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In an electric power system, a fault or fault current is any abnormal electric current. For example, a short circuit is a fault in which a live wire touches a neutral or ground wire. An open-circuit fault occurs if a circuit is interrupted by a failure of a current-carrying wire (phase or neutral) or a blown fuse or circuit breaker .
The conventionally used aid in cable fault testing and location is the cable test van. The van is installed with conventional cable measuring systems for quickly reaching the location of any cable fault. In 20 years that followed, over 2000 fault location vehicles were manufactured, more than half of which were intended for the former USSR.
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.
A time-domain reflectometer (TDR) is an electronic instrument used to determine the characteristics of electrical lines by observing reflected pulses. It can be used to characterize and locate faults in metallic cables (for example, twisted pair wire or coaxial cable ), [ 1 ] and to locate discontinuities in a connector, printed circuit board ...
An electrical arcing event will often (though not always) cause a loss of power downstream on the electrical line, such as by severing the conductors or tripping a circuit breaker; as a result, a significant part of arc-map analysis is determining the order in which sections of electrical lines lost power. In most cases, the electrical faults ...
Contact voltage on the enclosure of electrical equipment can appear from a fault in the electrical power system, such as a failure of insulation. A fallen power conductor from a transmission line forces current through the earth back to the source, which is connected to the earth.
Given the match in Spain followed a sub-standard first 45 minutes at Newcastle a week ago, are we witnessing the formation of some worrying fault lines leaving the team exposed defensively?
In an electrical grid, the short circuit ratio (or SCR) is the ratio of: the short circuit apparent power (SCMVA) in the case of a line-line-line-ground (3LG) fault at the location in the grid where some generator is connected, to: the power rating of the generator itself (GMW).