DE1225292B - Multi-phase step switching device for a step transformer - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

HOIf

HOIh

German KL: 21 d2- 53/03

Number: 1225 292

File number: S 59057 VIII b / 21 d2

Filing date: July 18, 1958

Opening day: September 22, 1966

The invention relates to a multi-phase tap changer for a tap transformer, consisting of at least two series-connected, multiphase switches, namely one Diverter switch with at least two fixed contacts per phase, bridging resistors and one multi-armed contact part rotatable about an axis, with all fixed contacts on one to the axis of rotation concentric circle distributed at equal angular intervals, the arms of the rotatable contact part in a Arranged multiple of these angular distances amounting to angular distances and those with different Phases connected fixed diverter switch contacts on the circumference around the angular distances the arms of the rotatable contact part are offset from one another, as well as from a step selector, each phase has several fixed contacts connected to the transformer taps and two in a row has adjustable switching arms, which the fixed contacts of the selector in sequence with the fixed Bring the contacts of the diverter switch into connection.

Such tap changers with diverter switch skid are known. The diverter switch is included designed like a toggle switch. Especially when it comes to diverter switches the arrangement of the switching contacts of the various phases and the intricate drive mechanism required for this the moving switch contacts difficulties. The diverter switch also needs a plurality of fixed contacts.

Furthermore, tap changer arrangements are known in which the diverter switch is a complete circuit runs through to sample all taps. A movable switching contact, the two movable auxiliary contacts connected to it via resistors are assigned. The number of fixed switching contacts corresponds to the number of transformer taps, which is a larger Number of taps leads to difficulties. With multi-phase tap changers required the diverter switch of several switching levels according to the number of phases.

There are also single-phase diverter switches that circulate a complete circle several times, however switch only one transformer stage with each revolution. There are two fixed switching contacts, a movable switching contact and one or more, also movable auxiliary resistance contacts intended. Here, too, the diverter switch is required for multi-phase tap changers several switching levels according to the number of phases.

Multi-phase tap changer for one
Step transformer

Applicant:

Willem Smit & Co's Transformatorenfabriek N.V., Nijmegen (Netherlands)

Representative:

Dipl.-Ing. H. Schaefer, patent attorney,

Hamburg 1, Ziesenissstrasse. 6th

Claimed priority:

Netherlands of July 22, 1957 (219 202)

Finally, multi-phase tap changers are known in which the diverter switch in a circular level goes through all taps of several phases. However, there are two in each case Movable contact carriers on planes are provided for carrying out the switching process. This diverter switch can only do one Execute one revolution.

The purpose of the invention is to provide a multi-phase tap changer of the type mentioned at the beginning to create that combines the advantages of the previously known facilities. It is characterized by that each fixed tap selector contact connected to a transformer tap a second fixed contact connected to the diverter switch is assigned, the tap selector arms are designed as bridge contacts, each time two associated fixed Connect contacts with each other, that also in each phase the transformer taps to be successive belonging second fixed tap selector contacts one after the other with those in one or other direction of rotation connected to consecutive fixed diverter switch contacts are, so that when going through the transformer stages the fixed diverter switch contacts with the Transformer taps of all phases are connected one after the other in a cyclical sequence, and that finally the bridging resistors in a known manner together with pre-contacts are arranged on the rotatable contact part.

609 667/142

The advantage of the invention is that auxiliary components connected together are added. The heliche Fixed and movable switch contacts of all movable switch contacts 28, 29, 30 of the load phases the diverter switch in a circular plane lie- changeover switches are via slip rings 31, 32, 33 with gen, whereby the height of the switch is substantially connected to the motor 4.

can be reduced. Associated with this is the 5? ' In the illustrated state of the Stüfenschalteiriricn advantage, that the diverter switch on tung is continuously .the motor via which festen.Kontakte 22, 24, a plurality of ^{revolutions, he} w.eit S ^escna lt ^e are 26 t of the load switch, the rails 16, 18, 20 and can. As a result, the number of fixed switching the movable switching contacts 15 of the 'tap selector contacts of the load switch is particularly small. Thus, in one embodiment, this number is completely independent at the lowest transformer tap 5. When the motor 4 is started, this depends on the number of transformer taps, by means of the tap selector 14, 15 one after the other, and in fact it is twice as large as all the taps of the transformer 1,2,3 verNumber of phases. For example in a triple bundle. For the connection with the 6 phase system taps, the diverter switch only needs six fixed switching contacts one step at a time. 15 to be turned to the right. This is straightforward

In the case of coarse and fine-level switching, it is also possible because the fixed switching contacts 23, 25, 27 advantageously match the number of fixed switching contacts of which the movable switching contacts 28, 29, 30 of the diverter switch correspond to the number of fine-stage tapping load switches In this case, contact can be made equal to a transformer phase, over the rails 17, 9, 21 and the moving In this case, one can use a switching contact 14 borrowed in one direction of the "Stuf'enwählejs already advancing stage selector for the fine span - _; talks to the taps 6 of the correct ones. Use voltage control phases regardless of the number of transformer windings connected. The load levels, the associated level selector for the 'coarse changeover switch .may therefore the contacts 22, .23 or '24, voltage regulation; ■■ '- -'— * ^; "- - * - £ 5 or 26, 27 temporarily over the

^ Dre: -Drawing, which shows some 25 bridging resistances of the movable. Switchboard

Schemes of three-phase tap changers _{according to:} - cycles; connect with each other. To the connection of the

of the invention represents, for example. In it is the motor to the taps 7 must first

Fig. 1 a ·. Scheme!; ^ A, three-phase starter movable · switching contacts.; 15 of the step selector

device for a motor,. ■ · - ·. ".- be placed on these taps.

2 shows a diagram of a step transformer with 30 steps, so the switch can be moved one step further by a step switch provided with a step selector for the coarse voltage regulation Switching contacts ·· 28, .29. ,, 3O of the same with three voltage levels ,, a level selector for "which the fixed switching contacts 24 ^, ^{26,22 come into contact fine voltage regulation 5} Mt six voltage levels. In this case the. Motor, Via the and a diverter switch "with six fixed switching rails 18, .20, 16 and the movable switching contacts, i, contacts 15 with. -The taps 7 of the correct

Fig. 3 is a diagram of part of a tap change phase connected. Thereupon, “the desire *. for remettsiStüfentransfonnatör, which Sehaltkontakte4 of the; .step selector, on the.Anzap switch; with * 3 a. * call selector .. for -the fjxngen 8 and the diverter switch can be turned on fine voltage regulation with seven voltage levels 40 new by one step in the same direction and a diverter switch with seven fixed switching ι rotated the; s-_ rebölt see ' until all. Trans _: ■ contacts-provided, "imd." -: · "',:;: | pr ^ a | ofanz3pfuHgen ^ 5, Ms,; 13..na" chemander_jlurch 1. Fi.g.-4 a scheme emes _: Part of a step switch the. Stafenwählerkpntaiktecli ,, 15' _: The device has been scanned: for a ': - step transformer, "which are; ■;. ';; - .; 3 r "v '\ v.? ■ _'ιοί;..; · ': -.: ..___'
Switching device with a. Tap selector .-. For the 45 -; ^. Ar ^ s, -. Dem..Sichetoa-na ■ ell ■. £ Fi; g, .. l "goes. Heryor, -that fine 'voltage regulation ^ with> achi voltage levels,. always those: 'feitenZSchaltkontakte ... des "Xasttmd a diverter switch with eight fixed switching .ums.chajters ^. the movable ^ switching contacts is provided. «■ ...'-. '"-' ■ ". . Äies.es switch to: "the. following-possible - · In'Fig.'l smd'l, 22tuid ^: 3 the" coils of the second? Circuit. always jnit. the following is used for food emea motors 4. These coils or the. Transfprmäföranzapfung are sorted, with taps 5, 6, 7, 8, 9,10, '11 ^': 12,13 -the proper pH ass-yerbünden are ^so-r that "you provide the ■ At each stage ^ these taps are. moving the Schaltkontäkte - Läst switch miit'Hilfe a Stromlo &'schaltendencStüfenwählers when:... increasing the; _voltage; einen.nnd in the rows arranged in two pairs with in-· 55 fixed lowering the "Spanming ^ in dei other. Hichtun'g switching contacts' and .. '2Wei! With it "work together ¹ -.' Can step by step. Bridge contacts -..-, Fig * 2. refers to = one: three-phase connector ■ 14, 15 optionally with the busbars. 16, 17 ^ transformer with a step switch device for 18, "19, 20, '2l · one. Rail system connected, with regulation of the voltage; a network'Ä, 5, T .. These which rails'die .'- in one' single ring anr 60 3tiifenschalteinriehtlrng "consists of an electrolessly arranged fixed Sßhaltkpntakte .22, 2.3, 24 ,. 25, 26, ■ ·! Switching 'step changer .for the; coarse “Spannungsr -27” a load change-over control which switches under load and whose movable switching contacts 34, 35 are connected. With the fixed switching contacts with the taps ^ 36, .37, 38 of the coils 1, 2,. 3 ■ 22 to 27, the 'lower equal angular distances in the secondary winding - the ..- ..; Transformer to, - "wreath. Lie, work-dreji under, fixed angles vpn 65 s. Work together; a currentless switching step; 120 ° against each other-veischöbene, around / the 'axis of the r selector for the. Fine voltage regulation; its over Wreath rotatable safety contacts 28, 29; 30 "züsarfiT -payed switching contacts 3i9, .4Ö '.with;'the coarse transfer-

Claims (1)

5 6 matoranzapfungen 36, 37, 38 or with the taps one and to lower the voltage in the other catch 41, 42, 43, 44, 45 separate coils 46 can switch the direction. The two tap selector secondary winding work together, and one and the diverter switch must be moved in the reverse load-switching diverter switch with the set direction, if the fixed switching 5 forniator voltage arranged in a single ring are lowered instead of increased contacts 22 to 27 and those under fixed angles target. Also in the latter case, the switching contacts 28,29,30 following the diverter switch and the auxiliary contact of this switch connected to it via resistors are shifted each time by 120 ° against each other, around the axis of a fixed switching ring that is in operation through the tap selector. The movable switching contacts 28 to 30 io with the lower transformer tapping of the diverter switch are connected to the star point 47 of the same phase before the diverter switch transformer winding and the fixed switch contacts are turned back one step ...; -.
bars 22 to 27 connected to the rails 48 to 53. The switching devices according to FIGS. In the state shown, the tap changer is also on the tap changer of a device, the star point 47 is connected to the low-15 three-phase tapped transformer with the most loaded transformer taps 36. If the voltage has to be increased, the only difference is that after the diverter switch from the first contact * Fig. 25, 27 voltage levels in seven or eight, fine voltage switches and then the star point is divided over the 20 levels and the diverter switch with fixed switching contacts 23, 25, 27, the rails 49, 51, seven or eight in one single. Kranz angeord-53, the movable switching contacts 39 of the stepped fixed switching contacts 54 to 60 or 61 to wälllers for fine control, the taps 41 68 are provided with which three in a single of the coils 46 and the movable switching contacts - surface rotatably movable switching contacts 69, 70, 71 35 of the tap selector for the rough regulation on the 25 or 72, 73, 74 cooperate in fixed taps 36 of the coils 1, 2, 3. The transfer angular distances that are at least twice the mator voltage is then increased by a fine voltage angular distance between the fixed switching contacts. For the following voltage level 54 to 60 or 61 to 68 are the same, the movable switching contacts 40 of the fine are arranged from one another. Step selector on the taps 42 of the coils 46 3 ° After the explanation of the effect of the steps and the diverter switch is again switched to switching device according to FIG. 2 can have one more legs Step rotated further in the same direction, as described in the tap changer that the movable switch contacts 28, 29, 30 of FIGS. 3 and 4 are omitted. It is also noted Diverter switch to the fixed switching contacts 24, that if a call selector has an odd step -26, 22 come to rest. For the further voltage number, as in FIG. 3, each of the two sets of ascension each time the movable switching contacts 75, 76 of this selector with Switching contacts 39 on the taps 43 and 45 must all relevant transformer taps and the switching contacts 40 can be connected to the taps 44, otherwise the movable brought, while after each step of the level switching contacts 75, 76 of this level selector not of Selector of the diverter switch by one step in the - 4 ° the series of fixed contacts of the relevant phases the same direction of rotation is switched. If that goes over to those of other phases, i. H. in The end of the coils 46 has been reached, so a single direction could switch. this the movable switch contacts 34 of the coarse stage is based on the fact that each of the movable switch selector Contacts 75, 76 are placed on the taps 37 of the coils 1, 2, 3 even in the case of an odd step and the movable switch contacts 45 number can only perform two-stage steps, so 40 of the fine tap selector from the taps that the movable switching contacts 75, 76, the first 44 of the one phase after the taps 37 of the phase following the odd or even transformer. . tap the one phase, after which The diverter switch then makes a transition to the next or previous phase Turned one step further. Once this has happened, 50 are tapped with the even or odd taps. the movable switch contacts 35 of the coarse will work together. Tap selector also on the taps 37 .. lays and becomes the switch contacts 39 of the fine patent claims: Step selector that is opposite the taps 1. Multi-phase step switching device for 45 of the coils 46 were located on the taps 41 55 a step transformer, consisting of less Coils 46 of the following phases are switched on. at least two series-connected, multiphase Then fine voltage regulation can be done again in switches, namely from a diverter switch be carried out in the manner already described. at least two fixed contacts per phase, The coils 46 are then but through the switching bridging resistors and a multiple contacts 35 with both the main winding and the contact part rotatable about an axis, with a coarse step of the coils 1,2,3 in series with all fixed contacts switched on one for rotation. At each coarse step these coils can axis a concentric circle at the same angle This voltage regulation repeat itself, so spaced apart, the arms of the rotatable that the transformer with 2-6 + 5 = 17 chip contact part in a multiple of these angular steps is provided. 65 spaced angular spacings It will be noted that, like the load net and those associated with different phases changeover switch, the step selector for the fine tensioning fixed diverter switch contacts on the Voltage control to increase the tension in. the circumference around the angular distances of the arms of the rotatable contact part are offset from one another, as well as from a step selector, which each Phase several fixed contacts connected to the transformer taps and two has successively adjustable switching arms, which the fixed contacts of the selector one after the other connect with the fixed contacts of the diverter switch, characterized in that that each fixed tap selector contact connected to a transformer tap a second fixed contact connected to the diverter switch is assigned, wherein the step selector arms are designed as bridge contacts, each time two to each other associated fixed contacts connect with each other, that also in each phase the successive Second fixed tap selector contacts belonging to the transformer taps one after the other with those immediately following one another in one or the other direction of rotation Fixed diverter switch contacts are connected, so that when going through the transformer stages the fixed diverter switch contacts, with the transformer taps of all phases one after the other are connected in cyclical order, and that finally the bridging resistances arranged in a manner known per se together with pre-contacts on the rotatable contact part are. 2. Multi-phase tap changer according to ίο claim 1, characterized in that at coarse and fine switching, the number of fixed diverter switch contacts is the same Number of finely graded taps in a transformer phase. Considered publications:
German patent specifications No. 543 882, 648 600,
188, 717 340, 743 349, 751155, 911762;
Swiss patents No. 283 549,
ao 286 652; British Patent Specification No _{> £} 520 119, 773 759. 1 sheet of drawings 609 667/142 9.66 © Bundesdruckerei Berlin