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Current Transformer Burden Adequacy Calculation

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Current Transformer Burden Adequacy Calculation

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25 Dec 2007 (Updated )

GUI to calculate the adequacy for chosen CT according to the connected load & wire length

CT_Burden(varargin)
function varargout = CT_Burden(varargin)
% CT_BURDEN M-file for CT_Burden.fig
%      CT_BURDEN, by itself, creates a new CT_BURDEN or raises the existing
%      singleton*.
%
%      H = CT_BURDEN returns the handle to a new CT_BURDEN or the handle to
%      the existing singleton*.
%
%      CT_BURDEN('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in CT_BURDEN.M with the given input arguments.
%
%      CT_BURDEN('Property','Value',...) creates a new CT_BURDEN or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before CT_Burden_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to CT_Burden_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help CT_Burden

% Last Modified by GUIDE v2.5 25-Aug-2007 10:54:41

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @CT_Burden_OpeningFcn, ...
                   'gui_OutputFcn',  @CT_Burden_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before CT_Burden is made visible.
function CT_Burden_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to CT_Burden (see VARARGIN)

% Choose default command line output for CT_Burden
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes CT_Burden wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = CT_Burden_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes on selection change in popupmenu1.
function popupmenu1_Callback(hObject, eventdata, handles)
% hObject    handle to popupmenu1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns popupmenu1 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from popupmenu1


% --- Executes during object creation, after setting all properties.
function popupmenu1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to popupmenu1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit1_Callback(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit1 as text
%        str2double(get(hObject,'String')) returns contents of edit1 as a double


% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit2_Callback(hObject, eventdata, handles)
% hObject    handle to edit2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit2 as text
%        str2double(get(hObject,'String')) returns contents of edit2 as a double


% --- Executes during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit4_Callback(hObject, eventdata, handles)
% hObject    handle to edit4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit4 as text
%        str2double(get(hObject,'String')) returns contents of edit4 as a double


% --- Executes during object creation, after setting all properties.
function edit4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit5_Callback(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit5 as text
%        str2double(get(hObject,'String')) returns contents of edit5 as a double


% --- Executes during object creation, after setting all properties.
function edit5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

clc
disp('                              C.T Burden Adequacy Calculation')
disp('                                       Eng.Saqer Ali,,,')
disp('                                           T.I.T')
disp(' ')
disp(' ')
disp('Part 1')
disp('Calculation Data')
disp('-----------------')
disp(' ')
disp('C.T Secondary Rated Current(A) :')
i=findobj(CT_Burden,'Tag','popupmenu1');

switch(get(i,'Value'))
    case 1
        disp('ans =')
        disp('    1')
    case 2
        disp('ans =')
        disp('    5')
end
disp(' ')
disp('Minimum C.T Burden(VA) :')
va=findobj(CT_Burden,'Tag','edit1');
str2double(get(va,'String'))
disp(' ')
disp('Cable Length(m) :')
l=findobj(CT_Burden,'Tag','edit2');
str2double(get(l,'String'))
disp(' ')
disp('Cable Resistance(Ohm/Km) :')
r=findobj(CT_Burden,'Tag','edit4');
str2double(get(r,'String'))
disp(' ')
disp('Connected Load To The C.T(VA) :')
load=findobj(CT_Burden,'Tag','edit5');
str2double(get(load,'String'))
disp(' ')
disp('Lead(Cable) Resistance(Ohm) Equation is:')
syms L Rs
y=(2*L*Rs)/1000;
pretty(y)
disp(' ')
disp('Where :')
disp('        L  : Length of C.T Cable(Leads)(m).')
disp('        Rs : Cable Resistance (Ohm/m).')
disp(' ')
disp('Lead(Cable) Resistance(Ohm) :')
(2*str2double(get(r,'String'))*str2double(get(l,'String')))/1000
disp(' ')
disp('Calculating The Required VA For The Leads Using The Relation I^2*R :')
switch(get(i,'Value'))
    case 1
        (2*str2double(get(r,'String'))*str2double(get(l,'String')))/1000
    case 2
        25*(2*str2double(get(r,'String'))*str2double(get(l,'String')))/1000
end
temp=ans;
disp(' ')
disp('Adding The Leads Burden To The Connected Burden(VA) :')
temp+str2double(get(load,'String'))
disp(' ')
disp('Adding 25% As Margin , So The Required C.T Burden Is(VA) :')
(temp+str2double(get(load,'String')))*1.25
disp(' ')
if str2double(get(va,'String'))>=ans
    disp('The Chosen C.T is ADEQUATE to your System')
else
    disp('The Chosen C.T is NOT ADEQUATE to your System')
end
disp('     **********************************************************')



% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
figure
load ctdata.mat
imshow(ctpic)
clear ctdata

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