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ICTD International Centre for Training and Development

Maintaining & Troubleshooting Electrical Equipment

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About the course

To successfully inspect and test electrical equipment, Electrical personnel must first fully understand the technology of the electrical equipment. After the successful start-up and subsequent continued operation, electrical equipment requires periodic inspection and testing which will be explained. The last updated technologies such as condition monitoring (offline and online) and partial discharge used for maintenance will be indicated. Safety and risk assessment required for the maintenance process will be highlighted.

This will ensure the electrical equipment operates correctly so that production is maximized in a safe, cost effective and efficient manner.

Delegates are encouraged to raise queries both during and at any time after attending the course and are also asked to bring with them any technical issues that they may have.

Course Objectives

Participants attending this program will:

Return to their respective organizations equipped with new or refreshed skills to ensure that electrical equipment is inspected, tested and operated in safe and a fashion that ensures reduced costs. On successful completion of this course, participants will have:

  • A better understanding of maintenance purposes and types.
  • A better understanding of inspection and testing methods
  • A better understanding of the updated electrical condition monitoring.
  • A better understanding of troubleshooting procedures
  • An improved capability in testing equipment (Generators, Transformers, Motors, Controllers, HV ad LV Circuit Breakers, UPS, ….)
  • A better understanding of safety issues.
  • A refreshed outlook on reading electrical drawings
  • A refreshed awareness of electrical safety concerns

Course Outline

DAY ONE

Maintenance Principles and strategies

  • Preventive Maintenance
  • Predictive Maintenance( (Condition-Based Maintenance)
  • Impact of Maintenance
  • Role of maintenance organization
  • Types of Maintenance

Procedures and Scheduling For Electrical Equipment maintenance

  • Introduction
  • Maintenance and Test Procedures
  • General.
  • Infrared Scanning
  • Fault and Load Flow Studies/Equipment Ratings
  • Electrical Equipment Monitoring
  • Maintenance Schedules and Documentation.
  • Electrical equipment maintenance schedules (Transformers, Generators, Power Cables, Batteries and Battery Chargers,..)

Testing, Troubleshooting Principles and Commissioning Guide Of Electrical Equipment

  • 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

DAY TWO

Condition Monitoring and partial discharge For Electrical Equipment

  • Approaches Based On Mathematical Models
  • 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

DAY THREE

Earthing Systems

  • Introduction
  • Equipment Earthing
  • System Earthing
  • Unearthed systems
  • Solid earthing
  • Resistance earthing
  • Reactance earthing

Distribution System Earthing

  • Earthing Via Neutral Earthing Compensator
  • Distribution transformers
  • Zig Zag transformers
  • Comparison of Methods (Advantages/Disadvantages)
  • Earthing System maintenance

Fundamentals, Maintenance and Troubleshooting for Motors, Motor Controller and Motor Starters

  • 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

DAY FOUR

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

DAY FIVE

Circuit Breaker Fundamentals, Maintenance, Service ,Testing And Troubleshooting

  • Fundamentals
  • Air Circuit Breakers.
  • Vacuum Circuit Breaker
  • SF6 Circuit breaker
  • Oil Circuit Breaker Ratings
  • Fuses
  • Trip Circuit Supervision
  • Circuit-Breaker Control
  • Low Voltage Molded Case Current Limiting Circuit Breakers
  • HV Circuit Breakers Maintenance
  • H.V 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
  • Transformer Preventative Maintenance
  • Transformer Inspection
  • Transformer Liquids
  • Dielectric Test
  • General Testing
  • Other Important Tests
  • Transformer Failure
  • Disassembly for Inspection
  • Common Transformer Abnormalities
  • Transformer Oil Tests
  • Fault Analysis

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

Safety And Risk Assessment

  • Touch And Step Voltage
  • Effect of electric shock on human beings
  • Electric shock and sensitive earth leakage protection
  • Sensitive earth leakage protection
  • Arc Flash
  • Risk assessment principals
  • How to assess the risks in your workplace?
  • How to conduct risk assessment?
  • Risk assessment Job Briefing and Planning Checklist
  • Case Studies

Course Methodology

A variety of methodologies will be used during the course that includes:

  • (30%) Based on Case Studies
  • (30%) Techniques
  • (30%) Role Play
  • (10%) Concepts
  • Pre-test and Post-test
  • Variety of Learning Methods
  • Lectures
  • Case Studies and Self Questionaires
  • Group Work
  • Discussion
  • Presentation

Who should attend

This course is intended for Electrical Engineers, Electrical Supervisors and Electrical Technicians engaged in the maintenance, inspection and testing of Electrical Equipment. Because the methods and examples are generic, personnel from all industries will benefit. Participants require a good understanding of electricity and magnetism and possess some relevant experience.

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