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ET332b Discussion Points for Lab 5

20 pts

1.) Explain what impedances are found from the results of the short circuit test

2.) Explain the procedure used in making the short c ircui t test and also tel l why there is no

interaction with the core and magnetizing effects from the open circuit test.

3.) Use equations to show how the test results are used to find the transformer impedances

4.) Compare the magnitudes of the winding impedances with those of the open circui t test.

Explain why the winding impedances should be lower than the open circui t impedances.

5.) Define copper losses and identify what parts of the transformer cause them

Spring 2002 dp- lab5.doc