60 Hz Transformer in 50 Hz 3

[Dary67]

Can any body answer this common question in some technical interview:
" What will hapend to a 3 phase 60Hz transformer if supply with 50Hz and same voltage?"

 

[slavag]

Hi.
Please see attached graph of current in overexcitated/saturated trafo.

Keith, sorry, but I'm totally not agree with you.
Spaghetti w/o beer!!!!!, OK,compromise: with red wine.
Best Regards.
Slava

 

[waross]

Keith;
Shirly you haven't forgotten this lesson on power systems.

The Beer Analogy
KVA is Apparent Power.
It is the "vectorial summation" of KVAR and KW.
Let's look at a simple analogy in order to better understand these terms....
Let's say you are at the ballpark and it is a really hot day. You order up a mug of your favorite brewsky.
The thirst-quenching portion of your beer is represented by KW (Figure 1).
Unfortunately, life isn't perfect. Along with your ale comes a little bit of foam. (And let's face it...that
foam just doesn't quench your thirst.) This foam is represented by KVAR.
The total contents of your mug, KVA, is this summation of KW (the beer) and KVAR (the foam).

http://www.nakahoma.com/POWER_FA.PDF

Sorry, I meant to stop calling you surely.
Sorry Gunnar, the devil made me do it.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[itsmoked]

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[waross]

Surely we will both fail this interview, Keith.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[waross]

Saturation may be explained by the "Toilet Bowl analogy".
Think of a dry toilet bowl. Now imagine that it is being filled. Consider the depth of fluid to represent the voltage and the surface area to represent the current density.
As the fluid starts to rise in the bottom part of the toilet, the surface area stays relatively constant. This represents operation at voltages below the saturation voltage.
As the level increases, the toilet bowl starts to flare out, and the surface area starts to increase. This represents the increase in current as the voltage approaches saturation.
The toilet fills faster at 60 Hz. than at 50 Hz.


Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[Zogzog]

Wait now I am confused, wouldnt it fill faster at 50 Hz than 60 Hz per the V/Hz analogy?

 

[waross]

You are probably right Zogzog.
I think that I have just failed toilet flushing 101.
[flush]

Bill
--------------------
"Why not the best?"
Jimmy Carter