A device for monitoring condition of a railway supply

The device (18) is intended to monitor condition of a railway supply line when the supply line is in contact with a head (14A) of a pantograph (14) of a vehicle (10) in order to power said vehicle (10). The device (18) includes a camera (26) for monitoring parameters indicative of operating capability of said supply line. The device (18) includes a reflective element (20), comprising a pattern (22), intended to be arranged onto the pantograph head (14A). The camera (26) is intended to be arranged on the vehicle (10) so as to register the pattern position regarding a vertical direction.