METHOD Experimental determination of the resistance of the windings of transformers

摘要

The method of experimental determination of the resistance of the windings of transformers, implemented by determining the transformer short-circuit impedance, characterized in that the first measured impedance short-circuit the three-phase transformer or a group of three identical single-phase transformers with primary winding connections schemes compound first in a triangle, and then into a star, then the measured capacity values ​​of the three phases R, average values ​​of linear voltage U and the current circuit is determined Ikorotkogo total z, z, active r, r and reactance x, xsoprotivleniya short circuit diagrams compounds transformer primary windings in star and delta, in this case calculated by the formulas: ,, r = F / I, r = R / (3I) ,,, then subtracted complete, resistance and reactance circuits with short circuit connections of the transformer primary windings in star and delta, the difference further increases 1.5 times and the phase resistance of the primary winding of transformers is determined by the formulas: Z = 1,5 (ZZ); r = 1,5 (rr); x = 1,5 (xx), wherein Z, r, x, - total, active and reactive soproti Lenia short circuit diagram of the transformer when the primary winding connections in a star; Zr, x- full, active and reactive transformer short-circuit resistance in the connection diagram of the transformer primary windings in a triangle.