Advanced Circuit Breakers Operation and Maintenance

INTRODUCTION
This Advanced Circuit Breakers Operation and Maintenance training course begins with the fundamental principles of arc extinction with progression of incorporating green gas resulting in the reduction of global warming potential and reduction of carbon footprint.
Circuit breakers play an important role in the safe distribution of electrical power. The equipment needs to be operated, maintained, and installed in a safe manner securing continuity of supply to consumers. Circuit switchers have been developed to overcome some of the limitations of fusing for substation power transformers. The method or arc extinction determines the types of circuit breaker.

OBJECTIVES
By the end of this training course, participants will be able to:
• Appreciate the importance of preventive maintenance check and servicing of the various types of circuit breakers
• Determine safe operation of the gas insulated switchgear circuit breaker and its associated components
• Develop maintenance activities and maintaining system safety
• Understand the component functionalities of the gas and vacuum circuit breakers
• Explain methods of arc extinction for live tank and dead tank circuit breakers
• Recognize the importance of installing high voltage circuit breakers with green gas and clean air arc extinction designs

COURSE OUTLINE
DAY 1
• Distinction between Load and Fault Current
• Sources of Short-circuit Current
• Introduction to Fault Calculations
• Symmetrical and Asymmetrical Faults
• Overview of Power System Categories and with Time Current Curves
• Importance of Instrument Transformers
• Types of Protection Systems with LSIG Characteristics
• The Role and Importance of the Circuit Breaker in Power Systems
DAY 2
• Air-Break or Air Circuit Breaker
• Performance Characteristics and Arc Chute Functions
• Vacuum Circuit Breaker Design and Construction
• High Voltage Live Tank and Dead Tank Vacuum Circuit Breaker
• Maintenance and Testing Requirements for VCB
• Gas Insulated Switchgear SF6 Circuit Breaker Construction and Operations
• Substation Layouts and Merits
• Digital Substation Circuit Breakers

DAY 3
• Hybrid High Voltage Circuit Breakers
• Green Gas for Grid or g3 alternative to SF6
• SF6 alternative Eco Efficient Gas
• Air Plus Insulation an alternative to SF6
• Fluor ketone alternative to SF6
• 8VN1 Clean Air Insulation
• Blue GIS VCB with Clean Air Technology
• Roles of Circuit Breakers and Substation Protection
DAY 4
• Properties of SF6
• Principles of Arc Extinction
• Features of Construction
• Insulation Principles
• Gas Leak Problems
• Specific Supervision Requirements
• Circuit Power Factor Considerations
• Maintenance and Testing Requirements
DAY 5
• Importance and Relevance to Specifications
• Circuit Breaker Failure and the Effects on Power System Operation
• Circuit Breaker Inspection, Testing and Maintenance Program
• The Principles of Modern Substation Control Systems
• Power Circuit Breaker Maintenance