Recent content by cabby

Looking for remmendations for review material on Transmission and Distribution Protection. I do poorly in this section.

Can anyone recommend a good review for power electronics?  I continue to do poorly in this section.

Thank you everyone. The answer to the problem was 6.6 @ -58 degrees. The magnitude therefore is 6.6A for the neutral current.

Has anyone worked this problem yet? 34.5kv, 3phase, 4 wire, Y-connected, distrobution panel is experiencing unbalanced load conditions. Phase A load=(120+65j)kva @ (19.9 angle 0) kv. Phase C load=(65+20j)kva @ (19.9 angle 0)kv. Calculate the neutral current. for the life of me, I do not...

Will be studying for the "Power".

The new exam format is killing me. I have taken this thing some many times I have seen the exam 3 different ways. I have scored everywhere between 50-69% and have yet to pass the stupid thing. This last time, I thought was the easiest exam to date, guess not. (one of my lowest scores). I am...

I did poorly on the morning sections which was my down fall. Does anyone have any recommendations for reference material or pointers. Specifically, "Devices and Power Electronic Circuits" relays, plcs, variable speed dreives, power supplies, etc. and "Measurement and Instrumentation" VOM...

Has anyone used any of the classes on PDHonline.org for a review? I am looking at some of them and am curious if it is worth anything. thanks, cabby

Attached is how I approached it.

Just a note- if you have the McGraw Hill 15th edition, "Handbook for Electrical Engineers", page 23-38 talks about Triplen Harmonics. Also, if you have Theodore Wildi's book "Electrical Machines, Drives, and Power System" he talks about it in Chapter 30, Harmonics. That is in the...

Attached is how I approached the problem.

Can someone point me to reference material on tripping schemes or something to aid in solving this. thanks, cabby

Has anyone worked this problem yet? I am not sure how they are getting 2 times the peak voltage? Does the capacitor charge to the same voltage as the 120Vrms source? Then do KVL which would give you 240Vrms. Or sqrt2 * 240Vrms=339Vpeak? I am not sure if this is the right approach or not...

Has anyone worked this yet? I do not remember symmetrical components. Anyone have a crash course? thanks, cabby

Does anyone know of a company that will rent a Fluke 1760TR? It is a pricey piece of equipment and I am just looking to use it for some testing on a project. thanks, cabby