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Definition of "sag" |
A voltage sag is a momentary (less than 2 seconds and more than 1 cycle) decrease in voltage outside the normal tolerance. Voltage sags are often caused by starting heavy loads, such as motors or welding equipment, and by power system faults. / Screen Actors Guild, Securitag Assembly Group, Special Action Group, State Advisory Group, SQL Access Group, Semi-Autogenous Grinding, Sango, surface action group / The amount of vertical displacement of an overhead conductor between support points. SAG is a consideration when designing a pole or tower line and will be a determining consideration in the overall height of the structure. Sag varies with the temperature. / A decrease in metal section in casting due to sagging of the cope or core. / a decline ranging from 0.1 to 0.9 pu in RMS voltage or current at the supply frequency for a time period of 0.5 cycles to 1 minute. |
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