High voltage device system of railcar and railcar

1. A high voltage device system for use with a railcar and at least one overhead contact line, the high voltage device system comprising:

a plurality of high voltage devices to which high-voltage electric power from the at least one overhead contact line is supplied;

a plurality of high-voltage cables configured to connect the high voltage devices with one another; and

a joint device to which the high-voltage cables are connected, wherein:

the high-voltage cables respectively each include cable connector portions at tip end portions of the high-voltage cables, each of the cable connector portions including: (i) a base tubular portion configured to cover the high-voltage cable, and (ii) a fit tubular portion extending from the base tubular portion in a direction substantially perpendicular to a longitudinal direction of the high-voltage cable;

the joint device includes joint connector portions, each of which is fitted to the fit tubular portion of the cable connector portion to be connected to the high-voltage cable; and

the joint connector portions of the joint device are four projecting joint connector portions.

2. The high voltage device system of the railcar according to claim 1 , wherein:

the four joint connector portions are two first joint connector portions projecting toward one side in the substantially railcar width direction and two second joint connector portions projecting toward the other side in the substantially railcar width direction;

the first joint connector portions are respectively arranged on front and rear sides in a railcar longitudinal direction; and

the second joint connector portions are respectively arranged on front and rear sides in the railcar longitudinal direction.

3. The high voltage device system of the railcar according to claim 2 , wherein:

the high-voltage cable extending from one of the high voltage devices is connected to one of the first joint connector portions; and

the electric power supplied from the high-voltage cable is supplied to the other first joint connector portion and the two second joint connector portions.

4. The high voltage device system of the railcar according to claim 2 , wherein:

the high voltage device system is applicable to the railcar including a bogie arranged under a floor thereof;

the high voltage devices include a power collector arranged at a substantially center of the bogie and on the roof of the railcar and configured to collect the electric power from the at least one overhead contact line;

the joint device is arranged so as to be located closer to an end portion in the railcar longitudinal direction than the power collector;

the cable connector portion of the high-voltage cable extending from the power collector is connected to one of the first joint connector portions; and

the electric power supplied from the high-voltage cable through the power collector is supplied to the other first joint connector portion and the two second joint connector portions.

5. The high voltage device system of the railcar according to claim 4 , wherein:

the high voltage device system is applicable to the railcar including a plurality of cars;

the cable connector portion of the high-voltage cable extending from the power collector is connected to one of the first joint connector portions; and

the high voltage devices other than the power collector are connected to the other first joint connector portion and the two second joint connector portions; and

at least one of the high voltage devices other than the power collector is arranged under a floor of the car other than the car including the power collector.

6. A high voltage device system for use with a railcar and at least one overhead contact line, the high voltage device system comprising:

a plurality of high voltage devices to inch high-voltage electric power from the at least one overhead contact line is supplied;

a plurality of high-voltage cables configured to connect the high voltage devices with one another; and

a joint device to which the high-voltage cables are connected. wherein:

the high-voltage cables respectively each include cable connector portions at tip end portions of the high-voltage cables, each of the cable connector portions including: (i) a base tubular portion configured to cover the high-voltage cable, and (ii) a fit tubular portion extending from the base tubular portion in a direction substantially perpendicular to a longitudinal direction of the high-voltage cable;

the joint device includes joint connector portions, each of which is fitted to the fit tubular portion of the cable connector portion to be connected to the high-voltage cable;

the joint connector portions of the joint device are two third joint connector portions projecting toward one side in a substantially railcar width direction and one fourth joint connector portion projecting toward the other side in the substantially railcar width direction; and

the third joint connector portions are respectively arranged on front and rear sides in a railcar longitudinal direction.

7. A high voltage device system for use with a railcar and at least one overhead contact line, the high voltage device system comprising:

a plurality of high voltage devices to which high-voltage electric power from the at least one overhead contact line is supplied;

a plurality of high-voltage cables configured to connect the high voltage devices with one another, and

a joint device to which the high-voltage cables are connected, wherein:

the high-voltage cables respectively each include cable connector portions at tip end portions of the high-voltage cables, each of the cable connector portions including: (i) a base tubular portion configured to cover the high-voltage cable, and (ii) a fit tubular portion extending from the base tubular portion in a direction substantially perpendicular to a longitudinal direction of the high-voltage cable;

the joint device includes joint connector portions, each of which is fitted to the fit tubular portion of the cable connector portion to be connected to the high-voltage cable;

each of the cable connector portions further includes a connecting terminal located inside the fit tubular portion and coupled to a cable conductor of the high-voltage cable;

the joint device includes an internal conductor portion exposed from tip ends of the respective joint connector portions;

in a state where the joint connector portions are fitted to the cable connector portions, the connecting terminals of the cable connector portions are electrically connected to the internal conductor portion at the joint connector portions; and

a work opening portion for connecting the connecting terminal and the internal conductor portion is formed at one side of the fit tubular portion of the cable connector portion, said one side is opposite to a portion in which the joint connector portion is accommodated.

8. The high voltage device system of the railcar according to claim 7 , wherein the cable connector portion includes an insulating plug configured to close the work opening portion.

9. A railcar for use with at least one overhead contact line, the railcar comprising:

high voltage devices that are a power collector configured to collect high-voltage electric power from the at least one overhead contact line, a breaker configured to break a circuit when a predetermined current or a current higher than the predetermined current from the power collector flows therethrough, and a transformer configured to transform a voltage of the current having flowed through the breaker;

a plurality of high-voltage cables configured to connect the high voltage devices with one another; and

a joint device to which the respective high-voltage cables are connected, wherein:

the high-voltage cables respectively include cable connector portions at tip end portions thereof, each of the cable connector portions including a base tubular portion configured to cover the high-voltage cable and a fit tubular portion extending from the base tubular portion in a direction substantially perpendicular to a longitudinal direction of the high-voltage cable;

the joint device includes joint connector portions, each of which is fitted to the fit tubular portion of the cable connector portion to be connected to the high-voltage cable; and

the joint connector portions of the joint device are four projecting joint connector portions.

10. A railcar for use with at least one overhead contact line, the railcar comprising:

high voltage devices that are a power collector configured to collect high-voltage electric power from the at least one overhead contact line, a breaker configured to break a circuit when a predetermined current or a current higher than the predetermined current from the power collector flows therethrough, and a transformer configured to transform a voltage of the current having flowed through the breaker;

a plurality of high-voltage cables configured to connect the high voltage devices with one another; and

a joint device to which the respective high-voltage cables are connected, wherein:

the high-voltage cables respectively include cable connector portions at tip end portions thereof, each of the cable connector portions including a base tubular portion configured to cover the high-voltage cable and a fit tubular portion extending from the base tubular portion in a direction substantially perpendicular to a longitudinal direction of the high-voltage cable;

the joint device includes joint connector portions, each of which is fitted to the fit tubular portion of the cable connector portion to be connected to the high-voltage cable;

the joint connector portions of the joint device are two third joint connector portions projecting toward one side in a substantially railcar width direction and one fourth joint connector portion projecting toward the other side in the substantially railcar width direction; and

the third joint connector portions are respectively arranged on front and rear sides in a railcar longitudinal direction.

11. A railcar for use with at least one overhead contact line, the railcar comprising:

high voltage devices that are a power collector configured to collect high-voltage electric power from the at least one overhead contact line, a breaker configured to break a circuit when a predetermined current or a current higher than the predetermined current from the power collector flows therethrough, and a transformer configured to transform a voltage of the current having flowed through the breaker;

a plurality of high-voltage cables configured to connect the high voltage devices with one another; and

a joint device to which the respective high-voltage cables are connected, wherein:

the high-voltage cables respectively include cable connector portions at tip end portions thereof, each of the cable connector portions including a base tubular portion configured to cover the high-voltage cable and a fit tubular portion extending from the base tubular portion in a direction substantially perpendicular to a longitudinal direction of the high-voltage cable;

the joint device includes joint connector portions, each of which is fitted to the fit tubular portion of the cable connector portion to be connected to the high-voltage cable;

each of the cable connector portions further includes a connecting terminal located inside the fit tubular portion and coupled to a cable conductor of the high-voltage cable;

the joint device includes an internal conductor portion exposed from tip ends of the respective joint connector portions;

in a state where the joint connector portions are fitted to the cable connector portions, the connecting terminals of the cable connector portions are electrically connected to the internal conductor portion at the joint connector portions; and

a work opening portion for connecting the connecting terminal and the internal conductor portion is formed at one side of the fit tubular portion of the cable connector portion, said one side is opposite to a portion in which the joint connector portion is accommodated.