Multi-function device for current collecting system, has HOC/HMC switch that switches between two states, voltage sensor that recognizes voltage conveyed by roof cable, and protection unit to protect against lightning and shunting impacts

摘要

The device (20) has a HOC/HMC switch that switches between two states according to whether a roof cable conveys DC or single phase current. The switch connects the cable to a DC power line in one state, and insulates cable and sets the line to ground or to another line in another state. A voltage sensor (PP`) recognizes the voltage conveyed by the cable, and a protection unit (PFC`) to protect against lightning and shunting impacts. An independent claim is also included for a current collecting system for railway rolling stock comprising a multi-function device.