Start Date : 17 Aug ,2025
End Date : 21 Aug ,2025
Duration : 5 Days
Overview:
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 comprise 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.
Course Objectives:
At the end of this course, participant 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
Course Content:
1. 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
2. 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
3. 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
4. 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
5. 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
Targeted Audience:
Electricians
Electrical Supervisors
Plant Electricians
Operations & Maintenance Engineers & Supervisors
Maintenance Professionals
