Operation and Maintenance of Circuit Breakers and Switchgears
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Operation and Maintenance of Circuit Breakers and Switchgears Course
Introduction:
The primary function of a circuit breaker is to control the activation and deactivation of electrical circuits, both in normal and abnormal operating conditions. It is crucial for engineers and technicians to possess a thorough understanding of circuit breakers and switchgear specifications, operations, testing, and maintenance.
This course has been specifically designed to equip participants with the necessary technical knowledge, practical experience, and skills in this field. Through this course, participants will gain a comprehensive understanding of circuit breakers and switchgear, enabling them to effectively handle their specification, operation, testing, and maintenance requirements.
Course Objectives:
By the end of this course the participants will;
- Understand the arc phenomena and circuit interruption.
- Know the different types of circuit breakers and industrial switchgears.
- Be able to select circuit breaker specification.
- Know the maintenance procedures.
- Be able to do all tests on circuit breakers.
- Be able to detect circuit breakers troubleshooting.
- Be able to use circuit breaker curves and make protection coordination
Who Should Attend?
The course is designed to electrical engineers and highly qualified technicians concerned with circuit breakers and switchgears in electrical utilities, electrical distribution and transmission.
Course Outlines:
General Introduction
- Electrical engineering basic concepts
- Three phase review and per unit
- Voltage levels
- One line and three line diagram
- Generation system layout
- Transmission system layout
- Substation system layout
- Distribution system layout
- Review of short circuit current calculation.
Industrial Switchgears
- Fuses
- Auto-reclosers
- Automatic sectionalize
- Circuit Breakers
- Isolator switches
- Load switches
- Relays
- Current transformers
- Voltage transformers
Arc Phenomena and Circuit Interruption
- Arc phenomena
- Maintenance of the Arc
- Properties of Arc
- Arc Interruption theory
- Circuit Breaker Rating
- Circuit constants and circuit conditions
- Conditions of severity
- Restriking voltage transient
- Duties of Switchgear
Low Voltage Circuit Breakers
- Low voltage molded case current limiting circuit breakers
- Low voltage molded case circuit breakers with high breaking capacity
- Insulated case circuit breakers
- Low voltage air circuit breakers
- Low voltage circuit breakers specification
Medium and High Voltage Circuit Breakers
Air Circuit Breakers
- Method of increasing arc resistance
- Plan break type
- Magnetic blow out type
- Arc splitter type
- Application
- Construction and operation
Oil Circuit Breakers
- Arc rupture under oil
- Advantages of oil
- Disadvantages of oil
- Plan break oil circuit breakers
- Arc control circuit oil breakers
- Minimum oil circuit breakers
- Construction and operation
SF6 Circuit Breakers
- Basic Features of SF6 Breakers
- Dielectric properties of SF6
- Quenching properties of SF6Construction of SF6 breaker
- Puffer type breakers
Vacuum Circuit Breakers
- The vacuum medium
- The vacuum arc
- Vacuum arc stability
- Vacuum break down
- Vacuum switch construction
- Applications of vacuum circuit breakers
Other Type of Circuit Breakers
- Synchronies circuit breakers
- Dc circuit breakers
Medium and high voltage circuit breakers specification
Circuit Breaker Maintenance and Services
- Inspection
- General inspection technical procedure
- Daily inspection of circuit breakers
- Monthly inspection of circuit breakers
- Annual inspection of circuit breakers
- Disassembly
- Cleaning
- Tightening
- Lubrication
- Adjustment
- Circuit Breakers Testing
- Classification
- Description of a simple testing station
- Equipment’s used in testing
- Testing procedure
- Direct testing
- Test report