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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
Surge Protection Devices (SPD)
Electrical distribution lines can sometimes be subjected to transient overvoltages (TOV) and
power surge conditions. The creation of those conditions can be related to several causes.
Transient overvoltage conditions can be caused by the following [3]:
(a) Line-to-ground fault, particularly on an ungrounded or resistance-grounded system
(b) Loss of neutral ground on a normally grounded system
(c) Sudden loss of load or generator overspeed, or both
(d) Resonance effects and induction from parallel circuits
Direct lightning strikes can inject a significant current surge on a distribution line. Also,
lighting strikes within ...
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Publisher Resources

ISBN: 9780815520450