Abstract
A systematic overheating and a decrease of a level of maintenance of impedance bonds negatively affect the capacity of railway sections. As a rule, at calculation of capacity only permissible operation modes are checked while thermal operation modes of a return traction system are not considered. Moreover, such a check doesn’t consider a train schedule - at calculations an average current of a train with a maximum weight for a considered train schedule is used. In the paper the author studies mistakes of the generally accepted method on the basis of comparison with results of a direct calculation of an impedance bond thermal balance at train operation.
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