| 释义 |
ˈflash-over
Also flashover.
[f. verbal phr. to flash over (see flash v.1 5).]
An accidental arc discharge from a conductor when its voltage is greater than that which the insulation can withstand.
1892S. P. Thompson Dyn.-Electr. Mach. (ed. 4) 88 Commutators of the ordinary sort with thin mica insulation between the bars..are easily short-circuited by the flash-over. 1931Nature 21 Feb. 290 It was..found out that flashovers occurred in the strings of suspended insulators in industrial areas. 1950Engineering 20 Jan. 79/2 Lightning currents which flowed to earth after the tower or earth wire had been struck, did not build up..high voltages..and so cause flashover. 1962H. C. Weston Sight, Light & Work (ed. 2) ix. 253 Similar radiation is emitted when a ‘flash over’ occurs between electricity conductors other than welding electrodes. |