This article was posted 04/21/2008 and is most likely outdated.

Arc Flash Hazard - Live Webinar
 

 

Subject - Arc Flash Hazard - Live Webinar

April 21 , 2008
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Arc Flash Hazard

Can HRG Technology play a role in prevention?

 

Live Webinar

Hosted by EC&M Sponsored by I-Gard

Thursday, April 24, 2008

2:00pm ET | 11:00am PT

 

ImageAttendees will be provided a short summary of grounding systems with particular emphasis on the prevalence of the solidly grounded system and the inherent arc flash hazard associated with this option.

 

We will explore the root causes of the hazard and then explore the following statement from the IEEE Std 141-1993 (Red Book)

Recommended Practice for Electric Power Distribution for Industrial Plants

 

7.2.2 There is no arc flash hazard, as there is with solidly grounded systems, since the fault current is limited to approximately 5A.

 

Attendees will be provided the rationale and technical understanding of how HRG technology can mitigate and reduce the arc flash hazard and the design considerations to remember when specifying and installing an HRG system.

 

ABOUT THE PRESENTER:

 

Sergio Panetta is the Vice President of Engineering at I-Gard and has been with us for 10 years. Prior to joining I-Gard, Sergio gained valuable industry experience in the design, manufacture and installation of switchgear.

 

Sergio is a licensed Professional Engineer in the Province of Ontario and holds both a Bachelor’s degree and a Master’s degree in Electrical Engineering.

 

For the past 3 years, Sergio has been conducting training seminars in High Resistance Grounding across North America and Asia.

 

Register now for this informative live webinar

 

 
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Comments

  • Resistance grounded systems do have an arc flash hazard to the extent that a phase-to-phase fault or 2 simultaneous ground fault occur. An example would be when a coal mining machine runs over its own power cord.

    Ungrounded systems that have any amount of overhead wiring or PVC conduit can pick up a nasty amount of static electricity during rainstorms. This was the first time that 480 volts blew up right in front of me when reenergizing a circuit. The previous time that 277Y480 blew up across the hall was when I deliberately reenergized a shorted ballast and I want to make sure that I did not have 2 shorted ballasts in the fixture.

    Oh yeah, if most 240 volt single phase or any voltage 3-phase motor controllers are in the off state the downstream wiring is essentially an ungrounded system. If lets say you have motor wiring running overhead from a well pump controller to a well pump or irrigation pump there could be enough static electricity buildup during a rainstorm to toast the motor.

    Michael R. Cole
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