In DC railway substations where series reactors, which is necessary to limit fault currents, are not equipped, the fault current would quickly rise so that the circuit breaker can not interrupt the fault current, in case a short-circuit accident occurs near the substation. We carried out transient simulations with a simplified fault circuit model to obtain appropriate inductance to limit fault currents in DC electric railways, and proposed a new type reactor, which we call magnetic tube type reactor from the shape. This paper describes the result of the above simulation, the outline of the magnetic tube type reactor and its test results.

Copyright (c) 2004 Railway Technical Research Institute