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June 15, 2010

Mtg: Short Circuit, Device Coordination, and Arc Flash Analysis

by @ 4:22 pm. Filed under ALL, Electrical/Power

TUESDAY September 28, 2010
SF Industry Applications Chapter
Speaker: Alberto Marroquin, P.E., Operation Technology, Inc
Time: Social at 5:30 PM; Presentation at 6:00 PM; Dinner at 7:00 PM
Cost: $30 (at the door); $10 for student members. Email pre-registration qualifies the registrant for our drawing of an IEEE Color Book at dinner.
Place: Sinbadâ??s Restaurant, Pier 2 The Embarcadero, San Francisco
RSVP: by email, to Frank Sylvester, SFPUC,, 415-554-1578

This presentation will introduce some on the latest trends in short-circuit and device coordination and their relationship to arc flash analysis.? The presentation will also cover some new concepts which are in development and may become part of future editions of the existing guidelines like IEEE 1584 and NFPA 70E.? The protection schemes to be discussed include Zone Selective Interlocking and Selective Instantaneous Protection and their impact in the reduction of the incident energy exposure including simulation results for typical applications.? The presentation will also cover the latest trends in arc flash analysis from IEEE 1584 and NFPA 70E 2009 including systems not covered by any guidelines like low voltage systems fed by small transformers (less than 125 kVA @ 208 VAC) and direct current arc flash calculations which may be added to the next edition of NFPA 70E 2011.? The presentation will also touch on some relatively unknown special arc flash calculations for generation plants with transient short-circuit fault current contribution and special excitation protection including differential and field current discharge.

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