Electrical engineering courses

Electrical inspection & testing

Ref No: 2015036

INTRODUCTION

It’s easy to take electricity for granted - just flick a switch and the light comes on. But electricity can also be an invisible danger that can cause shocks, severe burns and death, as well as fires and explosions.
In some cases, there is no warning of the danger to come. Fortunately, with a proper system of checking and testing, you can protect yourself, your staff and property.
By law, you are required to maintain your electrical systems and appliances in a safe condition.  To achieve this you will need to carry out an assessment to determine what electrical systems and equipments you have in the workplace and how they are used, together with details of the servicing and maintenance procedures. Once you have this information, you should be able to decide whether you need to do anything more.
It is probably best to leave repairs and major works to a competent electrician. But when you consider that 95% of faults and damage can be found by visual inspection ie just by looking, you may decide to do the checking yourself.
Electrical testing must be carried out by a competent person or electrician, using the correct equipment. Unlike visual inspection, which can only spot damage, testing will ensure that the electrical system and appliances are functioning correctly, and that they are properly earthed, etc.

OBJECTIVES

1- Identify the methods of testing and commissioning electrical switch gear/equipment in accordance with electricity supply industry procedures.
2- Interpret test results to ensure electrical equipment functions in accordance with electricity supply industry specifications.
3- Obtain and analyse information on system diagrams/plans to ensure the inspection & testing electrical equipments can be completed in accordance with electricity supply industry standards.
4- Identify and interpret all construction drawings required to complete the task in accordance with electricity supply industry standards.
5- Identify the resources required, including personnel, plant, equipment and tools to ensure the task can be completed in accordance with electricity supply industry standards and procedures.
6- Intended to provide theoretical and practical instruction on the testing and repair of HV/LV equipment of various types.

CHAPTER 1: INTRODUCTION AND BASICS
1- Introduction
2- Magnetic field
3- Magnetic and electric fields
4- Electromagnetism
5- Electromagnetic induction
6- Generating electrical current
7- Three phase system
8- Worldwide ac voltages and frequencies
9- Per-unit values
10- Do it yourself

CHAPTER 2 : ELECTRICITY SUPPLY
1- Introduction
2- Standard voltages
3- Variations of voltage and frequency
4- Systems of supply
5- Industrial distribution systems
6- Low voltage distribution circuits
7- Distribution boards 
8- Internal distribution 
9- Distribution fuseboards 
10- Ring circuits 
11- Domestic distribution systems 


CHAPTER 3 : PROBLEMS RELATING TO OHM'S LAW
1- Introduction
2- Practical problems involving Ohm's law
3- Problems relating to installation faults in series
4- Resistances in series formation
5- Installation problems involving ohm's law
6- Summary

CHAPTER 4: OIL TESTING
1- Definitions
2- Functions of transformer oil
3- Transformer oil properties
4- Transformer oil standards
5- Hydrocarbon compounds in transformer oil
6- Moisture problems
7. Factors affecting transformer oil properties
8- Cellulose  degradation
9- Global view 
10- Oil dielectric strength test
11- Relative water content test
12- Physical & chemical tests (polar characteristics of oil)
13- Dielectric losses angle & resistivity test (power factor test)
14- Transformer dissolved gas-in-oil analysis (dga)
15- Oil color test
16- Insulating oil sampling procedure
17- Oil purification and dehydration
18- Yearly insulating oil testing
19- Oil aging
20-Preventive maintenance procedures for transformer oil
21- Do it yourself

CHAPTER 5: TRANSFORMER TESTING
1- Test data
2- Abnormal operating conditions of power transformer
3- Reasons for transformer testing
4- Transformer performance assurance
5- Classification of transformer tests
6- Winding resistance test 
7- Polarity test
8- Ratiometer test
9- No-load losses test
10- Load losses test
11- Percent impedance voltage measurement
12- Leackage reactance measurement
13- Efficiency test
14- Winding insulation resistance test
15- Winding insulation capacitance & dissipation factor (tan ) test
16- Sudden short circuit withstand test
17- Oil pressure test
18- Temperature rise test
19- Impluse testing
20- Transformer arrival: handling, inspection and pre-commissioning
21- Do it yourself

CHAPTER 6: MOTORS AND GENERATORS
 1- Introduction
 2- Nema classification of motors and generators
 3- Applications of motors and generators
 4- AC motors
 5- AC generators maintenance
 6- DC motors
 7- DC generators
 8- Motor and generator insulation systems
 9- Motor and generator maintenance
 10-Testing of motors and generators
 11-Other insulation test methods

CHAPTER 7: CATHODIC PROTECTION
1- Introduction
2- Why metals corrode?
3- Factors that influence corrosion in soil
4- How cathodic protection works
5- Uses of cathodic protection
6- Protection criteria
7- Types of cathodic protection
8- Stray currents interference
9- Mitigation of stray current corrosion
10- Cathodic protection for tower foundations using induction from the transmission line electric field
11- Drainage protection of earth-return circuits laid in stray currents area
12- Isolation application
13- Cathodic protecion of pipe type cables
14-Optimization technique for the cathodic protection of complex underground conductor networks
15- Steel grounding system in a heavy industrial plant

CHAPTER 8: INSPECTION AND TESTING
1- Needs for inspection and testing
2- Identification and notices
3- Visual inspection
4- Continuity tests
5- Polarity test
6- Insulation tests
7- Phase sequence test
8- Earthing tests
9- After testing

CHAPTER 9: EARTHING INSPECTION
1- Earthing principles
2- Protective earthing equipments
3- Soil resistivity
4- Earth
5- Grounding electrodes
6- Earthing conductors
7- Equipment grounding
8- Bonding  
9- Practical considerations
10- Methods for decreasing earthing resistance
11- Ground inspection wells
12- Software
13- Ground resistance measurements
14- Protective grounding of power lines

CHAPTER 10 : SAFETY WORKING PRACTICES AND GENERAL GUIDELINES
1- Common causes of accidents
2- General dos and don'ts: your responsibilities
3- Installation guidelines
4- Fire hazards
5- Lifting techniques
6- First aid


 

Engineers, supervisors and technicians with a responsibility for the inspection, testing and maintenance of HV/LV electrical equipments.

Trainees shall receive a portfolio containing a comprehensive course manual.

Attendees shall receive a certificate of attendance from AMAD Tech.