Protection Relay Application

An Intensive 3-day Training Course

Protection Relay Application

Protection Relay Application

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We currently have no scheduled session for this Course. If you are interested in running this course, please contact our Training Department at

Why Choose this Training Course?

Protection systems are installed in power system to prevent damages of electrical equipment by faults, to isolate a faulty part, and to maintain continuity of supply elsewhere in the system. Modern protection includes multiple protection functions as well as monitoring and recording features, self-diagnostics and analogue and digital data. Although the primary role of protective relays is to perform protection functions, relays also provide additional data and some control functions.

The Protection Relay Application training course is interactive and encourages delegates to participate through questions and answers. Case studies help further in better understanding the discussed topics.

The Protection Relay Application training course will cover the following:

  • Power System Fault Analysis
  • Current and Voltage transformers
  • Protection Concept
  • Over Current and Earth Fault Protection
  • Pilot Wire and Distance Protection
  • Transformer Protection
  • HV Circuit Breakers principle of operation and maintenance
  • Principles of LV motor starts protection and maintenance

What are the Goals?

  • Understand various electrical faults and their effects on the system
  • Learn how to calculate faults
  • Understand the purpose of protection systems and their basic operation
  • Identify types of protection, required for different applications
  • Appreciate the impact of current and voltage transformers transformers in correct operation of protection
  • Understand Circuit Breaker operation and maintenance requirements
  • Understand LV Motor starts and associated issues

Daily Agenda

Day One: Introduction to the Training
Power System Fault Analysis
  • Power Systems Overview
  • Faults in Power Systems
  • Fault Effects on the Power System
  • Fault Current
  • Short Circuit Calculation Method
  • Symmetrical Components
  • Modelling Components
  • Short Circuit Calculation Procedure
Circuit Breakers
  • Types of operation Overview
  • Principles of operation
  • Maintenance requirements in Asset Management
Introduction to Protection
  • Protection Role
  • Protection Objectives
  • Protection Requirements
  • Protection Basic Principles
  • Protection Types
  • Protection Function Codes
  • Numerical Protective Relays
Day Two: Current and Voltage Transformers
  • Current Transformers Theory
  • Current Transformer Characteristics
  • Accuracy Class & CT Errors
  • CT Magnetizing Curve
  • Current Transformer Connections
  • Current Transformers Earthing
  • Protection Requirements on CT
  • Voltage Transformers Theory
  • Voltage transformer characteristics
  • VT accuracy & VT errors
  • VT Performance Issues
  • Voltage Transformer Connections
  • Voltage Transformers Earthing
Overcurrent Protection
  • OC Protection Principle
  • OC Protection Requirements
  • OC Protection Characteristics
  • Directional OC protection
  • OC Protection Applications
Earth Fault Protection
  • EF Protection Principle
  • EF Protection Requirements
  • EF Protection Characteristics
  • EF Protection Typical Data
  • EF Protection Applications
Day Three: Transformer Protection
  • Transformer Faults
  • Magnetizing Inrush Current
  • Transformer Protection Requirements
  • Transformer Protection Concept
  • Transformer Differential Protection
  • Restricted Earth Fault Protection
  • HV overcurrent protection
  • LV overcurrent & earth fault protection
  • Neutral earth fault protection
  • Transformer Mechanical Protection
  • Earthing Transformer Protection
  • Transformer Feeders Protection
Feeder Protection
  • Feeders in Power Systems
  • Pilot Wire Protection
  • Pilot wire protection application
Motor Protection
  • Induction motor protection
  • Protection requirements
  • Thermal considerations
  • General considerations
  • Stalling of motors
  • Too many starts
  • Operation of three-phase induction motors on unbalanced supply voltage
  • Equivalent circuits of motor
  • Single phasing
  • Electrical faults in stator and rotor windings
  • Short circuits between phases (internal to motor)
  • Relay to be considered
  • Short circuit to earth
  • Undercurrent, underpower, undervoltage
  • Differential protection
  • Undervoltage during running
  • Undervoltage at start-up
  • Additional protection for synchronous motors
  • Example of multifunctional relay
  • Protection co-ordination with the system


  • On successful completion of this Training Course / Online Training Course, a PetroKnowledge Certificate / E-Certificate will be awarded to the delegates.

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Frequently Asked Questions

  • To register online through our website, please click “Enroll Now” on the course page, complete and submit the form. A confirmation e-mail and instructions will be sent to the participant’s e-mail.
  • You may also get in touch with our Registration Team on
    +971 50 981 7386 | +971 2 557 7389 or send an email to

  • Payments can be made in USD or UAE local currency AED (Arab Emirates Dirhams) either by Bank Transfer or by Credit Card. Our Bank Account details will be provided on the invoice.
  • Course fees are payable upon booking unless a valid, authorized Purchase Order is provided and accepted.
  • Invoices will be sent via email/courier to the ID/name and address provided.
  • The course fee shall be settled prior to course start date. Corporate payments with existing payment policy shall be relayed to us in advance.

Upon successful registration online, enrolment on the respective training course will be confirmed by Registration Team by e-mail along with the invoice and joining instruction.

For corporate fees and group registration, please send your query to

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