QuestionGuy
Member
The System Discription:
Need to provide 480V/3ph with less than 160 milli-Ohms of resistance.
The installed system
Building service = 120/208V 3ph 4w --> 75KVA X-former (5.11% @ 170C) --> 480/277V 3ph 4w
I am measuring 11 m-ohms on primary side & 261 m-ohms on secondary.
What %impedance do I need to achieve < 160m-ohms?
Will a 112.5 KVA X-former achieve this?
Do I need a 150KVA ?
Need to provide 480V/3ph with less than 160 milli-Ohms of resistance.
The installed system
Building service = 120/208V 3ph 4w --> 75KVA X-former (5.11% @ 170C) --> 480/277V 3ph 4w
I am measuring 11 m-ohms on primary side & 261 m-ohms on secondary.
What %impedance do I need to achieve < 160m-ohms?
Will a 112.5 KVA X-former achieve this?
Do I need a 150KVA ?