I'm not looking to test for the x/r of the reactor. I'm looking to determine if there is a standard for how series reactors are given their rating. Typically a standard of this nature would define a range for which the x/r ratio of the source used for testing needs to fall in. You can't stamp a rated let-thru on the equipment without knowing the 65kA source impedance and x/r ratio.

If you know the source x/r ratio that it was tested at, you can then calculate the source impedance (in terms of r and x) and then from there the only unknown variable in the equation would be the r of the reactor and it could be calculated. I was hoping for a workaround for calculating r of the reactor without having access to the test report.

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