Engineering and Maintenance
Medium Voltage and High Voltage Switchgear Operations and Maintenance

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Medium Voltage and High Voltage Switchgear Operations and Maintenance Course
Introduction:
Course 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
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 Outlines:
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
Sulphur HexaFlouride (SF6) and Vacuum Circuit Breakers
- Compression principles
- SF6 hazards and test equipment’s
- Dead and Live tank HV circuit breakers
- Operation mechanisms of HV circuit breakers
- Vacuum interrupters operation and maintenance
- Automated circuit breaker monitoring
Maintenance and Testing of Switchgears
- Manufacturer testing
- Installation and commissioning
- Documentation requirements
- Importance of maintenance & testing
- Maintenance strategies
- Infrared testing
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
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