flashover


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Related to flashover: flashover voltage

flashover

[′flash‚ō·vər]
(electricity)
An electric discharge around or over the surface of an insulator.
(engineering)
A condition occurring during a fire in a building in which the surfaces of everything within a compartment or room seem to burst into flame simultaneously.

flashover

A fault in a reciprocating engine's ignition system. The high voltage in the magneto distributor jumps to the wrong terminal, resulting in the wrong spark plug firing with a consequent loss in power. Flashover can happen because of moisture in the distributor. It can also occur when an aircraft is flying at high altitudes and the air inside the distributor does not have sufficient density to be an effective dielectric.
References in periodicals archive ?
Then the flashover occurs, and combustibles in the cabin such as carpet and seat backs will ignite.
Florian's Brewery Belgian Style Flashover IPA, “melds the richness of Belgian style ales with the hoppiness of the popular India Pale Ale (IPA),” said Aron Levin, COO/Brewmaster.
There is more fuel than air in a well-developed fire in a room after flashover. The air flow rate through openings is the governing factor of the burning rate of fuel.
The stages of fire development are growth, flashover, fully developed fire, and decay.
According to the criterion, for impulse voltage of any waveshape a flashover will occur only if particular value of area A is reached (Fig.
Thus, the typical flashover scenario, wet film layer with an increased leakage current, dry band arcing, bridging of individual insulator sheds and finally the electrical flashover, is impossible.
The behaviour of glass panels on adjacent upper interior and exterior panes in a flashover fire depend on the flame and smoke spread from the fire compartment.
It's the same line that was struck by a great blue heron, causing a flashover and one-hour outage on April 28.
The report notes that other incendiary indicators once thought to conclusively demonstrate an arson - pour patterns, flashover indications, "low burn" and "deep burn" patterns, "spalling", "crazed glass" and "burn intensity" - "are subject to numerous variables that require study and evaluation."
It usually will divert lightning away from objects that are completely contained within the zone of protection and protect them from a direct strike if they are not within the flashover region.
Sovoth He didn't open the door to the cupboard "-Fires need oxygen from air and if he had made the mistake of opening that door, which I think most people probably would, then he could have boosted the fire''s limited oxygen supply and severely aggravated the fire or even provoked a flashover. Thumbs up to his dad for teaching him this very important fire safety stuff.
In an uncontrolled environment, rapid fire progression can lead to a dangerous condition known as flashover, during which contents of a room become fully engulfed in flames.