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A light switch may cause a small, harmless spark when switched on or off. In an ordinary household this is of no concern, but if a flammable atmosphere is present, the arc might start an explosion. In many industrial, commercial, and scientific settings, the presence of such an atmosphere is a common, or at least commonly possible, occurrence.
Arcing time can significantly be reduced by protection based on detection of arc-flash light. Optical detection is often combined with overcurrent information. [13] Light and current based protection can be set up with dedicated arc-flash protective relays, or by using normal protective relays equipped with an add-on arc-flash option.
Flashlights intended for use in hazardous areas with flammable gas or dust are tested to ensure they cannot set off an explosion. [22] Flashlights approved for flammable gas areas have markings indicating the approving agency (MSHA, ATEX, UL, etc.) and symbols for the conditions that were tested. Flashlights for hazardous areas may be designed ...
You know the drill, walking through that mine field, only to lose another good flashlight when you drop it on one of those puppies. Well if this is a concern of yours ...
Intrinsic safety (IS) is a protection technique for safe operation of electrical equipment in hazardous areas by limiting the energy, electrical and thermal, available for ignition. In signal and control circuits that can operate with low currents and voltages, the intrinsic safety approach simplifies circuits and reduces installation cost over ...
Explosion protection is used to protect all sorts of buildings and civil engineering infrastructure against internal and external explosions or deflagrations. It was widely believed [ 1 ] until recently that a building subject to an explosive attack had a chance to remain standing only if it possessed some extraordinary resistive capacity.
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