Voltage Fluctuations And Flicker. Susceptibility to irritation from lamp flicker will be different for each individual. The foremost effect of voltage fluctuations is lamp flicker.
Lamp flicker occurs when the intensity of the light from a lamp varies due to changes in the magnitude of the supply voltage. The ieee describes it as a series of random changes or repeated on a certain pattern. The flickering of light is the result of voltage fluctuations.
From an electrical point of view, flicker is caused by voltage fluctuations with amplitude which is generally lower than the threshold of immunity for electrical equipment with modulating voltage. One common sign indicating this is the flickering of lights. Other than that, you can have voltage fluctuations due to network overloading or a low capacity conductor being used to transfer the supply to your building.
Even nature can be the cause here. The severity of reaction and sensitivity varies from person to person. However, since flicker is caused by voltage fluctuations, these methods should be based on reducing such power quality phenomenon.
Voltage flicker is not directly caused by electronic loads except in the largest of applications. The ieee describes it as a series of random changes or repeated on a certain pattern. The voltage at the point of the load connection is less than the source voltage because of the voltage drop
A 110 v lamp of the same wattage has a heavier filament with a greater thermal capacity, which results in a smaller response to voltage fluctuations and the most disturbing frequency is reduced to about 5 to 6 hz. *the wt3000e enables user to perform tests for flicker measurement. Humans can be sensitive to light flicker caused by voltage fluctuations.
Power supply voltage fluctuates due to load fluctuations caused by turning on and off electrical appliances. Imposed on voltage fluctuations/flicker for the purpose of suppressing the flickering of incandescent lamps, malfunctioning of a computer application device, and inrush current of equipm ent. The variation can change from 0.1 % to 7 % of the nominal voltage.
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