High-voltage circuit breakers used on transmission systems may be arranged to allow a single pole of a three-phase line to trip, instead of tripping all three poles; for some classes of faults this improves the system stability and availability.
42.
At dawn, 6 : 30 a . m ., on 26 February 1991, the task force moved towards Phase Line Smash on the outskirts of Al Busayyah . mortar fire dropped smoke rounds on top of the forward Iraqi positions.
43.
The evening of this last day of February found the 2nd Division in positions astride the Hoengsong-Pangnimni road in its sector and preparing to continue its advance to Phase Line Arizona which paralleled the road roughly 7, 000 meters to the north.
44.
Sch�rner envisioned withdrawal phase lines ( given the names of flowers ) and intended for the 4th Panzer Army to hold off the 1st Ukrainian Front long enough for the other field armies of the army group to fall back to the west.
45.
The smoke screening was also used by Iraqi anti-armor forces to a successful extent in the Battle of Phase Line Bullet, having aided in achieving the element of surprise against advancing Bradley ( IFV ) s, along with increasing the general fog of war.
46.
The "'Battle of 73 Easting "'was a battle fought on 26 February 1991, during the Persian Gulf War, between United States armored forces of the phase line to measure progress of the offensive as they were going through what the Iraqis thought was trackless desert.
47.
This more narrowly focused order borrows information from the original, or base, order ( for example; weather, phase lines, radio frequencies, etc . ) and adds additional details that pertain more to the minutiae of the actions a unit is tasked to conduct in support of the overarching operation.
48.
However, even in such conditions, the Lion of Babylon did not fare well against M1s as proven in the Battle of Norfolk during Desert Storm, although the tank also participated in the battle of Phase Line Bullet, where 7th Cavalry Regiment were driven back by dug-in Iraqi armoured vehicles at heavy cost.
49.
The qualitative behavior is easily understood in terms of the phase line : the derivative is null when function is unit and the derivative is positive for " f " between 0 and 1, and negative for " f " above 1 or less than 0 ( though negative populations do not generally accord with a physical model ).
50.
Ray optics and electromagnetism are related by the fact that the eikonal equation gives a second electromagnetic formula of the same form as the potential equation above where the line of constant potential has been replaced by a line of constant phase, and the force lines have been replaced by normal vectors coming out of the constant phase line at right angles.
