US1869233A - High potential transformer - Google Patents

Description

July 26, 1932. E. WELTER HIGH POTENTIAL TRANSFORMER Filed July 22, 1930 Patented July 26, .1932

UNITED STATES P A TENT QFFICE EDUABD WEL'IEB, OI DBESDEN', GERMANY, ASSIGNOR TO KOCH &"STERZEI| AKTIEN GESELLSCHAI'T, OF DRESDEN, GERMANY, A GERMAN COMPANY HIGH POTENTIAL TRANSFORMER Application filed July 22, 1980, Serial Roi 469,812, and in Germany July 27, 1929.

M invention relates to transformers and particularly to those of the class used in the measurement of hi h potentials in which the high potential winding comprises aplurality of interconnected coil or disc-shaped winde ings arranged in the form of a layer or layers surrounding the tubular partof the'spool and has for its object to provide a spool such, for exam is, as that described in the specification F. J. Fischer application No. 446,622, filed the 23rd of April 1930, about which the high potential winding, formed independently of the spool and prior to assembly, can be arranged.

A constructional form of the invention is illustrated by way of example in the accompanying drawing.

The spool surroundin the iron core 13 and the secondary win ing 14 consists of two insulating bodies 110, 111 which, while being referably circular, may be of any other esired shape. Each of these bodies is provided at one end with a preferably annu ar flange 110, 111 respectively in suc manner that when the bodies are telescoped one within the other in the manner shown there is formed a spool for the high potential windin of the usual flanged-end type.

The igh potential winding, in .the example shown, consists of three layers 112,

113 and 114, each of which comprises a plu-.

ralit of inter-connected coil or disc-shaped win ings 115. These individual windings 115 are so arranged and connected in series that complete layer windin are formed, the individual windings of eac layer being separated from each other by means of insulating rings 116.

At the end of each of the two outermost winding layers carrying the highest potential there 15 provided a ea or plate 117 formed as a flange at the en of the respective insulating cylinders 1'17 separating the windin layers 112, 113, 114. Thus, in this way, t e creeping path or lag is augted.

If it is desired to use a transformer having a hi h potential winding and spool of the t pe erein specified in cascade the over ooup g windings are preferably arranged in layer-wise formation over the entire length of the spool body,

ing, the bodies may be interconnected by means of screw threads, the 'lag over the securing joint being correspondingly increased. It is also possible to'provide a joint between the two insulating members which is partlg inclined or stepped and partly threade v i It will thus be seen that, with a spool of the type above described, the high potential winding may be formed prior to assemblin h the transformer and, after havin been fitte over the body of the outer mem er 111, the member 110 is telescoped within said outer member and secured thereto as desired, the a spool thus formed bein for all practical purposes,

bodies are formed of suitable material, it is possible, after the winding1 has been fitted and the joint filled in wit cementin medium, to bake said bodies'together. oreover, should said bodies be constructed of porcelain or the like they could be secured with the aid of binding medium such, for example, as china-ware cement.

What I claim and desire to secure by Letters Patent of the United States is 1. In a high potential transformer particularly of the class used in the measurement of high potentials, a high potentiallayerwise winding, a spool on which said winding is fitted, the winding extending over the entire axial length of the spool in such manner that its otential increases from the outer lying initial potential towards the core surrounded thereb pair of preferab y tubular members each rovided-at one end with a. flange, said mem rs said spool comprising a being telescoped one within the other to form said spool, their engaging surfaces being secured together.

2. In a high potential transformer particularly of the class used in the measurement of high potentials, a hlgh potential layer-wise winding, a spool on which said winding is fitted, the winding extending over the entire axial length of the spool in such manner that its potential increases from the outer lying initial potential towards the core surrounding thereby, said spool-comprising a pair of preferably tubular members each provided at one end with a flange, said members being telescoped one within the other to form said spool, their engaging surfaces being secured together by baking.

3. In a high potential transformer particularly of the class used in the measurement of high potentials, a high potential layer-wise winding, a spool on which said winding is fitted, the winding extending over the entire axial length of the spool in such manner that its potential increases from the outer lying initial potential towards the core surrounded thereby, said spool comprising a pair of preferably tubular members each rovided at one end with a flange, said mem ers being telescoped one within the other to form said spool their engaging surfaces being secured together by baking and being inclined with relation to the axis of the high potential winding.

L In a high potential transformer par ticularly of the class used in the measurement of high potentials, a high potentiallayer-wise winding, a spool on which said winding is fitted, the winding extending over the entire axial length of the spool in such manner that its potential increases from the outer lying initial potential towards the core sur-" rounded thereby, said spool comprising a pair of preferably tubular members each provided at one end with a flange, said members being telescoped one within the other to form said spool, and being held in threaded engagement with each other.

5. In a high potential transformer particularly of the class used in the measurementof high potentials, a high potential layerwise Winding, a spool on which said winding is fitted, the winding comprising a plurality of series-connected coil or disc-shaped windings forming layers and extending over the entire axial length of the spool in such manner that its potential increases from the outer lying initial potential towards the core surrounded thereby, a pair of preferably tubular members each provided at one end with a flange, said members being telescoped one within the other to form the spool, their engaging surfaces being secured together as desired.

EDUARD WELTER.

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