Course Objectives

To gain a detailed understanding of HV Protection.

Course Description

This course is designed to increase the trouble shooting skills and fault diagnostic processes of engineers and maintenance teams on HV Generation and Distribution systems. The practical elements of the course centre on advancing the candidate’s knowledge of protection systems. The course will progressively move toward advancing the candidate’s knowledge of the faults and their rectification on a ranging of electrical systems.

Who Should Attend

Electrical Engineers and Technicians who have the responsibility for maintaining local electrical operating networks. Engineers who need to trouble shoot and understand protection systems on many different systems and need to advance their knowledge and skills of these systems.

Pre-Requisites

All Attendees should have a sound power generation and electrical background.

Course Outcome

At the end of this course you will be able to troubleshoot high voltage systems.

Course Outline

Day 1

• Introduction
• Revision of Fundamentals of Electricity
  • Description of course aims, assessment of existing knowledge, fundamentals of protection
• Instrument/Protection Transformers
  • Current and voltage transformers - theory tutorial and practical exercise involving magnetisation curve.

Day 2

• Feeder Protection
  • Principles and application of IDMTL O/C, DO/C, and unit protection to distribution feeder circuits and ring main systems
• Fault Energy
  • Basic theory covering sources, MVA impedances simple calculations

Day 3

• Time Graded Overcurrent Protection
  • Current/time settings, calculations
• Injection Testing
  • Principles, application and practical exercise involving secondary injection
• Testing of Relays
  • Practical exercises involving testing of various types of relays, Available eg :-
    • Bus Zone Protection
    • Earth Fault Relays
    • Bus zone Supervision
    • Overcurrent

Day 4

• Electrical Pressure Testing
  • To cover the theoretical and practical aspects of electrically testing the insulation of power cables, switchgear, transformers motors etc.
    • Safety Requirement
    • Insulation Resistance
    • Polarisation Index
    • Flash Testing
    • AC Pressure Tests
    • DC Pressure Tests
    • Practical Testing Exercises

Day 5

• Transformer Protection
  • Theory and application of overcurrent, balanced restricted and standby fault protection, Bucholz relays.
     

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