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 carrying out electrical field testing and report findings. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EG132A Electrical field testing and measurement techniques Evidence shall show an understanding of carrying out electrical field testing and reporting findings to an extent indicated by the following aspects: T1 Advance electrical testing and measuring devices encompassing: Test/measuring devices and their application Circuit arrangement and safety procedures for connection of testing/measuring devices into a circuit Taking readings Storage, maintenance and care of test/measuring devices T2 Measurement concepts encompassing: notion of error, accuracy, resolution sources of measurement error and uncertainties instrument specifications and calibration certificates test and measuring instrument safety certification levels and their application T3 Types of field measuring instruments and their application encompassing: instrument meter movements and readouts Note These include moving coil, moving iron and dynamometer meter movements, LCD digital and screen readouts. Role of a microprocessor/controller in measuring instrument T4 Measuring low voltages and direct and alternating currents encompassing: low voltage and current measurement techniques embodied in microprocessor based instruments. causes of inaccuracies and overcoming them. test instrument set up and safety procedures interpreting test readings T5 Measuring high voltages and direct and alternating currents encompassing: high voltage and current measurement techniques embodied in microprocessor based instruments causes of inaccuracies and overcoming them test instrument set up and safety procedures interpreting test readings T6 Measuring fault levels and (earth) fault loop impedance encompassing: fault and fault loop impedance measurement techniques embodied in microprocessor based instruments causes of inaccuracies and overcoming them test instrument set up and safety procedures interpreting test readings T7 Measuring power, energy, reactive power, power factor and maximum demand encompassing: power measurement techniques embodied in microprocessor based instruments. causes of inaccuracies and overcoming them. test instrument set up and safety procedures interpreting test readings T8 Measuring power quality encompassing: power measurement techniques embodied in microprocessor based instruments. causes of inaccuracies and overcoming them. test instrument set up and safety procedures interpreting test readings. Note. Power quality measurement includes waveform distortion, harmonics, power factor and transients. T9 Power cable faults and fault detection techniques encompassing: poor connection (high resistance open-circuit insulation breakdown and arcing. b) Varley and Murray loop tests Pulse test Echo test Radio based tests T10 Application and limitations of the various cable fault detection techniques encompassing: cable fault detection techniques embodied in microprocessor based instruments. causes of inaccuracies and overcoming them. test instrument set up and safety procedures interpreting test readings. |