JP2019216122A - Circuit breaker and distribution board - Google Patents

Abstract

To provide a circuit breaker and a distribution board which allow easier grounding work.SOLUTION: A conductive bar 5 is connected to a first terminal t1. A wire (a branch wire) having a load connected thereto is connected to a second terminal t2. A contact part which can be switched either to an on-state or an off-state by operating a handle 33 is electrically connected between the first terminal t1 and the second terminal t2. A ground branch wire electrically connected to the load is connected to a third terminal t3. The third terminal t3 is connected (short-circuited) to a fourth terminal t4 via a connection circuit (a short circuit 32). A case 30 houses the third terminal t3, the fourth terminal t4, and the connection circuit (the short circuit 32). The case 30 has: a through-hole 38 into which the ground branch wire is inserted for the connection to the third terminal t3; and a slit 35a, different from the through-hole 38, which is an insertion port to insert a grounding bar 500 for electrically connecting between the fourth terminal t4 and a ground terminal.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a switch and a distribution board.

  Conventionally, there has been proposed a branch breaker in which ground terminals are provided on the load side and the power supply side of a case, respectively, and the ground terminal on the load side and the ground terminal on the power supply side are electrically connected to each other via an electric circuit. (See, for example, Patent Document 1). When the ground branch line is connected to the ground terminal on the load side while the ground terminal on the power supply side is grounded via the ground line, the ground branch line is configured to be grounded via the branch breaker. .

JP 2001-16714 A

  In the branch breaker disclosed in Patent Literature 1, since the ground terminal on the load side and the ground terminal on the power supply side are each formed of a screw-type terminal, an operation of connecting an electric wire to the ground terminals on the load side and the power supply side. Was troublesome.

  The present invention has been made in view of the above problems, and has as its object to provide a switch and a distribution board that facilitate grounding work.

  The switch of the present invention includes a first terminal electrically connected to a power supply, a second terminal electrically connected to a load, and an electric connection between the first terminal and the second terminal. And a third terminal to which a ground wire electrically connected to the load is connected, a fourth terminal electrically connected to a ground terminal, the third terminal and the fourth terminal, And a case for holding the third terminal, the fourth terminal, and the connection circuit, wherein the case is connected to the third terminal. A first insertion port for inserting a wire, and a second insertion port for inserting a grounding member for electrically connecting the fourth terminal and the ground terminal, wherein the second insertion port is different from the first insertion port. It has an insertion opening.

  A distribution board according to the present invention includes the above-described switch and a cabinet that houses the switch.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a switch and a distribution board that facilitate grounding work.

It is a front view of the distribution board of an embodiment. It is an internal circuit diagram of a branch switch of an embodiment. It is the side view which looked at the state where the branch switch of an embodiment was attached to the attachment member from the width direction. It is the side view which looked at the branch switch of an embodiment from the length direction. It is the side view which looked at the branch switch which has four slits from the width direction. It is a figure which shows the external appearance of the branch switch which has one quick connection terminal.

  The present embodiment relates to a switch and a distribution board, and more particularly, to a branch switch and a distribution board to which a ground branch line is connected.

  Hereinafter, a switch and a distribution board according to the present embodiment will be described with reference to the drawings. In the present embodiment, a branch switch will be described as an example of the switch. The distribution board of the present embodiment is used, for example, installed in a building such as a factory or an office. However, the configuration described below is merely an example of the present invention. The present invention is not limited to the following embodiments, and various changes can be made according to the design and the like without departing from the technical idea according to the present invention.

  As shown in FIG. 1, the distribution board 1 of the present embodiment includes a box-shaped cabinet 10 having an open front surface. Hereinafter, the vertical and horizontal directions (up and down and left and right in FIG. 1) when the distribution board 1 is mounted on a wall will be referred to as the vertical and horizontal directions, and the direction orthogonal to the wall (the direction orthogonal to the paper surface of FIG. 1) will be described as the front and rear direction. However, the direction in which the distribution board 1 is mounted is not limited to the above direction.

  Inside the cabinet 10, a main switch 2 and a plurality of branch switches 3 are housed as internal units. The plurality of branch switches 3 are attached to a rectangular plate-shaped attachment member 4 arranged inside the cabinet 10. On the side wall of the cabinet 10, there are provided through holes for passing wiring such as a power supply line 201 connected to the commercial power supply 100 (power supply), a branch line 202 for distributing power, a ground branch line 203, and a ground line 206. I have. A ground terminal 11 for connecting a ground line 206 is provided inside the cabinet 10. A door is attached to the cabinet 10 so as to close the opening at the opening on the front surface of the cabinet 10.

  A single-phase three-wire power supply line 201 from the commercial power supply 100 is connected to a terminal 21 on the primary side of the main switch 2. Three conductive bars 5 of a voltage pole (L1 phase, L2 phase) and a neutral pole are electrically connected to the terminal 22 on the secondary side of the main switch 2. Each of the three conductive bars 5 (bus lines) is formed in a strip shape by pressing a metal plate, and is electrically connected to the power supply line 201 via the main switch 2.

  The mounting member 4 is a metal plate having a rectangular planar shape, and is fixed to the inside (for example, the bottom surface) of the cabinet 10 with, for example, screws. Three conductive bars 5 are attached to the center of the cabinet 10 in the left-right direction, where the attachment members 4 are not installed. The three conductive bars 5 are arranged so that the longitudinal direction is parallel to the up-down direction and are spaced at intervals in the front-rear direction. A plurality of branch switches 3 are mounted on the mounting member 4 on both left and right sides with respect to the conductive bar 5 so as to be arranged vertically. The front surface of the conductive bar 5 is covered with a cover 6 made of synthetic resin disposed in front of the conductive bar 5.

  The attachment member 4 is provided with a screw terminal 42 for connecting one end of the ground wire 205. The other end of the ground line 205 is electrically connected to the ground terminal 11, and the ground terminal 11 is grounded via the ground line 206. Therefore, the mounting member 4 is grounded via the ground lines 205 and 206.

  Further, the attachment member 4 is provided with a locking piece 41 whose side view is formed in an L-shape by cutting and raising a part of the attachment member 4 (see FIG. 3). When the branch switch 3 is attached to the mounting member 4, the locking piece 41 is electrically connected to the fourth terminal t4 of the branch switch 3, so that the fourth terminal t4 is electrically connected to the mounting member 4. Is done.

  Next, the branch switch 3 will be described with reference to FIGS.

  First, the electrical configuration of the branch switch 3 will be described with reference to FIG. The branch switch 3 includes two first terminals t1, two second terminals t2, a third terminal t3, a fourth terminal t4, two contact portions 31, and a short circuit 32 (connection circuit). ).

  The conductive bar 5 is connected to each of the two first terminals t1. When the branch switch 3 is for 100 V, a conductive bar 5 of a voltage pole (L1 phase or L2 phase) is connected to one of the two first terminals t1 and the one of the two first terminals t1. The other end is connected to a neutral conductive bar 5. When the branch switch 3 is for 200 V, the L1 phase conductive bar 5 is connected to one of the two first terminals t1, and the L2 phase conductive bar is connected to the other of the two first terminals t1. Bar 5 is connected.

  Each of the two second terminals t2 is connected to a branch line 202 to which a load (for example, an outlet with a ground electrode) is connected.

  Each of the two contact portions 31 is electrically connected between the corresponding first terminal t1 and second terminal t2. The two contact portions 31 are switched between an on state and an off state in accordance with the operation of the handle 33 (see FIG. 3). The branch switch 3 may have an overcurrent protection function of forcibly opening the contact portion 31 when the load current flowing through the branch line 202 exceeds a preset threshold value.

  The ground branch line 203 electrically connected to the ground pole of the load is connected to the third terminal t3. The third terminal t3 is a ground branch line terminal to which the ground branch line 203 is connected. Here, for example, an outlet with a ground electrode is connected as a load to the branch switch 3, and a ground branch line 203 electrically connected to the ground electrode of the outlet is connected to the third terminal t3.

  The fourth terminal t <b> 4 is electrically connected to the metal attachment member 4, and is electrically connected to the ground terminal 11 via the attachment member 4.

  The short circuit 32 electrically short-circuits (connects) the third terminal t3 and the fourth terminal t4.

  The branch switch 3 further includes a case 30 that houses (holds) the first terminal t1, the second terminal t2, the third terminal t3, the fourth terminal t4, the contact part 31, and the short circuit 32.

  The case 30 is a molded product of a synthetic resin, and is formed in a rectangular parallelepiped shape. The size of the case 30 is reduced in the order of the left-right direction, the front-rear direction, and the up-down direction in FIG. In addition, in the case 30, the left-right direction of FIG. 1 is called a longitudinal direction, the front-back direction is called a height direction, and the up-down direction is called short (width) direction.

  Next, a mechanical configuration of the branch switch 3 will be described with reference to FIGS. FIG. 3 is a side view of a state in which the branch switch 3 is attached to the attachment member 4 when viewed from a short (width) direction. FIG. 4 is a side view of the branch switch 3 viewed from the longitudinal direction.

  Three slits 35 into which the corresponding conductive bars 5 of the three conductive bars 5 are inserted are provided at one end in the longitudinal direction of the case 30 (left side in FIG. 3). In two of the three slits 35 (the two front ones in FIG. 1), a blade receiving member 36 that contacts the conductive bar 5 inserted into the slit 35 from both ends in the thickness direction is arranged. I have. The blade receiving member 36 is made of a metal material having elasticity and conductivity, and the blade receiving member 36 forms a first terminal t1. When the conductive bar 5 inserted into the slit 35 contacts the blade receiving member 36, the conductive bar 5 is electrically connected to the first terminal t1.

  At the other end of the case 30 in the longitudinal direction (right side in FIG. 3), a quick connection terminal 70 serving as the second terminal t2 and a quick connection terminal 80 serving as the third terminal t3 are arranged in two stages in the height direction. (See FIG. 3). In the present embodiment, the quick-connecting terminal 70 is housed in the case 30 so that the quick-connecting terminal 80 is located above in FIG. The branch switch 3 of the present embodiment includes two quick connection terminals 70 and two quick connection terminals 80. The ground branch line 203 is connected to one of the two quick connection terminals 80. The two quick connection terminals 70 are arranged so as to be arranged in the width direction of the case 30, and the two quick connection terminals 80 are also arranged so as to be arranged in the width direction of the case 30. Two through holes 37 are provided at positions corresponding to each of the two quick-connecting terminals 70 on the side surface of the case 30 viewed from the other end in the longitudinal direction. Two through holes 38 are provided at corresponding positions (see FIGS. 3 and 4).

  Inside the case 30, a conductive plate 320 constituting the short circuit 32 is housed. The conductive plate 320 is formed in a shape in which both ends of a strip-shaped metal plate are bent at substantially right angles. The conductive plate 320 is housed inside the case 30 so that the center portion is along the bottom wall of the case 30. A terminal strip 321 connected to the third terminal t3 is provided at the other end of the conductive plate 320 in the longitudinal direction (right in FIG. 3). At one end of the conductive plate 320 in the longitudinal direction (left side in FIG. 3), a terminal piece 322 that is electrically connected to the locking piece 41 of the mounting member 4 is provided. The terminal strip 322 is arranged at a position facing the opening 34 provided on the lower surface of the case 30. When the case 30 is attached to the mounting member 4, the locking piece 41 of the mounting member 4 is inserted into the case 30 through the opening 34, and the locking piece 41 comes into contact with the terminal piece 322. 4 are electrically connected. Here, the fourth terminal t4 is configured by the terminal piece 322. In this case, the conductive plate 320 is provided (stored) on the rear surface side of the case 30.

  The quick connection terminal 70 includes a terminal plate 71, a lock spring 72, and a release lever 73.

  The terminal plate 71 is electrically connected to the contact part 31. The terminal plate 71 is arranged at a position facing an electric wire (branch line 202) inserted into the case 30 from the through hole 37.

  The locking spring 72 is formed in a shape in which both ends in the longitudinal direction of the band-shaped plate spring are bent. The locking spring 72 includes a locking piece 74 provided at one end of the central portion in the longitudinal direction, and a pressing piece 75 provided at the other end of the central portion in the longitudinal direction. The lock piece 74 has a J-shaped one end at the center of the lock spring 72. The other end of the center portion of the locking spring 72 of the pressing piece 75 is formed in an S-shape. The lock spring 72 is housed inside the case 30 so that the lock piece 74 and the pressing piece 75 face the terminal plate 71.

  The distance between the locking piece 74 and the through hole 37 is smaller than the distance between the pressing piece 75 and the through hole 37. When the electric wire is inserted into the case 30 through the through hole 37, the tip of the locking piece 74 bites into the electric wire, and the electric wire cannot be removed from the quick connection terminal 70. When the electric wire inserted into the case 30 from the through hole 37 is inserted between the terminal plate 71 and the pressing piece 75, the electric wire is pressed against the terminal plate 71 by the elastic force of the pressing piece 75, and the electric wire and the terminal plate 71 are electrically connected.

  The release lever 73 is rotatably attached to the case 30 about a shaft 76 supported by the case 30. An operation projection 77 is provided on the release lever 73 at a portion exposed from the opening 39 of the case 30. The release lever 73 is provided with a projection 78 that pushes the lock piece 74 in a direction away from the terminal plate 71 when the release lever 73 is rotated. When the release lever 73 is rotated clockwise in FIG. 3 by operating the operation protrusion 77 in a state where the electric wire is inserted between the lock spring 72 and the terminal plate 71, the lock piece 74 is moved by the protrusion 78. Is bent away from the terminal plate 71. When the locking piece 74 is deflected away from the terminal plate 71, the tip of the locking piece 74 is separated from the electric wire, so that the wire is released from the retaining state, and the electric wire can be removed. When the force for operating the operation projection 77 disappears, the projection 78 is pushed by the elastic return force of the lock piece 74, and the release lever 73 is moved to the position before the operation.

  The quick connection terminal 80 includes a terminal plate 81, a lock spring 82, and a release member 83.

  The terminal plate 81 is arranged at a position facing an electric wire (ground branch line 203) inserted into the case 30 from the through hole 38. The terminal strip 321 of the conductive plate 320 is fixed to the terminal plate 81 by an appropriate method such as welding, brazing, or caulking, and the terminal plate 81 and the conductive plate 320 are electrically connected.

  The locking spring 82 is formed in a shape in which both ends in the longitudinal direction of the band-shaped plate spring are bent. The locking spring 82 includes a locking piece 84 provided at one end of the central portion in the longitudinal direction, and a pressing piece 85 provided at the other end of the central portion in the longitudinal direction. The lock piece 84 is formed at one end of the central portion of the lock spring 82 in a J-shape. The pressing piece 85 is formed in an S-shape at the other end of the central portion of the locking spring 82. The lock spring 82 is housed inside the case 30 so that the lock piece 84 and the pressing piece 85 face the terminal plate 81.

  The distance between the locking piece 84 and the through hole 38 is smaller than the distance between the pressing piece 85 and the through hole 38. When an electric wire (ground branch line 203) is inserted into the case 30 from the through hole 38, the tip of the locking piece 84 bites into this electric wire, and the electric wire cannot be removed from the quick connection terminal 80. When the electric wire inserted into the case 30 from the through hole 38 is inserted between the terminal plate 81 and the pressing piece 85, the electric wire is pressed against the terminal plate 81 by the elastic force of the pressing piece 85, and the electric wire and the terminal plate 81 are electrically connected. A terminal that completes electrical connection and mechanical connection just by inserting an electric wire is called a quick-connect terminal.

  The release member 83 is disposed in a holding hole provided at the other end of the case 30 in the longitudinal direction (right in FIG. 3) so as to be able to move forward and backward. The operation section 86 of the release member 83 is exposed outside from the surface of the case 30. The release member 83 is provided with a projection 87 that pushes the lock piece 84 in a direction away from the terminal plate 81 when the operation unit 86 is pressed. When the operation unit 86 is pressed while the electric wire is inserted between the locking spring 82 and the terminal plate 81, the locking piece 84 is bent by the projection 87 in a direction away from the terminal plate 81. When the locking piece 84 is bent in a direction away from the terminal plate 81, the tip of the locking piece 84 is separated from the electric wire, so that the retaining state of the electric wire is released and the electric wire can be removed. When the pressing force of the operating portion 86 is lost, the projection 87 is pressed by the elastic restoring force of the lock piece 84, and the operating portion 86 projects from the surface of the case 30.

  The branch switch 3 of the present embodiment is attached to the attachment member 4 such that the conductive bar 5 is inserted into the slit 35. When the branch switch 3 is attached to the mounting member 4 in this manner, the locking piece 41 is hooked on the terminal piece 322 of the branch switch 3, and in this state, the right end of the case 30 is attached to the mounting member. 4, the branch switch 3 is fixed to the mounting member 4. When the branch switch 3 is attached to the attachment member 4, the engagement piece 41 contacts the terminal piece 322 (the fourth terminal t <b> 4), so that the attachment member 4 and the conductive plate 320 are electrically connected. Is done. Since the mounting member 4 is electrically connected to the ground terminal 11 of the cabinet 10 via the ground wire 205, the third terminal t3 (the quick connection terminal 80) of the branch switch 3 is grounded via the mounting member 4. It will be electrically connected to the terminal 11. When the ground branch line 203 from the branch circuit is connected to the quick connection terminal 80 of the branch switch 3, the ground branch line 203 is electrically connected to the ground terminal 11 via the mounting member 4, The ground branch line 203 is grounded. In the branch switch 3 of this embodiment, since the third terminal t3 to which the ground branch line 203 is connected is constituted by the quick connection terminal 80, the work of connecting the ground branch line 203 can be simplified. Here, in the distribution board 1 of the present embodiment, the mounting member 4 functions as a centralized ground terminal for electrically connecting the plurality of ground branch lines 203 to the ground terminal 11 collectively. In addition, there is an advantage that it is not necessary to separately provide a concentrated ground terminal.

  In this embodiment, the release lever 73 of the quick-connecting terminal 70 is rotated clockwise in FIG. 3 to release the electric wire (branch wire 202) from being removed, and the release member 83 of the quick-connecting terminal 80 is released. By pressing, release of the electric wire (ground branch line 203) is released. However, it is not limited to this. The quick stop terminal 70 may be used to release the retaining member using the release member 83, or the quick connecting terminal 80 may be used to release the retaining member using the release lever 73. Alternatively, in both cases, the release may be prevented using the release lever 73, or the release member 83 may be used to prevent the release.

  In the present embodiment, the fourth terminal t4 (conductive plate 320) is electrically connected to the metal mounting member 4 provided on the distribution board 1 for mounting the case 30, but is not limited thereto.

  As shown in FIG. 5, the case 30 may be provided with a slit 35a. A grounding bar 500 (third electric wire) connected to the metal mounting member 4 provided on the distribution board 1 is inserted into the slit 35a. A blade receiving member 36a that is in contact with the slit 35a so as to sandwich the ground bar 500 from both sides in the thickness direction is disposed. The blade receiving member 36a is formed of a metal material having elasticity and conductivity, and the fourth terminal t4 is configured by the blade receiving member 36a. When the grounding bar 500 inserted into the slit 35a comes into contact with the blade receiving member 36a, the grounding bar 500 is electrically connected to the fourth terminal t4.

  Further, the terminal strip 321 connected to the third terminal t3 is provided on one end side in the longitudinal direction of the conductive plate 320 housed (held) in the case 30, as described above. Further, a terminal strip 323 connected to the blade receiving member 36a (the fourth terminal t4) is provided on the other end side in the longitudinal direction of the conductive plate 320.

  The terminal strip 321 is fixed to the above-described terminal plate 81 by an appropriate method such as welding, brazing, or caulking, and the terminal plate 81 and the conductive plate 320 are electrically connected.

  When case 30 is mounted on distribution board 1 and grounding bar 500 is inserted into slit 35a, mounting member 4 and fourth terminal t4 are electrically connected. Thus, the mounting member 4 and the terminal plate 81 are electrically connected via the conductive plate 320.

  The member to which the fourth terminal t4 is electrically connected via the ground bar 500 does not need to be a member for attaching the case 30. The member to which the fourth terminal t4 is electrically connected via the grounding bar 500 may be at least a member (grounding member) electrically connected to the ground terminal 11. Here, the member to which the fourth terminal t4 is electrically connected via the ground bar 500 is a metal plate, an electric wire, or the like.

  In addition, the fourth terminal t4 is electrically connected to the ground terminal 11 via the ground bar 500, but is not limited thereto. The fourth terminal t4 may be electrically connected to a ground terminal different from the ground terminal 11 via the ground bar 500. Note that another ground terminal may be provided on the distribution board 1 or may be provided outside the distribution board 1.

  In the present embodiment, the branch switch 3 has the two quick connection terminals 80, but is not limited thereto. The number of the quick connection terminals 80 constituting the third terminal t3 may be at least one. FIG. 6 shows the appearance of the branch switch 3 having only one quick connection terminal constituting the third terminal t3.

  In the branch switch 3 having only one quick connection terminal constituting the third terminal t3, as shown in FIG. 6, one through hole 38 is provided. An electric wire is inserted into the through hole 38 and is electrically connected to the third terminal t3. Here, the quick connection terminal 80 in the branch switch 3 shown in FIG. 6 has the same configuration as the quick connection terminal 70 shown in FIG. That is, the quick-connecting terminal of the branch switch 3 shown in FIG. 6 prevents or releases the wire inserted into the through hole 38 by rotating the release lever 83a.

  In the present embodiment, the branch switch is used as an example of the switch, but is not limited thereto.

  The switch of the present embodiment only needs to have at least a function of opening and closing a switch (disconnect function) when electricity is not flowing. For example, the switch is a circuit breaker, a switch having no cutoff function, or a disconnector. For example, the switch of the present embodiment may be applied to an earth leakage circuit breaker (ELB) and a circuit breaker (MCB: Molded Case Circuit Breaker). Further, the distribution board 1 may have a configuration in which one or more MCBs and one or more ELBs are mixed and housed in the cabinet 10. This makes it possible to perform integrated grounding while simplifying the work of connecting the ground branch line 203.

  In the present embodiment, the quick connection terminal 70 is used as the second terminal t2, and the quick connection terminal 80 is used as the third terminal t3. However, the present invention is not limited to this. A screw terminal may be used as the second terminal t2, and a screw terminal may be similarly used for the third terminal t3.

  In the present embodiment, the blade receiving member 36 is arranged in the two front slits 35 in FIG. 3 among the three slits 35 shown in FIG. 3, but the present invention is not limited to this. The blade receiving member 36 may be provided in two of the three slits 35. That is, the order in which the conductive bars 5 are inserted into the three slits 35 is not fixed to the order shown in FIG. It is only necessary that the blade receiving member 36 be provided in accordance with the insertion order of the conductive bars 5.

  Similarly, the order of insertion of the three conductive bars 5 and the grounding bar 500 shown in FIG. 5 is not fixed. For example, the grounding bar 500 may be inserted at the front first position in FIG. In this case, the blade receiving member 36 may be provided according to the insertion order of the bars (the conductive bar 5 and the grounding bar 500) inserted into the four slits.

  Although the slits 35 and 35a are provided for inserting the conductive bar 5 and the grounding bar 500, the present invention is not limited to this. When the conductive bar 5 and the grounding bar 500 are electric wires, an insertion hole for inserting the electric wires may be provided.

  As described above, the switch (branch switch 3) of the present embodiment includes the first terminal t1, the second terminal t2, the contact portion 31, the third terminal t3, the fourth terminal t4, and the connection circuit. (Short circuit 32) and the case 30. A first electric wire (conductive bar 5) to which a power supply (commercial power supply 100) is connected is connected to the first terminal t1. A second electric wire (branch line 202) to which a load is connected is connected to the second terminal t2. The contact part 31 is electrically connected between the first terminal t1 and the second terminal t2. The third terminal t3 is a terminal to which a ground line (ground branch line 203) electrically connected to the load is connected. The fourth terminal t4 is electrically connected to a third electric wire (ground bar 500) connected to a ground terminal (for example, the ground terminal 11). The connection circuit (short circuit 32) connects (short circuit) between the third terminal t3 and the fourth terminal t4. The case 30 holds (stores) the first terminal t1, the second terminal t2, the third terminal t3, the fourth terminal t4, the contact part 31, and the connection circuit (short circuit 32). The case 30 has an insertion opening (for example, a slit 35a) for inserting a third electric wire that electrically connects the fourth terminal t4 to the ground terminal.

  According to the branch switch 3 of the present embodiment, in order to ground the fourth terminal t4 to which the ground branch line 203 is connected, a third electric wire (ground bar 500) may be inserted into the slit 35a. Therefore, the grounding work can be facilitated.

  Further, since the branch line 202 and the ground branch line 203 are connected to the branch switch 3, when the branch line 202 and the ground branch line 203 are composed of a multi-core VV line (vinyl insulated vinyl sheath cable), each of the branch lines The end processing of the electric wire becomes the same, and the processing time required for the end processing can be reduced.

  In the switch (branch switch 3) of the present embodiment, the ground terminal is provided on the distribution board. The third electric wire may be configured to be electrically connected to a ground terminal via a ground member (mounting member 4) provided on the distribution board 1.

  Since the fourth terminal t4 is electrically connected to the ground terminal 11 via the mounting member 4 only by inserting the third electric wire (grounding bar 500) into the slit 35a, the fourth terminal t4 is grounded. There is no need to perform another work, and the construction work is simplified.

  Further, when the plurality of branch switches 3 are held (stored) in the case 30, the fourth terminals t4 of each of the plurality of branch switches 3 are electrically connected to the ground member (mounting member 4). In addition, the mounting member 4 can also serve as the central ground terminal. Therefore, there is no need to provide a centralized ground terminal separately from the mounting member 4.

  Further, the distribution board 1 of the present embodiment is characterized by including the above-mentioned switch (branch switch 3) and a cabinet 10 that houses the switch (branch switch 3).

  According to the distribution board 1 of the present embodiment, in order to ground the fourth terminal t4 to which the ground branch line 203 is connected, the third wire (the ground bar 500) may be inserted into the slit 35a. Grounding work can be facilitated.

  When the ground branch line 203 is connected to the fourth terminal t4 of the branch switch 3, the ground branch line 203 is grounded via the centralized ground terminal of the distribution board 1.

1 distribution board 3 branch switch (switch)
4 Mounting member (grounding member)
5 Conductive bar (bus bar, first wire)
DESCRIPTION OF SYMBOLS 10 Cabinet 11 Ground terminal 30 Case 31 Contact part 32 Short circuit (connection circuit)
35 slit 35a slit (insertion opening)
100 Commercial power supply (power supply)
80 Quick connection terminal (third terminal)
202 Branch line (second electric wire)
203 Ground branch line 500 Ground bar (third wire)
t1 first terminal t2 second terminal t3 third terminal t4 fourth terminal

Claims (3)

A first terminal electrically connected to a power supply;
A second terminal electrically connected to the load;
A contact portion electrically connected between the first terminal and the second terminal;
A third terminal to which a ground wire electrically connected to the load is connected;
A fourth terminal electrically connected to the ground terminal;
A connection circuit for electrically connecting the third terminal and the fourth terminal;
A case that holds the third terminal, the fourth terminal, and the connection circuit;
The case has a first insertion opening for inserting the ground wire for connection with the third terminal, and a grounding member for electrically connecting between the fourth terminal and the ground terminal. A switch having an insertion port and a second insertion port different from the first insertion port. The ground terminal is provided on a distribution board,
2. The switch according to claim 1, wherein the grounding member is electrically connected to the ground terminal via a grounding member provided on the distribution board. 3. The switch according to claim 1 or 2,
A power distribution panel comprising: a cabinet accommodating the switch.

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