Safe Operation and Maintenance of Circuit Breakers and Switchgear Course

Course Overview:

This course delves into the understanding for Circuit Breakers and Switchgear, the operations, maintenance as well as troubleshooting. Participants are acquainted with various interrupting devices such as vacuum and SF6 gas circuit breakers, diagnostic tools, and testing methods for fault.

The course discusses problems encountered during electrical installation such as harmonics, phase imbalance together with Troubleshooting techniques. 

This course is perfect for electricians, electrical supervisors, and maintenance personnel as it provides them with knowledge on how to effectively operate, maintain, and repair circuit breakers and switchgear as a means to enhance overall performance and reliability of the system.

Course Objectives:

Upon successful completion of this course, the delegates will be able to:

• Understand the various types and operations of circuit breakers
• Determine the components and operations switchgears
• Explain the different types of testing instruments
• Analyze the common faults in an electrical installation
• Inculcate greater confidence, working safely on circuit breakers and switchgears

Who Should Attend?

This training course is suitable for a wide range of technical professionals but will greatly benefit:

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

Course Outlines:

The Technology of Circuit Breakers and Switchgear

• Typical substation arrangements with circuit breaker arrangements
• Low and medium voltage motors operations and characteristics
• Motor starting methods and motor control centres
• Nameplate ratings and interpretation
• Motor and generator fault contributions
• Low, medium and high voltage equipment in an electrical installation

Operation of Various Types of Interrupting Equipment

• CT's and VT's operation, construction and classifications
• Basic protection requirements and LSIG
• Molded Case circuit breakers
• Air and load break switches, reclosers operation and construction
• Vacuum contactors applications
• Vacuum circuit breakers operations and characteristics

Maintenance of Gas-Filled Circuit Breakers

• Conventional Sulphur hexafluoride (SF6) gas circuit breaker construction and operation
• New green grid gas for electrical switchgear
• SF6 gas leak detection methods
• Dew point and purity tests
• IAC and partition classes
• Vacuum interrupter and SF6 circuit breakers

The Use of Test Equipment for Operations and Maintenance

• Digital voltmeter (DVM), oscilloscope, insulation tester applications
• State of the art circuit breaker tester
• Motor diagnostics instrument
• Circuit breaker routine tests
• NEC checklists to ensure the correct installation
• Troubleshooting methodology for electrical equipment

The Identification and Repair of Problems/Failures

• Common electrical installation faults
• Harmonics and its effects
• Phase imbalance and phase sequence effects
• Procedures for fault finding
• Discussion on common faults and incidents