The working state of the power transmission system of the hydraulic transmission catenary operation vehicle is controlled by the power transmission electronic control system,and if the power transmission electronic control system fails during vehicle driving,it will cause a fault to stop.In the power transmission electronic control system,relay failures occur from time to time.The principles of power transmission electronic control system of hydraulic transmission catenary operation vehicle and its relay were introduced,the relay fault was analysis,and provided a reference for effective on-site disposal of the relay fault of power transmission electronic control system.
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