EL05
Course Contents
Module 1 - Main Concepts of Electric Distribution Systems
Key Topics
- Introduction and Background.
- Duties of Distribution System Planners.
- Factors Affecting the Planning Process.
- Planning Objectives.
- Solutions for Meeting Demand Forecasts
- Distribution System Configurations.
Module 2 – Transformers
Key Topics
- Classifications, Rating & Specifications.
- Power Dry & Oil transformers.
- Connections and voltage taps.
- Transformer impedance & K-Factor.
- Insulation methods.
- Cooling techniques.
- Star-point earthing.
- Accessories and protection.
Module 3 – Earthing Systems & Bonding
Key Topics
- Equipment Earthing & bonding.
- System Earthing.
- Earthing Via Neutral Earthing Compensator.
- Comparison of Methods (Advantages/Disadvantages).
- Evaluation of earthing methods.
- Earthing Systems in LV Distribution Networks.
- Testing the earthing electrode Resistance & Earthing grids
Module 4 – Low & Medium Voltage Switchgear
Key Topics
- Load currents and fault currents.
- Breaking and making capacities.
- Switchgear capabilities and ratings.
- Types of switchgear manufactured today and their applications.
- Comparison of different types of insulation methods (air, oil, vacuum, SF6).
- Advantages and disadvantages of different types of medium voltage switchgear.
- Preventative maintenance.
- Future trends.
Module 5 – Power Cables
Key Topics
- Different types of LV & MV cables.
- Insulation types and their applications
- Cable losses and voltage drop.
- Cable Sizing, Cable ratings, and short-circuits.
- Single core vs three core cables.
Module 6 – Protection and Protective Relays
Key Topics
- Instrument Transformers (CT & VT).
- Electrical Faults and Protection Schemes and Principles, Purpose of protective relays, Overcurrent and Earth Fault protection, etc….
- Fuses, High breaking Capacity Fuses (HRC).
- Generator protection schemes.
- Feeder protection cable feeders and overhead lines.
- Transformer protection schemes.
- Switchgear (busbar) protection.
- Motor protection relays.
- Coordinated distribution networks.
- Recommended protection schemes of international standards and some brand name manufacturers (Siemens, Schneider, etc…).
Module 7 – Uninterruptible Power Supply Systems (UPS) & DC Storage Batteries
Key Topics
- Description of UPS system & operation of UPS.
- Commissioning plan for the UPS system.
- Installation inspections and component testing of the UPS system.
- Energizing and test of the UPS system.
- Possible failures and corrective actions.
- Purpose, Construction & Function of Batteries.
- Lead-Acid & Alkaline Batteries.
- Importance of good ventilation.
- Specifications & ratings of Batteries.
- Battery sizing.
- Requirements of International Standards for Eye washing.
- Exhaust Fans.
Module 8 – AC & DC Motors
Key Topics
- DC motors.
- AC motors (1-Ph & 3-Ph).
- Induction Motors.
- Synchronous motors.
- Universal AC/DC motors.
- Principles of operation and performance of AC Motors.
- Fundamental principles of speed control of IM.
- Motor design & duty cycles.
- Selecting and sizing motors.
- Different Methods of Starting Induction Motor.
Module 9 – Hazardous area classifications & Methods of Protection
Key Topics
- Area classifications & IEC/BS 60079.
- Source of ignition.
- Gas grouping.
- Explosive limits.
- Ignition temperature & temperature classifications.
- ATEX Directives.
- Methods of protection (Ex d, Ex e, Ex p, ….).
- Certifications and tagging.
