A line supply arrangement for electrically powered motor vehicles includes an electric line on a support arm above the motor vehicle. A trolley on the support arm positions the electric line such that a free end thereof hangs down from the trolley for connection to the motor vehicle and charging of an energy store. The trolley is movable relative to the support arm in horizontal direction or the support arm is movable and the trolley relative to the support arm in horizontal direction. Arranged on the trolley is a line reel to lower the free end of the electric line to the motor vehicle, and a hose reel is fixed on the support arm for supply and discharge of cooling liquid to and from the electric line. The trolley is movable relative to the hose reel. A heat exchanger is arranged distal to the trolley for cooling the cooling liquid.

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.

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.

A circuit system for a railroad vehicle according to an embodiment includes a power conversion unit, a first converter, a second converter, a power storage unit, and a control unit. The power conversion unit converts power supplied from an overhead wire into power for driving a motor for running mounted on a railroad vehicle. The first converter converts power supplied from the overhead wire into DC power. The second converter converts power output from the first converter into power for driving a load mounted on the railroad vehicle. The power storage unit is electrically connected to an input side of the second converter. The control unit inputs regenerative power output from the power conversion unit to the first converter and inputs power output from the first converter to the power storage unit in a case where it is determined that the railroad vehicle is being regenerated.

A circuit system for a railroad vehicle according to an embodiment includes a power conversion unit, a first converter, a second converter, a power storage unit, and a control unit. The power conversion unit converts power supplied from an overhead wire into power for driving a motor for running mounted on a railroad vehicle. The first converter converts power supplied from the overhead wire into DC power. The second converter converts power output from the first converter into power for driving a load mounted on the railroad vehicle. The power storage unit is electrically connected to an input side of the second converter. The control unit inputs regenerative power output from the power conversion unit to the first converter and inputs power output from the first converter to the power storage unit in a case where it is determined that the railroad vehicle is being regenerated.

Effectively control the temperature of a control unit of a railway equipment inspecting and measuring apparatus, and install the control unit of the railway equipment inspecting and measuring on the roof of the passenger car. The first space is formed between the control unit and the heat insulating case. The second space is formed between the heat insulating case and the cover. In the first space, heat is conducted between the air in the first space and the heat exchange element by the first heat conducting member, and the first fan causes circulation of the air in the first space. In the second space, heat is conducted between the air in the second space and the heat exchange element by the second heat conducting member, and the air inside the second space is diffused by blowing the air from a suction port into the second space with the second fan.

A plate assembly for mounting an electrical enclosure in a position vertically aligned atop an overhead rail used to support a traveling hoist which traverses back and forth along the rails on a trolley. The plate assembly includes a plate which is shaped like an inverted U by a central opening extending up from the bottom with mounting portions projecting normal to the plate which are configured to be attached to the enclosure when installed in the opening at the top and to respective rail pieces clamped against respective sides of the opening.

A station building power supply device includes a circuit breaker to disconnect a connection with a train side, a circuit breaker to disconnect a connection with the station load side, a power converter disposed between the circuit breaker and the circuit breaker to convert the regenerative power into the AC power, a housing that houses the circuit breaker, the power converter, and the circuit breaker, a voltage sensor that detects a charged state of the housing, and a control unit that controls operations of the circuit breaker, of the power converter, and of the circuit breaker based on a detection result from the voltage sensor.

A station building power supply device includes a circuit breaker to disconnect a connection with a train side, a circuit breaker to disconnect a connection with the station load side, a power converter disposed between the circuit breaker and the circuit breaker to convert the regenerative power into the AC power, a housing that houses the circuit breaker, the power converter, and the circuit breaker, a voltage sensor that detects a charged state of the housing, and a control unit that controls operations of the circuit breaker, of the power converter, and of the circuit breaker based on a detection result from the voltage sensor.

An overhead wire mutual separating situation measuring apparatus detects separation of overhead wires with high accuracy in a manner that the overhead wires are placed with a predetermined amount of deviation. A light projecting unit irradiates overhead wires above a railway with a measuring light spreading in a strip shape in the width direction of the railway. Light receiving units receive light reflected by all or a portion of the overhead wires from the measuring light to output a measurement signal indicative of a contour of the overhead wires. Each light receiving unit mutually partially overlaps a measurement area such that the overhead wires within a predetermined measurement area fall within the measurement visual area of at least one light receiving unit. The processing device processes the measurement signal from each light receiving unit to detect a mutual separation of the overhead wires and the positional deviation thereof.