Design of Economical Earthing Systems for Utility Electrical Installations | SAIEE Training Academy JHB



Design of Economical Earthing Systems for Utility Electrical Installations | SAIEE Training Academy JHB
The topic of Earthing is full of seeming contradictions, and best practices are often perceived as mysterious – more of an art than a science
Event Name: Design of Economical Earthing Systems for Utility Electrical Installations | SAIEE Training Academy JHB
Event Date: 17 October 2019
Starting Date: 17 Oct 08:00
Ending Date: 18 Oct 16:00
Event Type: CPD Course
Event Theme: Design of Economical Earthing Systems for Utility
Venue: SAIEE House, 18A Gill Street, Observatory, Johannesburg
Province: Gauteng
Cost: Please contact Roberto Benites for more info on this course
RSVP From: 27 May 2019
RSVP to: 16 October 2019
Event Contact: Roberto Benites
roberto@saiee.org.za
011-487-9042
To RSVP: Click here

Design of Economical Earthing Systems for Utility Electrical Installations | SAIEE Training Academy JHB

DESIGN OF ECONOMICAL EARTHING SYSTEMS FOR UTILITY ELECTRICAL INSTALLATIONS

SAIEE-1944-RV1: 2 CPD credits: Category 1

OVERVIEW

The topic of Earthing is full of seeming contradictions, and best practices are often perceived as mysterious – more of an art than a science. Earthing systems are critical for human and plant safety, but there is a tremendous scope for cost savings through design optimization whilst still meeting technical criteria. A life cycle cost minimization approach is detailed to release significant savings. Earthing systems must also be designed for various conditions, from lightning to power frequency faults, and an integrated approach for safety and electromagnetic compatibility is presented.

COURSE OUTLINE :

What you will learn

Introduction to earthing : Various functions of earthing

Major components of earthing systems and their role in overall performance

Conductor considerations

Corrosion and material compatibility

Conductor and connection coordination for optimum utilization / Reducing maintenance requirements

Factors affecting power and high frequency performance

Theft mitigation technique

Soil conditions

Role of soil in electrode performance

Determination of in-situ parameters

Alteration of soil properties through doping

Substation earthing design

Design inputs required for system modelling

Process for verification of safety limits from first principles

Earthing for personnel safety

Derivation of key human safety parameters

Factors affecting human susceptibility

Mitigation applied for operational staff

Techniques to minimize public exposure

Design optimization

Use of software to improve material utilization

Important principles for application for local reinforcement of earthing systems

Electromagnetic compatibility

Implications of interference causing malfunction of sensitive equipment

Coordination of equipment susceptibility with interface levels

Techniques for minimizing EMC problems through earthing and shielding

 

TARGET AUDIENCE

· Engineers and Technicians in Plant, Project and Design, Power systems, Instrumentation & Control, Maintenance and Consulting

  • Engineering Managers
  • Safety Professionals

· Field & Service Technicians and Electricians

COST :

Non-Member R7,500, SAIEE Member R5,500

(incl. teas, lunches and course material)

*Note: If proof of payment is received before commencement of the course, the following rates will apply:

Non-member R6,750 ; SAIEE member R4,950.

COURSE DATES:

25-26 June 2019: SAIEE HOUSE,JHB

Registration : 08:00 – 08:30

Workshop : 08:00 - 17:00

PRESENTER

GAVIN STRELEC received his BSc in Electrical Engineering at the University of the Witwatersrand in 1997. He has been a registered Professional Engineer since 2003, with 18 years of related experience in the Electricity Utility Industry with Eskom in South Africa. He is currently a Chief Engineer at ESKOM’s Research Test and Development and is Chairman of the NRS Industry workgroup to develop standards for deterring copper theft. He has recently obtained his MSc with distinction in Lightning Performance of HVDC Transmission lines.

He has been performing training seminars since August 2008 mainly on Substation Design and Earthing. He has presented in excess of 50 courses in various parts of South Africa, as well as the Democratic Republic of Congo, Ghana, Kenya and Uganda. His courses are always well received achieving high ratings from participating delegates. He uses many photographs and diagrams to communicate the principles and his presentation style is dynamic and engaging.

REGISTRATION : CONTACT DETAILS

ROBERTO BENITES

011 487 9042

roberto@saiee.org.za


Design of Economical Earthing Systems Program Outline for 2 days

 

1. Earthing

1.1 Multifunctional purpose of earthing systems

1.1.1 Human safety

1.1.2 Equipment protection

1.2 Basic principles of safety

1.2.1 Return path for current

1.2.2 Equipotential surfaces

1.3 Soil properties affecting earthing

1.3.1 Doping and imported soil

1.4 Materials and corrosion

1.4.1 Conductor and connection selection and coordination

1.4.2 Cathodic protection

1.5 Installation practices

1.5.1 Position and burial depth

1.5.2 Application of vertically driven electrodes

1.6 Theft mitigation

1.6.1 Alternative materials

1.6.2 Mitigation for existing installations

1.6.3 New design solutions

1.7 Human safety

1.7.1 Definitions and parameters that affect safety

1.7.2 Assumptions for designs

1.8 Deterministic vs. Probabilistic Approach

1.8.1 Designing for safety limits

1.8.2 Quantification of risk

1.9 Risk mitigation in difficult conditions

1.9.1 Poor soil (rocky and arid environments), built up areas

1.10 Design process

1.10.1 Soil survey and development of soil model

1.10.2 Protection and fault current implications

1.11 Safety verification from first principles

1.11.1 Determination of safety limits

1.11.2 Calculation of earthing system resistance

1.12 Design optimisation using software

1.12.1 Additional perimeter conductors

1.12.2 Additional mesh conductors

1.12.3 Earth-rods

 

2. Case Studies

2.1 Mitigation for high fault levels

2.2 Substations close to source

2.3 Super grids

3. Electromagnetic compatibility

3.1 Definitions and applicability

3.2 Standards

3.3 Sources, coupling and impact of interference

3.4 Low impedance earthing

3.5 Shielding and other mitigation

3.6 Best practices

 

i. Additional perimeter conductors


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