Improvements in Distributing Electricity with Alternating Currents.
Year: 1887

page_text: Date of Application, 16th Feb., 1887.
Specification Accepted, 25th Mar., 1887.
Improvements in Distributing Electricity with Alternating Currents.
I, OTTO TITUS BÁLTHY of II. Hauptstrasse 75, Budapest, Hungary, Electrician
do hereby declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
This invention relates to the system of electric distribution described in the
Specification of Zipernowsky and Déri's Patent No. 3379 of 1885 and its object is to
attain by a proper arrangement of conductors a nearly uniform and constant tension
of the current supplied to consumers.
I effect this by supplying consumers from one or more nets of low tension con-
ductors, which nets receive the low tension current at suitable points from the
secondary coils of alternating current transformers that can be arranged singly or in
groups of two or more. I supply the high tension current to the primary coils of
the transformers or groups of transformers by a line of conductors extending to
each from the generating station either inside the area to be supplied or at a suitable
point outside of that area, or I derive the primary coils of the transformers from a
net of conductors for the high tension currents and supply the high tension current to
this net at suitable points by feeders extending thereto from the electrical generators.
In both cases I provide in the conductor for feeding or supplying the high tension
current from the generator, adjustable resistances or adjustable self induction coils or
combinations of these, arranging them preferably at the generating station. From
various suitable points of the low tension net or nets I connect small wires to the
generating station, so that the tension at these points of consumption can at any time
be ascertained at the central station. These return wires may be dispensed with by
the application of the invention described in the Specification of the Patent No. 8040
of 1886 granted to Zipernowsky, Déri and myself. The difference of potential at a
determined point of the low tension line may be maintained at the standard value by
suitable adjustment of the resistances in the high tension feeders supplying the trans-
formers nearest to the said point. By suitable adjustment of the resistances in all the
high tension feeders the tension at the various points of consumption may be
maintained nearly uniform and constant. The tension of the primary current at the

page_text: gonerating station should always be sufficient to supply the consumers at standard
tension even by the feeder which is subject to the highest load.
When the supply of electricity is diminishing, some of the feeders may be cut out
of circuit.
The adjustable resistances may havo automatic regulating devices controlled by the
return wires from the low tension conductors. Any form of automatic regulators
known in the art may be used.
In the accompanying drawing I and L2 are low tension distributing conductors,
supplying the various lamps or other consumption apparatus, indicated diagram-
matically as incandescent lamps. These nets L receive the current from the
transformers T. The transformers T', T2, T & T get the primary current by
special lines S', S³, S³, S* extending to each from the generating station C, while the
transformers T5, T6, T', T, T° and T10 are supplied from the high tension net P, which
is itself supplied by three feeders, S5, S6 and S7. R are the adjustable resistances in
the high tension feeders and m the return wires for ascertaining at the generating
station the tension at the points of consumption.
By the above described arrangement it is possible with a moderate number of high
tension mains to supply the low tension current to an extensive net of distributing
conductors at a nearly uniform and constant tension and there is no necessity for a
line of high tension conductors for each point of consumption.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
In distributing electricity with alternating currents, an arrangement whereby
consumers are supplied from one or more nets of conductors receiving low tension
secondary currents from transformers, the primary coils of which are supplied with
high tension currents either directly from the electrical generator or from a net of
conductors supplied from the generator, the high tension conductors being provided
with adjustable resistances or self induction coils, substantially as and for the purpose
set forth and as illustrated by the accompanying drawing.
1000
ABEL & IMRAY,
Agents for the Applicant.