Modern Instantaneous Selectivity, The Code, Arc Flash and System Reliability

Subject:  Modern Instantaneous Selectivity, The Code, Arc Flash and System Reliability

Speaker:  Marcelo E. Valdes

Designing safe and reliable electrical distribution systems consistent with the mission of the system and conscious of budgetary and schedule limitations has always been the intent of the good electrical systems designer. However, in recent years, increasing focus on arc flash and electrical safety as well as clauses within various codes have influenced the electrical designer to considerthe compromise between protection and system reliability differently. Achieving selectivity at the expense of protection, or protection at the expense of selectivity is neither desirable, nor consistent with good engineering practice anymore. Luckily manufacturers have provided product solutions and associated analytical techniques that allow designers to offer excellent protection and significant selectivity simultaneously. Understanding how protective devices really work and how to implement them is the key to achieve the potentially competing goals of maximum protection and maximum selectivity simultaneously.
Marcelo E. Valdes has been with GE 36 years in various assignments including field engineering, sales and marketing management. Currently he is manager of Application Engineering for GE’s Industrial Solutions business based in Plainville Connecticut. Marcelo has published mover 20 papers in IEEE conference journals, IEEE IAS Transactions, IAS magazine and other industry publications. He has 13 patents and over 30 applied for in the area of circuit breaker trips and protection algorithms. His patents and papers primarily focus on selectivity and arc flash energy mitigation. Marcelo is chair of an IEEE project to produce a guide for the specification of safer Motor Control Centers, and an active participant in various IEEE working groups developing the IEEE Dot standards that will replace the IEEE color book as well as IEEE 1584 “Guide for Arc Flash calculations” and other standards relating to circuit breakers and electrical safety. Currently Marcelo serves as the NEMA alternate representative to Code Panel 17 for NFPA 70. Mr. Valdes is the past Vice Chair of the 2012 and 2013 IEEE Electrical Safety Workshop and Chair of the IEEE 2014 Electrical Safety Workshop to be held in San Diego California.
Tuesday May 28, 2013
5:30 pm (Arrival/relax time)
6:00 pm (Presentation)
7:00 pm  (Dinner)
Sinbad’s Restaurant
Pier 2 The Embarcadero
San Francisco, CA  94111   415.781.2555
(short walk from Embarcadero BART)
$25 (At the door).  
Student Members:
$10 (at the door) discounted cost for first 5 reserved IEEE Student Members.

Brandon Yee  (510) 220-4486
YEI Engineering