Protection and Relay Setting for Electrical Power System Elements Course

Course Overview:

The course focuses on a comprehensive understanding of electrical equipment protection, performing fault analysis, use of protective devices and their maintenance strategies.

Participants will be introduced to system protection philosophy and principles, various types of faults as well as the principles behind protective relays such as differential, overcurrent, and distance relays. 

Other topics are also included such as distribution system protection, busbar protection and the application of current and voltage transformers. 

This course is aimed at engineers and technicians working in the power system protection environment and therefore caters them with practical abilities to improve system reliability, rectify problems and implement protection schemes available in the industry efficiently.

Course Objectives:

By the end of the training, participants will be able to:

• Enhance your Knowledge of Basic Electrical System Protection Techniques including Fault Analysis
• Techniques, Further your understanding of Protective Devices
• Understand Problems Generally faced and solutions successfully adopted by Industry
• Learn to calculate the basic Fault Currents flowing in any part of the Electrical System
• Improve your Electrical System Protection against Faults and Overvoltage
• Understanding  Digital  differential  protections  and  their  application  for  Busbar,  Generator,
• Transformer and Transmission Lines
• Explain the Principles of Operation of Instantaneous and Time Delay Electromagnetic Relays for
• Differential Protective Relays, Ground Protective Relays, Over and Under Voltage Relays, Over Current Protective Relays and Distance Relays
• Learn all types of Maintenance Jobs performed on Relays

Who Should Attend?

This course is intended for Electrical Engineers and Highly Qualified Technicians, Protection Engineers, Operation Engineers, those concerning Protection Fields such as Protection of Electrical Power System.

Course Outlines:

Introduction to Protection

• Philosophy of System Protection
• Role of Protection & Protective Relays
• Abnormalities & Faults
• Protection Terminology
• Protection Devises Numbers

Power System Faults

• Different Types of Faults
• Incidence of Faults on Power System Equipment
• Effects of Power System Faults
• The magnitude of Fault Current, Short Circuit
• Detection / Clearance of Faults

Protection Equipment

• Fuses & Isolators
• Load Breakers
• Circuit Breakers
• Auto Reclosers
• Automatic Sectionalizer

Measuring Transformers (VT/CT)

• Current Transformer
• Open Circuited Current Transformer
• Short Time Factor
• Accuracy Limit Factor
• Specification of Current Transformer
• Secondary Rating, Winding Impedance
• Current Transformer Testing: Polarity/Ratio
• Potential Measuring Devices
• Residual Connection
• Capacitor Voltage Transformer
• Ratio Check Testing
• Polarity Check Testing
• Magnetizing Curve

Differential Protection

• Application of Differential Protection
• Principles of Circulating Current Differential
• Difficulties in Differential Protection
• Biased or Percent Differential Relays
• The setting of Differential Relays
• Balanced Voltage Differential Protection

Distribution System Protection

• Discrimination and Coordination
• Selective Tripping Plan, Selective Tripping Time
• Selective Tripping Times on the Low- Voltage Side
• Selective Tripping Times on the High - Voltage Side
• Protective Devices for Low Voltage Side
• Protective Devices for High Voltage Side

Over Current Protection

• Non-Directional Time Graded System of Feeder (Line)
• The setting of Inverse Over-current Relays for Co-ordination
• Directional Time and Current Graded System
• The setting of Directional Overcurrent Relays
• Current Graded System
• Instantaneous and IDMT Protection
• Over—Reach of Instantaneous Over Current
• Definite Time overcurrent Protection of Lines

Distance Protection

• Distance Protection of H.V and E.H.V
• Stepped Characteristic
• Single Stepped Distance, Time Characteristic
• Three-Step Distance - Time Characteristic
• Power Swings
• Carrier Assisted Distance Protection
• Carrier Transfer
• Carrier Blocking Scheme (Directional Comparison)
• Carrier Acceleration
• Distance Schemes for Single, Triple Pole Auto Reclosing
• Connection of Distance Relays
• Protection of Parallel Transmission Lines

Bus Bar Protection

• Importance of Busbars
• Differential Protection of Buses
• Auto reclosure
• Interlock Overcurrent Protection
• Busbar Switching (Transfer) Arrangements
• Course Conclusion