Plotting Overcurrent TCC on High/Low Side of Xfmr

[111R]

When plotting multiple time-current curves showing coordination between various protection devices, what is typically done to show the coordination between the high and low side of the transformer? If the X-axis shows the multiple of pick-up or current, the low voltage side will be graphed as picking up much quicker than the high side due to the transformer turns ratio. Do I need to reflect the primary fault current to the secondary so the curves reflect the correct coordination?

Thank you

 

[ScottyUK]

Yes, you transpose curves using the transformer turns ratio.

 

[davidbeach]

Any good coordination program will do that for you.