Circuit Breaker Schematic Diagrams and Troubleshooting
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Circuit Breaker Schematic Diagrams and Troubleshooting Course
Introduction:
This course aims to provide participants with up-to-date knowledge on the most recent advancements in circuit breaker technology as well as an overview of some of the most popular and modernized aspects of maintaining low, medium, and high voltage switchgear. It is imperative to acknowledge that a vast array of equipment is presently utilized on low, medium, and high voltage switchgear. In a utility distribution system as well as in a manufacturing or power plant, switchgears are crucial to the distribution and control of electrical power. Ineffective maintenance procedures can result in a power system's loss of dependability and efficiency.
Course Objectives:
By the end of this training course, participants will be able to:
- List the voltage convention classifications used in this course.
- Describe switchgear construction.
- Describe a ground fault relay system.
- Describe the three basic types of low and medium voltage circuit breaker contacts.
- Describe the molded case circuit breaker.
Who Should Attend?
This training program is suitable for a wide range of professionals but will greatly benefit:
- Electric maintenance & Design Engineers.
- Project Engineers.
- Electrical supervisors.
- Senior technicians & formats.
- Technical support Engineers.
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
Industrial Switchgears
- Fuses
- Auto-reclosers
- Automatic sectionalized
- Circuit Breakers
- Isolator switches
- Load switches
- Relays
- Current transformers
- Voltage transformers
CB Design Specification Based on Short Circuit Current Level
- Per unit system
- Faults on power systems
- Transient phenomena in power system.
- Symmetrical component analysis of three phase network
- Network connection for various fault types
- Current and voltage distribution in system due to a fault
- Effect of system on zero sequence quantities
- Computer programs based short circuit calculation.
CB Design Specification Based on 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
- Class A ultra fast transients
- Class B system transients
- Class C low transients
- Transmission line transient
- Switching transients
- Duties of Switchgear
LV 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
Modern MV and HV Vacuum CB
- Introduction
- Advantages of vacuum interruption
- Vacuum contactors and interrupters
- The vacuum medium
- The vacuum arc
- Vacuum arc stability
- Vacuum break down
- Vacuum switch construction
- Applications of vacuum circuit breakers
Modern MV and HV SF6 CB Introduction
- Basic Features of SF6 Breakers
- Dielectric properties of SF6
- Quenching properties of SF6
- Construction of SF6 breaker
- SF6 CB types
- Puffer type SF6 breakers
- Double Pressure System
- Single Pressure Puffer-Piston System