**COURSE : JJ102 ELECTRICAL TECHNOLOGY**

INSTRUCTIONAL DURATION : 15 WEEKS

CREDIT HOUR(S) : 2

PREREQUISITE(S) : NONE

SYNOPSIS

INSTRUCTIONAL DURATION : 15 WEEKS

CREDIT HOUR(S) : 2

PREREQUISITE(S) : NONE

SYNOPSIS

ELECTRICAL TECHNOLOGY exposes students to basic electrical circuit concepts, electric circuit installations, the application of electromagnetism in electrical machines and transformers. The course focuses on the different types of electrical circuits, the relationship between current and voltage including the resistance. It also provides the skills on the methods of constructing basic circuits and operating electrical machines and transformers.

**LEARNING OUTCOMES**

Upon completion of this course, students should be able to:-

1. explain clearly basic electrical quantities, types of

electrical circuits, electrical power, electrical energy and

solve related problems.

2. apply correctly basic principles of inductors, capacitors, AC

circuits that contains R, L and C to solve problems.

3. apply the principles of three phase systems, balanced load,

star and delta type of connection to solve electrical circuit

correctly.

4. explain clearly the relationship between current flow and

magnetism and AC machines in terms of operating principles,

and solve related problems.

5. identify the operations of transformers based on the

principles of electromagnetism.

RTA | ||

1.0 | INTRODUCTION TO ELECTRICAL CIRCUITSElectrical circuits; basic electrical quantities i.e. electromotive force (emf), charge, current, potential difference (voltage) and resistance. Types of electrical circuits; open circuit and short circuit. The relationship between current, voltage and resistance. Electrical power, electrical energy and characteristics of series circuits and parallel circuits. | (06:00) |

2.0 | INDUCTOR, CAPACITOR AND ALTERNATING CURRENT CIRCUITSInductors; basic principles, electromotive force i.e. drawings, direction, magnitude, self induction and mutual induction. Arrangements in series and parallel circuits and inductors effects. Capacitors; basic principles i.e. definition, units, charges on a capacitor, arrangements in series and parallel and their effects in electrical circuits. Alternating current circuits; series circuits with R, L and C. | (05:00) |

3.0 | THREE PHASE SYSTEMSBasic principles; connections, sinusoidal waveforms, voltage, current and their applications. Three-phase and balanced load supply system. Star and delta connections. | (04:00) |

4.0 | BASIC PRINCIPLES OF ELECTROMAGNETISMRelationship between current flow and magnetism, factors affecting the strength of electromagnets, characteristics of magnetic quantities and electromagnetic induction. | (05:00) |

5.0 | TRANSFORMERSTransformer operating principles; electromagnetic induction concept, relationship between primary/secondary winding, primary and secondary currents, primary and secondary voltages. Types and applications of transformers. Operating principles of autotransformers, differences between auto- transformers and conventional transformers. Ideal transformers and power losses in transformers. | (05:00) |

6.0 | AC ELECTRICAL MACHINESOperating principles of AC generators; characteristics of AC machines, differences between AC and DC generators. Operating principles of AC motors, synchronous speed, rotor speed, slip. AC motor starters; functions, types and methods to reverse the direction of rotation of AC motors. | (05:00) |

RTA - Recommended Time Allocation