Hello all,
I am a newer engineer, and have recently been given the job of performing a sectionalizing study for a local utility. As my employer was going over some of the basics with me, he mentioned enabling incipient fault detection on the substation relays. He was actually not certain how...
I am searching for an online course on FEA applied specifically to electrical engineering. It seems that most FEA courses are within the mechanical or civil engineering department, with the instruction tailored more toward topics that would be of interest to someone of that specialization...
It has always been my understanding that a true delta system has no neutral.
I came across a few documents today however that seemed to indicate otherwise. It says that there actually is a neutral, due to capacitance between the phases. Is this true? If so, can it be used as a reference...
A few people in my office have AutoCAD (two copies of 2010 and two of 2004). One of them is an AutoCAD operator, and the other three are engineers. Some of the engineers will open a drawing that the CAD operator made and make changes to it, but do not update the revisions section. They make...
A low voltage molded case circuit breaker is often given several ratings of interrupt current. For example:
14kA at 600V
18kA at 480V
Let's say I'm using a breaker with a 600V frame on a 480V system. Is my interrupt rating 14kA or 18kA?
I was under the impression that the interrupt rating...
I'd like to begin this question by stating up front that I have no intention of this turning into a PE vs. non-PE debate, or that I am questioning the necessity of PE stamps or the qualifications or abilities of PEs and non-PEs.
My question does however concern what requires a PE stamp (I am...
Hello,
I am trying to wrap my mind around what conditions will result in corona discharge, and what will result in an arc.
Is it that, if the potential gradient is high enough, corona discharge will occur? If there happens to be conductive material within the ionized region, a sustained arc...
I'm considering enrolling in a masters program... I was thinking Master of Engineering (I am done with my BS and working). However, a recent thread was posted with the opinion that an MS was better than an M.Eng, that got me rethinking.
My thought was that the two are nearly the same... the...
I'm debating the accuracy of arc flash hazard analysis. Several I have spoken to speak of incident energy and appropriate protective clothing as definitive values. "If you have a certain clothing rating, it WILL protect against an arc flash of a particular value." However, it seems that it is...
Hello,
I recently graduated from Purdue University with a degree in electrical engineering technology. I was fortunate enough to find a job, and my employer wants me to get my PE. I've been approved for the April 2010 FE exam in Indiana.
My question concerns taking the general or the...
Hello,
I'm trying to teach myself a little about symmetrical components, and am in the middle of a problem. To any who has a copy of the Westinghouse Transmission and Distribution Reference Book (or would like a pdf...
Hello all,
I am a novice programmer, and have recently began creating simple calculator applications using Visual Basic (I am a power engineer... these are small applications for basic but tedious calculations).
I have often found that after I enter all my data and return a result, if I...
Hello all,
I am analyzing the effect of switching in various capacitor stages on voltage rise throughout a system (see the attachment). Looking at only one capacitor (say cap bank E at 6.3MVAR) and its effect on bus B, I calculate the rise by dividing the capacitor kVA by 100 (100MVA base)...
