The Operating Time of an IDMT Relay (PSM constant) using MATLAB code

PSM (Plug Setting Multiplier)constant and TSD(Time Setting Dial) variable

PSM constant and TSD variable

Code:

//clc

//close all

clear all

//alfa =0.50000;

//i_threshold =50000;

//i_load =1:100;

//x1 =length(i_load);

//for m=1:5,

    ///TSD=m*1;

    //for x=1:x1;

       // if i_load(x)>i_threshold

            /operating_time(m,x)=TSD./((i_load(x)/i_threshold)^alfa-1);

       / else

            //operating_time(m,x)=100000;

        //end

   

    //dd=['r','g','b','k','m']

    //semilogy(operating_time(m,:),dd(m));

    grid on;

    hold on;

end

//legend('TSD=1','TSD=2','TSD=3','TSD=4','TSD=5')

//axis([0 100 0 100])

//title('Load Current vs Relay operating Time');

//xlabel('Load current(A)');

//ylabel('operating time(sec.)');