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COURSE 05
HV/MV Circuit Breakers – Theory, Testing & Condition Assessment
Breaker operating principles, interruption technologies and diagnostic testing.
COURSE OVERVIEW
A practical course built around the work.
Provides an understanding of HV and MV circuit breaker operating principles, mechanisms and interruption technologies, together with commissioning and diagnostic testing methods.
COURSE OBJECTIVES
By the end of this course, participants will be able to:
- Explain vacuum and SF₆ interruption principles and operating mechanisms
- Understand trip and close circuits and auxiliary contacts
- Perform contact resistance, insulation, timing and motion tests
- Analyse coil current, timing and motion signatures
- Identify common failure modes
- Assess breaker condition against maintenance and commissioning requirements
KEY TOPICS
What the session covers.
- Vacuum and SF₆ circuit breaker principles
- Operating mechanisms
- Trip and close circuits
- Auxiliary contacts
- Contact resistance
- Insulation resistance
- Opening and closing timing
- Pole synchronism
- Travel and motion analysis
- Coil current analysis
- Minimum operating voltage
- Mechanical and electrical functional testing
- Interpretation of timing and motion signatures
- Common failure modes
- Condition assessment
- Maintenance and commissioning requirements
DELIVERY
Practical, relevant and shaped to your team.
Delivered as a combination of classroom theory and practical, hands-on sessions using industry test equipment. Courses can be run at your site or ours, and can be tailored to your equipment, experience level and project needs.