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EEA QUT 221 Basic Power System Protection: COURSE CONFIRMED

17 September 2018 - 19 September 2018
8:30 am - 4:30 pm
The Terrace Conference Centre
114 The Terrace


Power system protection is the ‘invisible’ side of the process of generating, transmitting and distributing electrical power. Protection relays, in the words of the Westinghouse Corporation, are the ‘silent sentinels’ of the power system, being called upon to operate only when something goes wrong on that power system. The most common event seen by protection equipment involves failure of insulation, but other types of events e.g. mechanical failure, thermal overload or overvoltage, can also cause the operation of protection systems.

Protection equipment then initiates remedial action, quickly isolating that part of the system where the problem lies, and thereby moving the system and its components back inside the permissible ‘technical envelope’. As a result of this action, plant damage, risk to the public and power utility personnel, and the economic impact on both the utility and the consumer, are minimized.

This unit aims to give you a sound appreciation of protection philosophy, protection relay characteristics, relay setting principles, protection system design and current transformer specification.

Download course flyer here.


On completion of this course, participants will be able to:

  • Explain why protection is needed on a power system and appreciate the fundamental principles of power System protection
  • Apply the techniques commonly employed by protection designers to achieve an acceptable level of protection reliability and security
  • Specify current transformers for specific applications
  • Select and set basic systems of overcurrent relays, differential relays and distance relays
  • Explain the pros and cons of fuses, reclosers and sectionalizers
  • Set a distance relay to protect a feeder and to provide remote backup protection


  • Protection system reliability and security
  • Methods of grading protection relays
  • Comparison of ‘unit’ and ‘non-unit’ protection
  • Different causes and characteristics of the faults that occur on power systems and the specific protection relays that are used to detect them
  • Examination of local back-up protection
  • The per-unit system and basic fault calculations
  • Various types of relays—electro-mechanical and electronic
  • Current and voltage transformers—theory and specification for different applications
  • Bus Protection
  • Transformer protection—basic overview of the different types, with emphasis on application and setting of differential protection
  • Theory, application of and setting procedures of overcurrent and earth fault protection, including inverse time relays, instantaneous overcurrent relays and directional overcurrent and earth fault relays
  • Reclosers, sectionalisers and fuses – basic application and co-ordination
  • Distance relays – theory, application and and setting procedures
  • Analysis of protection events
  • Commissioning and maintenance of protection systems

Course Venue and Timings

The Terrace Conference Centre, 114 The Terrace, Wellington

  • Monday 17th September 2018 - 8.30am (Registration) course starts 9.00am to 4.30pm
  • Tuesday 18th September 2018 - 9.00am to 4.30pm
  • Wednesday 19th September 2018 - 8.30am to 12 o'clock

Course Costs and Confirmation:

this course is confirmed

The cost for EEA Members and staff of Corporate Members is $2150.00+gst and Non-Members is $2450.00+gst. This course is subject to a minimum number of attendees and will only be confirmed once these numbers are reached.

Register for this Course

To register, follow the link at the bottom of this page. If you have any trouble registering, or any questions, please contact us on 04 4738600 or email to

Note: An invoice will not be sent at the time of registration just your confirmation email of attendance. The invoice will be sent once the minimum number has been reached. Please hold any travel arrangements until we have confirmed the course.

Member's rate
Non-Member's rate
All prices exclude GST and are represented in New Zealand Dollars
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