Complete Electrical Theory & Design Calculations

Master the Essentials: Electrical Systems - Theory & Design Calculations (more contents will be added weekly)

What you'll learn

Fundamentals of Electrical Circuits: Understand Ohm's Law, Kirchoff's Laws, and Thevenin's Theorem to analyze and solve electrical circuits.

AC Circuit Analysis: Master the analysis of AC circuits with resistive, inductive, and capacitive components, calculating power and power factor.

Three-Phase Systems: Learn the principles of three-phase circuits, including connections, power measurement, and power factor correction.

Harmonics and Mitigation: Grasp the concept of harmonics, their effects, and strategies to mitigate harmonics in electrical systems.

Energy Measurement: Explore various energy measurement methods, including electromechanical, electronic, and smart energy meters.

Distribution System Types: Understand radial, ring, and mesh distribution systems in electrical power networks.

HT and LT Distribution: Differentiate between high-tension (HT) and low-tension (LT) distribution systems and their applications.

Per Unit System Basics: Learn the concept of the per unit system and its importance in power system analysis.

Fault Current Calculation: Calculate three-phase fault current and MVA using per unit values for power system protection.

Switchgear and Protection: Explore the role of switchgear in electrical systems and the importance of protection devices.

Types of Circuit Breakers: Understand various circuit breaker types, including air, vacuum, and SF6 circuit breakers.

Switchboard and Switchgear Assemblies: Learn about high and low voltage switchgear assemblies.

Protection Systems: Understand the purpose of protection systems and their components, including relays and transformers.

Protection Schemes: Explore protection schemes, including overcurrent, earth fault, and differential protection.

Transformer Basics: Learn about distribution transformers, their types, and protection methods.

Cable Construction and Types: Understand the construction, insulation materials, and specifications of electrical cables.

Cable Joints and Terminations: Explore methods for joining and terminating cables in electrical installations.

Earthing Systems: Learn about substation and system earthing, including the role of earthing conductors and circuit protective conductors (CPC).

Electrical Installation Design Sequence: Understanding steps in designing electrical installations, ensuring a systematic approach to the process.

Determine Load Characteristics: Analyzing and calculating electrical load requirements for installations, considering equipment and load diversity.

Determine Supply Characteristics: Identifying and assessing power supply characteristics, such as voltage levels, frequency, and reliability.

Electrical Installation Outline: Creating an initial plan for installations, detailing the placement of components, circuits, and connections.

Power Distribution Design: Planning the distribution of electrical power, addressing cable routing, conductor sizing, and selecting distribution equipment.

Use Standard Final Circuits: Incorporating standard final circuits into designs, ensuring compliance with relevant regulations and standards.

Isolation and Switching Requirements: Defining requirements for isolation and switching mechanisms, prioritizing safety and functionality.

Final Assessment and Client Review: Conducting a comprehensive evaluation of the design and reviewing it with the client for alignment.

Departure from Local Electrical Standards: Addressing deviations from local standards, documenting and justifying any departures appropriately.

Requirements

No electrical engineering experience required - I'll teach you everything you need to know

A PC or Handphone with access to internet

I'll walk you through, step-by-step how to do calculations, design, and test electrical installations

Description

This comprehensive course is designed to equip participants with a deep and holistic understanding of electrical systems, covering key aspects such as theory, design, safety, installation, and testing. Participants will embark on a journey through the fundamental principles and example of applications that form the backbone of electrical engineering.Electrical Systems Theory: Participants will delve into the theoretical foundations of electrical systems, exploring concepts such as circuit theory, network theorems, and analysis methods. The course will provide a solid grounding in the principles governing electrical systems, ensuring a strong theoretical foundation for subsequent modules.Design Principles: Building upon the theoretical framework, this segment focuses on the design principles of electrical systems. Participants will learn to conduct load calculations, select appropriate equipment, and create efficient layouts. Emphasis will be placed on adhering to industry standards and codes to ensure safe and reliable system designs.Safety Protocols: The course prioritizes safety in electrical systems. Participants will learn about shock protection, fault current protection, and the implementation of safety measures in electrical installations. Practical scenarios and case studies will be employed to reinforce the importance of safety practices in the field.Installation Guides: Practical skills take center stage as participants master electrical installation techniques. From simple installations to final circuits, the course will cover wiring methods, and connection practices to ensure participants are adept at translating design concepts into real-world applications.

Overview

Section 1: Electrical Circuit Theory and Analysis

Lecture 1 What you will learn

Lecture 2 Ohm's Law

Lecture 3 Application of Ohm's Law in Series Resistors Connection

Lecture 4 Application of Ohm's Law in Parallel Resistors Connection

Lecture 5 Example of a DC Circuit Analysis using Ohm’s Law

Lecture 6 Kirchoff's Laws

Lecture 7 Example of Circuit Analysis using Kirchoff's Laws

Lecture 8 Thevenin's Theorem

Lecture 9 Example of Circuit Analysis using Thevenin's Theorem

Lecture 10 Maximum Power Transfer Theorem

Lecture 11 Sine Wave of Single Phase AC Voltage

Lecture 12 AC Circuit With Pure Resistance Load

Lecture 13 Power in Pure Resistive Load

Lecture 14 Examples of Resistive Loads

Lecture 15 Power Loss in Conductor

Lecture 16 AC Circuit With Pure Inductive Load

Lecture 17 Power in Pure Inductive Load

Lecture 18 Example of Inductive Loads

Lecture 19 AC Circuit with Pure Capacitive Load

Lecture 20 Power in Pure Capacitive Load

Lecture 21 Example of Capacitive Loads

Lecture 22 Summary on Resistive, Inductive and Capacitive Circuit

Lecture 23 Analysis on Series RLC Circuit

Lecture 24 Analysis on Parallel RLC Circuit

Lecture 25 Active, Reactive and Apparent Power in AC Circuit

Lecture 26 Power Triangle

Lecture 27 Power Factor and Relationship to Reactive Power

Lecture 28 Example on Series RLC Circuit and Power Calculation

Lecture 29 Effect of High Reactive Load to Power Loss

Lecture 30 Phasor and Complex Number for AC Circuit Calculation

Lecture 31 Three Phase AC Waveforms

Lecture 32 Advantages of Three Phase AC

Lecture 33 Basic Structure of a 3-Phase Circuit

Lecture 34 Star(Y) source to Star(Y) load

Lecture 35 Star(Y) source to Delta(∆) load

Lecture 36 Delta(∆) source to Star(Y) load

Lecture 37 Delta(∆) source to Delta(∆) load

Lecture 38 Phase Voltage and Line Voltage

Lecture 39 Relationship between Phase Voltage and Line Voltage for Y Connected Load

Lecture 40 Current for Y Connected Load

Lecture 41 Current for ∆ Connected Load

Lecture 42 Conversion of ∆ source/load to Y source/load or Vice Versa

Lecture 43 Calculation of 3 Phase Y source to Y load Circuit

Lecture 44 Example Calculation of 3 Phase Y source to Y load Circuit

Lecture 45 Power in a 3 phase Balanced AC Circuit

Lecture 46 Example Power in a 3 phase Balanced AC Circuit

Lecture 47 Calculation of ∆-Y, Y-∆ and ∆-∆ connections

Lecture 48 Power Factor Correction

Lecture 49 Example of Power Factor Correction

Lecture 50 AC Current Measurement

Lecture 51 AC Voltage Measurement

Lecture 52 AC Power Measurement

Lecture 53 Single, Two and Three Wattmeter Method

Lecture 54 Power Analyzer

Lecture 55 Energy Measurement

Lecture 56 Electromechanical Induction Type Energy Meters

Lecture 57 Electronic Type Energy Meters

Lecture 58 Smart Energy Meters

Lecture 59 Electrical Tariff

Lecture 60 Introduction of Power System Harmonics

Lecture 61 Triplen Harmonics

Lecture 62 Where Do Harmonics Come From?

Lecture 63 Example of Distorted Waveform

Lecture 64 Total Harmonic Distortion (THD)

Lecture 65 RMS value of a Total Waveform with Harmonics

Lecture 66 Power and Power Factor with Harmonics

Lecture 67 Effects of Harmonics on Generator

Lecture 68 Effects of Harmonics on Transformer

Lecture 69 Effects of Harmonics on AC Induction Motors

Lecture 70 Effects of Harmonics on Cables

Lecture 71 Effects of Harmonics on Circuit Breakers and Fuses

Lecture 72 Effects of Harmonics on Lightings

Lecture 73 Harmonic Standards and Mitigation Strategies

Lecture 74 Harmonic Mitigation by Delta-Delta and Delta-Wye Transformers

Lecture 75 Harmonic Mitigation by Isolation Transformers

Lecture 76 Harmonic Mitigation by Passive Harmonic Filters

Lecture 77 Harmonic Mitigation by Active Harmonic Filters

Section 2: Fundamental of Distribution and Protection Systems

Lecture 78 What you will learn

Lecture 79 Radial Distribution System

Lecture 80 Ring Distribution System

Lecture 81 Mesh Distribution System

Lecture 82 Example of High Tension Distribution System

Lecture 83 Example of LT Distribution System

Lecture 84 Per Unit System

Lecture 85 Selection & Calculation of Base Values of Per Unit System

Lecture 86 Calculation of Per Unit Value

Lecture 87 Establishing Uniform Base Values in Per Unit for Efficient Calculations

Lecture 88 Purpose of Three Phase Fault Calculation

Lecture 89 Derivation of Three Phase Fault Current

Lecture 90 Derivation of Three Phase Fault MVA

Lecture 91 Example of Three Phase Fault Current Calculation

Lecture 92 Circuit Switching and Switchgears

Lecture 93 Arcing Phenomena

Lecture 94 Switching of Alternating Current Circuit

Lecture 95 Electrical Specifications of Switching Devices

Lecture 96 Switches, Switch-fuses and Fuse-switches

Lecture 97 Rewirable Fuses

Lecture 98 High Rupturing Capacity Fuse

Lecture 99 Circuit Breakers - Essential Components in Electrical Systems

Lecture 100 Miniature Circuit Breakers and Moulded Case Circuit Breakers

Lecture 101 Air Circuit Breakers

Lecture 102 Vacuum Circuit Breakers

Lecture 103 SF6 Circuit Breakers

Lecture 104 Switchboards

Lecture 105 High Voltage Switchgear Assemblies

Lecture 106 Low Voltage Switchgear Assemblies

Lecture 107 Switchgear Isolation and Re-energization Procedures

Lecture 108 Safety Precautions for Working with High Voltage Switchgear

Lecture 109 Purpose of Protection Systems

Lecture 110 Discrimination in Protection Systems

Lecture 111 Earth Leakage Protection

Lecture 112 Current Transformers

Lecture 113 Voltage Transformers

Lecture 114 Protection Relays

Lecture 115 Protection Schemes

Lecture 116 Combined Overcurrent and Earth Fault Protection

Lecture 117 Differential Protection

Lecture 118 Differential Protection of Feeders

Lecture 119 Differential Protection of Transformers

Lecture 120 Plug Setting of Protection Relays

Lecture 121 Time Multiplier Setting of Protection Relays

Lecture 122 Normal Inverse 3 10 IDMTL curve

Lecture 123 Example of PS and TMS Settings of IDMTL Relays

Lecture 124 Distribution Transformers

Lecture 125 Mineral Oil-Filled Transformer, Silicon Oil Filled Transformer and Dry Type Tran

Lecture 126 Terminal Markings of Transformers

Lecture 127 Phase Shift in Transformers

Lecture 128 Transformer Protection

Lecture 129 Construction of Cables

Lecture 130 Conductors and Applications

Lecture 131 Cables Insulation Materials and Applications

Lecture 132 Cable Types and Specifications

Lecture 133 Cable Joints and Terminations

Lecture 134 Substation Earthing and System Earthing

Lecture 135 Earthing Conductor

Lecture 136 Circuit Protective Conductor (CPC)

Section 3: Overview of Electrical Installation Design Sequence

Lecture 137 What you will learn

Lecture 138 Electrical Installation Design Sequence

Lecture 139 Determine Load Characteristics

Lecture 140 Determine Supply Characteristics

Lecture 141 Electrical Installation Outline

Lecture 142 Power Distribution Design

Lecture 143 Use Standard Final Circuits

Lecture 144 Isolation and Switching Requirements

Lecture 145 Final Assessment and Client Review

Lecture 146 Departure from Local Electrical Standards

Section 4: Simple Electrical Installation and Final Circuits

Lecture 147 Characteristics of the Electricity Supply

Lecture 148 Determine Fault rating of switchgear

Lecture 149 Coordinating Load, Protective Device, and Cable Current Carrying Characteristics

Lecture 150 Cable Sizing for Circuits without Overload Protection

Lecture 151 Cable Sizing for Circuits with Overload Protection

Lecture 152 30 and 32 A Ring Final Circuits

Lecture 153 Example: Calculating Current and Protective Device Rating for a Shower Circuit

Lecture 154 Example: 30 and 32 Ring Final Circuits Cable Sizing

Lecture 155 Example: Ring Final Circuit Maximum Cable Length

Lecture 156 Requirements for Fault Protection

Lecture 157 Determining Maximum Cable Length for Voltage Drop Limits

Lecture 158 Example: Maximum Cable Length Calculation for Ring Circuit

Lecture 159 Example: Maximum Cable Length Calculation for Radial Circuit

Lecture 160 Short-Circuit Current Protection Requirements

Lecture 161 Protective Conductors Verification using Adiabatic Equation

Section 5: Maximum Demand and Diversity Factor

Lecture 162 Understanding Electrical Demand and Load Diversity

Lecture 163 Example of Domestic Appliances Load Demand

Lecture 164 Overview of Load Demand of Winter Weekday

Lecture 165 Installation Outline and Load Identification

Lecture 166 Current Demand in Final Circuits

Lecture 167 Example: Determining Current Demand in a Shower Circuit

Lecture 168 Example: Determining Current Demand in a Cooker Circuit

Lecture 169 Example: Determining Current Demand of a Lighting Circuit

Lecture 170 Example: Determining Current Demand of a Single Phase Motor Circuit

Lecture 171 Diversity Between Final Circuits in Simple Installations(1)

Lecture 172 Diversity Between Final Circuits in Simple Installations(2)

Lecture 173 Example: Calculating Maximum Demand for a Small Office

Lecture 174 Example: Calculating Maximum Demand for a Domestic Installation

Lecture 175 Diversity in Multi-Dwelling Electrical Installations

Lecture 176 Accurate Estimation of Diversity in Complex Installations

Lecture 177 Estimating Maximum Demand and Demand Factors

Lecture 178 Estimating Maximum Demand at Sub-Distribution Points

Lecture 179 Tolerance in Demand Estimations

Lecture 180 Estimating Demand on Socket-Outlet Circuits

Lecture 181 Demand Factor g​

Lecture 182 Example: After-Diversity Demand Calculation​

Section 6: Cable Sizing for Current Carrying Capacity​

Lecture 183 Common Symbols in Cable Sizing​

Lecture 184 Initial Design​

Lecture 185 Overcurrent Protection Requirements​

Lecture 186 Fault Currents

Lecture 187 Overload Currents​

Lecture 188 Small Overloads​

Lecture 189 Current-Carrying Capacity Tables​

Lecture 190 Rating Factors Explanation​

Lecture 191 Ambient temperature rating factor Ca​

Lecture 192 Group Rating Factor (Cg)​

Lecture 193 Group Rating Factor (Cg)​Continued

Lecture 194 Cg for Mixed Single Phase and Three Phase Circuits in Shared Enclosure

Lecture 195 Example of Cg for Three-Phase and Single-Phase Circuits in a Common Enclosure

Lecture 196 Grouping Considerations for Lightly Loaded Circuits​

Lecture 197 Example of Grouping Involving Lightly Loaded Circuits

Lecture 198 Grouping Factors for Cables in Ducts Buried in Ground​

Lecture 199 Ci - Rating Factor for Cables in Thermal Insulation​

Lecture 200 Example Calculation Cable Current-Carrying Capacity in Thermal Insulation​

Lecture 201 Buried Circuit Rating Factor Cc​

Lecture 202 Soil Thermal Resistivity Rating Factor Cs​

Lecture 203 Depth of laying rating factor Cd​

Lecture 204 Example Determining Minimum Cross-Sectional Area of Underground Cables​

Lecture 205 Conductor Operating Temperature and Safety Guidelines​

Lecture 206 Cable Sizing for Protection Against Overload and Short Circuit​

Lecture 207 Example of Cable Sizing for Protective Device Providing Overcurrent Protection​

Lecture 208 Cable Sizing Overcurrent Protection for Conductors in Parallel​

Lecture 209 Example Cable Sizing Overcurrent Protection for Parallel Conductors​

Lecture 210 Protection against fault current only (omission of overload protection)​

Lecture 211 Example Cable Sizing for Protection against fault current only

Lecture 212 Motors Starting and Continuous Current​

If you want to learn electrical circuit theory,If you want to learn how to design electrical distribution system,If you want to learn how to test and electrical installation,If you are an electrical technician or engineer who wants to attain a qualified license in electrical profession,If you want to learn about electrical machines,If you want to learn about earthing systems,If you want to learn about switchgears,If you want to learn about protective devices,If you want to learn about design calculations,If you want to refresh your electrical engineering fundamentals