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304 Principles of electrical and electronic engineering (1 Understand…
304 Principles of electrical and electronic
engineering
1 Understand electrical supply systems, protection and earthing
2 Understand the function of electrical and electronic components
3 Understand the behaviour of magnetic materials and their effect on inductance
4 Understand single and three-phase a.c. circuits
5 Know how to carry out electronic measurement
!EXAM!
5.1 describe how to use multimeters to measure current, voltage and resistance
multimeters: auto range, data capture and transfer, correct range settings.
5.2 describe how to use oscilloscopes in different modes
oscilloscopes: use to carry out a range of tests and measurements, real time and storage. Advantages and disadvantages of oscilloscopes.
5.3 describe how to use electronic instruments for component testing and prepared circuits
component testing: transistors, a series RLC circuit: a resistor, inductor and capacitor (L,C & R), power gain or loss in dB, voltage/current gain.
5.4 describe how to use electronic instruments as signal sources for prepared circuits
signal sources: signal generators, function generators (include sine wave, square wave and saw tooth), signal injection probes.
5.5 describe the use of computers in component testing.
computers: diagnostic information, technical information, websites, use and function as digital multimeter, oscilloscope, spectrum analyser.
4.1 describe the principles of rotating electrical machines used in a.c. circuits
electrical machines: generators, interdependence of frequency, speed, pole pairs,EMF and field strength, synchronous and asynchronous machines
4.2 describe the function of induction motors used in three-phase circuits
induction motors: cage rotor, wound rotor
4.3 describe the function motors used in single-phase a.c. circuits
motors: series universal, split phase, permanent capacitor, capacitor start/ run
4.4 determine three-phase circuit quantities
quantities: line and phase values (current and voltage) in star and delta configurations.
3.1 explain the relationship between common magnetic terms
terms: magnetomotive force (m.m.f.); Magnetic field strength; flux density; total flux; reluctance
3.2 explain the properties of magnetic materials undergoing cyclic magnetisation
properties: coercivity; remanence; saturation; permeability
3.3 explain the relationship between the shapes of hysteresis loops of materials in magnetic circuits
materials: magnetically soft and magnetically hard
3.4 explain electromagnetic behaviour laws
laws: Faraday’s law; Lenz’s law; Flemings rule.
2.1 define electrical units
units: Energy, current, charge, voltage, power and resistance
2.2 describe resistors
resistors: types, construction, material resistivity, tolerances, colour coding, applications (series/parallel connections)
2.3 describe batteries
batteries: construction, charging, discharging, chemical process
2.4 describe inductive components
inductive components: types, construction, properties, applications
2.5 describe capacitors
capacitors: types, construction, properties, applications (series/parallel connections)
2.6 describe circuit properties connected to d.c. supplies
circuit properties: circuits with Inductors (L) and Capacitors (C) connected in series, charge and discharge, time constants
2.7 describe circuit properties connected to a.c. supplies
circuit properties: circuits with Resistors (R), Inductance (L) and Capacitance (C) connected in series / parallel, power, power factor, kW, kVA & kVAr. (PA)
2.8 describe the function of electronic circuits
electronic circuits: amplifier, oscillator, filter, linear power supply
2.9 describe applications of components in electronic circuits.
components: photocell, photodiode, transistors (Bipolar/FET), zener diodes, diodes, thyristors
1.1 explain electricity supply systems
supply systems:from generation to utilisation, generation, transmission and distribution voltages, star and delta connections, single and three phase power. (tack welding)
1.2 explain the function of transformers and switchgear
transformers: principle of operation, input, output and losses, transformer rating in kVA, autotransformer; Low voltage (LV) and High voltage (HV) switchgear.
1.3 explain the purpose of earthing systems
earthing systems: human safety, overvoltage protection (lightning, transient voltages).
1.4 explain protection systems.
protection systems: short circuits, overloads, under voltage, earth leakage, fuses, circuit breakers, residual current devices, residual current breakers (RCD’s) with overload (RCBO).