Practical Talks on Electricity by William Baxter

Author:William Baxter
Language: eng
Format: epub
Publisher: The Engineer Publishing co.
Published: 1905-03-25T05:00:00+00:00

FIGS. 129 AND 131.

and iV are the bus l)ars. The ammeter is shown at A, an

will 1)0 seen tlie wire b from the generator runs to it in prec

tlie same manner as in Fig. 129. The instrument is conm

with the upper bus /^ by means of wire d. From bus /

current passes out to the distributing circuits and returr

l)us N, from which it goes back to the generator through wi

In actual switchboards, a main switch is located at the ;

marked S, and the path of the current is apt to be lost at

point, which fact accounts, in a measure, for the difficult)

perienced in tracing ov\t t\\e ttwc: covmo-cXxows. In most (

in addition to the main sw\tc\\ at S, ^ c^To^:\\.V^s^RRx'vs.'wj

at rb, ^vhich still fitrther cotnpWca^es vV^ c,o^vy.^^<\««

AMMETERS AND THEIR CONNECTION.

183

iratus shown at R is the field regulator by means of which voltage of the current is adjusted.

If an ammeter is connected as shown in Fig. 129 it will cate the strength of the current that flows in the external ait, but it will not chow how much current flows through armature of the generator. As a rule we do not care to w exactly the strength of the current flowing through the ature, but if it is desired to ascertain this, we can find it

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