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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
Inductance and capacitance in installation work
3.1 A
(To
scale)
a
^
=
240V
3.1 A
\
\
\
\
b
8A
1/=240V
Diagram 48
Therefore the phasor diagram for the capacitor is Diagram 48a.
Combining both phasor diagrams, we have Diagram 48b. By
measurement:
/
= 6.2 A
= 24.5°
.*.
P.F. = cos α
P.F.
= cos 24.5°
= 0.91 lagging
Inductors
and capacitors in fluorescent lighting
The common fluorescent lamp consists of a glass tube filled with
mercury vapour at a low pressure, and a little argon gas. The inside of
the tube is coated with a fluorescent powder. There is an element at each
end of the tube whose terminations are taken outside the tube to metal
pins ...
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Publisher Resources

ISBN: 9781483106205