Course Description
LV and HV Circuit Breakers training course provides comprehensive knowledge of the design, operation, maintenance, and testing of circuit breakers used in low and high voltage electrical systems. Circuit breakers are essential protection devices that safeguard equipment and personnel by interrupting fault currents and ensuring system stability in power networks. Understanding their construction, operation, and maintenance is critical for maintaining reliable electrical infrastructure.
This course covers different types of circuit breakers, including oil, air, vacuum, and SF6 gas circuit breakers, with a strong focus on arc extinction methods and operational principles. Participants will also explore testing procedures, condition-based maintenance strategies, and compliance with IEC standards. The course emphasizes practical understanding of system performance, fault management, and safety requirements. Through real-world examples and technical analysis, this LV and HV Circuit Breakers training course equips professionals with the skills to ensure efficient operation, reliable protection, and extended equipment lifespan.
What you will achieve
LV and HV Circuit Breakers training course aims to develop participants’ technical understanding of circuit breaker systems, their operation, and maintenance practices in electrical power systems. It enhances skills in fault protection, testing, and performance optimization.
- Understand the role and importance of LV and HV circuit breakers
- Identify key components and operating mechanisms of circuit breakers
- Explain different arc extinction methods including air, vacuum, and SF6
- Apply maintenance and testing procedures for circuit breakers
- Understand monitoring and care of SF6 circuit breakers
- Improve system reliability through effective operation practices
- Ensure compliance with IEC standards and safety requirements
How the course is delivered
LV and HV Circuit Breakers training course is delivered through a structured and interactive learning approach that combines theoretical knowledge with practical application. Instructor-led sessions explain circuit breaker types, construction, and operating principles in detail, supported by visual materials and real-world examples. Participants will gain a clear understanding of fault protection systems and arc extinction techniques.
Video demonstrations and technical discussions are used to illustrate modern circuit breaker technologies and maintenance practices. Participants are encouraged to engage in group discussions and ask questions during wrap-up sessions to clarify operational challenges. Case studies highlight real-world circuit breaker failures and maintenance solutions. Practical insights into testing instruments, inspection routines, and remote monitoring systems are also covered. This blended learning approach ensures participants can confidently apply LV and HV circuit breaker operation, testing, and maintenance practices in line with industry standards.
Designed for
LV and HV Circuit Breakers training course is designed for technical professionals involved in the operation, maintenance, and supervision of electrical systems. It is ideal for individuals seeking to strengthen their understanding of circuit breaker technologies and improve system reliability and safety.
- Operations and maintenance engineers, supervisors, and technicians
- Maintenance technicians working in electrical systems
- Electrical support engineers in maintenance operations
- Power station engineers and technicians
- Electrical superintendents and system operators
- Professionals involved in electrical protection and maintenance
Daily programme
- Distinction between load and fault current
- Sources of short-circuit current
- Introduction to fault calculations
- Balanced and unbalanced faults
- Measurement - voltage and current transformers
- Types of protection systems
- The role and importance of the circuit breaker in power systems
- Air-Break
- Vacuum
- Gas
- Substation layouts
- Principles of arc extinction
- General construction principles
- Performance characteristics
- Arc chute functions
- History – The early years
- The vacuum arc – An overview
- Current interruption in vacuum
- Methods of keeping the arc diffuse
- Current chopping – general implications
- Vacuum interrupters in series
- Design of vacuum switchgear
- Maintenance and testing requirements
- 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
- Circuit breaker failure and the effects on power system operation
- Testing instruments for circuit breakers
- Circuit breaker inspection and routine tests
- Maintenance strategies
- Importance of circuit breaker maintenance
- Remote monitoring of circuit breakers
- Case studies
- Wrap up session with Q&A
Certification & accreditation
BII Certificate of Completion
BII Certificate of Completion Upon successful completion, participants receive a BII Development Institute Certificate of Completion with a unique reference code that is independently verifiable. Our certificates are recognised internationally and reflect successful completion of your chosen programme.
