Electrical Equipment: Selection, Applications, Operation, Diagnostic Testing, Troubleshooting and Maintenance Course

Introduction:

Maximum efficiency, reliability, and longevity of electrical equipment such as the various types of motors, variable-speed drives, transformers, generators, rectifiers, inverters, uninterruptible power systems, circuit breakers, fuses, and power station electrical and protective systems are of great concern to many industries. These objectives can only be achieved by understanding the characteristics, selection criteria, common problems and repair techniques, preventive and predictive maintenance.

Course Objectives:

By the end of the training, participants will be able to:

·       Comprehend the hazards when working with electrical power systems. This includes live testing/working, electrical arc flash blast, electrocution, short circuits, overloads, earth faults, fires.

·       Perform electrical switching operations safely on all 415V – 11kV switchgear and associated equipment in preparation for maintenance tasks.

·       Understand the correct methodology and safe operation when working on electrical equipment, switchgear on electrical distribution systems, and all of the associated electrical plants and to be aware of all the associated hazards.

·       Understand diagnostic testing and inspection, advanced fault detection techniques, critical components, and common failure modes.

·       Study selection criteria, commissioning requirements, predictive and preventive maintenance, reliability, testing, and cost.

·       Discover the maintenance required to minimize their operating cost and maximize their efficiency, reliability, and Longevity

Who Should Attend?

This course is designed for both developing engineers & experienced electrical personnel working within commercial and heavy industrial environments within oil and gas processing plants. The course provides personnel with the knowledge and competence to perform quality maintenance, installation, testing, and inspection of generic electrical plant & equipment.

Course Outlines:     

Testing, Troubleshooting Principles, and Commissioning Guide of Electrical Equipment

• Introduction
• Basic principles in using a drawing and meter in troubleshooting circuits
• Checks for circuit continuity with disconnected supply
• Checks for circuit continuity with live supply
• Tests and methods
• Testing devices
• Testing and Commissioning Methods
• Testing and Commissioning Procedures.
• Maintenance of Particular Types of Electrical Equipment
• Nomo gram for temperature correction
• Test voltages for Commissioning and Maintenance
• Recommended insulation values for equipment

Principles of Maintenance

• Preventive Maintenance (PM)
• Basics
• Elements
• Predictive Maintenance (PdM) (Condition-Based Maintenance) (CBM )
• The Basic Concept of Predictive Maintenance
• Benefits of Predictive Maintenance
• Impact of Maintenance
• Role of a maintenance organization

Types of Maintenance

• Maintenance Improvement
• Corrective Maintenance
• Preventive Maintenance
• Reactive Maintenance
• Condition Monitoring
• Scheduled Maintenance

Condition Monitoring For Electrical Equipment

• Approaches Based On Mathematical Models
• Reliability Centered Maintenance (RCM)
• Condition Based Maintenance (CBM)
• Partial Discharge
• Insulation Resistance Monitoring
• Insulation resistance test (IR)
• Megger test
• Polarization index test
• Dc hi-pot test
• Measuring insulation degradation
• Insulation power factor
• On line measuring partial discharge activity for insulation
• On-Line Monitoring of Transformers
• Local Indications
• Thermography
• PDA - Partial Discharge Analysis
• Insulating Oil Properties And Tests
• Test for Dielectric Strength
• Water Content in Oil
• Acidity Test (Neutralization Number)
• Oxidation Inhibitor
• Interfacial Tension Test (IFT)
• Oil Color
• Oil Power Factor Test
• Insulating Oil Dissolved Gas Analysis (DGA)
• Understanding cable thermal behavior after installation
• Optical cable Temperature Monitoring

Earthing Systems

• Introduction
• Equipment Earthing
• System Earthing
• Unearthed systems
• Solid earthing
• Resistance earthing
• Reactance earthing
• Classification o Supply / Installation System Earthing
• Earthing Via Neutral Earthing Compensator
• Distribution transformers
• Zig Zag transformers
• Comparison of Methods (Advantages/Disadvantages)
• Evaluation of earthing methods
• Testing the earthing electrode Resistance

Generator Fundamentals Maintenance, Testing, and Trouble Shooting

• Principles of Generators
• AC Generators
• Generator excitation and voltage control
• Diesel generator sets
• Synchronizing of generators
• Load sharing
• Load shedding
• Preventative Maintenance
• Trouble Shooting
• General Procedure
• Generator Does Not Produce Voltage
• Generator Produce Low Voltage
• Generator Produce High Voltage
• Generator Voltage Fluctuating
• Fault analysis for Generator Control Circuit

Motor’s Fundamentals, Maintenance, and Troubleshooting

• Fundamentals
• Types of A.C Electric Motors
• Principles of Operation of the Induction Motor
• Enclosures and Cooling
• Power for induction motors
• Starting of Induction Motors
• Motor Operation at Reduced Voltage
• Power Factor Correction
• Motor Testing
• Motor Failures

Circuit Breaker Fundamentals, Maintenance, Service, Testing, and Troubleshooting

• The purpose of electrical switchgear
• The safe operation of electrical switchgear
• Fundamentals
• Air Circuit Breakers.
• Vacuum Circuit Breaker
• SF6 Circuit breaker
• Oil Circuit Breaker Ratings
• Trip Circuit Supervision
• Circuit-Breaker Control
• Low Voltage Molded Case Current Limiting Circuit Breakers
• Protective Devices (Fuses, MCB’s & RCD’s)
• HV Circuit Breakers Maintenance
• HV Circuit-Breakers Tests
• Low voltage Circuit Breaker Maintenance

Transformer Fundamentals, Maintenance, Testing, and Troubleshooting

• Principles of Transformers
• Saturation Curve & Voltage Ratio of Transformers
• Current Ratio & Impedance of Transformers
• Transformer Construction
• Transformer losses and efficiency
• Transformer Cooling & Types
• Transformer Polarity
• Transformer Applications
• Transformer Accessories
• Maintaining Transformers
• Preventative Maintenance
• Transformer Inspection
• Transformer Liquids
• Dielectric Test
• General Testing
• Other Important Tests
• Transformer Failure
• Disassembly for Inspection

UPS, Rectifiers, Inverters, and Batteries Fundamentals Maintenance, Testing and Troubleshooting

• UPS Fundamentals
• Rectifications & Inverters
• Inverters
• Batteries and Battery Charging
• Battery Charging Tests
• Safety During Battery Charging
• Mixing Electrolyte
• Battery discharge test.
• Troubleshooting Guide