A system for monitoring a pantograph of a railway vehicle, the pantograph being adapted to be connected to a catenary and electrically connected to a traction unit, the catenary being adapted to provide an alternating current to the railway vehicle, the system further including: a voltage step detection device for detecting a voltage step of a pantograph voltage at the pantograph, a zero crossing detection device for detecting a zero crossing of a line current, the line current being a portion of a pantograph current provided to the traction unit, the pantograph current being the current flowing through the pantograph; and a bouncing detection portion adapted to determine at least one bouncing time of the pantograph based on one or more detected voltage steps of the voltage step detection device and/or one or more detected zero crossings of the zero crossing detection device.

A body weight support system includes a support track configured to movably suspend a trolley therefrom. A power rail of the system is coupled to the support track and is in electrical contact with the trolley. A switch included in the system has a support track portion and a power rail portion. The switch is configured to transition between a first configuration, in which a first portion of the support track and the support track portion of the switch define a first path, and a second configuration, in which a second portion of the support track and the support track portion of the switch define a second path. The trolley is configured to receive a flow of electric power from at least one of the power rail or the power rail portion of the switch that is operable to move the trolley along the first path or the second path.

A vehicle is provided that connects to an power structure for powering and guiding the vehicle. The power structure includes a trolley, a track along which the trolley runs, a power source connected to the track, and a cable connected to the trolley and configured to attach to the vehicle moving on a surface. The vehicle includes a chassis and a cable connected to the chassis and configured to mechanically and electrically connect the vehicle to the power structure. The chassis includes a connector rotatable 360 degrees, and the cable connects to the chassis through the connector.

A vehicle is provided that connects to an power structure for powering and guiding the vehicle. The power structure includes a trolley, a track along which the trolley runs, a power source connected to the track, and a cable connected to the trolley and configured to attach to the vehicle moving on a surface. The vehicle includes a chassis and a cable connected to the chassis and configured to mechanically and electrically connect the vehicle to the power structure. The chassis includes a connector rotatable 360 degrees, and the cable connects to the chassis through the connector.

A three-rail power supply system includes a power supply having positive, negative, and neutral terminals, a rail system having a power supply end and a termination end, and an asymmetric resistor network. The rail system includes a positive rail, a negative rail, and a ground rail coupled to the positive terminal, the negative terminal, and the neutral terminal, respectively. The negative rail is disposed parallel to the positive rail. The ground rail is disposed in parallel to, and between, the positive rail and the negative rail, and is electrically grounded at a plurality of intervals between the power supply end and termination end. The asymmetric resistor network includes two pairs of resistors asymmetrically coupled to the rail system at the power supply end and termination end, and is configured to limit a fault current through a faulty connection in response the positive, negative, and/or ground rails experiencing the faulty connection.

A three-rail power supply system includes a power supply having positive, negative, and neutral terminals, a rail system having a power supply end and a termination end, and an asymmetric resistor network. The rail system includes a positive rail, a negative rail, and a ground rail coupled to the positive terminal, the negative terminal, and the neutral terminal, respectively. The negative rail is disposed parallel to the positive rail. The ground rail is disposed in parallel to, and between, the positive rail and the negative rail, and is electrically grounded at a plurality of intervals between the power supply end and termination end. The asymmetric resistor network includes two pairs of resistors asymmetrically coupled to the rail system at the power supply end and termination end, and is configured to limit a fault current through a faulty connection in response the positive, negative, and/or ground rails experiencing the faulty connection.

A vehicle power supply system includes a control contactor and at least first and second power contactors along a top side of a vehicle. The first and second power contactors receive different polarities of electrical power from an off-board power supply system to power the vehicle. The control contactor conducts a control signal indicative of whether the first and second power contactors are conductively coupled with the off-board power supply system. The first power contactor receives a positive polarity of the electrical power and the second power contactor receives a negative polarity of the electrical power while the vehicle has a first orientation relative to the off-board power supply system. The first power contactor receives the negative polarity and the second power contactor receives the positive polarity while the vehicle has an opposite, second orientation relative to the off-board power supply system.

A vehicle power supply system includes a control contactor and at least first and second power contactors along a top side of a vehicle. The first and second power contactors receive different polarities of electrical power from an off-board power supply system to power the vehicle. The control contactor conducts a control signal indicative of whether the first and second power contactors are conductively coupled with the off-board power supply system. The first power contactor receives a positive polarity of the electrical power and the second power contactor receives a negative polarity of the electrical power while the vehicle has a first orientation relative to the off-board power supply system. The first power contactor receives the negative polarity and the second power contactor receives the positive polarity while the vehicle has an opposite, second orientation relative to the off-board power supply system.

The disclosure relates to an overhead line system for supplying electricity to the drive of one or more construction machines for piece good or bulk material transport, wherein the overhead line comprises at least one pair of lines which extend parallel along the route, carry current with opposing polarity and which can be electrically contacted by corresponding current collectors of the construction machines, characterized in that each line is provided at the end with at least one guide forming a feed channel for receiving the head of the current collector, the feed channel converging in the direction of the associated line.

The disclosure relates to an overhead line system for supplying electricity to the drive of one or more construction machines for piece good or bulk material transport, wherein the overhead line comprises at least one pair of lines which extend parallel along the route, carry current with opposing polarity and which can be electrically contacted by corresponding current collectors of the construction machines, characterized in that each line is provided at the end with at least one guide forming a feed channel for receiving the head of the current collector, the feed channel converging in the direction of the associated line.