Commissioning, Inspecting, Testing and Maintenance for Low, Medium and High Voltage Electric Power Course

Course Overview:

The course will furnish a thorough knowledge of failure modes and diagnostic tests for power equipment such as transformers and circuit breakers as well as condition monitoring techniques.

The theory, construction, and maintenance of transformers will be introduced which includes various subjects such as preventive and condition based maintenance, oil and gas analysis, fault diagnostics, and troubleshooting, to name a few.

Moreover, diagnostic techniques for circuit breakers including maintenance of oil, air blast, SF6, and vacuum circuit breakers will also be covered. 

Aimed at engineers in power utilities and industrial plants, this program aims to provide a theoretical framework as well as hands-on training to improve the reliability and the safety and effectiveness of the equipment.

Course Objectives:

This course is designed to enable participants to: 

• Understand typical failure modes associated with power equipments 
• Understand typically used on- and off- line diagnostic tests for condition monitoring of power equipments 
• Understand the interrelationships of various on- and off- line diagnostic tests 
• Understand the interpretation of test results and computation of health index

Who Should Attend?

This course is intended for junior & senior electrical and non-electrical engineers, who are involved in the operation, planning, maintenance, protection, control, and analysis of working in power utilities and industrial plants (generation, transmission, and distribution.

Course Outlines:

Transformer Theory

• Ampere-turns and energy balance
• Turns ratio
• Design fundamentals and constraints
• Leakage Reactance
• Losses
• Ratings
• Voltage regulation
• Types of transformers
• Phasor diagrams
• Connections
• Flux
• Taps
• Impedance
• Two and three winding transformers
• Autotransformers
• Zero sequence impedance
• Standards
• Oil and paper
• Core steel
• Conductors, copper and aluminum

Maintenance

• Preventive maintenance
• Reliability centered maintenance
• Condition-based maintenance
• Combination of condition-based and preventive maintenance
• Recommended standards and references
• Maintenance and test procedures
• Infrared scanning
• Fault and load flow studies/equipment ratings
• Maintenance schedules and documentation
• Safety during maintenance

Internal Transformer Construction

• Core
• Windings
• Thermal considerations
• Tap windings
• Tanks
• Drying of paper
• On load tap changers (OLTC)
• Voltage controllers
• De-energized tap changers (DETC)
• Protective devices (on transformer)
• Bushings
• Surge arrestors
• Factory test
• Field tests
• Ratio meter
• Winding resistance
• Voltage impedance
• Power factor

Operation and Maintenance of Power Transformers

• Substation layout
• Earthing
• Abnormal conditions
• Fire protection
• Parallel operation
• Maintenance of Oil Immersed Transformers Oil
• Gas in oil analysis
• Water in oil analysis
• Drying of insulation
• Gaskets
• Infra-red scans
• Maintenance and Troubleshooting Sample operating & maintenance instructions
• Drying technique
• Problem and failure investigations
• Transformer diagnostics
• Transformer troubleshooting  

Circuit Breaker Diagnostic and Maintenance

• Diagnostic techniques
• Batteries condition monitoring
• Substation Maintenance Techniques Structures
• Fuses, arresters, switches
• Oil circuit breakers
• Air blast CB
• SF6 and vacuum CB
• Operating mechanisms
• Switchgear maintenance practices
• Troubleshooting guides
• Switchgear electric circuitry troubleshooting