Introduction to High Voltage Electrical Installations


1-day course

CPD Credit: 7 hours, C1

Course Overview

This course aims to provide participants with an understanding of HV Systems, the main components, terminology, single line diagrams, operation and maintenance and risks and hazards.

Learning objectives

To understand:

  • How components are connected together
  • The function of the components of a typical HV system
  • Principles of operation
  • Hazards and Risks associated with HV installations
  • Purpose of control, metering and protections systems
  • Importance of documentation
  • Best practice for procurement & take-over of HV installations
  • Safety documents associated with safe systems of work
  • Importance of maintenance, inspections & audits
  • Planning HV work
  • Importance of HV Rules

Course outline

The course is set out in 9 modules as follows:

  1. HV System – Layout and Boundaries
  2. HV Equipment & Parts of the System
  3. Grid Transformer – Components and Protection
  4. Single Line Diagram – Information & Importance
  5. Work on the HV System and using the SLD
  6. High Voltage Maintenance
  7. Technical Due Diligence for take over and procurement
  8. Certification of HV Installations
  9. Management of HV Systems

Who Should Attend?

Asset Owners / Managers and others involved in O&M of HV installations and Engineers, Technicians, Safety professionals and other graduates who wish to develop an understanding of HV installations.

Trainer Profiles

Padraig Plunkett is a Chartered Electrical Engineer with 35 years varied international experience in HV Power Systems and Transformers. Padraig is a member of various technical and safety committees including:

  • NSAI/ETC/TC 03: S.R. 61936/ISEN 61936 Power installations exceeding 1kV (1.5kVdc) & ISEN 50110 Operation of electrical installations
  • IEC TC99/MT4: IEC 61936 Power installations exceeding 1kV (1.5kV dc)
  • CENELEC CLC / BTTF 62-3 BTTF 62-3 EN 50110 Operation of electrical installations

Mick O’Grady has 35 years’ experience in ESB having worked in a number of areas across the business including HV Maintenance & Installation, operation of HV systems up to and including 220kV, Protection Specialist, 10/20kV Network Manager/Controller, Safety Services Manager and H&S Manager for Major Generation Projects. Mick is a time served Electrician and holds a H.Dip in the Management of Safety, Health and Welfare at Work and is presently working as a coach in ESB focusing on culture transformation.


  • Siobhan Wall, Waterford IT: “Very comprehensive, delivered by individuals with a lot of experience”

Sustainability Badge

Engineers Ireland supports the Sustainable Development Goals. This event contributes to Engineers Ireland's Sustainability Framework.

Please contact the Team for further information on scheduled course dates and In-Company options. You can reach us by phone: 01 665 1305 or email