Arc Flash is a fast growing field of electrical engineering power
safety in North America. Many standards and regulations have been
written and continue to be revised on this topic including NFPA 70E,
IEEE1584. Most North American Electrical Codes make some reference
to the requirement of an arc flash safety analysis for low and
medium voltage distribution equipment in industrial plants.
In Ontario and across Canada, arc flash compliance is becoming a
reality. The best way to prevent a visit from the authorities and
avoid an arc flash incident in your facility is to be proactive in
protecting your electrical personnel.
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The Hazards |
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Arc flash is a dangerous condition associated
with the release of energy caused by an electric arc. An
electric arc flash can occur if a conductive object gets too
close to a high-amp current source or by equipment failure
(for instance, while opening or closing disconnects).
The primary hazard in an arc flash event is the thermal
hazard. The arc can heat the air to temperatures as high as
35,0000 F, and vaporize metal in the equipment. The arc
flash can cause severe skin burns by direct heat exposure
and by igniting clothing.
Secondary hazards include pressure and auditory hazards,
projectile hazards and inhalation hazards. The heating of
the air and vaporization of metal creates a pressure wave
(300 lb/ft2) and can damage hearing, causing sound levels to
exceed 160dB resulting in possible memory loss and other
injuries. Molten metal and parts are also ejected with high
momentum. Inhalation of extremely hot air, molten metal and
vaporized metal, as well as burning insulation smoke and
fumes can do significant damage to the lungs. |
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How Wintek Can Help You
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WINTEK Engineering Limited
uses the latest IEEE methods for calculating arc
flash and determining appropriate PPE. Our skilled
engineers have been trained with the latest arc
flash and coordination software.
WINTEK staff can help you identify arc flash
boundaries, flash hazard, and category of PPE
required for live work on electrical equipment in
your facility. We will work with you to develop an
arc flash safety program for your electrical
workers. We can also help you lower arc flash hazard
at desired points in your plant effectively lowering
the level of PPE (personal protective equipment)
required, but more importantly, lowering the danger
to your employees.
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