearing returns. This reset takes place before the release lever has moved into its end position: This results in a very fast return of the armature when the circuit breaker triggers. When the release lever moves into the switch-off position, it runs along a corner surface of a lever of the support joint. In the deformed position, said one joint member is automatically "pulled back" so that the entire support joint returns to the initial support position, in which forces can be transmitted. With this effect, only one joint member is reset, part of the anchor and the other part of the joint already at the release stage

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of the shoulder has been reset. Eo aind further improved means for supporting the Magneteinriehtung and _r to the latch SET lung "is provided so that the engagement can be adjusted between the latch and your ratchet lever.

12 figures
5 claims

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Claims (5)

to WE-Case 36 371 Claims Ί. control switch with a mainspring driven by a magnetically releasable. 0 support joint is latched, marked by a double-arraigen lever (160) which is attached to an arm (172) (Armature arm) carries the armature (176) of a blocking magnet (178) and with the other arm (support arm) a "member (54) which is under the action of the drive spring (128) is supported" 2. Circuit breaker according to claim 1, characterized in that derStützarra aus.zwei hinged together Parts (160, 164) consists, in the locked position, an over-center position in the beotimmte by a stop (202, 204) Closeness to the posture " 3c! Circuit breaker according to Claim 2, characterized by a spring (210) which presses the file (160, 164) into the over-center position. '".' ■ '. ■■"' ■ -. "■ - ■■■■■ - ■: · ■ 4. Circuit breaker according to claim 3, characterized in that that the spring (2iö) the armature arm (172) against the Sperrengnct (178) presses. 5. Flat circuit breaker claim 1, characterized in that that the blocking magnet (178) with the help of an inclined plane (250, 252) in eye on the anchor arm (172) einotellbav iet. ti Blank page