How are protection curves adjusted for devices operating at different voltages?
TCC graphs never give a reference voltage. 100A @240VAC isn't the same as 100A @480VAC.
I understand that 100A @240VAC is the same as 50A @480VAC if devices are on each side of a transformer.
My main reason for asking is the coordination software out there will move curves based on the reference voltage of the plot. You can make a 125A look like it trips at many other currents than its rating just by changing the plot reference voltage. I believe I have thought about this too much and have confused myself. I guess a cable/panel's current rating is what it is regardless of what voltage it is applied at. It just seems like there is something i am missing.
TCC graphs never give a reference voltage. 100A @240VAC isn't the same as 100A @480VAC.
I understand that 100A @240VAC is the same as 50A @480VAC if devices are on each side of a transformer.
My main reason for asking is the coordination software out there will move curves based on the reference voltage of the plot. You can make a 125A look like it trips at many other currents than its rating just by changing the plot reference voltage. I believe I have thought about this too much and have confused myself. I guess a cable/panel's current rating is what it is regardless of what voltage it is applied at. It just seems like there is something i am missing.