When students can connect the motor with hand operated start and stop, they should read up a schedule for connecting in an motor with automatic reverse and automatic Y and D connection.They have 3 different motors to connect.
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Excellent photographs that show the different motors you use. Do you students learn these procedures quickly? Ho do you go about teaching them? In Australia we use very similar techniques with our students.
ReplyDeleteFirst they learn to handle simple connections. After that they have a period of practice.
DeleteWhen they now how to do that they can learn more complicated techniques.
After four weeks they can do the most complicated practice.
In what year will your students do the kind of connections that you shows on the picture? It seems complicated for a person like me. I do not have these knowledges;-)
ReplyDeleteThey learn this in second and third class.
DeleteThe most complicated is in the third class.
They are learning schematic reading.
I'm wondering, what's a Y and D connection?
ReplyDeleteThat is when you can´t start the motor directly you must start it in two different couplings.
ReplyDeleteFirst you start the motor in a couplings terminal in Y that means that the motor gets 230 V at the motor linking then you couplings the motor in D who get the motor linking 400V.
If you do like this the motor takes just 1/ 3 in start current.
Then you don't have to get so big cables to the motor.
Now you have more inverters they have the same function.