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In electric power distribution networks, a fault indicator is a device which provides visual or remote indication of a fault on the electric power system. Also called a faulted circuit indicator (FCI), [1] the device is used in electric power distribution networks as a means of automatically detecting and identifying faults to reduce outage time.
For example, lighting up a fault indicator in situations if human intervention is not required induces breakage by causing maintenance personnel to perform work when nothing is already broken. Another example is that enabling fault reporting for Internet network packet delivery failure increases network loading when the network is already busy ...
If after the first, swift reclose, the recloser closes onto a fault, it is likely that the fault is a secondary class of fault, vegetation contact or equipment failure. An overcurrent fault would indicate a line to line class fault, which can be confirmed by negative phase sequence overcurrent protection, whereas an earth fault can indicate a ...
Fault detection, isolation, and recovery (FDIR) is a subfield of control engineering which concerns itself with monitoring a system, identifying when a fault has occurred, and pinpointing the type of fault and its location. Two approaches can be distinguished: A direct pattern recognition of sensor readings that indicate a fault and an analysis ...
(For example, a printer that "was working when it was plugged in over there"). However, there is a well known principle that correlation does not imply causality . (For example, the failure of a device shortly after it has been plugged into a different outlet doesn't necessarily mean that the events were related.
The Pentagon and the Director of National Intelligence have released the annual report on UFO sightings and while they still haven't found any extraterrestrial origin for the more than 700 new ...
Fan reaction seems overwhelmingly positive to this format, and the system is working exactly how it’s designed. This big, beautiful mess gave us one of the most dramatic seasons I can recall.
For example, spread-spectrum time-domain reflectometry (SSTDR) is used to detect intermittent faults in complex and high-noise systems such as aircraft wiring. [7] Coherent optical time domain reflectometry (COTDR) is another variant, used in optical systems, in which the returned signal is mixed with a local oscillator and then filtered to ...