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US-SP Earthing of Utility and Industrial Distribution Systems

  • Duration:
  • Investment: US$ 299
Certificate:

Must complete all lessons

Content

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Description

This course focuses on the building blocks of grounding of electrical systems. Unnecessary theory is reduced to allow you to focus on best practices over the duration of the course.

Few topics generate as much controversy and argument as that of grounding or earthing and the associated matters of lightning and surge protection of electrical and electronic systems. Any engineer or technician dealing with power supply networks needs to understand the basic principles of grounding system design and its role in ensuring safety of equipment and personnel. A correct understanding of the basic principles involved will help to avoid mistakes in grounding system design; mistakes that could lead to expensive failures and long downtime.

In this course, we aim to demystify the concepts of grounding as applicable to utility networks and industrial plant distribution systems as well as their associated control equipment. In fact, a lot of myths have been built around this subject, although it is quite a simple one when approached from basic principles. Our endeavour will therefore be to explain the fundamentals of grounding, which we hope will enable the participants to gain a correct perspective of the subject and give them the knowledge needed to solve real life grounding problems.

The course is value packed with multiple videos and example exercises.

WHO SHOULD COMPLETE THIS COURSE?

  • Building service designers
  • Consulting engineers
  • Data systems planners and managers
  • Electrical and instrumentation technicians
  • Electrical engineers   
  • Instrumentation and control engineers
  • Maintenance engineers
  • Power system protection and control engineers
  • Project engineers


YOU WILL LEARN:

  • The basic principles of grounding of electrical systems
  • The function of power system grounding and the various options available
  • Fundamental principles in the design of grounding systems in substations
  • How to solve static electricity-related hazards by grounding and bonding

 

VIEW THE INTRODUCTORY VIDEO HERE

 

Video 1: OVERVIEW:

  • Objectives of grounding and bonding
  • Fault in an underground system
  • Effect of neutral system grounding
  • Ground fault current flow
  • Ground electrodes
  • Grounding for charge/surge control
  • Dissipation of static charges
  • Lightning strikes
  • Sources of voltage surge
  • Typical ground loops

 

Video 2: STATIC ELECTRICITY AND PROTECTION:

  • What is static electricity and how is it generated?
  • Examples of static charge build up and its dangers
  • Energy of spark due to static electricity
  • Ways of controlling static build up
  • Risk assessment and preventive measures

 

Video 3: GROUNDING FOR LIGHTNING PROTECTION OF BUILDINGS AND STRUCTURES:

  • The physics of lightning
  • Lightning incidence in different land masses
  • Lightning strike probability
  • Lightning protection
  • Planning for protection and decision factors
  • Improved approach to lightning protection and non-conventional systems
  • Effect of lightning strikes on electrical installations

 

Video 4: POWER SUPPLY SYSTEM GROUNDING:

  • Types of system grounding
  • Ungrounded systems
  • Solidly grounded systems
  • Impedance grounding using neutral reactor
  • Resonant grounding using neutral reactor
  • Impedance grounding through neutral resistance
  • Classification of supply systems based on grounding
  • Point of grounding
  • Other challenges

 

Video 5: PROTECTIVE GROUNDING:

  • Electric shock, its cause and effects
  • Direct and indirect contact
  • Touch and step potential
  • Role of protective grounding in minimising the shock hazards
  • Equipotential bonding
  • Protective grounding conductors and installation
  • Ground fault protection
  • System classification based on system/protective grounding

 

Video 6: SURGES AND SURGE PROTECTION:

  • Surges, their causes and mitigation
  • The ways by which surges couple into electrical circuits
  • Bonding of grounding systems
  • Basic principle of surge protection and commonly used surge protection devices
  • Graded surge protection
  • Selecting appropriate surge protective devices and their positioning in a system

 

Video 7: GROUND ELECTRODE SYSTEMS:

  • Soil resistance and factors affecting soil resistivity
  • Measurement of soil resistivity
  • Resistance of ground electrode and distribution of resistance in surrounding soil layers
  • Electrode current capacity
  • Ground electrode configurations
  • Parallel electrodes
  • Ground electrode resistance measurement
  • Chemical electrodes
  • Concrete encased electrodes and splicing methods
  • Corrosion of buried electrodes
  • Grounding system maintenance

 

Video 8: ELECTRICAL NOISE AND MITIGATION:

  • Definition of electrical noise
  • How are sensitive circuits affected?
  • Noise categories
  • Noise from power electrical equipment
  • Noise coupling into signal circuits
  • Noise mitigation measures
  • Role of proper grounding in reducing noise
  • Noise control by proper grounding of UPS derived supplies

 

Video 9: SUBSTATION GROUNDING DESIGN:

  • Grounding practices
  • Basic design approach
  • Calculating the ground fault current
  • Ground potential rise in HV systems
  • Grounding design in LV and MV substations/installations
  • Grounding grid design for HV/EHV substations - a step-by-step approach
  • Introduction to two-layer soil model
  • Transferred potential and ways of avoiding
  • Points needing special attention in substation grounding design and for GIS equipment
  • Design of substations containing converter equipment feeding to HVDC transmission systems
  • Ensuring effective substation grounding - important aspects

 

PRACTICAL: DYI LAB EXPERIMENTS

  • Links to Basic Software Simulations
  • A range of exercises with a quiz and problems with answers

 

Investment

Plan Name Investment
Unlimited Access for 2 Years: US$ 299

Instructor

Roger Royal

Senior Instructor, IDC Technologies

 

Roger has built up a solid 40 years of hard won experience in the electrical power industry and this is apparent in his instructing. He has a passion for teaching and has achieved outstanding results over the past ten years with his courses on circuit breakers and switchgear, earthing, bonding, lightning, surge protection, power systems protection and transformers throughout the world. Roger will ensure you walk away with skills you can immediately apply to your work. He commenced his career in the design and construction of transformers, power cables and switchgear with Alstom (GEC); this work included a significant degree of R&D. Roger has since worked for numerous blue chip companies in the classical design of power systems, transformers and switchgear. More recently, he has spent considerable time in maintenance operations of electrical engineering assets.

 

Courses by this presenter

Requirements

Others:

Some working knowledge of basic electrical equipment is required, although this will briefly be covered at the beginning of the course. Real-life experience with such equipment and hands-on testing will enable the course to be placed in context.
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