• Cancellation Policy

Seminar Description

Assuming the attendee has a working knowledge of short circuit analysis of power systems, this course will describe how to apply and set overcurrent protection systems. Topics include applications of fuses, reclosers, and overcurrent relays to provide coordinated short circuit protection of radial distribution systems. This includes overcurrent protection of busses, transformers, lines and cables.

Topics will include:
•  Overview of grounding practices for distribution system neutrals (ungrounded, high, or low impedance grounded or solidly grounded)
•  Time/current characteristics of overcurrent protection devices
•  Time/current damage curves of conductors and transformers
•  Application and selection of fuses for protection of distribution systems
•  Discussion of measured quantities, phase, ground, or negative sequence currents
•  Selection and setting of circuit reclosers
•  Measuring principles of time and instantaneous overcurrent relays
•  Selection and setting of time and instantaneous overcurrent relays
•  Coordination of relays, fuses and reclosers with each other
•  Protection complications introduced by networked systems and/or distributed resources connected to traditional radial distribution systems
•  Techniques for “load blinding”
•  Relaying accuracy of current transformers

The short circuit computer program ASPEN OneLiner will be used as an example of a computer tool for protective device coordination. However this is not a training seminar on the use of ASPEN OneLiner.

Due to time limitations, protection of motors, and generators is not included. Also discussion of differential protection systems is not included. Previous participation in the APEGBC companion seminar “Short Circuit Analysis of Power Systems” would be helpful, but is not a prerequisite as long as the attendee has a working knowledge of short circuit analysis techniques.

Instructor

Charlie F. Henville, P.Eng., President, Henville Consulting Inc.

Charlie Henville is a specialist in electric power system protection. After a thirty year career with BC Hydro, he retired in 2005 from the position of principal engineer. He now runs his own consulting company in power system protection. Charlie is well experienced in training engineers in power systems. He is adjunct faculty at the University of Wisconsin and the University of BC, and has presented training courses to working engineers world wide. He is a Fellow of the Institute of Electrical and Electronic Engineers, and a past recipient of APEGBC's President's Award for professional service. For a more detailed resume, please visit: http://www.henvilleconsulting.com .

What Previous Participants have said about this Seminar:

• "Very good instructor. Has a good knowledge of the industry."
• "The seminar content was excellent with many examples from utility."
• "Charlie is an excellent speaker/presenter. Everything was easy to follow, handouts and materials were clear, and the pace was good (not too slow, not too fast)."

Cancellation Policy

Registered attendees unable to attend the event may designate a substitute, provided APEGBC receives written notification at least one business day prior to the event. Registration information for the substitute attendee should accompany the notice. If notice of cancellation of registration is received:

•  5 business days or more prior to the event, a refund will be processed
•  Less than 5 business days prior to the event, no refunds apply

Substitute registrants are permitted up to the day of the seminar and member/non-member fees will be applied. The organizers reserve the right to cancel the event if less than the minimum required participants have registered. Liability limited to registration fee.

APEGBC is an AIBC/CES registered provider offering an AIBC-Accredited activity for 6.5 Core Learning Units.

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