35
Equivalent series impedance between low-voltage windings:
The equivalent series impedance Z(%) of two low-voltage windings shall be 10%. The allowable
error limit of the impedance voltage shall maintain 9% to 11%. This value can be determined when
the voltage in other low-voltage winding increases until one of the low-voltage windings is short-
circuited and a nominal current flows. Simultaneously, high voltage winding is in the no-load state.
