Analysis of Selection Method for Fuses in Testing Circuit of DC Traction Power Supply System for Rail Transit
This paper describes the functional principle of the DC traction power supply system line testing circuit,as well as the calculation method for selecting fuses for the line testing circuit.It is proposed that the rated capacity of fuses mainly depends on the rated capacity of the DC cable and contactor in the line testing circuit,the size of the line testing resistance,and the logic of the protection device line testing.The selection of fuses generally considers a certain margin,and the smallest specification fuse should be selected.
DC traction power supply systemline testing circuitcurrent limiting resistorcurrent limiting fuse
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