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April 13, 2010

Mtg: Approaches to Arc Flash Hazard Mitigation

by @ 3:07 pm. Filed under ALL, Electrical/Power

THURSDAY May 13, 2010
OEB Industry Applications Chapter
Speaker: Gary H. Fox, Senior Specification Engineer, GE Industrial Solutions
Time: Demo trailer at 3:00 PM; No-host social at 5:30 PM; Presentation at 6:15 PM; Dinner at 7:15 PM; Presentation continues at 8:00 PM
Cost: Dinner is $20 for IEEE members; $25 for non-members
Place: Marie Callender’s Restaurant – The Garden Room, 2090 Diamond Blvd, Concord
RSVP: Please respond by May 12 to Gregg Boltz,,? 925-210-2571

This evening there will be two presentations related to Arc Flash Hazard Mitigation:
1.? Advanced breaker trip unit technologies, including zone selective interlock, maintenance mode, and enhanced time current curve adjustment options can limit let-through energy and reduce arc flash hazards without compromising system selectivity.? This presentation will illustrate through a case study approach the amount of arc flash incident energy reduction that might be realized at typical low voltage unit substations.
2.? The predominant technologies for reducing arc flash incident energy today rely on the speed of protective devices, remote operation, arc-resistant enclosures that channel energy where it is less dangerous, and crowbars to divert the arc energy into a bolted fault.? None of these methods has provided a solution for all situations, particularly in existing installations.? The second presentation will describe a method for diverting an arcing faultâ??s energy into a specific environment within a half-cycle after initiation of the arc, without the need to introduce bolted fault current like a crowbar or for fast current interruption, such as a current-limiting fuse.? The system protection provided is similar to that of arc-resistant switchgear without reliance on the strengthening or integrity of the equipment enclosure.
Please note that a GE demonstration trailer with a sample of the device described in the second presentation (along with other notable exhibits) will be available for visiting from 3:00pm to 6:00pm in the parking lot outside the restaurant.

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