
SERVICE
Short Circuit / Coordination Study
Short Circuit and Coordination Study
A
Short Circuit and Coordination Study is critical for the safe,
efficient, and economical operation of any electrical distribution
system. A Short Circuit Study will help to ensure that personnel and
equipment are protected by establishing proper interrupting ratings of
protective devices (circuit breaker and fuses). If an electrical fault
exceeds the interrupting rating of the protective device, the
consequences can be devastating, including injury, damaged electrical
equipment, and costly downtime.
A
Coordination Study maximizes power system selectivity by isolating
faults to the nearest protective device, as well as helping to avoid
nuisance operations that are due to transformer inrush or motor
starting operations.

A
Short Circuit and Coordination Study is a very important, yet sometimes
an overlooked step after the initial design and before the
implementation of an electrical distribution system. The NEC addresses
the importance of this type of study in articles 110-9, 110-10, 240,
and 517.17. It is clear that a third party, independent study performed
during/after the equipment submittal process, can prove to be
invaluable. A Short Circuit and Coordination Study serves to
incorporate all the system changes that come about after the initial
design. Some examples of factors that commonly change in the
implementation of a system are: the utility available fault level, size
and/or transformer impedance values, conductor size/type, addition of
motors, and the system
operating parameters.
If you are in need of or considering a Short Circuit and Coordination Study, call us at 516-536-2600 or EMAIL US. You can CLICK HERE to download a sample report.
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