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Modern Electrical Installation for Craft Students, 3rd Edition
book

Modern Electrical Installation for Craft Students, 3rd Edition

by Brian Scaddan
November 2013
Intermediate to advanced content levelIntermediate to advanced
182 pages
6h 6m
English
Newnes
Content preview from Modern Electrical Installation for Craft Students, 3rd Edition
56 Cells, batteries
and
transformers
R
varied
to
keep
current
constant
Diagram 67 Constant-current charging
Cells,
batteries
and
their associated charging equipment
are
frequently used
in
installation work such
as
indicator
and
call systems
in
hospitals
and
hotels, fire alarm
and
burglar alarm systems,
and
emergency lighting installations. Whatever
the
application, somewhere
in
the
circuitry
of
either
the
main
or the
charging system, transformers
and rectifiers
are
used.
Transformers
As we have seen
in
Chapter
1, two
coils that
are
wound
on the
same iron
core have
the
property
of
mutual inductance, because
a
change
in
flux,
and hence
in e.m.f. ...
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Publisher Resources

ISBN: 9781483106205