Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / trevor
Think of a perfectly calm lake or pond, not a ripple in it.
Then you throw a large rock out into it. Ripples start from
that point and disperse 360 degrees outwards. The ripples
near the centre are higher and closer together than the
ripples further away from the point of impact, eventually
decreasing to no ripples at all as the surface tension of
the water takes over.
Now, in place of a lake or pond you have a field with a
high voltage(tension) power line in it; let's say 13,800
volts.
In place of the rock you have one of the high voltage lines
from the power pole that dropped into the field and is
making contact with the ground.
As the energy leaves the line and enters the ground, it
disperses outwards 360 degrees, gradually being absorbed by
the earth (or meeting enough resistance from the earth to
negate the energy) Unlike a pond, however, the energy
doesn't disperse evenly as different types of soil provide
less or more resistance than others.
As in the pond, the voltage that is nearer the point of
impact is higher than the voltage further out, i.e., 13,800
volts at impact, 9,000 volts a metre away, 6,000 volts a
metre from that and so on.
The concern is this; if you started walking towards the
downed line (at around one metre per step) from let's say a
hundred metres away, at first you'd be walking on ground
that has no voltage present. As you got closer the voltage
between your forward leg and back leg would be 100 volts.
Next step, 400 volts, then 1,000 volts. At some point
closer to the centre, you would take a step that is of a
high enough voltage (difference in potential between your
front and back foot) to either go through the footwear you
have on or jump over your footwear and go directly into
your legs. You are then creating a pathway for the voltage
to travel in and would have all of that voltage and
ampacity go through you.
| Is This Answer Correct ? | 35 Yes | 2 No |
Post New Answer View All Answers
How to Prepare preventive maintenance shedule of machine tool.
what is the major difference between LIBBP & HIBBP.. which one is most preferable..
If Neutral Grounding Resistor (GR) failed/shorted. Is it repairable.
Why we used 690V in ACS 800 drives.Why dont use standard voltage like 415v or 1.1Kv
A 1F capacitor is charged to 100V initially. A 1H inductor is connected accros the capacitor througha a switch. The current in the circiut when the switch is closed is____
when ID fan will immediately stop through VFD what exactly cause and problem the ID fan
Which motor will you choose which can operate in both lagging as well as leading power factors?
How many Zones can be in Conventional type fire alarm system & how can we detect the fire in Conv. type FAS?
which type of motor is used in automatic swing gate
I want to do a mini project. Now I'm studying in 6th semis tor EEE Engineering.
What is the effect of interchanging core(made of steel) and winding(made of copper) material in case of transformer? Give proper explanation in regard to different losses in transformer.
Which are resistive loads & which one are inductive loads : Refrigerator, Split air conditioner, ceiling fans, well pump, fluoresecent bulbs, T.V, CRT Monitors, Adsl Routers, C.P.U, Printers, Deep Freezers, Speakers, DVD Players, Microwave oven etc. ? Output Power for these Appliances Would be same like this : P = V * A * P.F Or would be changed ? thanks
excitation limit of an excitor
How to calculate or formula to calculate rhe power in 2 phase system ??
A Question Like A Wire Is Wound Whose Resistance Is Some 132. 44647 Ohms. If A Voltage Of 30 mv, 296 Ma Current Is Applied To It What Is The Resistance.
