Safe Operations & Maintenance of Circuit
Safe Operations & Maintenance of Circuit
OBJECTIVES
- Understand the various types and operations of circuit breakers
- Determine the components and operations switchgears
- Explain the different types of testing instruments
- Analyse the common faults in an electrical installation
- Inculcate greater confidence, working safely on circuit breakers and switchgears
WHO SHOULD ATTEND?
- Electricians
- Electrical supervisors
- Plant electricians
- Operations & maintenance engineers, supervisors & technicians
- Maintenance technicians
COURSE OUTLINE
Day One
The Technology of Circuit Breakers and Switchgear
- Typical substation arrangements and motor control centres
- Motor and generator fault contributions
- Low, medium and high voltage equipment in an electrical installation
- Name plate ratings – interpretation
- CT’s and VT’s operation, construction and classifications
- Basic protection requirements
Day Two
Operation of various types of interrupting equipment
- High voltage fuses and fused switches
- Moulded case circuit breakers
- Air and load break switches operation and construction
- Vacuum contactors applications
- Vacuum circuit breakers operations and characteristics
- SF6 circuit breakers types and operation principles
Day Three
The use of test equipment for operations and maintenance
- Digital voltmeter (DVM), oscilloscope, insulation tester applications
- Temperature probes/ IR pyrometers
- Cable fault locators and techniques
- NEC check lists to ensure the correct installation
- Troubleshooting methodology for electrical equipment
- Group exercises and case studies
Day Four
The interpretation and use of drawings and job plan
- Single-line electrical drawings control schematics
- Switchgear name plate information
- Logic and standard symbols
- Procedure preparation for fault finding
- Documentation and follow up safety procedures for switchgears
- Safety considerations and training
Day Five
The identification and repair of problems/failures
- Common mode failures in switchgears
- Phase imbalance and phase sequence effects
- Ground faults – cable and busbar faults
- A review of Safety Requirements
- Hazardous area classifications
- NEC electrical codes applications