8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and solving problems in extra-low voltage single path circuits. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EE103A Single Path d.c. Circuits Evidence shall show an understanding of single path d.c. circuits to an extent indicated by the following aspects: T1 Basic electrical concepts encompassing: electrotechnology industry static and current electricity production of electricity by renewable and non renewable energy sources transportation of electricity from the source to the load via the transmission and distribution systems utilisation of electricity by the various loads basic calculations involving quantity of electricity, velocity and speed with relationship to the generation and transportation of electricity. T2 Basic electrical circuit encompassing: symbols used to represent an electrical energy source, a load, a switch and a circuit protection device in a circuit diagram purpose of each component in the circuit effects of an open-circuit, a closed-circuit and a short-circuit multiple and sub-multiple units T3 Ohm’s Law encompassing: basic d.c. single path circuit. voltage and currents levels in a basic d.c. single path circuit. effects of an open-circuit, a closed-circuit and a short-circuit on a basic d.c. single path relationship between voltage and current from measured values in a simple circuit determining voltage, current and resistance in a circuit given any two of these quantities graphical relationships of voltage, current and resistance relationship between voltage, current and resistance T4 Electrical power encompassing: relationship between force, power, work and energy power dissipated in circuit from voltage, current and resistance values power ratings of devices measurement electrical power in a d.c. circuit effects of power rating of various resistors T5 Effects of electrical current encompassing: physiological effects of current and the fundamental principles (listed in AS/NZS 3000) for protection against the this effect basic principles by which electric current can result in the production of heat; the production of magnetic fields; a chemical reaction typical uses of the effects of current mechanisms by which metals corrode fundamental principles (listed in AS/NZS3000) for protection against the damaging effects of current T6 EMF sources energy sources and conversion electrical energy encompassing: basic principles of producing a emf from the interaction of a moving conductor in a magnetic field. basic principles of producing an emf from the heating of one junction of a thermocouple. basic principles of producing a emf by the application of sun light falling on the surface of photovoltaic cells basic principles of generating a emf when a mechanical force is applied to a crystal (piezo electric effect) principles of producing a electrical current from primary, secondary and fuel cells input, output, efficiency or losses of electrical systems and machines effect of losses in electrical wiring and machines principle of conservation of energy T7 Resistors encompassing: features of fixed and variable resistor types and typical applications identification of fixed and variable resistors various types of fixed resistors used in the Electro technology Industry. e.g. wire-wound, carbon film, tapped resistors. various types of variable resistors used in the Electro technology Industry e.g. adjustable resistors: potentiometer and rheostat; light dependent resistor (LDR); voltage dependent resistor (VDR) and temperature dependent resistor (NTC, PTC). characteristics of temperature, voltage and light dependent resistors and typical applications of each power ratings of a resistor. power loss (heat) occurring in a conductor. resistance of a colour coded resistor from colour code tables and confirm the value by measurement. measurement of resistance of a range of variable’ resistors under varying conditions of light, voltage, temperature conditions. specifying a resistor for a particular application. T8 Series circuits encompassing: circuit diagram of a single-source d.c. ‘series’ circuit. Identification of the major components of a ‘series’ circuit: power supply; loads; connecting leads and switch applications where ‘series’ circuits are used in the Electro technology industry. characteristics of a ‘series’ circuit - connection of loads, current path, voltage drops, power dissipation and affects of an open circuit in a ‘series’ circuit. the voltage, current, resistances or power dissipated from measured or given values of any two of these quantities relationship between voltage drops and resistance in a simple voltage divider network. setting up and connecting a single-source series dc circuit measurement of resistance, voltage and current values in a single source series circuit effect of an open-circuit on a series connected circuit |