This course is accredited by ECSA with 2 CPD points.
Accreditation No.: ICMEESA331-24

Venue: Hybrid - ONLINE & Birchwood Hotel & OR Tambo Conference Centre

44 View Point Rd, Bartlett, Boksburg

SYNOPSIS

Today, the demand for technical skills and expertise in Medium Voltage/Low Voltage (MV/LV) electrical reticulation is increasing. It is the responsibility of companies, industries and municipalities to improve and educate their workforce to flow with the technological trend in MV/LV reticulation.

This MV/LV Reticulation Workshop is designed to provide a comprehensive understanding of Medium Voltage (MV) and Low Voltage (LV) electrical reticulation systems. Over two days, participants will acquire practical skills in planning, designing, installing, and maintaining electrical networks through a series of structured modules.

Day 1 Overview

• Module 1: Explores the life cycle of electrical networks and various power supply configurations.
• Module 2: Covers electricity network planning, design procedures, maximum demand estimation, and preparing design specifications.
• Module 3: Focuses on causes and impacts of short circuits, along with fault analysis and switchgear selection.

Day 2 Overview

• Module 4: Discusses protection device performance and protection schemes for feeders and transformers.
• Module 5: Highlights the significance and objectives of earthing systems.
• Module 6: Examines components, design considerations, and construction processes for overhead lines.
• Module 7: Focuses on specifications, cable types, and installation methods for underground systems.
• Module 8: Covers power distribution, load assessment, and protective devices in buildings.
• Module 9: Reviews installation procedures, compliance certification, and testing for safety and reliability.

Active participation will be encouraged to enhance the learning experience as we deepen our understanding of MV/LV reticulation and advance our skills in electrical engineering.

Workshop outline

Day 1 module 1 :INTRODUCTION TO MV/LV RETICULATION

• Introduction
• Life cycle of an electrical network
• POWER SUPPLY CHARACTERISTICS OF MEDIUM VOLTAGE NETWORK
  • MV radial network: Single-line service
  • MV loop: Ring-main service
  • Two parallel MV cables: Parallel feeders service
• LV NETWORK CONFIGURATION
• Electrical reticulation networks
•  LOW-COST RETICULATION SYSTEMS
  • Single phase, 2-wire feeders with light (small) conductors, SWS –Shield Wire Systems, CCS –Capacitor Coupled Substation

Day 1 module 2 : Electrical Reticulation Planning, Design & Upgrade

• Electricity network planning
• Planning procedure of electricity supply system
• Planning and designing of electricity supply system
• Design and Construction of network assets
• Stages of design
• Maximum demand estimation
• After Diversity Maximum Demand (ADMD) estimation and Load forecasting
• Internal Network design of distribution networks
• Preparing Specifications for Electrical Design
• When given a site map of a proposed industrial park for electrical design, what do you do and how do you start
• Design tools
• Upgrade of Existing system (MV & LV)

Day 1 Module 3:  Fault, Fault Levels Calculation And Switchgear

• Faults in power system
• What causes short circuit
• What are physical damages from faults
• Why do we perform fault analysis and how?
• Per unit calculation
• Fault level calculation
• Selection of switchgear and cables based on fault levels

Day 2 module 4 : MV/LV Reticulation Protection Scheme Philosophy And Selection

• Introduction
• Short circuit performance of protection devices
• Feeders Protection Schemes;
• Transformers Protection Schemes;
• Course activities

Day 2 module 5:  MV/LV Reticulation Earthing

• Introduction to earthing;
•  Objectives of earthing;
• Functions of earthing systems
• Families of earthing arrangements: TN−S, TN-C, TN-C-S, TT and IT System Earthing
• Different Methods of Power System Earthing;
• Earthing of Equipment installations
• Transformer MV/LV earthing;
• Portable earthing equipment
• Substation earthing
•  Material for earthing application

Day 2 Module 6: Design And Construction Of Overhead Reticulation System

• Introduction
• Key Components overhead line
• What are we designing for?
• What physical loadings do we have to allow for our design?
• What physical conditions do we have to allow for in our design?
• How do we allow for all these variable factors in our design?
• Approach to Designing and constructing an overhead reticulation system
• Preliminary Design Considerations
• Route Selection
• Pole and Conductor Design
• Structure selection guide
• Selection of MV & LV conductor sizes
• INSULATORS
• Protection and Switching
• Construction Process
• Service Connections
• Metering

Day 2 Module 7: Design And Construction Of Underground Reticulation System

• General Specification for Underground Electrical Reticulation;
• Cable types and cable selection;
  • Size and type of load to be supplied
  • Permissible voltage drop
  • Short circuit ratings of cables
  • Environmental Conditions of Installation
  • Worked examples of cables selection
• Cable installation methods

Day 2 Module 8: Power Reticulation Within a Building

• Introduction to power distribution in buildings
• Load assessment and maximum demand
• General power reticulation within building
• Distribution system configuration
• The vertical supply system (rising mains);
• The horizontal supply (distribution at each floor level).
• Incoming supply
• Main switchgear;
• Emergency Generator and UPS
• Final circuit switchgear
• Circuit protective devices
• Course activities

Day 2 Module 9: Installation Commissioning, Testing And Handover

• Introduction
• Certificate of Compliance for electrical installation
• Registered person
• Inspection and tests
  • LV & MV Inspection and test: Testing of the fixed electrical installation, transformers, switchgear, cables, batteries etc
• Documentation

Assessment