DE2130509A1 - Diverter switch for step switches of regulating transformers - Google Patents

Description

Diverter switch for step switches of regulating transformers

The invention relates to a diverter switch for tap changers of regulating transformers with a contact system arranged in a frame and consisting of three levels, wherein one level is designed as a resistance switching level, one as a pre-contact level and the third as the main contact level, and with at least two contact pieces and two fixed to the outer frame parts per level swiveling ones on the inside carrying the movable contact pieces Contact carriers are provided o

Such diverter switches have so far been equipped with kinematics “which have one or more knee joints. Each contact carrier can be pivoted about its own axis »and the one between the contact carriers Knee joints are designed so that, depending on the location of the either the one or the other contact carrier with his or her directly acting energy storage device on the knee joint movable contact piece on the fixed mating contact piece to the system (OE-PS 176 265) ο Such a structure is space-consuming and requires kinematics that interact directly with the contact carriers, dofcu the Kinematics intervenes in the contact system, so that a clear There is no separation between the drive part and the contact system is possible, which leads to difficulties in particular when multi-pole diverter switches are to be operated by means of only one drive »Since the contact carriers with their

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20985270470 original inspected

Pivot axes also lie apart is the common one Difficult to conduct current «

The invention is based on the object of improving the diverter switch of the type mentioned further to νβ ~ τ, with a simple kinematics that enables a clear separation of the drive part from the contact system, so that z _o B »also multi-pole devices or high-current devices with several parallel contact carriers can be created ₉ without the kinematics having _{to be fundamentally changed for this 9} and with a simple current conduction _9, in particular for the neutral point derivation, is sought «

This object is inventively achieved in that at P the diverter switch of the type mentioned in the contact carrier are all pivotable about one and the same pivot axis and ₉ are actuated by means of a common drive shaft which is jewells passed between the two contact carriers dner plane ₉ wherein the drive shaft in each level has a double-armed drive lever that is resiliently supported on the two contact carriers, and that the two contact carriers of the main contact level as well as the two contact carriers of the pre-contact level are rigidly connected and between them each form an inner curve that controls the switching sequence »in which the associated double-armed at right angles trained drive lever engages fc, and that the two contact carriers of the resistance switching plane are expandable and each contact carrier has a curve on its inside which causes the expansion ₉ on which the associated elongated double-armed ant friction lever slides along. In such a diverter switch, the neutral point lead of all three planes in the vicinity of the pivot axis can advantageously be connected to the contact carrier in such a way that it runs approximately parallel to the pivot axis.

209852/0470

The advantages achieved with the invention are in particular that a space-saving design is achieved with simply constructed kinematics, which enables a clear separation between the drive part and the contact system, whereby multi-pole diverter switches can also be assembled without a change in the kinematics being necessary for this purpose diverter switch, only the drive shaft needs extended to ₉ which however completely unproblematic ISTJ because the drive shaft is located in each case between the two contact carriers a contact plane and thus further construction parts not into the enclosure _o D _e h _o is also used in multi-pole changeover switches it comes with only a bottom and Cover plate made of _D The individual current path parts of the individual switching levels can be used in line-up mounting. The actuation by means of the drive shaft is very simple because of the drive lever that is resiliently supported on the contact carriers and the shape of the curve n the desired switching sequence can be easily produced on the contact carriers by appropriately designing the curve shapes. In order to shorten the time of the switching process, it is possible here to actuate the drive shaft abruptly by means of an energy storage device, whereby the required rapid actuation of the contact pieces is achieved Even a possible contact erosion does not lead to malfunctions »The curve shapes on the contact carriers and the double-armed drive levers formed at right angles on the pre-contacts and the permanent contacts and the double-armed drive levers arranged at an extended angle on the resistance contacts enable practically bounce-free movement of the movable contact pieces below Use of a switching angle on the drive shaft of only 90 ° _o With the drive lever, the force on one arm goes back to zero _y while it is on the other. Arm up to the level of the

209852/0470

required contact force increases _o '

An embodiment of the invention is in the drawing and is described in more detail below demonstrate

Figo 1 shows the three levels of the projected side by side

Contact system of the new diverter switch _{s FIg 0} 2 and 3 the same arrangement as Figo 1 but in

different. Phases of the load switching process; FIG. 4 shows a front view and FIG
Fig ₀ 5 is a side view of the new diverter switch "

As can be seen from the figures, the contact system is the Diverter switch essentially within a scaffold,

ψ consisting of a bottom plate 2 and a cover plate 3 of four isolated stud 1, arranged The upper level is thereby the resistance switching level W is _9, the mean level is the Vorkontaktebene Y and the lower level is the Hauptkqntaktebene Ho These three levels of the contact system are shown in Figure ₀ "1 shown individually in sequence» As can be seen, two fixed contact pieces 4 * 4 ", 5» 5'- »6, 6 ^{9 are} provided per level, which are carried by the outer frame parts, namely by the insulated bolts 1, , Between the fixed contact pieces 4 and 4 "or 5 and 5" or _c 6 and 6 "are'die contact carriers 7, 7, ⁹ , 8, 8 ', 9, 9" with the movable contact pieces 10, 10% .11 ,

k 11 ', 1.2 ,. The pivotable contact carriers 7 »7 ⁸ , 8, 8"',9> 9 "are all pivotable about one and the same pivot axis 13, so that the movable contact pieces attached to them; 10, 10», 11-, 11% 12, 12 'with the to-. associated fixed contact pieces 4 ₉ 4% -5 »5 '% 6 $ 6 ° can be brought into engagement or separated from them» The pivoting process of the contact carrier 7? 7% 8 _y .8 »o 9 _S 9 'is effected by means of a common drive shaft 14, which is connected between the Ko.titakt carriers 7 and. 7 ^B b, sw "8 and 8 ' ^J or" 9 and 9 ° and has a double-arm drive lever 15., - 16, .17 "for each level. Each arm of each double-armed drive lever is supported by springs!

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1 V ί '■: ■ S ^: c "- -"■''"""...5." -

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associated contact carrier 7 * 7 \ S ₃ 8% _3: 9 ³ and can each by means of a roller 18 and 1O ^'J on the or the back of the contact support slide along ".The the contact carriers by means DER drive Bebel motion imposed directed --SiCH thereby According to the Eurvenfornis, which the respective contact carrier offers the rollers 18 and 18 ". As a 'weather specialty it is also noticeable. The two ..contact carriers 7" and 7 * of the resistance level ¥ are spre.isba.rsi. because they have their movable contact ^{pieces 10 and 10 J} s.ur the same Zv-x't with the fixed contact pieces 4 and 4 ".Ui. . s 15 in the stretched angle] arranged Sindo DIE contact carrier 8 and 8 'of the ^J Vorkontaktebene Y exist just like the contact carrier 9 and 9 ³ Haiiptkontaktebant; H i.mz> part as "19 _S forms 20 each have a inner curve * through w.viehe · d.Ie .drive-shaft-14 leads ibt and on the other-sn. curve shape the double-lamellar drive levers 16 and 17 with their Rolit-n 18, 18 "ent, La .ng glide “The curve shapes of Imi & akxirven 19 <, 20 and dju; Kuryenfor-ni on the inside of the contact carrier "7 and T ⁹ s.snd. Dabe · *.!: So coordinated with one another ^ that when the drive shaft 14 rotates, the desired switching sequence at the contact points results" As a result of the relative slight movement of the contact carrier 7 _S 1 \ 8, 8 ³ _V 99 9 ³ in the area of their pivot axis 13, it is possible without difficulty ₉ to provide the current conductor 21 at this point let the three levels H ₅ , 7 _N W of the contact system ems ' zam "like the single stem point of all three. Phases leads _u The current derivation 21 is arranged approximately parallel to the pivot axis 13 and can with three-phase switches, in which the, three load changeover switches are easily arranged one above the other,) for all three phases dijX'chgang. be provided.,

The CU hai tabl on an iJmscha it process: is in the following explained in more detail with reference to Figures 1, 2 and 3,

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According to Fig. 1 is the diverter switch "in its, oneii Rest positionc All contact points on the right-hand side are closed which the right contact points are to be opened and the left ones to be closed, the drive shaft 1A counteracts Turned clockwise “This is expediently done abruptly by means of a conventional power storage drive. The first Phase of this rotary movement of the drive shaft 14 or the corresponding pivoting movement of the double-noise drive lever 15, 16, 17 leads to the following in the three switching levels Motion sequences

In the main contact plane H, the full 18 first slides down from the projection 91 of the right part of the inner curve, whereby the contact force directed to the right onto the contact carrier is zero ^{9 of} the left part of the Inn.erilai.rve _s whereby the force increases here and the contact carriers 9 ', 9 are pivoted to the left; that is, the movable contact piece 12 of the main contact level H lifts off the stationary contact piece 6 immediately when the switching process is initiated On the other hand, the roller 18 runs a little way up the flank 81 of the inner curve 19 and the roller 18 ³ runs in, just as much to the left in the direction of the flank 8'1 " ₉ without touching the Power relations in the pre-contact level ¥ fundamental changes; = doho. the movable vorüntakt 11 remains still in engagement with its fixed contact piece 5, in the resistance switching level at the same time the role Ί8- without changing the force acting on the contact carrier 7 continued to run, while the role 18% the "on a projection, TT ^{1 of} the contact carrier 7 * rests <, has already moved the contact carrier 7 * a little to the left to the fixed contact piece 4 ³ ο In the resistance switching level se did so liti -.- indirectly with the beginning of the Umsehaltvorganges the Spreading of the two contact carriers 7 and 7 "a ·» ^: ·.

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The "changes in the first phase of the movement run-up described here are _{drawn in dashed lines in FIG. 0} 1. The next phase of the movement sequence leads to the following changes (forgive FIG. ₀ 2 - and FIG. ₀ J)?" The contact carriers are in the main contact level H 9 * 9 ° and the two-armed lever 17 with the rollers 18 ₉ 18 'to an intermediate position "in which the action of force equal in both directions Istβ This center position results from the _s that the contact carrier' B ₉ 9 ° to pivot about the pivot axis 13, while the double-armed drive, iebsh * rbel Γ / iji.lt. much shorter lever arms with the drive shaft 14 pivoted

In the pre-contact level V, the roller 18% presses the ^ a in. ! Between against the flank 81 ⁸ was _s dl = * contact carrier 8 ⁸ and 8 to the left _fl whereby the movable contact piece 11 of the pre-contact plane lifts off its locking contact piece 5 and whereby the contact carrier B _s 8 ° also to the double-armed drive. ebsb.ebel 16 a «take center position« Here the roller 18 runs right to the end of the flank 81 while the roller 18 ° has not yet »fully run into the flank 81,

In the resistance switching level ¥, on the one hand, the role has continued to run up to the. Projection 71 of the contact carrier 7s while on the other hand the roller 18 ^r. Also "runs onto the projection 71 'of the contact ^{carrier 7 r} ₀ This is the spread of the two contact carriers 7% 7 ^β and the movable contact pieces 10, 10" of the resistance switching level are simultaneously in engagement with the associated fixed contact pieces 4 and 4 · "■" - ■ - "

The rest of the movement is in reverse order as follows? . . .

In the main contact level 4, the rollers IB and'.iS * run without changing the position of the contact carriers 9 »9 ^S KtmMchst on the ^ flanks.92 _? 92 * further naph, left ils the Holle 18 'at the ledge 91' sur plant. In the pre-contact level

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does roller 18 press ^? however, the contact carrier 81 ', 81 to the left so da.J3 the movable contact piece 11 ° "comes to rest on the fixed contact piece. 5 Simultaneously with this Yorgang is in the resistive switching level, the roller 18 from the projection 71 upward, herungergelaufen ₉ so that the movable contact piece 10 has lifted from the fixed contact 4 _g while the roller 18 ⁸ as' maintain the contact force on Kontaktträger'7 "run down along" is finally also has the roller 18 "in the main plane of contact _s d, ie yes now against the projection 91 ° had moved ₉ the contact carrier 9 »9! Moved further to the left ₉ so that the contact hub between the movable contact piece 12 ^s and the associated fixed contact _{piece 6 ° was also established s} with the roller IS ⁹ for Generation of the contact force · has completely ^{accumulated on the protrusion 91 9.} «It should be mentioned ₉ that the switching process described here in one of its phases is abruptly internal half of fractions: a second takes place ».

For current waveform is still said- ₉ that in the rest position, according to Figo 1, the current corresponding to the direction of the arrow substantially along the main contact plane H, and partly also via the Vorkontaktebene V to the star point runs _s. While the resistive switching plane because of the Schaltwi.der prior R) practically not at the current-carrying part * Geraäß Figo 2, the limited by the resistance R flow passes solely through the resistive switching plane W ₀ whereas in Figo 3, a through the two Schaltwlderstände R and R ⁹ Limited step free & short-circuit current flows through the resistance switching level o- '.- · ... "■■ ..-.-." , '- ■■ "■

BATH ORIGINAL

Claims (1)

Claims Diverter switch for tap changers of regulating transformers with a contact system arranged in a frame consisting of three levels, one level being designed as a resistance switching level, one as a gate contact level and the third as the main contact level, and with at least two "fixed contact pieces" per level on the outer frame parts and two internal pivotable contact carriers carrying the movable contact pieces are provided, characterized in that; that the contact carriers (7 »7" »8, 8 '., 9» 9 ") can all be pivoted about one and the same pivot axis (13) and, by means of a common drive shaft (14) _9, each of the two contact carriers (7, 7V , 8, 8 ° or 9.9 ^s ) of a plane (W ₉ Y, H) vist, can be actuated, the drive shaft having a double-sided drive lever (15 »16 ₉ 17) has »and that the two contact carriers (9> 9 ') of the main contact level (H) as well as the two contact carriers (8, 8") of the pre-contact level (V) are rigidly connected and between them an inner curve (19 , 20) form »in each of which the associated double-armed ₉ right-angled drive lever (16, 17) engages, and that the two contact carriers (7» 7 ") of the resistance switching plane (W) can be expanded and each contact carrier has one on its inside "Has spreading causing curve shape, on which the to belonged elongated -_ double-armed drive levers. (15) slides along. 20985270A70 Diverter switch according to claim 1, characterized in that that the neutral point derivative (21) of all three levels in Near the pivot axis (13) is connected to the contact carrier and runs approximately parallel to the pivot axis. Diverter switch according to claim 1 or 2, characterized in that that the drive lever as a roller lift! are formed, whose. Rolls (18, 18 '). on the inside curves roll off. Diverter switch according to claim 1, 2 or 3 *, characterized in that the frame essentially consists of a base plate (2) and a cover plate (3) * in which the pivot axis (13) and the drive shaft (14) are mounted, as well as four isolated ones Bolt (1) - exists ₉ and that the current path parts of the individual levels sit on the bolt and the pivot axis in line-up " 9852/0470 Empty soap