DE1907874U - LOAD SWITCH FOR STEPPED TRANSFORMERS. - Google Patents

Description

»128850 2MiM

Licentia

Patent - Verwaltungs - G-.m _o b _o Ho Frankfurt (Main), Theodor-Stern-Kai 1

L 27 555 / 21d Gm Frankfurt, November 13, 1964

PB-No, 11 806 ■ ■. HE / P-FSt-11 / Blssinger / Pi. -

Position switch for 'step transformers.

The innovation concerns diverter switches, whose movable contact pieces execute a rotary movement around the switch center axis and whose fixed contact pieces are arranged in a circle ο It is already known ₉ the movable contacts = -. ■ execute pieces as roller bodies ₉ hold them in a bogie su and with spring force against the switch means =. axis swept surfaces of the stationary contacts to - press. When the frame is rotated, the lobes brush these contact surfaces ο The current is diverted iron to the SoI-. len about their bracket and the bogie. However, this has the disadvantage ^ that the bearing points can scorch and that for the conductive connection of the moving parts strands "must be used, which always represent a sensitive point in diverter switch construction"

The innovation provides a remedy here and is characterized in that, in a manner known per se, a contact ring 4 is fixedly arranged coaxially to the "contact path" and the EoIlenkbody 5 is designed so that it rolls simultaneously on the contact ring and this alternately with the individual contact pieces S. ₅ 15 conductively connects, and that furthermore the running surface of the roller body on 'a rope of the circumference is made of particularly arc-resistant material, while the other part of the circumference

L_27 355 / 2ld Gm -. - 2 -

PB no. 11 806

has softer and particularly good conductive contact material, and that with the help of a known toothing of the roller body with a fixed ring gear 3, the angle of rotation of the roller body achieved in the course of a switching process about its axis is dimensioned so that in the rest positions the highly conductive part of the The roller circumference rests on the respective main contact, while in the intermediate positions the arc-proof part of the roller circumference is drawn around the contact pieces 6, Ί5. The current conductor is connected to the contact ring. It is optionally connected to one of the main contacts connected to the roller body. With this arrangement, no current flows through the roller body bearings and can therefore easily be stored isolated from the drive elements with the help of insulating sleeves be flexible conduit parts as Z ₀ Β "strands foregone the toothing of the Rollenkßrper with a toothed ring forces a uniform rolling motion" and allows ₅ that rkmal of leuerungsgegenstandes the tread of the roller body partially made by Einein further embodiment manners on their periphery made of different materials. for example, the areas exposed to the effect of the arcing can be covered with a particularly hard material ₉ while the areas causing permanent contact are made of softer and particularly good conductive material.

If the pitch circle diameter of the toothing is dimensioned larger or smaller than the diameter of the running surfaces, the roller bodies also perform a sliding movement in addition to rolling ₅ so that the contact surfaces clean themselves and grind smoothly "

A particularly small multi-phase embodiment of a load switch can be achieved by the fact that several of main =

PB no. 11 306. · ■

and Hüfkontaktstüeken existing and for single-phase load switching usable "fixed contact sets one single". Form a circular contact path and the number of contact sets corresponding to the bolt bodies are attached to a common rotating frame. In the case of three-phase ₉ switches installed on the star point side of the winding, the contact ring serves as the star point and. does not require a connection line »Such. Sehalter can also be used single-phase for large currents ₉ if the corresponding main key clock pieces are connected to one another ", the three 'contact sets with their associated switching resistors are thus simply connected in parallel"

Subsequently, an embodiment of the innovation is to hand are described in more detail by two figures ο

1 shows a longitudinal section and FIG. 2 shows a plan view a three-phase neutral point diverter switch <> Identical parts are denoted by the same reference numerals »

Mg » 3 shows a different form of the contact roller as well as the fixed contact piece © and the contact ring <,

The switch base plate 1 is deepens funnel-shaped yer ~ in. The middle and "transmits serving as a diverter switch of insulating = material tube 2. At this 6 _S attached to the six auxiliary contacts 15 and parallel. Including der'Kontaktring 4 in a cross sectional plane, the six main contact pieces" The Contact ring 4 carries an internal ring gear 3. In the center of the base plate 1, a _{vertical axis 9 is attached 9,} which can also be designed for sucking off the oil sump The contact rollers 5 equipped with two running surfaces bear _o The roller axles 13 sit on "=

E 27 355 / 2ld Gm -

PB-No ₀ 11 80β '

the ends in guiding pieces 7? which are fitted into oval slots of the steep arms. The guide pieces 7 are pressed off by helical springs 8 τοη.der switch center axis, so that the contact surfaces 5 lay with the running surfaces against the fixed contact pieces 6§ 15 or against the contact ring 4 . As a result of the radial mobility of the guiding pieces 7, the contact rollers 5 are able to incline outward in the intermediate positions and thus connect two adjacent contact pieces su. On the underside of the contact rollers 5, gears 11 are attached which are constantly in engagement with the ring gear 3 and thus guarantee a pure unrolling process "due to the equality of running circle diameter and pitch circle diameter" animal going tooth segment ₉ which drives the gear 12 attached to the bogie 10 «

From Figo 2, the .Einschalt the supersal twidefstands. 14th between the main and ■ associated auxiliary contact pieces. Before the main contact pieces are made of wear-resistant V7tungsten copper also occupied that part of the contact roll circumference, which rolls on the wear-resistant contact surfaces *

Fig _? 3 shows a particularly favorable form of the contact roller 16 similar to a V-belt pulley. The stationary contact piece 17 shown in section is rounded to form a bead, so that there are always two contact points. This shape ■ also increases the short-circuit strength of the contacts «

The mode of operation of this roll-off switch corresponds to that of known diverter switches with two undivided overshoot resistors per phase. The contact tubes move in each case Circuit of a main contact piece of the concerned. Con-

11 806

taktsatses to the other and back again with the next switching. In the meantime, each time the voter switches the tap to ₀

5 pages description of 4 safety requirements

Claims (1)

.BU128B50 2311ft Licentia Patent · ™ Administrative - G-onuboHo Frankfurt (MaIn) ₉ Theodor ° Stern-Kai \ Frankfurt, November 13, 1964 PB-No ₀ 11 806 -HE / P-ESt-11 / Bissinger / Fi ut ζ an s ρ rüche load changeover switch for step transformers with a path of circularly arranged ₉ stationary main ™ and resistance contact pieces and with movable contact pieces in the form of roller bodies, which are pressed with spring force against the surfaces of the stationary contact pieces facing the center of the circle and roll over these surfaces during the switching process, characterized in that in a manner known per se coaxially to the 'contact track a _s . Contact ring (A) is fixed and the roller body (5) is designed so that it simultaneously rolls on the Kontakt ™ ring and alternately connects it with the individual contact pieces (6, 15), and that the running surface of the roller body _s is on a tail of the circumference of particularly an arc-resistant material during the particular on = parts softer the circumference and having especially good conductive contact material _s ", and that with the aid of a per se known toothing of Boll body with a fixed tooth crane (3) in the course . a shift ersielte angle of rotation about the Eolienkörpers its axis sen so toernes _«% that in the rest positions - the Eollenumfanges rests the high conductive part on the respective-Haup'tkontakt, ¥ t uring of the intermediate positions of the arc-resistant rope..? Roller circumference faces the contact pieces (6, 15). Ι_26_355 / 2ΐά Gm
PB = no. Ί1 806. 2ο diverter switch according to claim 1, characterized ₉ that the roller body (5) is pivotable and radially displaceable in the Schaltermittelaehse ge · = meinaamen plane " 3ο diverter switch according to claim T and 2 _S, characterized in that the roller body (5) is mounted insulated from the drive elements with the aid of an insulating material 4p diverter switch according to claim 1- ~ 3? characterized, that several consisting of main · = and auxiliary contact pieces and fixed ones that can be used for single-phase load measurement Contact sets form a single circular contact path and the cones corresponding to the number of contact sets = body mounted on a common bogie (10). are «■ ■