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 switchgear.
This training course is suitable for a wide range of technical professionals but will greatly benefit:
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 this switchgear 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 switchgear
Operation principle of medium voltage circuit breakers
Identification of the various types of high voltage switchgear
Maintenance of testing of switchgear
Construction and operations of high voltage transformers
Objectives
By the end of this training course, participants will be able to:
Understand the role and importance of switchgear
Determine the components and operations of medium voltage circuit breakers
Explain the different types of maintenance and testing for switchgear
Analyze the common faults and short circuit current
Design and components of high voltage transformers
Methodology
This training course will utilize a variety of proven adult training techniques to ensure maximum understanding, comprehension, and retention of the information presented. This includes presentation and discussion of the latest videos and technologies on medium and high voltage switchgear.
Questions are encouraged throughout, particularly at the daily wrap up sessions. This provides opportunities for participants to discuss with the Presenter specific issues and, if possible, find appropriate solutions. Specific goals of each participant will be discussed to ensure that their needs are fulfilled whenever practicable.
Course Outline
Day One: The Role and Importance of the Switchgear in Power Systems
Circuit breakers, auto reclosers, disconnectors, and sectionalizers operations
Earth switches construction and applications
Switchgear symbols on single-line diagrams
Substation switchgear layouts
Types of the current situation
Fault clearing process
Day Two: Sulphur HexaFlouride (SF6) and Vacuum Circuit Breakers
Compression principles
SF6 hazards and test equipment
Dead and Live tank HV circuit breakers
Operation mechanisms of HV circuit breakers
Vacuum interrupters operation and maintenance
Automated circuit breaker monitoring
Day Three: Maintenance and Testing of Switchgears
Manufacturer testing
Installation and commissioning
Documentation requirements
Importance of maintenance & testing
Maintenance strategies
Infrared testing
Day Four: 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 Five: 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
