Guide to Basic Industrial Power-System Protection--Intro; Index (TOC)

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Intro ...

Circuit BreakerThis guide has been designed to give plant operators, electricians, field technicians and engineers a better appreciation of the role played by power system protection systems. An understanding of power systems along with correct management, will increase your plant efficiency and performance as well as increasing safety for all concerned. This guide is designed to provide an excellent understanding on both theoretical and practical level. We start at a basic level, to ensure that you have a solid grounding in the fundamental concepts and also to refresh the more experienced readers in the essentials. We then moves onto more detailed applications. It’s most definitely not an advanced treatment of the topic and it’s hoped the expert will forgive the simplifications that have been made to the material in order to get the concepts across in a practical useful manner.

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This guide features an introduction covering the need for protection, fault types and their effects, simple calculations of short circuit currents and system grounding. The guide also refers to some practical work such as simple fault calculations, relay settings and the checking of a current transformer magnetization curve which are performed in the associated training workshop. You should be able to do these exercises and tasks yourself without too much difficulty based on the material covered in the guide.

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This is an intermediate level guide -- at the end of the guide you will have decent knowledge of the principles of protection. You will also have a better understanding of the possible problems likely to arise and know where to look for answers.

Industrial Control Transformer--Type T and TF industrial contol transformers are designed with low-impedance windings for  voltage regulation.In addition you are introduced to the most interesting and 'fun' part of electrical engineering to make your job more rewarding. Even those who claim to be protection experts have admitted to improving their knowledge after attending this guide but at worst case perhaps this guide will perhaps be an easy refresher on the topic which hopefully you will pass onto your less experienced colleagues.

We would hope that you will gain the following from this guide:

  1. The fundamentals of electrical power protection and applications
  2. Knowledge of the different fault types
  3. The ability to perform simple fault and design calculations
  4. Practical knowledge of protection system components
  5. Knowledge of how to perform simple relay settings
  6. Increased job satisfaction through informed decision making
  7. Know how to improve the safety of your site

Typical learners who will find this guide useful may include:

  1. Electrical Engineers
  2. Project Engineers
  3. Design Engineers
  4. Instrumentation Engineers
  5. Electrical Technicians
  6. Field Technicians
  7. Electricians
  8. Plant Operators

You should have a some of industrial-electrical knowledge and electrical-protection systems to get maximum benefit from this guide. This guide was put together by several notable contributors and experts.

Index of Articles (aka Table of Contents)

Do We Need to Protect?

Faults, types and effects

Simple calculation of short-circuit currents [coming soon]

  • Introduction
  • Revision of basic formulae
  • Calculation of short-circuit MVA
  • Useful formulae
  • Cable information
  • Copper conductors

Grounding Industrial Electrical Power Systems


Instrument transformers

Circuit breakers

Tripping-current substation batteries


Coordination via time grading

Low-voltage networks

Mine underground distribution protection

Fundamentals and Principles of unit protection

Feeder protection cable feeders and overhead lines

Transformer protection

Switchgear (busbar) protection

Motor protection relays

Generator protection

Protection Management

The Industry / Companies


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Thursday, January 31, 2013 15:32