Recent content by vskneifl

Well for some reason the table did not upload correctly so I have attached it here as a jpg.

I ran into this question last night and I found this website that really helped. />http://www.allaboutcircuits.com/vol_2/chpt_9/5.html Basically the step up / step down depends on if the load or source is connected to the center tap between the two coils. The buck / boost is dependent on...

Spin-Up Question #211 "Which are the equivalent Circuits for a three phase fault? Here is the circuit that they give it the answer. According to the symmetrical components by blackburn book this is a three phase to ground fault not a three phase fault. The zero sequence network should be left...

Typically the only time their is a phase shift is when you go from a delta to a wye or wye to delta and it is a 30 degree phase shift, a delta-delta and wye-wye will not have a phase shift. It is standard to always have the secondary side lag the primary side but a transformer can be designed to...

In a ungrounded wye the neutral is floating and not connected to ground, that the ground is independent so it acts just like a delta. When it ask what is the voltage at phase B it is in reference to ground not the neutral, and since phase A is connected to ground the voltage between phase B and...

I do have the errata for spinup I was just confused by the table "Maximum Distance" just makes it a little confusing but I understand now. Thanks for your help.

I was working the Spin-Up problem 1-67 and I don't understand how to read NEC Table 230.51©, is this a miss print?

I have tried to use the vectors as well I do fine on the magnitudes I just have trouble knowing when to add or subtract the angles. I have even created a phasing template to help me keep it straight (see attached pdf) on the simple problems I due fine but the more complex ones that I just can't...

That helps, thanks.

So I have been trying to understand ABC and ACB rotation relative to CW or CCW rotation and which is positive degrees and which is negative in degrees and if lagging is considered positive or negative direction as well. I did find this website http://www.marcspages.co.uk/pq/3120.htm that helped...