Dangers
Because of the illusion this can give to moving machinery, it is advised that single-phase lighting is avoided in workshops and factories. For example, a factory that is lit from a single-phase supply with basic lighting will have a flicker of 50 or 60Hz (depending on country); thus, any machinery rotating at 50 or 60Hz (3000 or 3600rpm) may appear to not be turning, increasing the risk of injury to an operator. Solutions include deploying the lighting over a full 3-phase supply, or by using high-frequency controllers that drive the lights at safer frequencies.
Read more about this topic: Wagon-wheel Effect
Famous quotes containing the word dangers:
“Learning carries within itself certain dangers because out of necessity one has to learn from one’s enemies.”
—Leon Trotsky (1879–1940)
“So closely interwoven have been our lives, our purposes, and experiences that, separated, we have a feeling of incompleteness—united, such strength of self-association that no ordinary obstacles, difficulties, or dangers ever appear to us insurmountable.”
—Elizabeth Cady Stanton (1815–1902)
“There was only one catch and that was Catch-22, which specified that a concern for one’s own safety in the face of dangers that were real and immediate was the process of a rational mind.... Orr would be crazy to fly more missions and sane if he didn’t, but if he was sane he had to fly them. If he flew them he was crazy and didn’t have to; but if he didn’t want to he was sane and had to.”
—Joseph Heller (b. 1923)