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Course Overview

Power Systems can be prone to deficiencies mainly due to lack of proper insulation or other peripheral causes. When a fault in a power system occurs, the normal features of the system could become unstable. With more complicated systems, it is crucial to identify the point of fault accurately and trip only those segments affected by the error while the rest of the structure can continue to run naturally. Therefore, it is essential to prevent, detect and/or fix electrical faults as efficiently as possible. This course covers the relevance and testing mechanisms of electrical power system protection, including real-world exercises and demonstrations merged with the technical concepts behind it.

What content does the Electrical Power System Protection feature? At a glance, the following areas will be covered in this course:

  • Concepts of protective relaying and security mechanisms
  • Radial system and scheduled overcurrent protection
  • Electromechanical relay functioning and microprocessor applications
  • Instrument transformers
  • Pilot protection and differential and distance relays

Overall, this Zoe training course will empower you with knowledge in protecting power system effectively in order to avoid hazardous situations in your surroundings. It will provide you with the aptitude that is vital to calculate fault currents, choose relays and relevant transformers suitable for each type of system. Our workshops also allow participants to apply the techniques learned in the training course in real-world situations.


Course Objectives

Upon completing this course successfully, participants will be able to:

  • Identify instrument transformers for protection applications
  • Understand protective relaying viewpoints and select applicable protection plans
  • Plan an accurately synchronised overcurrent protection system for radial distribution
  • Recognise how electromechanical relays work and how they are imitated by microprocessors
  • Design protection schemes employing pilot protection with differential and distance relays

Training Methodology

This is an interactive training program and will consist of the following training approaches:

  • Lectures
  • Videos
  • Seminars & Presentations
  • Group Discussions
  • Demonstrations
  • Assignments
  • Case Studies & Functional Exercises

Just like all our courses, this program also follows the ‘Do-Review-Learn-Apply’ model.


Organisational Benefits

Companies who send in their employees to participate in this course can benefit in the following ways:

  • Reduce unnecessary power system downtimes in your organisation
  • Obtain customised solutions to help correct the problem areas with your equipment
  • Follow trusted and recommended settings for trip circuit breakers and relays
  • Increase coordination between devices and identify deficiencies in system protection to prevent hazards
  • Benefit from various deliberations on the use of system devices with respect to national electric code requirements and the applicable ANSI/IEEE specifications

Personal Benefits

Professionals who participate in this course can benefit in the following ways:

  • Identify the different parts of protection systems
  • Learn the fundamentals of electrical power security
  • Setup basic relay settings independently
  • Distinguish between various fault types
  • Execute straightforward fault and design calculations
  • Select suitable protection tools for different apparatus
  • Justify the protection systems in your current plant, recognise their functions, discover any limitations and rectify any issues in a proactive manner
  • Make more educated decisions on electrical power system protection
  • Enhance the safety policies of your site significantly

Who Should Attend?

This training course can be attended by a wide range of individuals including:

  • Electrical Engineers, Supervisors or Technicians responsible for the use or maintenance of electrical protective gear
  • Engineers and technicians fresh to the power industry
  • Employees tasked with evaluating the effectiveness of security schemes
  • Intermediate-level engineers and technicians accountable for power system protection
  • Engineers and consultants who manage security studies
  • Professionals engaged in creating protection schemes to develop system dependability

Course Outline

MODULE 1: Overview of Power Systems

  • Electrical distribution system
  • Basic circuit breaker design Protection introduction
  • Reading single line diagrams Phasor math
  • LV, MV AND HV equipment Per-unit calculations
  • Symmetrical components
  • Function and types of electrical switchgear Sequence networks

MODULE 2: Fundamentals of Protection in Power Systems

  • Basic requirements and components
  • Need for protective apparatus
  • Microprocessor-based relay implementation
  • Instantaneous and time overcurrent relays
  • Electromechanical relay operating principles
  • Device coordination

MODULE 3: Categories of Faults and Short Circuit Currents

  • Symmetrical units
  • Unbalanced faults and earth faults
  • Calculation of short circuit MVA
  • The development of simple distribution systems
  • Equivalent diagrams for reduction of system impedance
  • Fault-types, effects and calculations

 MODULE 4: System Earthing and Earth Faults

  • Effect of electric shock on human beings
  • Sensitive earth leakage protection
  • Phase and earth faults
  • Comparison of earthing methods
  • System classification
  • Protective earthing

MODULE 5: Circuit Breakers with Built-in Protection

  • Circuit breakers with in-built protection
  • Conventional and electronic releases
  • Fuse operating characteristics, ratings and selection
  • Performance under fault conditions
  • Protective relay-circuit breaker combination

MODULE 6: Relays and Auxiliary Power Apparatus

  • Theory of construction and operation of protective relays
  • Communication capability
  • Factors influencing choice of plug setting
  • Why breakers and contactors fail to trip
  • Universal microprocessor overcurrent relay
  • Future of protection for distribution systems
  • Necessity for consistent auxiliary power for protection systems
  • Technical features of a modern microprocessor relay
  • Trip circuit supervision
  • Capacity storage trip units

MODULE 7: Protection Classification and Relay Coordination

  • Design considerations of MV and LV networks
  • Basis of selectivity
  • Time-current grading
  • Coordination between circuits of transformers
  • Importance of settings and coordination curves

MODULE 8: Unit Security and Functions

  • Unit protection systems – recommendations and advantages
  • Protective relay systems
  • Differential protection
  • Main, unit and back-up protection
  • Machine, transformer and switchgear protection
  • Feeder pilot-wire protection

 MODULE 9: Safety of Feeders and Lines

  • Use of carrier signals in line protections
  • Over current and earth fault protection
  • Unit and impedance protection of lines
  • Auto-reclosing relays for transmission and distribution lines
  • DMT and IDMT arrangements applied to sizeable systems
  • Temporary faults and use of auto reclosing as a means of reducing outage time

MODULE 10: Protection of Machinery

  • Motor protection basics
  • An introduction to generator protection
  • Transient and steady state temperature rise
  • Typical protective settings for motors
  • Thermal time constant
  • Unbalanced supply voltages and rotor failures

 MODULE 11: The Future

  • The new age in protection – microprocessor, static and conventional
  • Personal protective equipment (PPE)
  • Intelligent sectionalizing
  • Shock hazard versus burn/blast hazard
  • Hazard labelling
  • IEEE 1584 and NFPA 70E
  • Communication-based overcurrent protection
Note
Customized Schedule is available for all courses irrespective of dates on the Calendar. Please get in touch with us for details.
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