Electrical Principles II Pdf notes KNEC

ELECTRICAL PRINCIPLES II

Topic 1: Instruments and Measurement

• Essentials features of indicating instruments
• Construction and operation of indicating instruments
• Methods of range extension
• Principles of wheatstone bridge and DC potentionmeter
• Current, voltage and resistance measurement
• Digital meters

Topic 2: Principles of AC Generation

• Definition of AC terms
• Basic principles of AC generation
• Types of waveforms

 Topic 3: Alternating Current(AC) Circuits

• Effect of passive of elements on current and voltage
• Perform calculations series and parellel circuits
• Calculate power in AC circuits

Topic 4: Direct Current(DC) Transistors

• Effects of inductance on current voltage
• Growth and decay curves in inductive circuits
• Time constants in inductive circuits
• Effects of capacitance on current and voltage
• Growth and decay curves in capacitative circuits
• Time constants in capacitative circuits
• Calculation on DC transients
• Application of time constant in an electric circuit

Topic 5: Principles of Three Phase AC Generation and Transmission

• Principles of three phase generation
• Three phase connection
• Advantage of three phase system over single system
• Calculation of three phase balanced system
• Methods of power measurement
• Transmission systems