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In this paper the efficiency of heating of continuous welded r ails (CWRs) under track laying when 3-phase low frequency supplying system is applied has been carefully considered. On the basis of computations confirme d by the investigated results, for different heaters location as well as differen t voltage phase shifts, the con- clusions concerning proper selection of the structure of th e energy supplying systems are formulated.

Efficiency of the 3-phase system to provide energy under low frequency induction heating of CWRs