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Frank Strenk PE, Electrical Engineer
Registered PA, NJ, DE, MD, NY
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Response Engineers
521 North Fourth Street
Telford, PA 18969-2132 |
Telephone:
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215-723-4226
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A professional electrical engineer
located in the Philadelphia area
specializing in short circuit, coordination and arc flash
studies.
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Frank@ResponseEngineers.com
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| NFPA 70E Arc Flash
Analysis |
In an arc flash study, the incident energy and arc flash
boundary are calculated for each location of the power
system. Protective clothing requirements are specified
for working near energized buses. Warning labels are
provided to be placed on the system equipment. The arc
flash label lists important information such as Flash Hazard
Boundary, Incident Energy and the given Working Distance,
PPE, (Personal Protective Equipment) Hazard Category, and
the boundaries for Limited, Restricted, Prohibited
Approaches.
Vital input data for an Arc Flash Study is taken from the
Short Circuit Study and the Overcurrent Protective Device Coordination
Study which must be performed first. |
| More information:
Arc Flash Analysis |
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| Overcurrent Protective Device Coordination |
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| A coordination study is an engineering
study that provides the selection and settings of protective
devices so as to isolate short circuit or overloads to only
the affected area. The circuit breakers and
fuses are set such that the protective device just upstream
of a fault will operate. Proper coordination prevents,
in most cases, a larger than necessary blackout from
occurring. The method of determining proper coordination settings is by plotting the “time-current characteristic” (TCC) curves of all series devices on a single overlay sheet of log-log coordination graph paper.
Response Engineers provides
Coordination Studies, often less expensive and usually
with faster delivery than switchgear manufacturers.
More information:
Short Circuit & Coordination Studies
Member: Electrical
Association of Philadelphia
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