US1507190A - High-tension transformer - Google Patents

Description

"septl z g' um H. KRESS HIGH TENSION TmmsFoRlan F11od.Avr11 9 1923 Patented Sept. 2, V1924.

UNITED STATES PATENT y oFFlcE.

HIGH-TENSION TRANSFORQMER.

Application led April 9, 1923. Serial `No. 630,915.

To all whom ztvmay conce'rvm.

Be it known that I, HUBERT Kauss, a citizen of Germany, residing at- Frankforton-the-Main, Germany, have invented cer- 'tain new and useful Improvements in High- Tension Transformers, of which the following is a specification.

This 'invention is an improvement in high tension transformers of that kind in which the transmission of energy from the generator or the like to the, high tension windings or secondary coils or conversely is effected by one or more intermediatelinks suitable for transmission of'electro-magnetic energy, such as transformers, condensers or the like, which can maintain a definite potential given to them.

According to the present invention the energy transmitting link is` constituted by the iron core of the transformer itself, which is strongly insulated from the low tension or exciting winding and from the earth. The

n high tension winding is subdivided into two electrically connected sections between which the exciting winding is arranged on and strongly insulated from, the iron core which is controlled as regards its potential and insulated from the earth. This results in a simpler construction and in considerable economies in material.v

Three differentconstructions according to the invention are illustrated by way of example in the accompanying drawing.

Figure 1 shows a transformer for, say, 200 kilovolt secondary tension.

Figure 2 shows a transformer for say 200 kilovolt in which however the arrangement ofthe windings is slightly different from that shown in Figure 1.

Figure 3 shows a transformer ink which in front of the high tension transformer a help-transformer is connected.

The left hand side of each figure gives the connection diagram, whilst the right handside shows more fully the construction. The invention is embodied in each half of the figures, so that'either the right or the left hand .side can be omitted.

In all the three constructions (Figures l-S), the high tension winding is subdivided into two parts a and b. The exciting winding d is arranged between them onanopen or closed iron corea.

The iron core is Ainsulated. from the earth, this being done for instance by insulators m supporting the casing Z. v

If in the connection according to Figure 1 the potential difference between the secondary terminals my y of the' transformer, which is earthed at e be 200 kilovolts, the potential values at various points vof the transformer will be those given in the unbracketed figures. A potential of 50 kilovolts is given to the iron core bythe connection n. The potential differences between the important points of the high tension windings a, b, iron core c or casing Z and the exciting winding d are given in brackets. It will be seen that thelpotential difference at no point exceeds 50 kilovolts.

In Figure l the two central turns f and of the high tension windings a b are tobe insulated from the low tension winding d,

'b is electrically connected to the inner end f of the winding a by the conductor g or preferably by means ofl the iron core. The potential at the central turn 7L of the winding b will then be zero, so that this end can be connected to the exciting winding d, and nee-d not to be insulated from it. The winding d can therefore be brought close to the end h of the winding b, so that insulation at that point will not be necessary.

The transformer in Figure 3 which is built say for 300 kilovolts, is in its upper part a b o d, a transformer according to Figure 2. Th'e exciting winding d is not however supplied directly from a line circuit or tension current which excites the coil d;

Owing to the connection to the inner ends of the windingsa and o, a higher potential (5() kilovolts) is superposed over the low tension of the exciter windings d d',

Also in the construction in Figure 3, the potential difference is nowhere higher than 50 kilovolts. V, l

What I claim is:

1. A'high tension transformer havin a high tension winding, an exciting winding and an iron core, said hi h tension winding being divided into two e ectrically connected'sections, said exciting winding being arranged between said sections and highly insulated from said core, and said core being insulated from earth and given a predetermined potential with respect thereto.

2. Al high tension transformer including a high tension winding divided into two spaced electrically connected sections, an iron coreinsulated from earth and having a predetermined otential in respect thereto, an exciting win ing arranged between the said sections and highly insulated from said core, one end of said high tension winding being at ground potential, situated between the said Asectionsand adjacent said excitin winding whereby no-insulation is requir between said exciting winding and one section of said high tenslon winding.

3. A high tension transformer including a high tension divided into two "spaced sections, an iron core insulated from earth, and having'a predetermined potential with respect thereto an excitingwinding arranged between said sections and highly insulated from said core, one end of said 'high tension windin bein at zero potential and adjacent sai exciting winding, and the two sections of said hi h tension winding4 bleing connectedthroug said core.

'a high tensionwinding divided into two electrically connected sections, an iron core .insulated from earth land havin a'predetermined potential with respect t ereto, an

high tension transformer including v? exciting wlnding, highly insulated from said core, arranged between said sections, onel end of said high tension winding being given a zero potential arranged ad acent and connected to said exciting win l In testimony whereof'I aix my signature vin presence of two witnesses.V Y 4 f Y HUBERTKRESS. ,Witnessesz Y Grammar)v Hiinnns, Cam. Rrrz.-

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