Apparatus and method for measuring contact resistor of pantograph, and pantograph charging system having the same

摘要

The pantograph contact resistance measurement apparatus according to the present invention includes: a measurement power supply unit for supplying a measurement current to a plurality of feed electrodes; A power supply switch unit and a power receiving switch unit disposed between the plurality of power supply electrodes and the measurement power supply unit and controlled to form a different current path for the measurement current supplied from the measurement power supply unit; And a calculator configured to calculate a contact resistance between the power supply electrode and the power reception electrode, respectively, based on a voltage and a measurement current at both ends of the power supply electrode on the current path. Accordingly, the present invention measures the contact resistance between the feed electrode and the receiving electrode even with a simple structure in the pantograph charging method through a number of measuring methods in which the current path of the measured current is different, and at the same time, identifies the electrode where contact failure occurs. Therefore, it is effective to prevent fire and electric shock accidents caused by contact failure in advance by making it easy to resolve contact defects.