Jadwal Pelatihan Circuit Breakers Operation and Maintenance
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INTRODUCTION
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. This following are important aspects of the circuit breakers:
Electric power systems are designed to be as fault free as possible through appropriate network design, equipment design, proper installation and on-going maintenance.
The Circuit breaker and its associated fault detection equipment, protective relaying, is an extremely important device, through its role of clearing short-circuit currents, disconnecting faulty elements from the power network, and thus maintaining the overall integrity of the power network
If faults are not controlled they can cause unnecessary loss of electricity service with all of its many ramifications.
The circuit breaker selection and arc extinction methods are of great importance
Minimising downtime by proper and systematic maintenance program
OBJECTIVES
Delegates will gain a detailed appreciation of the following:
The importance of preventive maintenance check and servicing of the various types of circuit breakers
Implementation of safe systems of work and operations
Co-ordination of maintenance activities and maintaining system safety
To be able to understand the component functionalities of the gas and vacuum circuit breakers
Methods of arc extinction for MV HV circuit breakers
Routine inspections and the functions of the micro processor component in the circuit breakers
OUTLINE
1. Introduction – reasons for faults – and classification of faults
Distinction between load and fault current
Sources of short-circuit current
Introduction to fault calculations
Balanced and unbalanced faults
Overview of Power System Protection
Measurement – voltage and current transformers
Protective device characteristics
Types of protection systems
The role and importance of the circuit breaker in power systems
2. General principles of arc extinction
Overview of types of circuit breaker
Air-Break
Vacuum
Gas
Other related switching devices
The single-line diagram
Substation layouts
Air-break
Principles of arc extinction
C. circuit breaking
C. circuit breaking
Contacts and arc initiation
Arc chutes
Performance characteristics
General construction Principles
3. Vacuum
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 requirement
4. SF6 Gas
Properties of SF6
Principles of arc extinction
Features of construction
Mechanism principles
Insulation principles
Gas leak problems
Specific supervision requirements
Circuit power factor considerations
Maintenance and testing requirements
5. International Standards
Importance and relevance to specifications
ANSI and IEEE
IEC and IEE
Circuit breakers and power system
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
6. Exercises and Case Studies
WHO SHOULD ATTEND?
Electrical Professionals
HSE personnel
Technicians and Supervisors
Professionals responsible for the operation and maintenance of distribution equipment, who will benefit from sharing experiences in the planning, organisation, and implementation of maintenance activities.