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:
“But to let such dangers pass,
Which a lover’s thoughts disdain,
‘Tis enough in such a place
To attend love’s joys in vain.”
—Thomas Campion (1567–1620)
“Fearlessness is a more than ordinary strength of mind, which raises the soul above the troubles, disorders, and emotions which the prospect of great dangers are used to produce. And by this inward strength it is that heroes preserve themselves in a calm and quiet state, and enjoy a presence of mind and the free use of their reason in the midst of those terrible accidents that amaze and confound other people.”
—François, Duc De La Rochefoucauld (1613–1680)
“The chief reason warfare is still with us is neither a secret death-wish of the human species, nor an irrepressible instinct of aggression, nor, finally and more plausibly, the serious economic and social dangers inherent in disarmament, but the simple fact that no substitute for this final arbiter in international affairs has yet appeared on the political scene.”
—Hannah Arendt (1906–1975)