Evaluation of Current-Carrying Capacity of Copper-Cladding Steel Messenger Wire for Electric Railway

초록

In order for the feasibility study of copper-cladding steel(CCS) messenger wire, which is a newly developed overhead line for electric railway, we compared its electrical performance with that of conventional Bz messenger wire by means of evaluating current-carrying capacity for steady-state and transient-state. The current-carrying capacity was calculated with the mathematical process based on heat balance equations in accordance with IEEE standard 538. And to clarify calculated result for transient-state, we investigated the thermal durability to withstand the fault current caused by electrical contact of conductive objects. From the results, the CCS messenger wire had 20% higher steady-state thermal rating than Bz messenger wires. In transient-state, the CCS messenger wire had excellent thermal durability than Bz messenger wire. This study revealed that the CCS messenger wire had electrical performance sufficient to substitute the Bz messenger wire