Chapter3-Transformer structure Insulation Heating and Load Stresses

Ex16-pg161

In [1]:
## Example3_16_pg161.sce
## To find radial force due to current
## Theory of Alternating Current Machinery by Alexander Langsdorf
## First Edition 1999, Thirty Second reprint
## Tata McGraw Hill Publishing Company
## Example in Page 161


import math

## Given data
va = 200e+3;  ## Volt Amperes of transformer, VA
v1 = 11000.; ## Voltage in volts
v2 = 2300.; ## Voltage in volts
T = 46.3; ## Mean length of the turn, inches
n = 455.; ## Number of turns
I = 1320.; ## Current in Amperes
l = 35.; ## length in inches
k = 1.8;
zeq_ht = 8.33;

## Calculations

F_av = (0.45/1e+7)*((T*n**2*I**2)/(k*l));
print'%s %.2f %s %.2f %s '%("\n  The radial force due to the current of ",I,"Amps" and  "given data is",round(F_av),"  lb\n");

## Result
##  The radial force due to the current of 1320 Amps for given data is 11930 lb
  The radial force due to the current of  1320.00 given data is 11930.00   lb