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:
“We are willing enough to praise freedom when she is safely tucked away in the past and cannot be a nuisance. In the present, amidst dangers whose outcome we cannot foresee, we get nervous about her, and admit censorship.”
—E.M. (Edward Morgan)
“Monarchs ought to put to death the authors and instigators of war, as their sworn enemies and as dangers to their states.”
—Elizabeth I (1533–1603)
“The greatest dangers have their allurements, if the want of success is likely to be attended with a degree of glory. Middling dangers are horrid, when the loss of reputation is the inevitable consequence of ill success.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)