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Electrical Codes, Standards, Recommended Practices and Regulations
book

Electrical Codes, Standards, Recommended Practices and Regulations

by Robert J. Alonzo
January 2010
Intermediate to advanced content levelIntermediate to advanced
512 pages
18h 35m
English
William Andrew
Content preview from Electrical Codes, Standards, Recommended Practices and Regulations
CHAPTER 11
Transformers, Capacitors, and Reactors
Transformers
A transformer can be defined as an electromagnetic device comprised of two or more windings
(coils) coupled by a mutual magnetic field. The coils consist of a primary winding and
a secondary winding. The primary winding is normally connected to an Alternating-Voltage
power source, which creates an alternating magnetic flux linking both windings.
In an ideal transformer, the transform voltage is directly proportional to the ratio of the
primary and secondary winding turns (N
1
¼ number of primary winding turns and N
2
¼
number of secondary winding turns) and can be represented by
V
1
¼
N
1
N
2
V
2
(Eq. 11.1) ...
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ISBN: 9780815520450