The elements of alternating currents by unknow

Author:unknow
Language: eng
Format: epub
Tags: Electric currents, Alternating. [from old catalog], Electric generators, Electric transformers, Electric motors
Publisher: New York, The Macmillan company;
Published: 1901-03-25T05:00:00+00:00

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The number of secondary turns is then determined by equation (61) namely,

i\^" = |^V' (70)

ELEMENTS OF ALTERNATING CURRENTS.

From the provisionally designed core the mean length of a' turn of primary and of secondary coils may be determined which together with N^ and iV" gives the total lengths of wire in primary and secondary. The size of this wire is then easily chosen so that R^I'^ and R'T'^ may be each equal to half the full-load copper loss.

The size of wires being thus determined the space necessary for the coils and insulation can be estimated. If the provisionally designed core gives more or less space than is required for the coils its dimensions may be altered to suit.

Transformer Connections. 105. Simple connection. In parallel. In series.—When used to supply current to lamps or motors from constant potential

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jnain

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circuii circuif circuif

Fig. 122.

mains the primary of the transformer is connected to the mains and the secondary of the transformer is connected to the terminals of the receiving circuit. When a number of receiving circuits

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