Method for measuring the capacity and resistance of interwinding insulation in power transformers

摘要

the measurement method with capacity and resistance miu0119dzyzwojowej riz insulation in transformers includes two energy measurements. the first: rezystorem (rr) set value current i0 and measured voltage on the winding of more ub0 consuming (b - 0), and then switch (w2) closes winding powered (b 0) and recorded the dissipation power and (t).the power dissipation and (t) is constant for time tl measurement electromagnetic. second: re fixed value current i0, and subsequently, a switch (w1), excludes current i0 and recorded the voltage u (t) for the winding of more (b 0). the voltage u (t) is read, and the maximum value voltage umax fu under the curve of voltage.from the measured current value i0 and voltage umax and parameters tl and fu is calculated with capacity and resistance riz: (a).