Arcing power
Arcing power
(OP)
Going through old posts related to arc flash, I came across thread238-161138: Worst Electrical Fault a statement that If fault arcs are assumed to be resistive then the maximum power occurs when the arc resistance matches the source resistance. How about purely inductive source? Here, arcing resistance would have to be equal zero to produce maximum power, which does not make any sense. I think purely inductive circuit is in fact capable to produce more active power dissipated in arc than purely resistive circuit, assuming total impedance, system voltage and bolted fault current is same for both. My reasoning is that in the case with purely reactive source arcing resistance would be the only resistance present to dissipate active power.
Any comments?
Any comments?






RE: Arcing power
RE: Arcing power
RE: Arcing power
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Arcing power
RE: Arcing power
RE: Arcing power
For many purposes it is an adequate approximation to assume a purely inductive circuit, but for other purposes it is not. Back when computations were difficult it made a great deal of sense to assume the power system to be purely inductive for the purposes of fault studies; that way all of the calculations could be made with real numbers. But certain aspects of power system performance have never been able to be modeled without accurately accounting for resistance.
RE: Arcing power
Purely theoretical problems are interesting. Sometimes they can even be useful. Like in this case, when considering a purely theoretical problem revealed an error, linguistic or otherwise.
RE: Arcing power
RE: Arcing power
RE: Arcing power
RE: Arcing power