Wiring duct rail and wiring system

Abstract

The present disclosure addresses the problem of providing a wiring duct rail in which the degree of freedom in terms of voltages used is enhanced while electric power loss occurring during conversion to a desired voltage is reduced at a power supply destination. This wiring duct rail (1) comprises three or more conductors, including a reference conductor (110) to which a reference potential is imparted, a first conductor (111) to which a first potential different from the reference potential is imparted, and a second conductor (112) to which a second potential different from either one of the reference potential or the first potential is imparted. A plurality of DC electric powers that are based on the differences between three or more potentials, including the reference potential, the first potential, and the second potential, are supplied to a load device (200) via the three or more conductors.

Description

Wiring duct rails and wiring systems

[0001] The present disclosure relates to a wiring duct rail and a wiring system, and more particularly to a wiring duct rail and a wiring system that supplies DC power to a load device while slidably retaining the load device.

[0002] Patent Document 1 describes a DC duct (wiring duct rail) that slidably holds an adapter (load device) such as a USB socket and supplies DC power to the adapter. The DC duct includes two conductive bars (two linear conductors to which two potentials, a first potential and a second potential opposite in phase to the first potential, are respectively applied) electrically connected to a positive wiring and a negative wiring, and a duct rail (a wiring duct rail main body to which the two conductors are wired and which holds the load device in electrical contact with the two conductors so as to be slidable along the length) having a recess for accommodating the two conductive bars.

[0003] The adapter has two power receiving terminals and a power converter. The two power receiving terminals are electrically connected to two conductive bars of the DC duct when the adapter's fixing ribs are inserted into the recesses of the DC duct. The power converter converts the DC power received by the two power receiving terminals into DC power of a desired voltage. This allows the DC duct to supply DC power of a desired voltage to various electrical devices that operate on DC power, such as smartphones and LED lighting devices, connected to the adapter.

[0004] In the background art, a large power loss occurs when an adapter (load device) converts DC power supplied from a DC duct (wiring duct rail) into DC power of a desired voltage. Also, in the background art, the adapter has limited flexibility in the voltage that can be used.

[0005] Japanese Patent Application Laid-Open No. 2022-86852

[0006] The object of the present disclosure is to provide a wiring duct rail and a wiring system that can increase the degree of freedom in the voltage used while reducing the power loss that occurs when converting DC power to a desired voltage in a load device to which DC power is supplied.

[0007] A wiring duct rail according to one aspect of the present disclosure includes three or more conductors including a reference conductor, a first conductor, and a second conductor. The reference conductor is a conductor to which a reference potential is applied. The first conductor is a conductor to which a first potential is applied. The first potential is a potential different from the reference potential. The second conductor is a conductor to which a second potential is applied. The second potential is a potential different from both the reference potential and the first potential. A load device is supplied with multiple DC powers based on potential differences between three or more potentials including the reference potential, the first potential, and the second potential via the three or more conductors.

[0008] A wiring system according to one aspect of the present disclosure includes the wiring duct rail.

[0009] Fig. 1 is an external view of a wiring system including a wiring duct rail according to an embodiment of the present disclosure. Fig. 2 is a block diagram of the same wiring system. Fig. 3 is a cross-sectional view schematically showing a cross-section of the same wiring duct rail. Fig. 4 is a block diagram of a first modified example of the same wiring system. Fig. 5 is a cross-sectional view schematically showing a cross-section of the wiring duct rail in the first modified example. Fig. 6 is a block diagram of a second modified example of the same wiring system.

[0010] (1) Overview First, an overview of the present disclosure will be described. The present disclosure includes an embodiment (see FIGS. 1 to 3), a first modified example (see FIGS. 4 and 5), and a second modified example (see FIG. 6).

[0011] (1-1) Wiring duct rail The wiring duct rail of the present disclosure, common to the embodiment and the first and second variants, is a wiring duct rail 1 for supplying DC power to a load device 200 while engaging the load device 200 so that the load device 200 can slide along the length direction L1, as shown in FIG.

[0012] Note that the wiring duct rail 1 "for" supplying DC power means that the power supply unit 12 that supplies DC power to the load device 200 is located outside the wiring duct rail 1, and the wiring duct rail 1 simply transmits DC power supplied from the external power supply unit 12 to the load device 200 (see Figures 1 to 6), as well as a case where the wiring duct rail 1 itself is equipped with the power supply unit 12 (not shown).

[0013] (1-2) Load device As shown in Figures 2 and 3, the load device 200 in this embodiment has three built-in terminals (reference terminal 210, first terminal 211, and second terminal 212: hereinafter simply referred to as "210-212") that are connected to three conductors (reference conductor 110, first conductor 111, and second conductor 112: hereinafter simply referred to as "110-112") provided on the duct rail main body 10.

[0014] As shown in FIGS. 4 to 6, the load device 200 in the first and second modified examples further incorporates a third terminal 213 to a third conductor 113 further provided on the duct rail main body 10.

[0015] The load device 200 is fastened to the duct rail main body 10 with three or more terminals (210-212 or 210-213) electrically connected to three or more conductors (110-112 or 110-113).

[0016] The load device 200 may include electrical appliances that operate on DC power and relay devices that relay DC power to such electrical appliances. The relay devices are, for example, various outlets as shown in FIG. 1 . Examples of the various outlets include USB outlets (DC 5V) and various DC outlets other than USB (DC 48V, DC 24V, etc.; hereinafter simply referred to as "DC outlets"). Examples of the electrical appliances include information devices such as smartphones that have a USB terminal that can be connected to a USB outlet, and lighting fixtures such as LED lighting devices that have a DC terminal that can be connected to a DC outlet.

[0017] 1, the electrical device is detachably connected to the relay device, and the load device 200 is configured by connecting the electrical device to the relay device, but the load device 200 may be, for example, a pre-integrated relay device and electrical device (not shown). Alternatively, the load device 200 may be, for example, an electrical device having three or more terminals (210 to 212 or 210 to 213), a load drive circuit 22, and a load 23 such as an LED (i.e., an electrical device with built-in terminals), as shown in FIGS.

[0018] Furthermore, the electrical equipment is not limited to information equipment or lighting equipment. The electrical equipment may be any equipment that can be locked to the duct rail main body 10 directly or via a relay device and that operates on DC power supplied via the duct rail main body 10.

[0019] (1-3) Wiring duct rail The wiring duct rail 1 according to this embodiment comprises three conductors (110 to 112), namely, a reference conductor 110, a first conductor 111, and a second conductor 112, and a duct rail main body 10, as shown in FIG.

[0020] (1-3-1) Reference Conductor and Reference Potential The reference conductor 110 is a linear conductor to which a reference potential is applied. The reference potential is a potential that serves as a reference for a DC voltage. The reference potential is a predetermined constant potential (V0), and will be referred to as the "reference potential V0" hereinafter. In this embodiment, the reference potential V0 is usually zero potential (V0 = 0). However, a value other than zero may be set as the reference potential V0.

[0021] (1-3-1a) Linear conductors Linear conductors usually refer to straight lines, but may also be curved, such as arcs. Conductors are usually made of metals such as copper or aluminum, but may also be made of conductive non-metals such as carbon fiber. These points also apply to linear conductors (111 to 113) other than the reference conductor 110.

[0022] (1-3-2) First Conductor and First Potential The first conductor 111 is a linear conductor to which a first potential V1 is applied. The first potential V1 is a potential different from the reference potential V0 (V1≠V0). The first potential V1 is a potential having a positive or negative polarity with respect to the reference potential V0, and has a positive polarity when V0<V1 and a negative polarity when V1<V0.

[0023] (1-3-3) Second Conductor and Second Potential The second conductor 112 is a linear conductor to which a second potential V2 is applied. The second potential V2 is a potential different from both the reference potential V0 and the first potential V1 (V2 ≠ V0 and V2 ≠ V1). The second potential V2 is a potential having a positive or negative polarity with respect to the reference potential V0 (positive polarity when V0 < V2, negative polarity when V2 < V0).

[0024] (1-3-4) Duct Rail Main Body The duct rail main body 10 is the main body of the wiring duct rail 1. Three or more conductors (110 to 112) including a reference conductor 110, a first conductor 111, and a second conductor 112 are wired in the duct rail main body 10.

[0025] More specifically, the duct rail main body 10 is a hollow, elongated housing made of resin, as shown in Figures 1, 3, and 5. The duct rail main body 10 has a shape that allows the load device 200 to be slidably engaged along the length direction L1 while being in electrical contact with three or more conductors (110-112 or 110-113).

[0026] (1-3-4a) Three or more conductors The three or more conductors (hereinafter simply referred to as "three or more conductors") wired to the duct rail main body 10 are, in the embodiment, three conductors (110 to 112) consisting of a reference conductor 110, a first conductor 111, and a second conductor 112, as shown in Figures 2 and 3.

[0027] In the first and second modified examples, the three or more conductors are, for example, four conductors (110 to 113) obtained by adding a third conductor (113) to the three conductors (110 to 112), as shown in Figures 4 to 6. However, the number of conductors wired to the duct rail main body 10 may be five or more, and any number greater than or equal to three may be used.

[0028] Three or more conductors (110-112 or 110-113) are wired parallel to each other along the longitudinal direction L1 of the duct rail main body 10 on the inner surface of the duct rail main body 10, as shown in Figures 1, 3 and 5, for example.

[0029] The duct rail main body 10 engages the load device 200 so that it can slide along the length direction L1 while being in electrical contact with three or more conductors (110 to 112 or 110 to 113).

[0030] 3 and 5, the duct rail main body 10 has a hollow structure with an open central portion of the underside. With the upper portion 200A of the load device 200 housed in the hollow portion 10A of the duct rail main body 10, a convex portion 200B provided on the periphery of the lower end of the upper portion 200A of the load device 200 and the periphery portion 10B of the underside of the duct rail main body 10 engage with each other, thereby locking the load device 200 to the duct rail main body 10.

[0031] With the load device 200 thus engaged with the duct rail main body 10, three or more terminals (210-212 or 210-213) of the load device 200 are in electrical contact with three or more conductors (110-112 or 110-113) of the duct rail main body 10.

[0032] In the embodiment, the three or more terminals (210 to 212 or 210 to 213) are three terminals (210 to 212) consisting of the reference terminal 210, the first terminal 211, and the second terminal 212, and in the first and second modified examples, these three terminals (210 to 212) plus the third terminal 213 make a total of four terminals (210 to 213).

[0033] The load device 200 attached to the duct rail main body 10 is supplied with multiple DC powers based on potential differences between three or more potentials including a reference potential V0, a ​​first potential V1, and a second potential V2 via three or more conductors (110-112 or 110-113).

[0034] (1-4) Overview of the embodiment In the embodiment, the three or more potentials are three potentials (reference potential V0, first potential V1, and second potential V2) corresponding to three conductors (110 to 112), and two DC powers based on potential differences between the three potentials (V0 to V2) are supplied to the load device 200. The two DC powers are based on the potential difference (V1-V0) of the first potential V1 with respect to the reference potential V0, and the potential difference (V2-V0) of the second potential V2 with respect to the reference potential V0.

[0035] In other words, the two DC powers are DC power based on a first voltage ΔV1 (e.g., ΔV1=V1-V0), which is the potential difference between the reference potential V0 and the first potential V1, and DC power based on a second voltage ΔV2 (e.g., ΔV2=V2-V0), which is the potential difference between the reference potential V0 and the second potential V2.

[0036] In this embodiment, the two DC powers are supplied to the load device 200 from a power supply unit 12 constituting a wiring system 100 (described later) via three conductors (110 to 112) of the wiring duct rail 1.

[0037] However, in addition to the two DC powers based on the two potential differences as described above, three DC powers may be supplied to the load device 200, including another DC power based on, for example, the voltage difference |ΔV2-ΔV1| between the first voltage ΔV1 and the second voltage ΔV2 (in other words, the potential difference |V2-V1| between the first potential V1 and the second potential V2).

[0038] (1-5) Overview of Modifications In the first and second modifications, as shown in Figures 4 to 6, the three or more conductors are four conductors (110 to 113) obtained by adding the third conductor 113 to the three conductors (110 to 112) in the embodiment. Also, the "three or more potentials" in the modifications are four potentials (V0 to V3) obtained by adding the third potential V3 corresponding to the third conductor 113 to the three potentials (V0 to V2) corresponding to the three conductors (110 to 112) in the embodiment.

[0039] In the first modification, as shown in FIG. 4, the wiring duct rail 1 further includes a potential generating unit 13, which generates a third potential V3 (for example, V3 = |V1 - V2|) based on the first potential V1 and the second potential V2. Three DC powers, namely, a first voltage ΔV1 (= V1 - V0), a second voltage ΔV2 (= V2 - V0), and a third voltage ΔV3 (= V3 (-V0)), are supplied from the wiring duct rail 1 to the load device 200.

[0040] The third voltage ΔV3 may be generated, for example, from either the first voltage ΔV1 or the second voltage ΔV2 (in other words, from the reference potential V0 and either the first potential V1 or the second potential V2).

[0041] In the second modification, the wiring duct rail 1 does not include the potential generating unit 13 and simply transmits three DC powers from the power supply unit 12 to the load device 200 .

[0042] In this way, in the first and second modified examples, three DC power sources are supplied from the wiring duct rail 1 to the load device 200 .

[0043] However, the number of DC powers supplied may be four or more. For example, a fourth voltage ΔV4 and a fifth voltage ΔV5 may be further generated based on each of the first voltage ΔV1 and the second voltage ΔV2 and the third voltage ΔV3, and five DC powers, the first voltage ΔV1 to the fifth voltage ΔV5, may be supplied to the load device 200.

[0044] (1-6) Advantages of the Present Disclosure As described above, in the present disclosure, with the load device 200 movably engaged with the duct rail main body 10, the reference potential V0, the first potential V1, and the second potential V2 are respectively applied to the reference conductor 110, the first conductor 111, and the second conductor 112 wired to the duct rail main body 10. This makes it possible to supply a plurality of DC powers with different voltages to the load device 200 via the reference conductor 110, the first conductor 111, and the second conductor 112.

[0045] In this way, by supplying multiple DC powers of different voltages to the load device 200, it is possible to reduce the power loss that occurs during voltage conversion in the load device 200 while improving the freedom of the voltage to be used, compared to when converting from a single voltage to a desired voltage.

[0046] (2) Main Parts of the Embodiment and the First and Second Modifications Next, main parts common to the embodiment and the first and second modifications will be described. Note that, in the following, explanations of matters already mentioned in the "Overview" will be omitted or simplified.

[0047] (2-1) First DC power and second DC power Common to the embodiment and the first and second variants, the load device 200 engaged with the duct rail main body 10 is supplied with first DC power and second DC power via the reference conductor 110 and each of the first conductor 111 and second conductor 112.

[0048] The first DC power is DC power based on a first voltage ΔV1 (=V1−V0), which is a potential difference between a first potential V1 and a reference potential V0. The first DC power is supplied to the load device 200 via the reference conductor 110 and the first conductor 111.

[0049] The second DC power is DC power based on a second voltage ΔV2 (=V2−V0), which is the potential difference between the second potential V2 and the reference potential V0. The second DC power is supplied to the load device 200 via the reference conductor 110 and the second conductor 112.

[0050] In this way, two DC powers, the first voltage ΔV1 and the second voltage ΔV2, can be supplied via the reference conductor 110 and each of the first conductor 111 and the second conductor 112.

[0051] (2-2) Reference Potential and Polarity of First and Second Voltages In the embodiment, the first modified example, and the second modified example, the reference potential V0 is zero potential (V0=0). However, the reference potential V0 may be an appropriate potential other than zero.

[0052] In this embodiment, the first voltage ΔV1 and the second voltage ΔV2 have the same polarity with respect to zero potential (V0 = 0). Having the same polarity means that the first voltage ΔV1 and the second voltage ΔV2 have a relationship such as 0<ΔV1 and 0<ΔV2, or ΔV1<0 and ΔV2<0.

[0053] The first voltage ΔV1 is equal to or greater than twice the second voltage ΔV2 (ΔV2×2≦ΔV1).

[0054] Specifically, the first voltage ΔV1 and the second voltage ΔV2 in the embodiment are, for example, ΔV1 = +48 V and ΔV2 = +5 V, as shown in Figures 2 and 3. However, the first voltage ΔV1 and the second voltage ΔV2 may be, for example, ΔV1 = +48 V and ΔV2 = +24 V, or ΔV1 = +36 V and ΔV2 = +12 V. Alternatively, the first voltage ΔV1 and the second voltage ΔV2 are not limited to a pair of positive values, and may be, for example, a pair of negative values, such as ΔV1 = -48 V and ΔV2 = -5 V.

[0055] This allows the wiring duct rail 1 to supply DC power of two voltages: the first voltage ΔV1 and the second voltage V2, which has the same polarity as the first voltage ΔV1 but an absolute value at least twice as large.

[0056] (2-2-1) Modification of the Polarity of the First Voltage and the Second Voltage In this modification, the first voltage ΔV1 and the second voltage ΔV2 have opposite polarities and the same absolute value (|V1| = |V2|). Having opposite polarities means that the first voltage ΔV1 and the second voltage ΔV2 have a relationship such as 0<ΔV1 and ΔV2<0, or ΔV1<0 and 0<ΔV2.

[0057] Specifically, the first voltage ΔV1 and the second voltage ΔV2 in the first and second modified examples are, for example, ΔV1=+24V and ΔV2=−24V, but may also be ΔV1=+12V and ΔV2=−12V.

[0058] This makes it possible to supply DC power of two voltages, namely, the first voltage ΔV1 and the second voltage ΔV2, which has the same absolute value but is opposite in polarity to the first voltage ΔV1.

[0059] However, the absolute values ​​of the first voltage ΔV1 and the second voltage ΔV2 may be different. Specifically, for example, the first voltage ΔV1 and the second voltage ΔV2 are ΔV1=+24 V and ΔV2=−12 V. In this case, the wiring duct rail 1 can supply DC power of two voltages: the first voltage ΔV1 and the second voltage ΔV2, which has an opposite polarity to the first voltage ΔV1.

[0060] (3) Main parts common to the first and second modified examples Next, main parts common to the first and second modified examples will be described. Note that, in the following, the description of the matters already mentioned in "Embodiment and main parts of the first and second modified examples" will be omitted or simplified.

[0061] (3-1) Predetermined Potential: Third Potential In the first and second modifications, a third potential V3 is applied to the third conductor 113. The third potential V3 is a potential that is different from the reference potential V0, the first potential V1, and the second potential V2 (V3 ≠ V0, V3 ≠ V1, and V3 ≠ V2). The third potential V3 is a potential that has a positive or negative polarity with respect to the reference potential V0 (positive polarity when V0 < V3, negative polarity when V3 < V0).

[0062] Third DC power is further supplied to the load device 200 anchored to the duct rail main body 10 via the reference conductor 110 and the third conductor 113. The third DC power is DC power based on a third voltage ΔV3 (=V3−V0), which is the potential difference between the reference potential V0 and the third potential V3.

[0063] According to the first and second modified examples, it is possible to supply three DC powers, namely, a first voltage ΔV1, a second voltage ΔV2, and a third voltage ΔV3, via the reference conductor 110 and each of the first conductor 111, the second conductor 112, and the third conductor 113.

[0064] (3-2) Third Conductor and Predetermined Potential As shown in FIGS. 4 to 6, the wiring duct rail 1 in the first and second modified examples further includes a linear third conductor 113 to which a predetermined potential is applied.

[0065] A third conductor 113 is further wired to the duct rail main body 10. The duct rail main body 10 engages the load device 200 so that the load device 200 is slidable along the length direction L1 in a state where the load device 200 is in electrical contact with the reference conductor 110, the first conductor 111, the second conductor 112, and also the third conductor 113.

[0066] In the first and second modified examples, the predetermined potential is the third potential V3 which is different from the reference potential V0, the first potential V1 and the second potential V2, as described above.

[0067] However, the predetermined potential may be the reference potential V0, as described in "Modifications of the Predetermined Potential." In other words, the third conductor 113 may be another reference conductor (second reference conductor) separate from the reference conductor 110 (first reference conductor).

[0068] Alternatively, the predetermined potential may be a potential that changes (modulated) according to information (e.g., control information that controls the operation of the load device 200) to the load device 200. That is, the third conductor 113 may be supplied with a potential (e.g., a pulse-width-modulated 3V pulse) that is modulated according to the control information to the load device 200.

[0069] In this way, in the first and second modified examples, by further wiring the third conductor 113 to the duct rail main body 10, it is possible to supply a wider variety of DC power via four or more conductors (110 to 113), thereby improving the versatility of the wiring duct rail 1. Note that, in the first and second modified examples, the third conductor 113 is given a third potential V3 (V3 ≠ V0, V3 ≠ V1, and V3 ≠ V2), but it may also be given a reference potential V0, or a potential that changes depending on information sent to the load device 200.

[0070] (3-2-1) Modification of Predetermined Potential In this modification, the reference conductor 110 is the first reference conductor, and the reference potential V0 is further applied to the third conductor 113, so that the third conductor 113 becomes the second reference conductor.

[0071] The load device 200 engaged with the duct rail main body 10 is supplied with first DC power via the first reference conductor and the first conductor 111, and with second DC power via the second reference conductor and the second conductor 112.

[0072] According to this modification, it is possible to supply two DC powers, the first voltage ΔV1 and the second voltage ΔV2, via the pair of the first reference conductor and the first conductor 111 and the pair of the second reference conductor and the second conductor 112. Compared to the case where two DC powers, the first voltage ΔV1 and the second voltage ΔV2, are supplied via the single reference conductor 110 and each of the first conductor 111 and the second conductor 112, the number of conductors wired to the duct rail main body 10 is four or more, which facilitates the sliding movement of the load device 200.

[0073] (4) Main Parts of the First Modification Next, the main parts of the first modification will be described. Note that, in the following, the description of the matters already mentioned in "Main Parts of the First Modification and the Second Modification" will be omitted or simplified.

[0074] (4-1) Power Supply Unit Three potentials (reference potential V0, first potential V1, and second potential V2) are applied to the three conductors (reference conductor 110, first conductor 111, and second conductor 112) constituting the wiring duct rail 1 of the first modified example from the power supply unit 12 described later, and two DC powers, a first voltage ΔV1 (= V1 - V0) and a second voltage ΔV2 (= V2 - V0), are supplied.

[0075] (4-2) Potential Generator The wiring duct rail 1 in the first modified example further includes a potential generator 13 as shown in Fig. 4. The potential generator 13 is provided in the duct rail main body 10 as shown in Fig. 4 (specifically, for example, it is built into the duct rail main body 10, but it may also be attached externally).

[0076] The potential generating unit 13 generates a third potential V3 based on the reference potential V0 applied to the reference conductor 110, the first potential V1 applied to the first conductor 111, and the second potential V2 applied to the second conductor 112. The potential generating unit 13 then applies the generated third potential V3 to the third conductor 113. The third potential V3 is, for example, the difference between the first potential V1 and the second potential V2 (V3=|V1-V2|), but is not limited to this.

[0077] In this way, in the first variant, the potential generating unit 13 generates the third potential V3 based on three types of potentials, namely the reference potential V0, the first potential V1, and the second potential V2, and applies this to the third conductor 113, thereby making it possible to supply DC power of a wider variety of voltages to the load device 200.

[0078] More specifically, compared to generating the third potential V3 based on two types of potentials, the first potential V1 and the second potential V2, it is possible to reduce the potential difference between the potential to be generated (third potential V3) and the original potentials (reference potential V0, first potential V1, second potential V2). Note that the potential difference here may also be rephrased as the voltage difference between the converted voltage (third voltage ΔV3) and the original voltages (first voltage ΔV1, second voltage ΔV2).

[0079] According to the first variant, the wiring duct rail 1 supplies DC power of a wider variety of voltages to the load device 200, eliminating the need for voltage conversion in the load device 200 and enabling a reduction in power loss that occurs during potential generation (voltage conversion).

[0080] In the first modification, the wiring duct rail 1 is provided with the potential generating unit 13, which makes it possible to supply DC power of various voltages without increasing the number of types (number of voltages) of DC power supplied from the outside, as compared to the second modification. Therefore, for example, the power supply unit 12 in the embodiment can be reused.

[0081] (5) Main Parts of the Second Modification Next, the main parts of the second modification will be described. Note that, in the following, the description of the matters already mentioned in "Main Parts of the First Modification and the Second Modification" will be omitted or simplified.

[0082] Four potentials (reference potential V0, first potential V1, second potential V2, and third potential V3) are applied to the four conductors (reference conductor 110, first conductor 111, second conductor 112, and third conductor 113) that make up the wiring duct rail 1 of the second modified example by the power supply unit 12 described later, and three DC powers, namely, a first voltage ΔV1, a second voltage ΔV2, and a third voltage ΔV3, are supplied.

[0083] In the wiring duct rail 1 of the second modified example, the three DC powers fed from the power feeding section 12 are transmitted to the load device 200 via the four conductors (110 to 113).

[0084] According to the second variant, the wiring duct rail 1 supplies DC power of a wider variety of voltages to the load device 200, eliminating the need for voltage conversion in the load device 200 and enabling a reduction in power loss that occurs during potential generation (voltage conversion).

[0085] In the second modified example, the wiring duct rail 1 does not include the potential generating unit 13, and therefore the configuration of the wiring duct rail 1 can be simplified compared to the first modified example.

[0086] (6) Details Next, the details of the embodiment and the first and second modifications will be described. Note that, in the following, explanations of matters already mentioned in the "Summary" and the like will be omitted or simplified.

[0087] The embodiment and the first and second modified examples of the present disclosure relate to the wiring duct rail 1 and the wiring system 100 including the wiring duct rail 1 as described above.

[0088] (6-1) Wiring System In common with the embodiment and the first and second modifications, the wiring system 100 includes a wiring duct rail 1 and a power supply unit 12, as shown in FIGS. 1, 2, 4, and 6.

[0089] (6-1-1) Power Supply Unit The power supply unit 12 applies a reference potential V0, a ​​first potential V1, and a second potential V2 to the reference conductor 110, the first conductor 111, and the second conductor 112, respectively, which are wired to the duct rail main body 10 that constitutes the wiring duct rail 1. The power supply unit 12 then supplies at least first DC power and second DC power to the load device 200 that is anchored to the duct rail main body 10 via the reference conductor 110, the first conductor 111, and the second conductor 112, respectively.

[0090] In the wiring systems 100 of the first and second modifications, as described above, the third conductor 113 is further wired to the wiring duct rail 1 (duct rail main body 10). The power supply unit 12 supplies first DC power, second DC power, and third DC power to the load device 200 via the reference conductor 110 and each of the first conductor 111, second conductor 112, and third conductor 113.

[0091] As described above, in the wiring systems 100 of the embodiment and the first and second modifications, the power supply unit 12 supplies a plurality of DC powers to the load device 200, which is fastened to the wiring duct rail 1, via three or more conductors (110 to 112) wired to the wiring duct rail 1. By supplying a plurality of DC powers of different voltages to the load device 200 in this manner, the load device 200 can reduce power loss that occurs during voltage conversion and improve the degree of freedom in the voltage to be used, compared to when converting from a single voltage to a desired voltage.

[0092] (6-1-1a) Arrangement of the Power Supply Unit The power supply unit 12 in the embodiment and the first and second modified examples is integrated with the wiring duct rail 1 (duct rail main body 10). More specifically, the power supply unit 12 is attached externally to the wiring duct rail 1 (duct rail main body 10), for example, as shown in FIG.

[0093] 1, the power supply unit 12 is attached to one end of the duct rail main body 10, but the power supply unit 12 may be attached to any position on the duct rail main body 10. The power supply unit 12 may be built into the duct rail main body 10, for example.

[0094] In this way, by integrating the wiring duct rail 1 and the power supply unit 12, it is possible to provide a wiring system 100 that eliminates the need to run three or more connection wires (not shown: described below) from the wiring duct rail 1 (duct rail main body 10) to the power supply unit 12, which is necessary when a separate power supply unit 12 is provided.

[0095] (6-1-1b) Modified Arrangement of Power Supply Unit In this modified example, the power supply unit 12 is separate from the wiring duct rail 1 (duct rail main body 10).

[0096] In this modified example, three or more connection lines (not shown) connected to three or more conductors (110-112) including at least a reference conductor 110, a first conductor 111, and a second conductor 112 are routed from the duct rail main body 10 to a separate power supply unit 12.

[0097] The power supply unit 12 is electrically connected to the three or more connection lines thus routed from the duct rail main body 10. The potential generation unit 13 is also electrically connected to these three or more connection lines.

[0098] In this way, by providing the power supply unit 12 separate from the wiring duct rail 1, it is possible to provide a wiring system 100 that simplifies the wiring duct rail 1 while adding a power supply function.

[0099] (7) Specific Examples Next, specific examples of the embodiment and the first and second modified examples will be described.

[0100] (7-1) Specific Example of Embodiment As shown in Fig. 1, the wiring system 100 in this example includes a wiring duct rail 1 and a power supply unit 12. The power supply unit 12 is integrated with the wiring duct rail 1. Specifically, the power supply unit 12 is externally attached to one of two ends of the wiring duct rail 1 that are perpendicular to the longitudinal direction L1. The wiring system 100 is attached to a ceiling (not shown) via multiple (four in this example) legs 104.

[0101] The above points are common to the specific examples of the first and second modified examples.

[0102] 2 and 3, the wiring duct rail 1 constituting the wiring system 100 in this example includes three conductors (110-112) consisting of a reference conductor 110, a first conductor 111, and a second conductor 112, and a duct rail main body 10 to which the three conductors (110-112) are wired. The duct rail main body 10 locks the load device 200 so that the load device 200 is slidable along the length direction L1 while being in electrical contact with the three conductors (110-112).

[0103] The load device 200 attached to the duct rail main body 10 is supplied with a first DC power based on a first voltage ΔV1, which is the potential difference of a first potential V1 relative to a reference potential V0, and a second DC power based on a second voltage ΔV2, which is the potential difference of a second potential V2 relative to the reference potential V0, via the reference conductor 110 and each of the first conductor 111 and second conductor 112.

[0104] Specifically, the reference potential V0 is zero potential (0 volts: 0V), the first potential V1 is 5 volts (+48V), and the second potential V2 is 5 volts (+5V). Therefore, the first voltage ΔV1 is +48V, and the second voltage ΔV2 is +5V.

[0105] 2, the load device 200 includes three terminals (210 to 212): a reference terminal 210, a first terminal 211, and a second terminal 212, a load drive circuit 22, and a load 23. The load 23 includes an LED and a control circuit (neither of which are shown).

[0106] The power supply unit 12 applies zero potential (0 V), a first potential V1 (+48 V), and a second potential V2 (+5 V), respectively, to three conductors (110-112) wired to the duct rail main body 10. The zero potential (0 V), the first potential V1 (+48 V), and the second potential V2 (+5 V) applied to the three conductors (110-112) are transmitted to a load drive circuit 22 constituting the load device 200 via three terminals (210-212), and the power supply unit 12 supplies a first DC power of a first voltage ΔV1 (+48 V) and a second DC power of a second voltage ΔV2 (+5 V) to the load device 200.

[0107] In the load device 200, a first DC power of +48V is supplied to the LED, and a second DC power of +5V is supplied to the control circuit, so that the LED emits light using the first DC power and the control circuit operates using the second DC power.

[0108] 4 and 5, the wiring duct rail 1 constituting the wiring system 100 in this example includes four conductors (110 to 113) including a reference conductor 110, a first conductor 111, a second conductor 112, and a third conductor 113, a duct rail main body 10 to which the four or more conductors (110 to 112) are wired, and a potential generating unit 13. The duct rail main body 10 holds the load device 200 in a slidable manner along the length direction L1 while the load device 200 is in electrical contact with the four conductors (110 to 113).

[0109] The load device 200 attached to the duct rail main body 10 is supplied with a first DC power based on a first voltage ΔV1, which is the potential difference of the first potential V1 relative to the reference potential V0, a ​​second DC power based on a second voltage ΔV2, which is the potential difference of the second potential V2 relative to the reference potential V0, and a third DC power based on a third voltage ΔV3, which is the potential difference of the third potential V3 relative to the reference potential V0, via the reference conductor 110 and each of the first conductor 111, second conductor 112 and third conductor 113.

[0110] In detail, the reference potential V0 is zero potential (0 volts: 0V), the first potential V1 is 24 volts (+24V), the second potential V2 is -24 volts (-24V), and the third potential V2 is 48 volts (+48V). Therefore, the first voltage ΔV1 is +24V, the second voltage ΔV2 is -24V, and the third voltage ΔV3 is +48V.

[0111] In this example, the load device 200 is composed of a relay device such as a DC outlet, and various electrical devices such as LED lighting devices that can be attached to and detached from the DC outlet. The relay device includes three DC outlets: +24V DC, -24V DC, and +48V DC, and various electrical devices can be attached to any of the three DC outlets.

[0112] 5, the load device 200 includes four terminals (210 to 213) including a reference terminal 210, a first terminal 211, a second terminal 212, and a third terminal 213, a load drive circuit 22, and a load 23. The four terminals (210 to 213) are connected to the three DC outlets. Specifically, the reference terminal 210 and the first terminal 211 are connected to a +24V DC outlet, the reference terminal 210 and the second terminal 212 are connected to a -24V DC outlet, and the reference terminal 210 and the third terminal 213 are connected to a +48V DC outlet. The load 23 is any of the various electrical devices described above.

[0113] Of the above items, the items relating to the load device 200 are also common to the specific example of the second modified example (see FIGS. 6 and 5).

[0114] The power supply unit 12 in this example applies zero potential (0 V), a first potential V1 (+24 V), and a second potential V2 (-24 V) to three conductors (110-112), namely, the reference conductor 110, the first conductor 111, and the second conductor 112, out of the four conductors (110-113) wired to the duct rail main body 10. The zero potential (0 V), the first potential V1 (+24 V), and the second potential V2 (-24 V) applied to the three conductors (110-112) are transmitted to the load drive circuit 22 constituting the load device 200 via three terminals (210-212), namely, the reference terminal 210, the first terminal 211, and the second terminal 212, out of the four terminals (210-213). This enables power supply unit 12 to supply first DC power of first voltage ΔV1 (+24V) and second DC power of second voltage ΔV2 (−24V) to load device 200.

[0115] Furthermore, potential generating unit 13 generates a third potential V3 (+48 V) based on the three potentials (0 V, −24 V, +24 V) applied to the three conductors (110 to 112), and applies the third potential V3 (+48 V) to third conductor 113. Third potential V3 (+48 V) applied to third conductor 113 is transmitted to load driving circuit 22 constituting load device 200 via third terminal 213, thereby enabling power supply unit 12 to further supply third DC power of third voltage ΔV3 (+48 V) to load device 200.

[0116] In the load device 200, for example, when a +24V DC LED lighting device is connected to a +24V DC outlet, a first DC power of +24V DC is supplied from the power supply unit 12 to the LED lighting device, and the LED lighting device emits light using the first DC power. Also, when a +48V DC LED lighting device is connected to a +48V DC outlet, a third DC power of +48V DC is supplied from the power supply unit 12 to the LED lighting device, and the LED lighting device emits light using the third DC power. Furthermore, when a -24V DC electrical device is connected to a -24V DC outlet, a second DC power of -24V DC is supplied from the power supply unit 12 to the electrical device, and the electrical device operates using the second DC power.

[0117] (7-3) Specific Example of Second Modification The wiring duct rail 1 constituting the wiring system 100 in this example includes four conductors (110 to 113) including a reference conductor 110, a first conductor 111, a second conductor 112, and a third conductor 113, and a duct rail main body 10 to which the four or more conductors (110 to 113) are wired, as shown in Figures 6 and 5. In other words, the wiring duct rail 1 in this example has a configuration in which the potential generating unit 13 is removed from the wiring duct rail 1 in the specific example of the first modification (see Figure 4).

[0118] Similar to the first modification, the duct rail main body 10 holds the load device 200 so that the load device 200 is slidable along the length direction L1 while being in electrical contact with the four conductors (110 to 113). Similar to the first modification, the load device 200 held by the duct rail main body 10 is supplied with a first DC power of a first voltage ΔV1 (+24 V), a second DC power of a second voltage ΔV2 (−24 V), and a third DC power of a third voltage ΔV3 (+48 V) via the reference conductor 110 and each of the first conductor 111, second conductor 112, and third conductor 113.

[0119] However, in this example, the power supply unit 12 applies zero potential (0 V), a first potential V1 (+24 V), a second potential V2 (−24 V), and a third potential V3 (48 V) to four conductors (110 to 113) wired to the duct rail main body 10, respectively. The zero potential (0 V), the first potential V1 (+24 V), the second potential V2 (−24 V), and the third potential V3 (+48 V) applied to the four conductors (110 to 113) are transmitted to the load drive circuit 22 constituting the load device 200 via four terminals (210 to 213). This enables the power supply unit 12 to supply the load device 200 with first DC power of the first voltage ΔV1 (+24 V), second DC power of the second voltage ΔV2 (−24 V), and third DC power of the third voltage ΔV3 (+48 V). The subsequent operation of the power supply unit 12 is the same as that in the first modified example.

[0120] (8) Summary The wiring duct rail (1) according to the first aspect of the present disclosure includes three or more conductors (110-112) including a reference conductor (110), a first conductor (111), and a second conductor (112). The reference conductor (110) is a conductor to which a reference potential (V0) is applied. The first conductor (111) is a conductor to which a first potential (V1) is applied. The first potential (V1) is a potential different from the reference potential (V0). The second conductor (112) is a conductor to which a second potential (V2) is applied. The second potential (V2) is a potential different from both the reference potential (V0) and the first potential (V1) (V2 ≠ V1). A load device (200) is supplied with a plurality of DC powers based on potential differences (V1-V0, V2-V0, |V2-V1|) between three or more potentials (V0 to V2) including a reference potential (V0), a first potential (V1), and a second potential (V2) via three or more conductors (110 to 112).

[0121] According to this aspect, a reference potential (V0), a first potential (V1), and a second potential (V2) are respectively applied to the reference conductor (110), the first conductor (111), and the second conductor (112), thereby making it possible to supply a plurality of DC powers of different voltages to the load device (200) via the reference conductor (110), the first conductor (111), and the second conductor (112). By supplying a plurality of DC powers of different voltages to the load device (200) in this manner, it is possible to reduce power loss that occurs during voltage conversion in the load device (200) and improve the degree of freedom in the voltage to be used, compared to when converting from a single voltage to a desired voltage.

[0122] In the wiring duct rail (1) according to the second aspect, in the first aspect, first DC power and second DC power are supplied to the load device (200) via the reference conductor (110) and each of the first conductor (111) and second conductor (112). The first DC power is DC power based on a first voltage (ΔV1) which is a potential difference (V1-V0) between a first potential (V1) and a reference potential (V0). The second DC power is DC power based on a second voltage (ΔV2=V2-V0) which is a potential difference between a second potential (V2) and the reference potential (V0).

[0123] According to this aspect, it is possible to supply two DC powers, a first voltage (ΔV1) and a second voltage (ΔV2), via the reference conductor (110) and each of the first conductor (111) and the second conductor (112).

[0124] The wiring duct rail (1) according to a third aspect is the same as that of the second aspect, and further includes a third conductor (113) to which a third potential (V3) is applied. The third potential (V3) is a potential different from the reference potential (V0), the first potential (V1), and the second potential (V2) (V3 ≠ V1 and V3 ≠ V2). Third DC power is further supplied to the load device (200) via the reference conductor (110) and the third conductor (113). The third DC power is DC power based on a third voltage (ΔV3 = V3 - V0), which is the potential difference between the third potential (V3) and the reference potential (V0).

[0125] According to this aspect, a wider variety of DC power can be supplied via four or more conductors (110-113), improving versatility. Specifically, three DC powers, namely, a first voltage (ΔV1), a second voltage (ΔV2), and a third voltage (ΔV3), can be supplied via the reference conductor (110) and each of the first conductor (111), second conductor (112), and third conductor (113). Note that, instead of the third potential (V3), the third conductor (113) may be supplied with, for example, a reference potential (V0), or a potential that changes depending on information sent to the load device (200).

[0126] The wiring duct rail (1) according to a fourth aspect is the third aspect, further comprising a potential generator (13). The potential generator (13) generates a third potential (V3) based on a reference potential (V0) applied to the reference conductor (110), a first potential (V1) applied to the first conductor (111), and a second potential (V2) applied to the second conductor (112). The potential generator (13) then applies the third potential (V3) to the third conductor (113).

[0127] According to this aspect, the potential generating unit (13) generates the third potential (V3) based on three types of potentials, i.e., the reference potential (V0), the first potential (V1), and the second potential (V2), and applies the third potential (V3) to the third conductor (113), thereby enabling DC power of a wider variety of voltages to be supplied to the load device (200). Compared to generating the third potential (V3) based on two types of potentials, i.e., the first potential (V1) and the second potential (V2), it is possible to reduce the potential difference of the potential to be generated (third potential V3) from the original potentials (reference potential V0, first potential V1, second potential V2) (in other words, the voltage difference between the converted voltage (third voltage ΔV3) and the original voltages (first voltage ΔV1, second voltage ΔV2)), thereby reducing power loss that occurs during potential generation (voltage conversion).

[0128] In the wiring duct rail (1) according to a fifth aspect, in any one of the second to fourth aspects, the reference potential (V0) is zero potential (V0=0). The first voltage (ΔV1) and the second voltage (ΔV2) have the same polarity (0<ΔV1 and 0<ΔV2, or ΔV1<0 and ΔV2<0). The first voltage (ΔV1) is at least twice the second voltage (ΔV2) (ΔV2×2≦ΔV1).

[0129] According to this aspect, it is possible to supply DC power of two voltages, namely, the first voltage (ΔV1) and the second voltage (ΔV2) having the same polarity as the first voltage (ΔV1) and an absolute value at least twice as large.

[0130] In the wiring duct rail (1) according to the sixth aspect, in any one of the second to fourth aspects, the reference potential (V0) is zero potential (V0=0). The first voltage (ΔV1) and the second voltage (ΔV2) have opposite polarities (0<ΔV1 and ΔV2<0, or ΔV1<0 and 0<ΔV2).

[0131] According to this aspect, it is possible to supply DC power of two voltages, namely, the first voltage (ΔV1) and the second voltage (ΔV2) having a polarity opposite to that of the first voltage (ΔV1).

[0132] In the wiring duct rail (1) according to the seventh aspect, in the sixth aspect, the first voltage (ΔV1) and the second voltage (ΔV2) have the same absolute value.

[0133] According to this aspect, it is possible to supply DC power of two voltages, namely, the first voltage (ΔV1) and the second voltage (ΔV2) which has the same absolute value but is opposite in polarity to the first voltage (ΔV1).

[0134] A wiring system (100) according to an eighth aspect includes the wiring duct rail (1) according to any one of the first to seventh aspects.

[0135] According to this aspect, similar to the first aspect, by supplying multiple DC powers of different voltages to the load device (200), it is possible to reduce the power loss that occurs during voltage conversion while improving the flexibility of the voltage to be used, compared to when the load device (200) converts from a single voltage to a desired voltage.

[0136] A wiring system (100) according to a ninth aspect is the same as the eighth aspect, further comprising a power supply unit (12). The power supply unit (12) applies a reference potential (V0), a first potential (V1), and a second potential (V2) to the reference conductor (110), the first conductor (111), and the second conductor (112), respectively, and supplies at least first DC power and second DC power to the load device (200) via the reference conductor (110), the first conductor (111), and the second conductor (112). The first DC power is DC power based on a first voltage (ΔV1), which is a potential difference between the first potential (V1) and the reference potential (V0). The second DC power is DC power based on a second voltage (ΔV2), which is a potential difference between the second potential (V2) and the reference potential (V0).

[0137] According to this aspect, it is possible to provide a wiring system (100) in which the power supply unit (12) supplies a plurality of DC powers to the load device (200) via three or more conductors (110 to 112).

[0138] In the wiring system (100) of the ninth aspect, the power supply section (12) may be integrated with the wiring duct rail (1).

[0139] In this way, by integrating the wiring duct rail (1) and the power supply unit (12), it is possible to provide a wiring system (100) that eliminates the need to run three or more connection wires (not shown) from the wiring duct rail (1) to the power supply unit (12), which is necessary when a separate power supply unit (12) is provided.

[0140] In addition, in the wiring system (100) of the ninth aspect, the power supply unit (12) may be separate from the wiring duct rail (1) and electrically connected to three or more connection lines routed from the wiring duct rail (1).

[0141] In this way, by providing a power supply unit (12) separate from the wiring duct rail (1), it is possible to provide a wiring system (100) that adds a power supply function while simplifying the wiring duct rail (1).

[0142] The wiring system (100) according to a tenth aspect is the same as the ninth aspect, and further includes a third conductor (113). The third conductor (113) is a conductor to which a third potential (V3) is applied. The third potential (V3) is a potential different from the reference potential (V0), the first potential (V1), and the second potential (V2) (V3≠V1 and V3≠V2).

[0143] According to this aspect, it is possible to supply a wider variety of DC power to the load device (200) via four or more conductors (110 to 113), thereby improving versatility.

[0144] The wiring system (100) according to an eleventh aspect is the same as the tenth aspect, and further includes a potential generating unit (13). The potential generating unit (13) generates a third potential (V3) based on a reference potential (V0) applied to the reference conductor (110), a first potential (V1) applied to the first conductor (111), and a second potential (V2) applied to the second conductor (112). The potential generating unit (13) then applies the third potential (V3) to the third conductor (113). The power supply unit (12) further supplies third DC power based on a third voltage (ΔV3) to the load device (200) via the reference conductor (110), the potential generating unit (13), and the third conductor (113).

[0145] According to this aspect, the potential generating unit (13) generates the third potential (V3) based on three types of potentials, i.e., the reference potential (V0), the first potential (V1), and the second potential (V2), and applies the third potential (V3) to the third conductor (113), thereby enabling DC power of a wider variety of voltages to be supplied to the load device (200). Compared to generating the third potential (V3) based on two types of potentials, i.e., the first potential (V1) and the second potential (V2), it is possible to reduce the potential difference between the third potential (V3) to be generated and the original potentials (V0 to V2) (the voltage difference between the converted third voltage ΔV3 and the original voltage ΔV1 or ΔV2), thereby reducing power loss that occurs during potential generation (voltage conversion).

[0146] In the wiring system (100) of the eleventh aspect, the potential generating unit (13) may be provided in the wiring duct rail (1).

[0147] In this way, by providing the potential generating unit (13) in the wiring duct rail (1), it is possible to provide a wiring system (100) that can generate the third potential (V3) based on the reference potential (V0), the first potential (V1), and the second potential (V2) in the wiring duct rail (1) even when only the reference potential (V0), the first potential (V1), and the second potential (V2) are applied from the outside and the third potential (V3) is not applied.

[0148] The wiring system (100) according to the twelfth aspect is the tenth aspect, wherein the power supply unit (12) further applies a third potential (V3) to the third conductor (113), and further supplies a third DC power based on a third voltage (ΔV3=V3-V0), which is the potential difference of the third potential (V3) with respect to the reference potential (V0), to the load device (200) via the reference conductor (110) and the third conductor (113).

[0149] According to this aspect, the power supply unit (12) further applies a third potential (V3) to the third conductor (113) and further supplies third DC power based on a third voltage (ΔV3 = V3 - V0) via the reference conductor (110) and the third conductor (113), thereby enabling DC power of a wider variety of voltages to be supplied to the load device (200).

[0150] REFERENCE SIGNS LIST 100 Wiring system 1 Wiring duct rail 110 Reference conductor 111 First conductor 112 Second conductor 113 Third conductor 12 Power supply section 13 Potential generating section 200 Load device L1 Length direction V0 Reference potential V1 First potential V2 Second potential V3 Third potential ΔV1 First voltage ΔV2 Second voltage ΔV3 Third voltage

Claims

1. a reference conductor to which a reference potential is applied; a first conductor to which a first potential different from the reference potential is applied; a linear second conductor to which a second potential, which is a potential different from both the reference potential and the first potential, is applied; a first DC power based on a first voltage which is a potential difference between the first potential and the reference potential, and a second DC power based on a second voltage which is a potential difference between the second potential and the reference potential are supplied to the load device via the reference conductor and each of the first conductor and the second conductor; the reference potential is zero potential, the first voltage and the second voltage have the same polarity; the first voltage is at least twice the second voltage; Wiring duct rail.

2. a reference conductor to which a reference potential is applied; a first conductor to which a first potential different from the reference potential is applied; a second conductor to which a second potential, which is different from both the reference potential and the first potential, is applied; a third conductor to which a third potential, which is a potential different from any of the reference potential, the first potential, and the second potential, is applied; A first DC power based on a first voltage which is a potential difference between the first potential and the reference potential, and a second DC power based on a second voltage which is a potential difference between the second potential and the reference potential are supplied to the load device via the reference conductor and each of the first conductor and the second conductor, and a third DC power based on a third voltage which is a potential difference between the third potential and the reference potential is further supplied to the load device via the reference conductor and the third conductor. Wiring duct rail.

3. a third conductor to which a third potential, which is a potential different from any of the reference potential, the first potential, and the second potential, is applied; a third DC power based on a third voltage, which is a potential difference between the third potential and the reference potential, is further supplied to the load device via the reference conductor and the third conductor; The wiring duct rail according to claim 1 .

4. a potential generating unit that generates the third potential based on the reference potential applied to the reference conductor, the first potential applied to the first conductor, and the second potential applied to the second conductor, and applies the third potential to the third conductor. The wiring duct rail according to claim 3.

5. a potential generating unit that generates the third potential based on the reference potential applied to the reference conductor, the first potential applied to the first conductor, and the second potential applied to the second conductor, and applies the third potential to the third conductor. The wiring duct rail according to claim 2.

6. the reference potential is zero potential, the first voltage and the second voltage have opposite polarities; The wiring duct rail according to claim 2.

7. the first voltage and the second voltage have the same absolute value; The wiring duct rail according to claim 6.

8. The reference potential is zero potential, the first voltage and the second voltage have opposite polarities; The wiring duct rail according to claim 5.

9. The first voltage and the second voltage have equal absolute values. The wiring duct rail according to claim 8.

10. A wiring duct rail according to any one of claims 1 to 9, Wiring system.

11. The device further comprises a power supply unit which provides the reference potential, the first potential and the second potential to the reference conductor, the first conductor and the second conductor, respectively, and supplies at least a first DC power based on a first voltage which is a potential difference of the first potential with respect to the reference potential, and a second DC power based on a second voltage which is a potential difference of the second potential with respect to the reference potential, to the load device via the reference conductor and each of the first conductor and the second conductor. The wiring system according to claim 10.

12. The semiconductor device further comprises a linear third conductor to which a third potential, which is a potential different from any of the reference potential, the first potential, and the second potential, is applied. The wiring system according to claim 11.

13. The device further comprises a potential generating unit that generates the third potential based on the reference potential applied to the reference conductor, the first potential applied to the first conductor, and the second potential applied to the second conductor, applies the third potential to the third conductor, and supplies to the load device, via the reference conductor and the third conductor, a third DC power based on a third voltage which is the potential difference of the third potential with respect to the reference potential; the power supply unit further supplies third DC power based on the third voltage to the load device via the reference conductor, the potential generating unit, and the third conductor. The wiring system according to claim 12.

14. The power supply unit further applies the third potential to the third conductor, and further supplies third DC power based on a third voltage, which is a potential difference of the third potential with respect to the reference potential, to the load device via the reference conductor and the third conductor. The wiring system according to claim 12.