An intensive professional development training course on

LV, MV, HV Switchgear
Operation & Maintenance

We currently have no scheduled sessions for this course. If you are interested in running this course, please contact our Training Department at

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Why Choose this Training Course?

The course focuses mainly on the construction, operation, maintenance and testing of switchgears, with reference to auxiliary protective relays and equipment necessary for its operation. Industrial electrical installations usually comprises of low voltage, medium voltage and high voltage equipment and switchgears.

These differences in voltage ratings has many safety aspects and understanding of its operations and maintenance to be considered very carefully.To ensure safety of operators and maintenance personnel, proper switching procedures are necessary and more so when the circuits have multiple feeds and are complex. Switchgear operation and maintenance plays an important role in the safe distribution of electrical power.

This course will feature:

  • Types of LV, MV and HV switchgears
  • Principles of operation & components of SF6 & vacuum circuit breakers
  • The various types switching devices
  • Construction and operations of relays
  • Maintenance of switchgears & condition monitoring


What are the Goals?

By the end of this course, participants will be able to:

  • Understand the role and importance of LV, MV and HV switchgears
  • Determine the components and operations gas and vacuum circuit breakers
  • Understand the operation and selection of relays and switchgear interlocking
  • Explain the different types of maintenance and testing for switchgears
  • Analyse results from condition based maintenance


Who is this Course for?

This course will benefit all levels of personnel in an electrical installation. It will enable them to understand operations and maintenance of LV, MV and HV circuit breakers, switchgears, relays and maintenance strategies

This course is suitable to a wide range of professionals but will greatly benefit:

  • Electricians
  • Electrical Supervisors
  • Plant Electricians
  • Operations & Maintenance Engineers & Supervisors
  • Maintenance Professionals


How will this be Presented?

This course will utilise a variety of proven adult training techniques to ensure maximum understanding, comprehension and retention of the information presented. This includes presentation and discussion of latest videos and technologies on LV, MV and HV circuit breakers and switchgears.

Questions are encouraged throughout the day and at the daily wrap-up sessions. This provides opportunities for participants to discuss with the presenter and other delegates specific problems and appropriate solutions.


The Course Content

Day One
Types of protection system in an electrical installation
  • Types of low voltage protection and control equipment
  • Circuit breakers operation and construction
  • Fuses and classifications for protective devices
  • Discrimination and protective devices rating selection
  • Types of current situation and fault clearing process
  • Preference of fuses over circuit breakers
Day Two
Air, Sulphur HexaFlouride (SF6) and vacuum circuit breakers
  • Types of medium voltage circuit breaker
  • Air circuit breaker construction and operation
  • Sulphur HexaFlouride (SF6) circuit breaker construction and operation
  • Vacuum circuit breaker construction and operation
  • MV circuit breaker solid state tripping systems
  • SF6 hazards and test instruments
Day Three
HV circuit breakers, current and potential transformers
  • Types of high voltage switchgears
  • Live tank and dead tank circuit breakers
  • Operation and switching mechanisms of HV circuit breakers
  • HV current transformer construction operation and maintenance
  • HV potential transformer features and operations
  • Auto reclosers, load switches, disconnectors and sectionalisers
Day Four
Types of relay for protection and safety
  • Types of protective relays and functions
  • Protection characteristics and applications
  • Switchgear interlocking
  • Solid state protection relays for MV & HV installation
  • Safety in MV and HV substations
  • Types of MV and HV switchboards
Day Five
Maintenance and testing of switchgears
  • Importance of maintenance and testing
  • Types of maintenance including conditioned base maintenance
  • Installation and commissioning and post commissioning maintenance
  • Documentation requirements
  • Manufacturer  testing, factory and site acceptance tests
  • Failure reporting and analysis of partial discharge and infrared tests

The Certificate

  • AZTech Certificate of Completion for delegates who attend and complete the course.


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