No substation equipment, motor control centers, breaker panels, etc. can be purchased
without knowledge of the complete short circuit values for the entire
power distribution system.
The short circuit calculations must be maintained and periodically updated
to protect the equipment and the lives. It is not necessarily safe to
assume that new equipment is properly rated.
BENEFITS OF SHORT CIRCUIT STUDY
DELIVERABLES OF SHORT CIRCUIT STUDY
A typcial short circuit study includes:
- • Short circuit calculations, which highlights any equipment that is
ascertained to be underrated as specified
- • Suggested modifications to rectify the underrated equipment; (trip
sizes within the same frame, the time curve characteristics of induction
relays, CT ranges, etc.).
The Protective Device Setting and Coordination Study is the suggested
follow on analysis to develop the coordination curves, highlighting areas
lacking coordination. Presentation of a protecitve device study would
includ a technical evaluation with a discussion of the logical compromises
for best coordination.
FAQs about SHORT CIRCUIT STUDIES
What are Short Circuit Currents?
Short-Circuit Currents are currents that introduce large amounts of destructive
energy in the forms of heat and magnetic force into a power system, as
indicated by IEEE 242-1986, IEEE Recommended Practice for Protection and
Coordination of Industrial and Commercial Power Systems.
Risks Associated With Short Circuit Currents?
The building/facility may not be properly protected against short-circuit
currents. These currents can damage or deteriorate equipment. Improperly
protected short-circuit currents can injure or kill maintenance personnel.
Recently, new initiatives have been taken to require facilities to properly
identify these dangerous points within the power distribution of the facility.
Contact Us for a Free Consultation on Your Electrical Short Circuit Study Needs.