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Electrical Power System Protection

  • Schedule : Online
  • Who is this for: Electrical Engineering Students , Workers

Duration: 5-8 Hours
Schedule: Online
Level: Beginner
Rs: 64,000

Course Overview

Objectives

  • To understand the fundamentals of electrical power protection and applications
  •  How to recognize the different fault types
  • The importance to reduce equipment damage and the danger to operating personnel.
  • To teach you how to interpret the protection systems existing in your plant, understand their functions, detect any shortcomings, and explain any undesired or uncoordinated relay operation. 

 

 

  • Power system overview
  • Basics of Power System Protection
  • Types of Faults and Short Circuit Current Calculations
  • System Earthing and Earth Fault Current
  • Fuses and Circuit Breakers With Builtin Protection
  • Instrument Transformers Transformer Ratio and Errors of Ratio and Phase Angle
  • Relays and Auxiliary Power Equipment
  • Protection Grading and Relay Coordination
  • Unit Protection and Applications
  • Protection of Feeders and Lines
  • Protection of Transformers
  • Protection of Transformers

 

 

  • Electrical distribution system

  • Reading single line diagrams

  • LV, MV AND HV equipment

  • Function and types of electrical switchgear

  • Basic circuit breaker design

  • Need for protective apparatus

  • Basic requirements and components

  • The development of simple distribution systems

  • Faults-types, effects, and calculations

  • Equivalent diagrams for reduction of system impedance

  • Calculation of short circuit MVA

  • Unbalanced faults and earth faults

  • Symmetrical components

  • Phase and earth faults

  • Comparison of earthing methods

  • Protective earthing

  • Effect of electric shock on human beings

  • Sensitive earth leakage protection

  • System classification

  • Fuse operating characteristics, ratings and selection

  • Energy ‘let through’

  • General rules of thumb

  • IS-limiter

  • Circuit breakers – types, purpose and arc quenching

  • Behavior under fault conditions

  • Protective relay-circuit breaker combination

  • Circuit breakers with in-built protection

  • Conventional and electronic releases

  • ‘Class’ of instrument transformers

  • Voltage and current transformers

  • Applications

  • Principle of construction and operation of protective relays

  • Special focus on IDMTL relays

  • Factors influencing the choice of plug setting

  • The new era in protection – microprocessor, static and traditional

  • Universal microprocessor overcurrent relay

  • Technical features of a modern microprocessor relay

  • Future of protection for distribution systems

  • The era of the IED

  • Substation automation

  • Communication capability

  • Need for reliable auxiliary power for protection systems

  • Batteries and battery chargers

  • Trip circuit supervision

  • Why breakers and contactors fail to trip

  • Capacity storage trip units

  • Protection design parameters on MV and LV networks

  • Coordination – the basis of selectivity

  • Current, time and earth fault grading

  • Time-current grading

  • Grading through IDMT protection relay

  • Coordination between secondary and primary circuits of transformers

  • Current transformers – coordination

  • Importance of settings and coordination curves

  • Protective relay systems

  • Main, unit and back-up protection

  • Methods of obtaining selectivity

  • Differential protection

  • Machine, transformer and switchgear differential protection

  • Feeder pilot-wire protection

  • Time taken to clear faults

  • Unit protection systems – recommendations and advantages

  • Over-current and earth fault protection

  • Application of DMT/IDMT protection for radial feeders

  • Directional overcurrent relays in line protection

  • DMT and IDMT schemes applied to large systems

  • Unit and impedance protection of lines

  • Use of carrier signals in line protections

  • Transient faults and use of auto reclosing as a means of reducing outage time

  • Auto-reclosing in circuits with customer-owned generation

  • Auto-reclosing relays for transmission and distribution lines

  • Winding polarity

  • Transformer connections and magnetizing characteristics

  • In-rush current

  • Neutral earthing

  • On-load tap changers

  • Mismatch of current transformers

  • Types of faults

  • Differential protection

  • Restricted earth fault

  • HV overcurrent

  • Protection by gas sensing and pressure detection

  • Overloading

  • Motor protection basics

  • Transient and steady-state temperature rise

  • Thermal time constant

  • Motor current during start and stall conditions

  • Stalling of motors

  • Unbalanced supply voltages and rotor failures

  • Electrical faults in stator windings earth fault phase-phase faults

  • Typical protective settings for motors

  • An introduction to generator protection