Recent content by Ampera18 PE

CONGRATS!!!

GOOD LUCK!!!

I can't imagine you didn't. You seem much more prepared for it than I was when i stepped into it.

yes i believe one should just use magnitude in the impedance and angle in the current

yes I think VB and VC are switched. Also I'm using Electrical PE Review notation where Vp = V fault The confusion lies in that Vpos = Vp - (Ipos * Zpos), not Ipos*Zpos And Vp = Ipos* (Zpos+ Zneg + Z0) So, distribute: Ipos* Zpos + Ipos * Zneg + Ipos * Z0 - Ipos*Zpos = Ipos *Zneg + Ipos *Z0 =...

I don't know the answer, but it will not be this wishy-washy on the exam itself.

thank you omg

@Sparky Bill, PE Thank you, i'm crying!

I passed!! I'm so happy and thankful!! Thanks to this forum, the discord, the subreddit, @Zach Stone, P.E.'s courses/videos and Eng Pro Guides sample exams. And also thanks to my coworkers/friends, but they're not virtual so they'll get real thank you cards. .

IDK is the melting of the fuse considered sensing? idk about that one protective relays are tripping devices. they trip contacts and breakers. If you just have a Normal MV VFI, with no relay, it won't trip because it has no brains.

I think not everything that has a time delay is a sensing device, which is why circuit breakers are not.  I also would also like to add to the conversation that circuit breakers, while switching devices, really are not meant to be switches, and they have a certain numbers of switching in their...

I think I get it now. you use the current for the 480V side, because that's what's changing? so current for 480 (I old) * 600 (Vnew) If it was 360/120 it's a 33.750 KVA transformer, right?

is that all that says? It says "following results obtained" and then, no results?

I'm so sorry you spent so long drawing it out for silly ol' me.  On the power, why is it just 600 * 93.75, but not 375-93.75? I thought, because it's a step up, the currents have to subtract. >_< this is over my head lmao 

Yes that's what it boils down to. I definitely didn't spend more than 10 minutes imagining actual potential differences -- nope!