PROCEDURE AND PREPARATION FOR REDUCTING THE SINGLE POWER POWER IN THE OPERATION OF AN INDUSTRIALITY HOLDER

摘要

PCT No. PCT/DE91/00216 Sec. 371 Date Oct. 30, 1992 Sec. 102(e) Date Oct. 30, 1992 PCT Filed Mar. 13, 1991 PCT Pub. No. WO91/17597 PCT Pub. Date Nov. 14, 1991.A transformer is energized from an a.c. source by initially applying the a.c. voltage to the transformer during small but progressively increasing fractions of a succession of initial half-cycles. This is continued until the rated voltage is achieved or until the reactive current exceeds a predetermined value below that which would cause tripping of the transformer. In the event that the reactive current reaches the predetermined value, the remanence of the transformer is set at a selected level by applying the a.c. voltage to the transformer during an additional half-cycle. The length of exposure of the transformer to the a.c. voltage during the additional half-cycle depends upon the circumstances. Once the remanence has been set, operation of the transformer proceeds normally.