JP2021036745A - switchboard - Google Patents

Abstract

To provide a switchboard capable of reducing an excessive temperature rise inside the switchboard due to heating of the switchboard and a conductor without additionally disposing a cooling mechanism, such as a cooling fan.SOLUTION: A switchboard 100 includes a first power supply path 11 to which one of two-phase AC powder is supplied and which includes a first conductor 41 formed in a plate shape, and a second power supply path 12 to which the other of the two-phase AC power is supplied and which includes a second conductor 42 formed in a plate shape. At least a part of the first conductor 41 and a part of the second conductor 42 are covered with an insulation member 55, and both are spacedly arranged so as to be opposed to each other in the neighborhood.SELECTED DRAWING: Figure 8

Description

The present invention relates to a switchboard, and more particularly to a switchboard for supplying AC power to a load.

Conventionally, a switchboard for supplying AC power to a load has been disclosed (see, for example, Patent Document 1).

Patent Document 1 describes a switchboard for supplying three-phase AC power to a load. In the switchboard described in Patent Document 1, conductors such as a circuit breaker unit (switch) and a horizontal bus (bus bar) are housed inside. In the switchboard described in Patent Document 1, three horizontal bus lines are provided so as to correspond to three phases.

Japanese Patent No. 6203462

Here, although not described in Patent Document 1, in a conventional switchboard as described in Patent Document 1, a high-voltage and high-frequency current may flow through a conductor that supplies AC power to a load. It is common. When a high-voltage current flows through a conductor, the magnetic flux generated by the current flowing through the conductor increases. Therefore, the magnetic flux generated by the current flowing through the conductor may heat a portion (for example, a frame constituting the housing) arranged in the vicinity of the conductor of the switchboard. Further, when a high-frequency current flows through the conductor, a skin effect occurs in which the current concentrates and flows on the surface of the conductor. Therefore, the skin effect increases the substantial resistance of the current flowing through the conductor, which may heat the conductor itself. Therefore, in the conventional switchboard as described in Patent Document 1, a cooling mechanism such as a cooling fan is separately provided in order to suppress an excessive temperature rise inside the switchboard due to the heating of the switchboard and the conductor. There is a problem that it needs to be provided.

The present invention has been made to solve the above problems, and one object of the present invention is that the switchboard and the conductor are heated without providing a cooling mechanism such as a cooling fan. It is an object of the present invention to provide a switchboard capable of suppressing an excessive temperature rise inside the switchboard.

In order to achieve the above object, the switchboard according to one aspect of the present invention is a switchboard for supplying two-phase AC power to a load, and has a power supply path connecting the AC power supply and the load. A switch provided in the power supply path for opening and closing the power supply path, and the power supply path includes a first conductor formed in a plate shape to which one of two phases of AC power is supplied. It includes one power supply path and a second power supply path including a second conductor formed in a plate shape to which the other of the two-phase AC power is supplied, and at least one of each of the first conductor and the second conductor. Both portions are covered with an insulating member and are arranged so as to face each other in a state of being separated from each other.

In the switchboard according to one aspect of the present invention, as described above, at least a part of each of the first conductor and the second conductor is arranged so as to face each other in a state of being separated from each other. Here, the first power supply path to which one of the two-phase AC power is supplied and the second power supply path to which the other of the two-phase AC power is supplied flow currents in opposite directions to each other. When the first conductor of the 1 power supply path and the second conductor of the second power supply path are arranged so as to face each other in the vicinity of each other, the magnetic flux generated by the current flowing in the first conductor and the magnetic flux flowing in the second conductor. The magnetic flux generated by the electric current is generated in a direction in which they cancel each other out. As a result, in the portion where the first conductor and the second conductor are arranged so as to face each other in the vicinity, the magnetic flux generated by the current flowing through the first conductor and the magnetic flux generated by the current flowing through the second conductor cancel each other out. Therefore, the magnetic flux generated by the current flowing through the first conductor and the magnetic flux generated by the current flowing through the second conductor can be reduced. Therefore, the magnetic flux generated by the current flowing through the first conductor and the second conductor heats the portion of the switchboard arranged in the vicinity of the first conductor and the second conductor (for example, the frame constituting the housing). Can be suppressed. Further, since the magnitude of the skin effect depends on the magnitude of the magnetic flux, the magnetic flux itself generated by the current flowing through the first conductor and the magnetic flux itself generated by the current flowing through the second conductor can be reduced to reduce the magnetic flux itself generated by the first conductor and the first conductor. The skin effect of each of the second conductors is reduced, and it is possible to suppress the heating of the first conductor itself and the second conductor itself by the skin effect. As a result, it is possible to suppress an excessive temperature rise inside the switchboard due to heating of the switchboard or the conductor without separately providing a cooling mechanism such as a cooling fan. Further, since each part of the first conductor and the second conductor, which are arranged so as to face each other in a state of being separated from each other, are covered with an insulating member, the first conductor and the second conductor can be separated from each other. Even when they are arranged so as to face each other in the vicinity, insulation between the first conductor and the second conductor can be easily ensured.

In the power distribution board according to the above one aspect, preferably, at least a part of each of the first conductor and the second conductor is covered with an insulating member, and at least with the first conductor in a state of being covered with the insulating member. Insulation between the second conductor is ensured, and the magnetic flux generated by the current flowing through the first conductor and the magnetic flux generated by the current flowing through the second conductor cancel each other out, so that they face each other in a state of being separated from each other. It is arranged to do. With this configuration, the insulation between the first conductor and the second conductor is surely secured in the portion where the first conductor and the second conductor are arranged so as to face each other in the vicinity while being separated from each other. At the same time, the magnetic flux generated by the current flowing through the first conductor and the magnetic flux generated by the current flowing through the second conductor can be reliably canceled each other.

In this case, preferably, at least a part of each of the first conductor and the second conductor is covered with an insulating member, and the thickness of the first conductor or the thickness of the second conductor formed in a plate shape. They are arranged so as to face each other with a distance larger than either of them and smaller than either the width of the first conductor or the width of the second conductor. With this configuration, the first conductor and the second conductor are arranged so as to face each other at a distance larger than either the thickness of the first conductor or the thickness of the second conductor formed in a plate shape. By doing so, it is possible to prevent the first conductor and the second conductor from being placed too close to each other, and either the width of the first conductor or the width of the second conductor formed in a plate shape. By arranging the first conductor and the second conductor so as to face each other with a distance smaller than the above, it is possible to prevent the first conductor and the second conductor from being arranged too far apart. As a result, in the portion where the first conductor and the second conductor are arranged so as to face each other in a state of being separated from each other, the insulation between the first conductor and the second conductor is surely secured and the first conductor is second. It is possible to easily realize a configuration in which the magnetic flux generated by the current flowing through the first conductor and the magnetic flux generated by the current flowing through the second conductor are surely canceling each other out.

The insulation between the first conductor and the second conductor in the state of being covered with the insulating member is ensured, and the magnetic flux generated by the current flowing through the first conductor and the magnetic flux generated by the current flowing through the second conductor are mutually exclusive. In a configuration in which they are arranged so as to cancel each other out, preferably, a plurality of power supply paths are provided, and at least a part of each of the first conductor and the second conductor is covered with an insulating member. , They are arranged so as to face each other with a distance smaller than the distance between the power supply paths of the plurality of systems. With this configuration, the first conductor and the second conductor are arranged so as to face each other at a distance smaller than the distance between the power supply paths of the plurality of systems, so that the first conductor and the second conductor are opposed to each other. It is possible to prevent the and from being arranged too far apart. As a result, in the portion where the first conductor and the second conductor are arranged so as to face each other in a state of being separated from each other, the magnetic flux generated by the current flowing through the first conductor and the current flowing through the second conductor generate the magnetic flux. It is possible to easily realize a configuration in which the magnetic fluxes reliably cancel each other out.

In the switchboard according to the above one aspect, preferably, the housing in which the power supply path and the switch are housed is covered with an insulating member and is arranged so as to face each other in a state of being separated from each other. A fixing member for fixing at least a part of each of the conductor and the second conductor to the housing is further provided. With this configuration, in at least a part of each of the first conductor and the second conductor covered with the insulating member, the first conductor and the insulating member with which the insulating member is integrated are integrated by the fixing member. The second conductor can be fixed to the housing. As a result, for example, the first conductor, the second conductor, and the insulating member are fixed to the housing as compared with the case where the first conductor, the second conductor, and the insulating member are separately fixed to the housing. It is possible to reduce the number of fixed points for this purpose.

In this case, preferably, a plurality of the first conductor and the second conductor are provided, and the plurality of first conductors are connected to each other by portions not covered by the insulating member, and the plurality of second conductors are connected to each other. Are connected to each other by portions that are not covered by the insulating member, and are each of the first conductor and the second conductor that are covered with the insulating member and are arranged so as to face each other in the vicinity while being separated from each other. At least a part thereof is separated from the housing so as to ensure insulation between the portion not covered by the insulating member of the first conductor and the portion not covered by the insulating member of the second conductor and the housing. It is fixed to the housing by a fixing member. With this configuration, it is possible to reliably secure insulation between the housing and the portion not covered by the insulating member of the first conductor and the portion not covered by the insulating member of the second conductor.

In the switchboard according to the above one aspect, preferably, the first power supply path and the second power supply path further include a cable connected to the load on the load side of the switch, respectively, and the first conductor and the second power supply path. Each conductor includes a portion that is not covered by an insulating member and includes a cable connection that is connected to a cable, and the cable connection of the first conductor and the cable connection of the second conductor are at least not covered by the insulating member. They are arranged apart from each other so that insulation between the first and second conductors of the state is ensured. With this configuration, it is possible to reliably secure the insulation between the first conductor and the second conductor at the cable connecting portion that includes the portion that is not covered by the insulating member and is connected to the cable.

According to the present invention, as described above, it is possible to suppress an excessive temperature rise inside the switchboard due to heating of the frame of the switchboard and the conductor itself without providing a cooling mechanism such as a cooling fan. ..

It is a circuit diagram of the switchboard according to one Embodiment of this invention. It is a front view of the switchboard by one Embodiment of this invention. It is sectional drawing along the line 200-200 of FIG. It is sectional drawing along the line 300-300 of FIG. It is a figure which showed the part which the 1st conductor and the 2nd conductor of the switchboard by one Embodiment of this invention are arranged so that they face each other in a state which are separated from each other. FIG. 5 is a cross-sectional view taken along the line 400-400 of FIG. FIG. 5 is a cross-sectional view taken along the line 500-500 of FIG. It is a schematic diagram for demonstrating the magnetic flux generated by the current flowing through a 1st conductor, and the magnetic flux generated by a current flowing through a 2nd conductor.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

The configuration of the switchboard 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 8. The switchboard 100 is a switchboard for supplying two-phase (U-phase and V-phase) AC power to the load 110 (see FIG. 1).

As shown in FIG. 1, the switchboard 100 includes a power supply path 10 and a switch 20. The power supply path 10 is an electric circuit that connects an AC power source (not shown) and a load 110. The power supply path 10 is configured so that a high-voltage and high-frequency current flows. In the switchboard 100, the power supply path 10 is provided with a plurality of systems (two systems) of A system and B system. The switch 20 is provided in the power supply path 10. The switch 20 is a device for opening and closing the power supply path 10. The switch 20 is provided in each of the power supply path 10a of the A system and the power supply path 10b of the B system.

The power supply path 10a of the system A and the power supply path 10b of the system B are connected at a connection point 31 provided on the load 110 side of the switch 20 in the switchboard 100. Then, on the load 110 side of the connection point 31, the power supply path 10a of the A system and the power supply path 10b of the B system are merged. Further, in the switchboard 100, the switch 20a provided in the power supply path 10a of the system A and the switch 20b provided in the power supply path 10b of the system B are in a state in which one is open and the other is in a closed state. It is configured as follows. That is, the switchboard 100 is configured to switch the power supply path 10 for supplying AC power to the load 110 between two systems (A system and B system). In the following description, the power supply path 10 on the load 110 side of the connection point 31 will be the power supply path 10c for convenience of explanation.

The power supply path 10a of the A system and the power supply path 10b of the B system are the first power supply path 11 to which one of the two-phase AC power (U phase) is supplied and the other of the two-phase AC power (U-phase), respectively. Includes a second power supply path 12 to which the V phase) is supplied. The switch 20 is provided in each of the first power supply path 11 and the second power supply path 12. In the same system (for example, between systems A), a switch 20 (first switch 21) provided in the first power supply path 11 and a switch 20 (second switch 20) provided in the second power supply path 12. The switch 22) is configured to open and close the power supply path 10 substantially at the same time.

As shown in FIG. 2, the switchboard 100 includes a metal housing 32 in which a power supply path 10 and a switch 20 are housed. The housing 32 has a substantially rectangular parallelepiped shape. In the following description, the vertical direction, the horizontal direction, and the front-rear direction of the housing 32 are the Z direction, the X direction, and the Y direction, respectively. Further, the upper side, the lower side, the left side, the right side, the front side (front side) and the rear side (rear side) of the housing 32 are the Z1 side, the Z2 side, the X1 side, the X2 side, the Y1 side and the Y2 side, respectively. ..

The switch 20 is provided at the lower part inside the housing 32. In the switchboard 100, the switch 20a provided in the power supply path 10a of the A system is arranged on the front side (Y1 side) inside the housing 32. Further, although not shown in FIG. 2, the switch 20b (see FIG. 1) provided in the power supply path 10b (see FIG. 1) of the B system is located on the back side (Y2 side) inside the housing 32. Is located in.

The power supply path 10a of the system A is arranged so as to extend in the X2 direction from the switch 20a and then bend approximately 90 degrees in the Z1 direction in the vicinity of the side surface 32a on the X2 side of the housing 32. Similarly, although not shown in FIG. 2, the power supply path 10b (see FIG. 1) of the B system extends from the switch 20b (see FIG. 1) in the X2 direction, and then extends to the X2 side of the housing 32. It is arranged so as to bend approximately 90 degrees in the Z1 direction in the vicinity of the side surface 32a of the above. As shown in FIG. 3, the power supply path 10a of the system A and the power supply path 10b of the system B are each bent by approximately 90 degrees in the Z1 direction in the vicinity of the side surface 32a on the X2 side of the housing 32, and then the housing. It is arranged so as to extend in the Z1 direction toward the upper part of the 32.

As shown in FIG. 4, the connection point 31 to which the power supply path 10a of the system A (see FIG. 3) and the power supply path 10b of the system B (see FIG. 3) are connected is a switch 20a (see FIG. 1). The switch 20b (see FIG. 1) is arranged on the X1 side and in the vicinity of the side surface 32b on the X1 side of the housing 32. Further, the connection point 31 is arranged so as to extend in the Y direction. Then, as shown in FIG. 2, the power supply path 10c on the load 110 side of the connection point 31 is arranged so as to extend in the Z1 direction after being bent by approximately 90 degrees in the Z1 direction at the connection point 31.

As shown in FIGS. 2 to 4, in the switchboard 100, most of the power supply path 10 except for the cable 45, which will be described later, is formed in a plate shape (so-called a bus bar). .. That is, the first power supply path 11 and the second power supply path 12 include the first conductor 41 (see FIG. 6) and the second conductor 42 (see FIG. 6) formed in a plate shape, respectively.

As shown in FIG. 5, in the switchboard 100, the first power supply path 11 and the second power supply path 12 are each composed of a plurality of members (bus bars). Then, in the first power supply path 11 and the second power supply path 12, a plurality of members (bus bars) are connected at the fastening position P by the fastening member 50. In the following description, the longitudinal direction, the lateral direction (width direction), and the thickness direction of the first power supply path 11 and the second power supply path 12 are the A direction, the B direction, and the C direction, respectively. Further, in the C direction, the first power supply path 11 side and the second power supply path 12 side are the C1 side and the C2 side, respectively.

Here, as shown in FIG. 6, in the present embodiment, at least a part of each of the first conductor 41 and the second conductor 42 is covered with the insulating member 55 and is close to each other in a state of being separated from each other. It is arranged so as to face each other. Specifically, at least a part of each of the first conductor 41 and the second conductor 42 is covered with the insulating member 55, and at least the first conductor 41 and the second conductor in the state of being covered with the insulating member 55. Insulation between the conductor 42 is ensured, and the magnetic flux Φ _{41 generated by the current I 41} flowing through the first conductor 41 and the magnetic flux Φ _{42 generated by the current I 42} flowing through the second conductor 42 cancel each other out. , They are arranged so as to face each other in the vicinity while being separated from each other.

Specifically, the first conductor 41 and the second conductor 42 each have a thickness t1. The first conductor 41 and the second conductor 42 include a portion covered with an insulating member 55 (so that the outer circumference is surrounded when viewed from the A direction). The insulating member 55 is, for example, a film having an insulating property such as PET (PolyEthylene terephthalate). The insulating member 55 has a thickness t2. The first conductor 41 and the second conductor 42, which are covered with the insulating member 55, are arranged so as to face each other with a distance D1. In the switchboard 100, the distance D1 is a distance larger than the thickness t1 of the first conductor 41 and the thickness t1 of the second conductor 42. Further, the distance D1 is a distance smaller than the width W1 of the first conductor 41 and the width W1 of the second conductor 42. Further, as shown in FIG. 3, the distance D1 is smaller than the distance D2 between the power supply path 10a of the A system and the power supply path 10b of the B system. The distance D1 is set based on the insulation distance between the first conductor 41 and the second conductor 42 in a state of being covered with the insulating member 55.

As shown in FIG. 8, the first power supply path 11 to which one of the two-phase AC power (U phase) is supplied and the second power supply path to which the other (V phase) of the two-phase AC power is supplied. Currents flowing in opposite directions to 12 flow. Therefore, the magnetic flux Φ _{41 generated by the current I 41} flowing through the first conductor 41 of the first power supply path 11 and the magnetic flux Φ _{42 generated by the current I 42} flowing through the second conductor 42 of the second power supply path 12. , Occurs in the direction of canceling each other.

As shown in FIG. 7, a plurality of the first conductor 41 and the second conductor 42 are provided. Each of the plurality of first conductors 41 is not covered by the insulating member 55 (the outer circumference is not surrounded when viewed from the B direction, and the outer circumference is not surrounded when viewed from the A direction, although not shown in FIG. 7). Includes 60. The plurality of first conductors 41 are connected to each other by fastening members 50 at portions 60 that are not covered by the insulating member 55. Further, each of the plurality of second conductors 42 is not covered by the insulating member 55 (the outer circumference is not surrounded when viewed from the B direction, and although not shown in FIG. 7, the outer circumference is surrounded when viewed from the A direction). Not included). The plurality of second conductors 42 are connected to each other by fastening members 50 at portions 60 that are not covered by the insulating member 55.

In the present embodiment, as shown in FIGS. 2 and 3, the switchboard 100 is covered with an insulating member 55 (see FIG. 6) and is arranged so as to face each other in a state of being separated from each other. A fixing member 65 for fixing at least a part of each of the conductor 41 (see FIG. 6) and the second conductor 42 (see FIG. 6) to the housing 32 is provided. Then, at least a part of each of the first conductor 41 and the second conductor 42, which are covered with the insulating member 55 and arranged so as to face each other in the vicinity while being separated from each other, is the insulating member of the first conductor 41. The housing 32 is provided with insulation between the portion 60 not covered by the 55 (see FIG. 7) and the portion 60 not covered by the insulating member 55 of the second conductor 42 (see FIG. 7) and the housing 32. It is fixed to the housing 32 by the fixing member 65 in a state of being separated from each other.

Specifically, as shown in FIG. 5, a protrusion 66 is provided on the surface of the first power supply path 11 opposite to the second power supply path 12 (C1 side). Further, although not shown in FIG. 5, a protrusion 66 is also provided on a surface of the second power supply path 12 opposite to the first power supply path 11 (C2 side). Then, as shown in FIGS. 2 and 3, the first power supply path 11 and the second power supply path 12 are fixed to the housing 32 by the fixing member 65 fastened to the protrusion 66 and the housing 32. Has been done. As shown in FIG. 2, each of the first power supply path 11 (first conductor 41) and the second power supply path 12 (second conductor 42) extends in the Z direction (side surface of the housing 32 on the X2 side). In the portion (the portion arranged in the vicinity of 32a), the housing 32 is arranged so as to be separated from the side surface 32a on the X2 side by a distance D3. The distance D3 includes each of the first conductor 41 and the second conductor 42 in a state where each of the first conductor 41 and the second conductor 42 is not covered with the insulating member 55, and the side surface 32a on the X2 side of the housing 32. It is set based on the insulation distance of.

As shown in FIG. 2, in the present embodiment, the first power supply path 11 and the second power supply path 12 each include a cable 45 connected to the load 110 on the load 110 side of the switch 20. Further, the first conductor 41 and the second conductor 42 each include a portion 60 not covered by the insulating member 55 and a cable connecting portion 80 connected to the cable 45. Specifically, in the power supply path 10c, the cable connection portion 80 is arranged at a position separated from the connection point 31 in the Z1 direction by a distance D5. Since the portion of the cable connecting portion 80 connected to the cable 45 is fastened and connected to the terminal portion of the cable 45 by a conductive fastening member such as a bolt, the Z1 side connected to the terminal portion of the cable 45 is connected. The portion 80a is not covered by the insulating member 55. Therefore, in the present embodiment, the cable connection portion 80 of the first conductor 41 and the cable connection portion 80 of the second conductor 42 are between the first conductor 41 and the second conductor 42 in a state where they are not covered by the insulating member 55. They are arranged apart from each other so that the insulation in the above is ensured.

(Effect of embodiment)
In this embodiment, the following effects can be obtained.

In the present embodiment, as described above, at least a part of each of the first conductor 41 and the second conductor 42 is arranged so as to face each other in a state of being separated from each other. As a result, in the portion where the first conductor 41 and the second conductor 42 are arranged so as to face each other in the vicinity, the magnetic flux Φ _{41 generated by the current I 41} flowing in the first conductor 41 and the current flowing in the second conductor 42 since the magnetic flux [Phi ₄₂ generated by I ₄₂ cancel each other, reducing the magnetic flux [Phi ₄₁ generated by the current _{I 42} flowing in the magnetic flux [Phi ₄₁ and the second conductor 42 generated by a current _{I 41} flowing in the first conductor 41 Can be done. Therefore, due to the magnetic flux generated by the current flowing through the first conductor 41 and the second conductor 42, a portion of the switchboard 100 arranged in the vicinity of the first conductor 41 and the second conductor 42 (for example, the side surface 32a of the housing 32). Can be suppressed from being heated. Further, since the magnitude of the skin effect depends on the magnitude of the magnetic flux, the magnetic flux Φ _{41 itself generated by the current I 41} flowing through the first conductor 41 and the magnetic flux Φ ₄₁ itself _{generated by the current I 42} flowing through the second conductor 42. By reducing the size, the skin effect of each of the first conductor 41 and the second conductor 42 becomes smaller, and it is possible to suppress the heating of the first conductor 41 itself and the second conductor 42 itself due to the skin effect. As a result, it is possible to suppress an excessive temperature rise inside the switchboard 100 due to heating of the switchboard 100 and the conductor without separately providing a cooling mechanism such as a cooling fan. Further, since each portion of the first conductor 41 and the second conductor 42, which are arranged so as to face each other in a state of being separated from each other, are both covered with the insulating member 55, the first conductor 41 and the second conductor 41 are the first. Even when the two conductors 42 are arranged so as to face each other in the vicinity, the insulation between the first conductor 41 and the second conductor 42 can be easily ensured.

Further, in the present embodiment, as described above, at least a part of each of the first conductor 41 and the second conductor 42 is covered with the insulating member 55, and at least the first conductor 55 is covered with the insulating member 55. Insulation between the 1st conductor 41 and the 2nd conductor 42 is ensured, and the magnetic flux Φ _{41 generated by the current I 41} flowing through the 1st conductor 41 and the magnetic flux Φ _{42 generated by the current I 42} flowing through the 2nd conductor 42. Are arranged so as to be opposed to each other in a state of being separated from each other so that they cancel each other out. As a result, in the portion where the first conductor 41 and the second conductor 42 are arranged so as to face each other in a state of being separated from each other, the insulation between the first conductor 41 and the second conductor 42 is surely secured. At the same time, the magnetic flux Φ _{41 generated by the current I 41} flowing through the first conductor 41 and the magnetic flux Φ _{42 generated by the current I 42} flowing through the second conductor 42 can be reliably canceled each other.

Further, in the present embodiment, as described above, at least a part of each of the first conductor 41 and the second conductor 42 is covered with the insulating member 55, and the plate-shaped first conductor 41 is formed. They are arranged so as to face each other with a distance D1 larger than the thickness t1 and the thickness t1 of the second conductor 42 and smaller than the width W1 of the first conductor 41 and the width W1 of the second conductor 42. As a result, the first conductor 41 and the second conductor 42 are arranged so as to face each other with a distance D1 larger than the thickness t1 of the first conductor 41 and the thickness t1 of the second conductor 42 formed in a plate shape. By doing so, it is possible to prevent the first conductor 41 and the second conductor 42 from being placed too close to each other, and the width W1 and the second conductor of the first conductor 41 formed in a plate shape. By arranging the first conductor 41 and the second conductor 42 so as to face each other with a distance D1 smaller than the width W1 of 42, it is possible to prevent the first conductor 41 and the second conductor 42 from being arranged too far apart. As a result, in the portion where the first conductor 41 and the second conductor 42 are arranged so as to face each other in a state of being separated from each other, the insulation between the first conductor 41 and the second conductor 42 is surely secured. At the same time, it is possible to easily realize a configuration in which the magnetic flux Φ _{41 generated by the current I 41} flowing through the first conductor 41 and the magnetic flux Φ _{42 generated by the current I 42} flowing through the second conductor 42 are reliably canceled each other. it can.

Further, in the present embodiment, as described above, the switchboard 100 is provided with a plurality of systems (2 systems) of power supply paths 10. Then, at least a part of each of the first conductor 41 and the second conductor 42 is covered with the insulating member 55, and the power supply paths 10 of the plurality of systems are separated by a distance D1 smaller than the distance D2. Arrange them so that they face each other. As a result, the first conductor 41 and the second conductor 42 are arranged so as to face each other with a distance D1 smaller than the distance D2 between the power supply paths 10 of the plurality of systems. It is possible to prevent the two conductors 42 from being arranged too far apart. As a result, in the portion where the first conductor 41 and the second conductor 42 are arranged so as to face each other in a state of being separated from each other, the _{magnetic flux Φ 41} and the second magnetic flux generated by the _{current I 41 flowing through the first conductor 41} It is possible to easily realize a configuration in which the magnetic flux Φ _{42 generated by the current I 42} flowing through the conductor 42 reliably cancels each other out.

Further, in the present embodiment, as described above, the switchboard 100 faces the housing 32 in which the power supply path 10 and the switch 20 are housed, in the vicinity of the housing 32, which is covered with the insulating member 55 and is separated from each other. It is configured to include a fixing member 65 for fixing at least a part of each of the first conductor 41 and the second conductor 42 arranged so as to be attached to the housing 32. As a result, in at least a part of each of the first conductor 41 and the second conductor 42 covered by the insulating member 55, the first conductor 41 and the insulating member 55 in which the insulating member 55 is integrated by the fixing member 65 are formed. The integrated second conductor 42 can be fixed to the housing 32. As a result, the first conductor 41, the second conductor 42, and the insulating member 55 are compared with the case where the first conductor 41, the second conductor 42, and the insulating member 55 are separately fixed to the housing 32, respectively. It is possible to reduce the number of fixing points for fixing to the housing 32.

Further, in the present embodiment, as described above, a plurality of first conductors 41 and a plurality of second conductors 42 are provided. Further, the plurality of first conductors 41 are connected to each other by the portions 60 not covered by the insulating member 55, and the plurality of second conductors 42 are connected to each other by the portions 60 not covered by the insulating member 55. Configure. Then, at least a part of each of the first conductor 41 and the second conductor 42, which are covered with the insulating member 55 and arranged so as to face each other in a state of being separated from each other, is the insulating member of the first conductor 41. The fixing member 65 is separated from the housing 32 so as to ensure insulation between the portion 60 not covered by the portion 60 and the portion 60 not covered by the insulating member 55 of the second conductor 42 and the housing 32. It is fixed to the housing 32. As a result, the insulation between the housing 32 and the portion 60 not covered by the insulating member 55 of the first conductor 41 and the portion 60 not covered by the insulating member 55 of the second conductor 42 can be reliably ensured. ..

Further, in the present embodiment, as described above, the first power supply path 11 and the second power supply path 12 each include the cable 45 connected to the load 110 on the load 110 side of the switch 20. Configure to. Further, each of the first conductor 41 and the second conductor 42 is configured to include a portion 60 not covered by the insulating member 55 and a cable connecting portion 80 connected to the cable 45. Then, the cable connection portion 80 of the first conductor 41 and the cable connection portion 80 of the second conductor 42 are ensured to be insulated between the first conductor 41 and the second conductor 42 in a state where at least the cable connection portion 80 of the second conductor 42 is not covered by the insulating member 55. Place them apart from each other so that they are. As a result, the insulation between the first conductor 41 and the second conductor 42 can be reliably ensured in the cable connecting portion 80 including the portion 60 not covered by the insulating member 55 and connected to the cable 45.

[Modification example]
The embodiments disclosed this time should be considered as exemplary in all respects and not restrictive. The scope of the present invention is shown not by the description of the above embodiment but by the scope of claims, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

For example, in the above embodiment, the first conductor 41 and the second conductor 42 have the same thickness t1 and the same width W1, but the present invention is not limited to this. In the present invention, the first conductor and the second conductor may be configured to have different thicknesses from each other, or may be configured to have different widths from each other. In this case, at least a part of each of the first conductor and the second conductor is larger than either the thickness of the first conductor or the thickness of the second conductor formed in a plate shape, and the width of the first conductor or the second conductor. They may be arranged so as to face each other with a distance smaller than any one of the widths of the conductors.

Further, in the above embodiment, a plurality of first conductors 41 and a plurality of second conductors 42 are provided, respectively, and the plurality of first conductors 41 are connected to each other by portions 60 not covered by the insulating member 55, and a plurality of first conductors 41 are connected to each other. An example is shown in which the two conductors 42 are connected to each other by the portions 60 not covered by the insulating member 55, but the present invention is not limited to this. In the present invention, the first conductor and the second conductor may be provided one by one.

Further, in the above embodiment, an example in which the cable connecting portion 80 of the first conductor 41 and the cable connecting portion 80 of the second conductor 42 are arranged apart from each other is shown, but the present invention is not limited to this. In the present invention, the cable connection portion of the first conductor and a part of the cable connection portion of the second conductor may be arranged so as to face each other in the vicinity while being separated from each other.

Further, in the above embodiment, an example in which a plurality of systems (two systems) of power supply paths 10 are provided in the switchboard 100 is shown, but the present invention is not limited to this. In the present invention, the switchboard may be provided with only one power supply path or three or more power supply paths.

10 Power supply path 11 1st power supply path 12 2nd power supply path 20 Switch 21 1st switch 22 2nd switch 32 Housing 41 1st conductor 42 2nd conductor 45 Cable 55 Insulation member 60 (1st conductor) The part not covered by the insulating member (of the second conductor), the part not covered by the insulating member (of the second conductor) 65 Fixing member 80 Cable connection part 100 Switchboard 110 Load D1 (The first conductor and the second conductor are separated) Distance D2 (Multiple) Distance between grid power supply paths I ₄₁ (flowing through the first conductor) Current I ₄₂ (flowing through the second conductor) Current t1 (first conductor) thickness, (second conductor) thickness W1 (first conductor) Width, width (of the second conductor) Φ ₄₁ (generated by the current flowing through the first conductor) magnetic flux Φ ₄₂ (generated by the current flowing through the second conductor) magnetic flux

Claims (7)

A switchboard for supplying two-phase AC power to a load.
A power supply path connecting the AC power supply and the load,
A switch provided in the power supply path for opening and closing the power supply path,
With
In the power supply path, one of the two-phase AC power is supplied, and the first power supply path including the first conductor formed in a plate shape and the other of the two-phase AC power are supplied to form a plate shape. Includes a second power supply path, including a second conductor
A switchboard in which at least a part of each of the first conductor and the second conductor is covered with an insulating member and is arranged so as to face each other in a state of being separated from each other. At least a part of each of the first conductor and the second conductor is covered with the insulating member, and at least the first conductor and the second conductor in a state of being covered with the insulating member. Insulation between them is ensured, and the magnetic flux generated by the current flowing through the first conductor and the magnetic flux generated by the current flowing through the second conductor cancel each other out so as to face each other in a state of being separated from each other. The power distribution board according to claim 1, which is arranged. At least a part of each of the first conductor and the second conductor is covered with the insulating member, and either the thickness of the first conductor or the thickness of the second conductor formed in a plate shape. The switchboard according to claim 2, wherein the switchboards are arranged so as to face each other with a distance larger than that of the first conductor and smaller than the width of the first conductor or the width of the second conductor. A plurality of power supply paths are provided, and the power supply path is provided.
At least a part of each of the first conductor and the second conductor is covered with the insulating member, and is separated from each other by a distance smaller than the distance between the power supply paths of the plurality of systems. The switchboard according to claim 2 or 3, which is arranged so as to be used. A housing in which the power supply path and the switch are housed,
For fixing at least a part of each of the first conductor and the second conductor, which are covered with the insulating member and are arranged so as to face each other in the vicinity in a state of being separated from each other, to the housing. With fixing members
The switchboard according to any one of claims 1 to 4, further comprising. A plurality of the first conductor and the second conductor are provided, respectively.
The plurality of first conductors are connected to each other by portions not covered by the insulating member.
The plurality of second conductors are connected to each other by portions not covered by the insulating member.
At least a part of each of the first conductor and the second conductor, which are covered with the insulating member and arranged so as to face each other in a state of being separated from each other, is provided by the insulating member of the first conductor. The fixing member attaches the fixing member to the housing in a state of being separated from the housing so as to ensure insulation between the uncoated portion and the portion of the second conductor that is not covered by the insulating member and the housing. The switchboard according to claim 5, which is fixed to the other. The first power supply path and the second power supply path each further include a cable connected to the load on the load side of the switch.
The first conductor and the second conductor each include a portion not covered by the insulating member and include a cable connection portion connected to the cable.
The cable connection portion of the first conductor and the cable connection portion of the second conductor are ensured to have at least insulation between the first conductor and the second conductor in a state where they are not covered by the insulating member. The switchboard according to any one of claims 1 to 6, which is arranged so as to be separated from each other.

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