LV, MV, HV Switchgear Operation & Maintenance

Start Date End Date Venue Fees (US $)
17 May 2026 Madrid, Spain $ 4,950 Register
11 Oct 2026 Dubai, UAE $ 3,900 Register

LV, MV, HV Switchgear Operation & Maintenance

Introduction

This training course will present a comprehensive capsule of all the knowledge essential for the medium voltage and high voltage switchgear operations and walk the participants through the switchgear design process using a set of interlinked case studies. The training course focuses mainly on the operation and maintenance of distribution equipment namely transformers, circuit breakers, contactors, isolators, and disconnectors (this will also include the auxiliary peripherals and control circuits).

Medium and high voltages switchgear are the integral component of any electrical distribution system; hence, the selection and installation of these switchgears are vital so as to provide protection and safe distribution of electrical power. The equipment needs to be operated in a safe manner securing continuity of supply to consumers.

This training course will feature:

  • Understanding the types of medium voltage and high voltage switchgears
  • Operation principle of medium voltage circuit breakers
  • Identification of the various types of high voltage switchgears
  • Maintenance of testing of switchgears
  • Construction and operations of high voltage transformers

Objectives

    After participating in this course, you will be able to:

    • Understand the role and importance of switchgears
    • Determine the components and operations of medium voltage circuit breakers
    • Explain the different types of maintenance and testing for switchgears
    • Analyse the common faults and short circuit current
    • Design and components of high voltage transformers

Training Methodology

This is an interactive course. There will be open question and answer sessions, regular group exercises and activities, videos, case studies, and presentations on best practice. Participants will have the opportunity to share with the facilitator and other participants on what works well and not so well for them, as well as work on issues from their own organizations. The online course is conducted online using MS-Teams/ClickMeeting.

Who Should Attend?

This training course will benefit all levels of professionals in an electrical installation. It will enable them to understand the operations and maintenance of medium and high voltage circuit breakers and switchgears. This training course will greatly benefit:

  • Electricians
  • Electrical supervisors
  • Plant electricians
  • Operations & maintenance engineers, supervisors & technicians
  • Maintenance technicians

Course Outline

Day 1: The Role and Importance of the Switchgear in Power Systems

  • Circuit breakers, auto reclosers, disconnectors, and sectionalisers operations

  • Earth switches construction and applications

  • Switchgear symbols on single-line diagrams

  • Substation switchgear layouts

  • Types of the current situation

  • Fault clearing process 

Day 2: Sulphur HexaFlouride (SF6) and Vacuum Circuit Breakers

  • Compression principles

  • SF6 hazards and test equipments

  • Dead and Live tank HV circuit breakers

  • Operation mechanisms of HV circuit breakers

  • Vacuum interrupters operation and maintenance

  • Automated circuit breaker monitoring 

Day 3: Maintenance and Testing of Switchgears

  • Manufacturer testing

  • Installation and commissioning

  • Documentation requirements

  • Importance of maintenance & testing

  • Maintenance strategies

  • Infrared testing 

Day 4: Short Circuit Currents and Calculations and Working Safely

  • Introduction to types of relay

  • Relay selection, basic concepts and characteristics

  • Types of distress and protection modes

  • Introduction to safety in HV Substations

  • Switchgear numbering and nomenclature

  • Switchgear mechanical and electrical interlocking 

Day 5: HV Transformer

  • HV current transformers construction, operation and maintenance

  • HV potential transformers features and operation

  • Power transformer construction and operation

  • Buchholz relay, pressure relief device

  • Protective relay, conservator and breather operating principles

  • Maintenance of power transformers

Accreditation

Related Courses

2026 Training Calendar
Competency Solutions Brochure
PETC Corporate Profile