Course Overview

  • 5.5 Hours

  • All Levels

  • All Devices

  • 12 Months Access

  • Certificate

Watch Intro Video

What will you learn in this course?


Here we deal with the protection & control principles of high voltage stations. HV Bus Differential Protection is studied along with restrictions due to CT saturation & mis-match and its solution, “Restraint Differential Protection”.

Starting with System Faults and how they affect  Switchyard Configuration & Elements, simple “Differential Protection” is examined along with the mal-operation due to CT saturation and mis-match.

High Voltage Circuit Breakers are examined as to the various Types (Oil, Vacuum, Air Blast, SF6), their Controls (Closing/Tripping/anti-pumping) Reclosure Syncrocheck relay CUH 90 – VG, as well as Breakers Failure Protection, is part of this module along with a quick look at Dynamic Monitoring Equipment. We also look at transfer & remote tripping and the need to provide immunity from ground rise potential and open circuit situations.


What you will learn:

  • System Faults
  • Switchyard Configuration & Elements
  • The DESN Station (Duel Element Spot Network)
  • HV Bus Differential Protection
  • CT Saturation & Mal-operation of Bus Protection
  • CT Saturation & Restraint Differential Protection
  • Westinghouse KD - 4 Relay
  • Surge Protective Devices
  • Fuses; DC Protection
  • Logic Differential Protection
  • The Modern IED Relays (Intelligent Electronic Device)
  • Overview HV Circuit Breaker Types (Oil, Vacuum, Air Blast, SF6)
  • HV Circuit Breaker Controls (Closing & Tripping)
  • HV Circuit Breakers; 
  • Reclosing (Syncrocheck CUH 90 – VG Relay)
  • Dynamic Monitoring Equipment (DME)
  • Impedance Relaying (POTT)


Register to access free preview lessons.

  • 1
    • Introduction FREE PREVIEW
    • Overview of Stations
    • Relaying in General
    • Instrument Transformers
    • Transformer Configurations Connections Cooling
    • Surge Protective Equipment
    • High Voltage Circuit Breakers
    • Breaker Control & Auto Reclosing
    • Instantaneous & Timed Over Current Protection
    • Differential Protection
    • Impedance Relaying