PROTECTION RELAY

OVERVIEW

Course Description

The continuity of the electrical power supply is very important to consumers especially in the industrial sector. Protection relays are used in power systems to maximise
continuity of supply and are found in both small and large power systems from generation, through transmission, distribution and utilisation of the power. A good understanding of their application, operation and maintenance is critical for operating and maintenance personnel. In this workshop, you will gain a thorough understanding of the capabilities of power system protection relays and how they fit into the overall distribution network. The practical sessions covering the calculation of fault currents, selection of appropriate relays and relay coordination as well as hands-on practice in configuring and setting of some of the commonly used types of protection relays used in industry will give you an excellent understanding. Simulation software and real relays (but at safe voltages) will be used to give the participants practical experience in setting up and configuring the various power parameters.

Who Should Attend?

Electrical Engineers, technicians and supervisors Instrument and control engineers, Process control engineers, technicians and supervisors, Etc.

Course Objectives

Upon completion of the course, participants will be able to:

  • Understand the fundamentals of electrical power protection and applications
  • Recognize the different fault types
  • Perform simple fault and design calculations
  • Understand protection system components
  • Perform simple relay settings
  • Choose appropriate protective devices for different equipment
  • Interpret the protection systems existing in your plant, understand their functions, detect any shortcoming and explain any undesired or uncoordinated relay operation
  • Make more informed decisions on electrical power system protection
  • Significantly improve the safety of your site
  • Identify the power system protective devices.
  • Test the power system protective devices.
  • Maintain the power system protective devices
  • Identify the protection devices in the electric power system
  • Test the protection apparatus

COURSE OUTLINE

  • Introduction to Protection
  • Basic Objectives, Requirements, Principles, Protection History
  • Power System Fault Analysis
  • Faults impact on system and equipment
  • Types of fault , Balanced, unbalanced
  • Single phase earth, Phase to phase faults, phase ground faults
  • Current Transformers
  • Current transformers principle, types, characteristics, Specification,
  • Earthing, Connections for current transformers
  • Voltage Transformers
  • Voltage transformers principle, types, characteristics
  • Voltage transformers, Earthing of voltage transformers
  • Overcurrent & Earth Fault Protection
  • Overcurrent (OC) & Earth Fault (EF) protection basics
  • OC & EF protection principle of operation
  • Transformer Protection
  • Transformer faults and their causes, Magnetizing inrush current,
  • Transformer protection requirements
  • Feeder Unit Protection
  • Feeder unit protection basics, principle, types
  • Pilot Wire protection
  • Distance Protection
  • Distance protection basics, zones, characteristics,
  • Generator Protection
  • Generator Basics, Generators in Power Systems
  • Motor Protection
  • Motor Basics, Motor Types, Imposed External Conditions
  • Thermal Considerations, Contribution to Fault Level
  • Motor Protection Requirements,Differential protection
  • Busbar Protection
  • BB protection basics,protection requirements
  • Protection schemes, High impedance BB protection
  • Protection Settings
  • Protection Settings Basics, Setting Calculations Basics
  • Numerical Relays
  • Numerical relay concept characteristics
  • Relays for transmission system
  • For distribution system
  • Managing numerical relays
  • Relay Maintenance and Testing
  • Protective Relay Maintenance and Testing
  • Mechanical and Visual Inspections
  • Preventive Maintenance Testing
  • Acceptance Testing
  • Testing Techniques