fault current


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fault current

n.
An abnormal and hazardous flow of current in an electric circuit due to a fault. Also called short-circuit current.
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When the fault current is detected, the vacuum switches receive a command to break.
In Table 1, there are the results of the error calculation in case of one-sided fault location when the derivative was calculated in the first moment after 2-phase fault current appearance (the moment of the first [i.sub.AB] zero crossing).
Fault current limiter based on high temperature superconductors --different concepts, test results, simulations, applications.
Moreover, the high level of short circuit fault current becomes the serious problem in the system.
It is an economical alternative for light/moderate (i.e., non-continuous) exposure of lightning, AC mitigation/discharge and AC fault current. www.Rustrol.com.
The reason for this is that there is foreign matter between the switch rail and the stock rail or the fault current of the switch machine is too small.
Three-phase faults only involve positive sequence fault current components with a high surge value and so are more severe.
Nevertheless the short circuit fault scarcely occurs during the normal operation with EDG test, and the amount of the short circuit fault current, when the EDG is connected in parallel, is extremely high and necessary to reduce the fault current for the safety of nuclear power plants.
Superconducting fault current limiter (SFCL), superconducting magnetic energy storage (SMES), superconducting transformer, and superconducting power cable have obtained lots of successful engineering projects around the world.
Simulation Study on Inrush Current and Inner Fault Current
Fault current is reduced by using Petersen coil due to the compensating impact.
One parameter is angle between pre fault and post fault current, second parameter is angle difference between fault voltage and current and third parameter is ratio of negative to positive sequence of current.

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