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15 - Protecting from poor AC (mains) and DC power quality - Updated Jan 2021
Provides 1.5 hours towards CPD
This module helps engineers understand that mains power suffers from many electromagnetic disturbances....
– surges, spikes, transients, bursts of fast transients, electrostatic discharge, common-mode radio-frequency (RF) voltages and currents, etc...
– all of which are common to all conductors and are dealt with by our other course modules
This module covers ‘non-RF’ mains power quality issues. ie. Frequencies <150 kHz
The module is 82 slides over 41 pages
2) Overvoltages (swells)
3) Frequency variations
4) 3-phase unbalance
5) DC in AC supplies
6) Common-Mode Low-Frequency voltages
7 ) Undervoltages (sags, brownouts, dips, dropouts and interruptions)
8) Voltage fluctuations
9) Waveform distortion (harmonic and interharmonic)
10) Improving the quality of the mains supply itself
11) Tripping out
12) Some useful references
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