Hi
I assume you are debugging a *.exe?
If so then you should look at the messages returned in the command line window.
On the first line you will see the reference to the cause of the problem ...
examples : division by zero ...
: square root of negative number....
: etc...
I would be surpised if you have any problems with Areva T&D as they are certainly one of the major transformer manufacturers. As you rightly say, they were formerly part of the Alstom group and their UK division was previously GEC before that. For more information on this company you could try...
As mnewman says, the current rating is based on the no-load voltage. You need to check the no-load voltage quoted on the transformer rating plate. Typically this will be 433 V so I would agree with mnewmans value of 2133 Amps as the rated current of this winding.
Clearly the efficiency depends upon the load and no-load loss characteristics of the transformer.
As an estimation a 2.5 MVA 11/0.433kV transformer will have approximately 2.8 kW no-load loss & 21 kW load loss.
Assuming these figues the maximum efficiency will be approximately 99.4% at unity...
Again for your interest..
The suggestion to use zig-zag (Zn) LV's with HV's having phase-shifted windings would increase the complexity and cost of the transformer.
For the LV side you will still face the problem of a low number of turns, and you will introduce the additional problem of winding...
This maybe not a direct answer to your question, but it may help your understanding.
For the 12 pulse rectifier transformer the first thing to realise is that there is a limited number of turns ratios that can be used. As one secondary will be Delta connected & the other Wye connected, the...
Perhaps this will help ...
You can dimension an array using integer variables.
these variables can be passed into your function or subroutine along with the value you want to assign
As a very basic example:-
SUBROUTINE DOTHIS(NARG,MARG,VALUE)
DIMENSION MYARRAY(NARG,MARG)
DO...
You could use VB to create the interface.
The purpose of the interface being to create the input files needed to run your Fortran program. The Fortran program can be compiled as a *.dll to be called from your VB interface. Output files can be displayed directly in the VB interface.
How?
In...
No
But provide the original code author used true VB coding, rather than relying on VBA functions and commands then it is a relatively simple job to extract and compile the files directly using VB ... as the other respondant has already indicated.
Many transformer rating plates show the tested load loss figures. This will be the value at the rated power and will have been corrected to a reference temperature, usually 75°C for IEC oil filled transformers.
If the information is not on the rating plate it will certainly be available on the...
Large transformer cores are commonly defined in the following way:
Legs = wound limbs = the section of core upon which the coils are mounted
Yoke = the sections of core joining the wound limbs
Normally' Legs can be considered to be the vertical parts and yokes the horizontally parts connecting...
You could try
"Heat Transfer"; 7th ed ; J.P. Holman; McGraw-Hill; 1990
(I think it's on 8th ed now!)
I have found this to be an excellent reference
Regards
I agree with trainguy. I spend almost half day to derive the formulae for design upside-down T beam and another half day to run full finite element analysis to check my formulae. And,it is found that using upside-down T beam is not a good design at all...soory to be another downer
Hi,
I am looking for a reference about composte joist design. I know how to design composite beam (composite action between slab concrete and I-shaped beam with shear stud), but I am not sure that the same concept can be used in case of open-web steel joist. Any good references to read...
Y ou can check web cripping (bearing) strength of deck to make sure you have enough bearing length. AISI specification and "COLD-FORMED STEEL DESIGN" by Prof. Wei-Wen Yu should be a good reference.
I am designing very big double-pitched roof truss (6"per foot pitch, 20 feet deep at midspan, span length is 90'-0"). We can't build this in one piece. So we plan to build two trusses with 10'-0" deep each and splice them in the field. Does anyone have an idea how to check lateral...
I think " steel deck diaphragm design manual" by Prof. Larry D. Luttrell would be a good reference. You can buy it from SDI. His research shows that compressive strength of deck is controlled by local buckling at each flute, and he develop some kind of eqivalent spring concept to...
