Electrical System Protection Coordination:
A Technical and Hands-On Workshop on Electrical Design Combined With
Protection Coordination
Topics to be discuss:
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Basic power system design and protection
Load Flow Analysis
Short Circuit Calculations
Instrument Transformer
Coordination Studies
Selection and Application of protective devices
o Fuses
o HV Fuses
o LVCB
Ground Fault Protection
Equipment Protection
o Conductor
o Motor
o Transformer
o Generator
o Bus and Switchgear
o Service Supply Line
Overcurrent Coordination
Overcurrent Characteristic curves
Protective Relay Setting and Testing
Course Background
An important step in the design of any power distribution system is the time-current coordination of all
overcurrent protective devices required for the protection of the system and the connected equipment.
When a short circuit or an abnormal power flow occurs for a sustained period of time, the protective
devices should react to isolate the problem with minimum disruption to the balance of the system. This
is the goal of a well-coordinated electrical power system. The reader should be aware that this chapter
addresses only one aspect of system protection: overcurrent protection. For most large, mediumvoltage systems, overcurrent protection acts only as backup for primary protection and, as such, this
chapter is not a complete study of system protection. The operation of protective devices can be
estimated by graphic representation of the time-current characteristics curves (TCCs) of these devices.
By plotting these characteristics on a common graph, the relationship of the characteristics among the
devices is immediately apparent. Any potential trouble spots, such as overlapping of curves or
unnecessarily long time intervals between devices, are revealed. By indicating on the current scale the
maximum and minimum value of short-circuit currents (three-phase and line-to-ground) that can occur
at various points in the circuit, the operation of circuit protective devices can be estimated for various
fault conditions. An accompanying single-line diagram can indicate the components and define their
location in the circuit. (IEEE 242 Buff Book)
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Who should attend:
This course will demonstrate understanding and apply actual solutions for Power System Studies:
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Design Engineers
Project and/or Construction Engineer
Maintenance Engineer
REE or graduate of Electrical Engineering
Facilities Engineer
Course Outline:
At the end of the program, the participants will be able to:
 Enumerate the fundamental, principles of load flow analysis, short circuit analysis and
protection coordination.
 Solve short circuit problems in relation to actual practices.
 Analyze and examine theories, formulas and techniques for power system analysis: per-unit
calculations, symmetrical components, fault calculations,
 Create and build power flow studies and its application.
 Interpret overcurrent protection of power system.
 Compute and analyze the use of protective devices: fuse, circuit breaker and overcurrent relays
 Generate a protective device studies using software (Paladin DesignBase formerly EDSA)
 Apply power system software studies to actual protective relay
 Prepare relay settings and conduct simulated tests on protective device using Power System
Simulator Test Set (DOBLE F6150).
Day 1- 8 Hours
A. BASICS OF POWER SYSTEM DESIGN AND PROTECTION
 Overview
 Analysis Involved for protection and design
 Per unit system
 Sequence Components
 Power System Software
B. LOAD FLOW ANALYSIS
 Overview
 Objectives of Load flow analysis
 Theory behind load flow
 Verification of equipment KVA and Current flow limits
 Verification of protective device capacities
 Application of load flow analysis
 Values needed for coordination
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Hands-on load flow analysis using power system software (Paladin DesignBase formerly
EDSA)
C. SHORT CIRCUIT STUDIES
 Overview
 Importance of short circuit analysis
 Theories
 Symmetrical and asymmetrical currents
 Verification of Available short circuit currents
 Interrupting rating and withstand rating
 Values needed for coordination
 Hands-on short circuit analysis using power system software (Paladin DesignBase
formerly EDSA)
Day 2- 8 Hours
D. Protection Coordination Studies
 Overview
 Selectivity Rules
 Time Current Characteristic Curves
 Time Margins
 Practical Exercises
E. Selection and Application of protective devices
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Fuses
HV Fuses
LVCB
F. Ground Fault Protection
G. Equipment Protection
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Conductor
Motor
Transformer
Generator
Bus and Switchgear
Service Supply Line
Day 3- 8 Hours
H. Basic Instrument Transformer Sizing
I. Protection Coordination Using EXCEL
J. Protective Relay Hands-on using Relay Test Set (DOBLE F6150)
 Actual Setting of Relays (BASLER Relays)
 Basic relay Logic Orientation
 Hands On - Testing of overcurrent relay device:
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Profile of Facilitators and Technical Experts:
Engr. Chris Tabios, REE
A highly trained electrical engineer in power system simulations. He conducts power system studies for
commercial and industrial companies that require intrinsic data analyses to protect their electrical network from
uncoordinated protective relays, unknown fault currents and the computations for arc flash ratings to protect the
maintenance team for untoward accidents at site. He graduated from Mapua Institute of Technology with the
degree BS Electrical Engineering with good scholastic background and passed the Board of Electrical Engineering
Licensure immediately after graduation.
Engr. Felgie C. Magla-oy, REE
Engr. Magla-oy gained his experience as a Power System Planning Engineer at the Visayan Electric Company (VECO)
for four (4) years. Distribution Line and Substation Sizing Optimization, Substation Siting and Load Flow Analysis
using SynerGEE Software are some of his know-how. With his Power System background, he is now the Protection
Engineer of WESTCO Electrical and Equipment Corp.
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Registration Form
Course Title
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(to appear on certificate)
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Billing and coordination purposes:
Company contact person
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Company TIN
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About PAMAV Training Institute and Technology Center, Inc. (PamavTech)
PamavTech was formed in 2005 to offer competency training programs and continuous education that offers up-to
date skills and knowledge thru exposure to various current industry practices. We are a pioneer training center in
the Philippines that offers competency-based training for Engineering professionals.
PamavTech offers public and in-house training seminars
Courses available
Technical Programs
Substation Maintenance
Insulation Power Factor with Hands-On
Power Quality and Harmonics
Power System Simulation Analysis
(Power Analytics - Paladin DesignBase Software)
Thermal Imaging
Professional Development Programs
Happy at the Workplace Modules
- Time and Stress Management
- Health and Nutrition
- Team building
Engineer to Leader Modules
- Shifting to Corporate Image and Business
Etiquette
Effective Communication Skills
Protective Relaying
Leadership Skills
- Project Management
- Business Planning
PamavTech contact information
Address: 7th Floor Integrated Professional Office Building, 14 Quezon Avenue, Quezon City,
Philippines 1113.
Telephone: (+632) 742 2637 / 261-5615
Website: www.pamavtech.com
Mobile: +63918 907 5383
Email: contact@pamavtech.com
Facebook: www.facebook.com/pamavtech.com
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