madisonbadgers
Electrical
I have been reading the following closed thread
And then I found this pdf below.
as I understand this, the Delta Wye example shown on page 20 is a Dyn11 because the Secondary line to line voltage is leading the primary line to line voltage.
Now the next example on page 22 as I read the documents that is a Dyn7? transformer due to the 150 degree lag.
My question is in the US when I buy a transformer from someone like Sq. D
750KVA 480V 3 phase primary and a 120/208V Wye secondary.
I read on here that a typicall US delta wye transformer is a Dyn1 with the secondary line to line voltage LAGGING the primary side line voltage by 30 degrees.
I like the Labvolt pdf because it included vector and time domain images to help me understand. If someone could help me understand how the dots are arranged in the US typicall transformer I would appreciate it.
thank you for your time and have a good day
And then I found this pdf below.
as I understand this, the Delta Wye example shown on page 20 is a Dyn11 because the Secondary line to line voltage is leading the primary line to line voltage.
Now the next example on page 22 as I read the documents that is a Dyn7? transformer due to the 150 degree lag.
My question is in the US when I buy a transformer from someone like Sq. D
750KVA 480V 3 phase primary and a 120/208V Wye secondary.
I read on here that a typicall US delta wye transformer is a Dyn1 with the secondary line to line voltage LAGGING the primary side line voltage by 30 degrees.
I like the Labvolt pdf because it included vector and time domain images to help me understand. If someone could help me understand how the dots are arranged in the US typicall transformer I would appreciate it.
thank you for your time and have a good day