transformer XHL

[xernoxian]

I need help understand the relationship between a transformer's impedance in per unit and it's XHL.

 

[7anoter4]

I think XHL it is the reactance between High voltage to Low voltage windings-what usually we call it "transformer reactance" X12, if there are only 2 windings,
and will be XHL,XHT and XTL if there are 3 windings. This is the notation proposed by IEEE in
Distribution System Analytical Data Dictionary
Transformer impedance includes also transformer resistance.In order to find the transformer reactance one has to know the
resistance or at least the ratio R/X

 

[xernoxian]

hi, so does XHL mean that the reactance of the low side is transferred to the high side?

 

[7anoter4]

Actually, it is the total reactance viewed from high voltage side and includes the high voltage winding reactance and the low voltage
reactance transferred to high voltage side [see Steinmetz Diagram].The short-circuit impedance of the transformer is the result of Short-circuit Test by supplying the
high voltage side with Short-circuit Voltage and measured in the short-circuited secondary the rated current. One has to extract the reactance,
from this impedance knowing the a.c. equivalent -total-resistance.

 

[jghrist]

I think we need the context of XHL. 7anoter4 assumes that this is the reactive part of Z_HL, but I've never seen any reference to just the High to Low side reactance. I'm thinking that the OP's XHL may be something completely different.