Course Objectives

• Know the basic electrical system protection techniques including fault analysis
• Understand 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 over voltages

Course Outlines:

• Power System Faults
  • Different types of faults
  • Incidence of faults on power system equipment
  • Effects of power system faults
  • Magnitude of fault current, short circuit calculations
  • Detection of faults
  • Clearance of faults
  • Requirements of protective relaying systems

• Short Circuit Theory and fault studies
• Effects of short circuit
  •  Fault current sources
  • Fault current characteristics
  • Equipment ratings
  • Fault calculations

• Components of Power System Protection Schemes
  •  Fault detecting relays
  • Tripping relays and other auxiliary relays
  • Circuit breakers - bulk oil, air-blast, vacuum, SF6
  • Current Transformers
  • Voltage Transformers
  • Ground Transformers
  • The transition from electro-mechanical relays to electronic and digital microprocessor-based relays
  • The application of programmable logic controllers
  • Modern microprocessor-based relays: review of types available

• Current Transformers (CTs) & Voltage Transformers (VTs)
  • Various types of CTs, VTs & CVTs
  • Theory and characteristics of CTs
  • Application requirements of CTs for protective relaying
  • Accuracy classifications
  • Future trends in CT design
  • Testing of CTs and VTs

• Co-ordination of Electrical Protection Systems
  • Fuse to fuse
  • Circuit breaker to fuse
  • Fuse to circuit breaker
  • Back up protection
  • Limitation of fault current
  • Selective zones of protection
  • Types of bus protection schemes
  • Basic concept of differential protection
  • Application to various bus configurations
  • Applications to switchboards
  • Testing of bus protection schemes

• Feeder Overcurrent Protection
  • Protective relaying requirements for loop and radial systems
  • Elements of feeder protection schemes
  • High set, low set, and inverse -timed elements
  • Co-ordination with other devices and fuses
  • Auto-reclosing of feeder circuit breakers
  • Various types of overcurrent relays
  • Electromechanical, electronic & digital relays
  • Relay setting criteria
  • Testing of overcurrent protection schemes

• Transformer Protection
  •  Overcurrent and ground-fault protection
  • Application of differential protection to transformers
  • Gas relays, pressure and gas accumulation
  • Winding temperature and oil temperature devices
  • Testing of transformer protection schemes
  • Modern microprocessor-based multi-function relays-available functions, application and testing

Who Can Benefit?

• Electric power Engineers
• Supervisors and qualified technicians can get considerable upgrading education. The course is also beneficial for other engineers such as mechanical
•  Communication Engineers.