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During fault in transmission line what will be the power factor?
It depends on the nature of the transmission line mostly under a fault it is the inductance that will be limiting the fault current so your power factor would be quite low. The exact number would change from line to line. During a fault (say three phase fault for simplicity), the power factor will drop to the line angle (assume no, or very little fault resistance). On EHV systems, this is in the 80 - 88 degree range (typically). On VHV, it is often in the 70-80 degree range. A line angle of 90 degrees is a pf of 0, so to convert between this line angle and power factor: pf = cos (line angle). As voltage gets lower, the assumption of no fault resistance becomes less valid, and the line angle becomes less (increased power factor). The lowest VHV line angle I've seen is in the 60-70 degree range. I've seen 40-60 on HV, and as low as 30 degrees (.86 pf) on underground cabling.
Can an electrical short be caused a phase to a phase?
It could be a phase to phase, ph to neutral or earth fault. In single ph wiring ph to ph exhibits no short ckt faultAnswerYes, but you have got the terminology wrong. There is no such thing as 'phase-to-phase', the correct term being 'line-to-line'. So you can have a short circuit as a result of a line-to-line fault, a line-to-neutral fault, or a line-to-earth fault.
3 types of faults?
Reverse faultNormal faultStrike-slip fault
How does a distance protective relay work?
The distance relay trips when a fault occurs at a distant or a remote place in the electric transmission line. There is a mechanism based on the impedance calculation of the distance of the transmission line after which it is accurately known where the fault has taken place. Thus the distance protective relay can trip the circuit & prevent the fault to be carried further and also can indicate the location of the fault.
Why neatural ground resistor using in 33kv transformer?
The function of a neutral earth resistor is to limit any fault current resulting from fault between a line conductor and earth.
What fault line did the Kobe earthquake happen on?
Kobe is on the nojima fault line
Why would people knowingly build on a fault line?
It's hard to say why people would knowingly build on a fault line. Usually it seems to be a case of people assuming that nothing bad will happen.
What fault line did the Darfield earthquake happen on?
the grendale falt line about 10 minites from darfield
Where do the volcanoes and earthquakes occur?
They Can occur anywere a Fault Line is on Earth They happen when earths crust releases and the Fault Line send out Energy =p
Why don't earthquakes happen in England?
England is not on or near a fault line.
What fault line did the 1931 napier earthquake happen on?
The Napier-Hastings fault. Its' a blind fault and only ruptured he surface along a 15km stretch of the fault.
Why do earthquakes happen?
earth quakes happen because of the fault line. Underneath the suface the plate are moving
Why do most earthquakes happen?
earth quakes happen because of the fault line. Underneath the suface the plate are moving
Why earthquake happen?
earth quakes happen because of the fault line. Underneath the suface the plate are moving
Can earthquakes happen every where?
no only on or close to the edges of a fault line or tectonic plate
Is India near a fault line?
There are different plates near India, so there would be a fault line, or maybe a lot.
What is the fault system that causes most of California's earthquakes?
That would be the San Andreas fault line.
