In a trolley-wire display device, a display reference point of point-group data is set for each point on a trolley wire having a height and a displacement measured based on a reference obtained from rails. First and second points on a track center line are used to calculate a first distance, and a third distance based on the first distance and a second distance. The first point corresponds to the display reference point. The second point corresponds to each point on the trolley wire. The first distance is a distance from the first point to each second point. The second distance is a distance from a positional start point to the first point. The third distance is a distance from the start point to each second point, and is used to create display data for displaying a height and a displacement of each point on the trolley wire.

In a trolley-wire display device, a display reference point of point-group data is set for each point on a trolley wire having a height and a displacement measured based on a reference obtained from rails. First and second points on a track center line are used to calculate a first distance, and a third distance based on the first distance and a second distance. The first point corresponds to the display reference point. The second point corresponds to each point on the trolley wire. The first distance is a distance from the first point to each second point. The second distance is a distance from a positional start point to the first point. The third distance is a distance from the start point to each second point, and is used to create display data for displaying a height and a displacement of each point on the trolley wire.

Electrified roadway systems include a roadway, and vehicles configured to operate on the roadway. The roadway has a base, and two electrically-conductive rails mounted on the base. One of the rails is electrically connected to a source of electric power, and the other rail is electrically connected to an electrical ground. The vehicles include non-electrically-conductive tires, and an electric motor mechanically connected to, and configured to rotate at least one of the tires to propel the vehicle along the roadway. The vehicles draw electric power from the roadway via two electrical pickups. The electrical pickups are configured to move between a deployed position at which the pickups contact the respective rails, and a retracted position at which the pickups are out of contact with the rails.

A monitor vehicle for a rail system includes a wheeled trolley, an overhead vehicle, a supporting structure, and a first sensor. The wheeled trolley is above a rail of the rail system, is operable to move over the rail, and has a bottom surface. The overhead vehicle body is suspended by the wheeled trolley and below the rail. The supporting structure connects the wheeled trolley and the overhead vehicle body. The first sensor is on the bottom surface of the wheeled trolley and is configured to detect a first parameter of the rail of the rail system.

A monitor vehicle for a rail system includes a wheeled trolley, an overhead vehicle, a supporting structure, and a first sensor. The wheeled trolley is above a rail of the rail system, is operable to move over the rail, and has a bottom surface. The overhead vehicle body is suspended by the wheeled trolley and below the rail. The supporting structure connects the wheeled trolley and the overhead vehicle body. The first sensor is on the bottom surface of the wheeled trolley and is configured to detect a first parameter of the rail of the rail system.

A contact wire clamp includes a first clamp body and a second clamp body. The first clamp body and second clamp body each define a contact wire channel and a safety rope channel. The safety rope channel includes a plurality of ridges, each of the plurality of ridges spaced apart from neighboring ridges to define a plurality of troughs. The contact wire clamp further includes a mechanical fastener connecting the first clamp body and the second clamp body together. The safety rope channels of the connected first clamp body and second clamp body face each other and together form a safety rope passage.

A contact wire clamp includes a first clamp body and a second clamp body. The first clamp body and second clamp body each define a contact wire channel and a safety rope channel. The safety rope channel includes a plurality of ridges, each of the plurality of ridges spaced apart from neighboring ridges to define a plurality of troughs. The contact wire clamp further includes a mechanical fastener connecting the first clamp body and the second clamp body together. The safety rope channels of the connected first clamp body and second clamp body face each other and together form a safety rope passage.

A current collector for an electrical load that can be moved along a conductor line in a travel direction. The current collector has at least one contact piece, which is supported on a rocking arm to be rotatable about an axis of rotation extending perpendicularly to the travel direction. To bring the contact piece into contact with an electrically conductive conductor strand of the conductor line, the contact piece can be moved toward the conductor strand by the rocking arm. The current collector also includes a connection cable, which connects the contact piece to a connection terminal for the electrical loads in an electrically conductive manner. A conductor line system includes a conductor line and at least one electrical load that can be moved on the conductor line in the longitudinal direction of the conductor line. The conductor line has at least one electrically conductive conductor strand for bringing into sliding contact with at least one contact piece of a current collector.

A current collector for an electrical load that can be moved along a conductor line in a travel direction. The current collector has at least one contact piece, which is supported on a rocking arm to be rotatable about an axis of rotation extending perpendicularly to the travel direction. To bring the contact piece into contact with an electrically conductive conductor strand of the conductor line, the contact piece can be moved toward the conductor strand by the rocking arm. The current collector also includes a connection cable, which connects the contact piece to a connection terminal for the electrical loads in an electrically conductive manner. A conductor line system includes a conductor line and at least one electrical load that can be moved on the conductor line in the longitudinal direction of the conductor line. The conductor line has at least one electrically conductive conductor strand for bringing into sliding contact with at least one contact piece of a current collector.

A railway direct-current system according to the present invention is provided with: a feeding line that is connected to a plurality of electric power substations arranged along a railway; and a trolley line that is connected to the feeding line via feeding branch lines at an arbitrarily defined interval, wherein a superconductive feeding cable is connected to somewhere midway in each of railroad lines extending from the substations to the trolley line via the feeding lines, so as to be parallel with the railroad line.