JP2016127792A - Switch and distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch and a distribution board that facilitate a grounding work.SOLUTION: An electrically conductive bar 5 is connected to a first terminal t1. An electrical wire (branch line) to which a load is connected is connected to a second terminal t2. A contact portion which is switched to any one of an on-state and an off-state upon operation of a handle 33 is electrically connected between the first terminal t1 and the second terminal t2. A ground branch line which is electrically connected to a load is connected to a third terminal t3. The third terminal t3 is connected (short-circuited) to a fourth terminal t4 through a connection circuit (short-circuiting circuit 32). In a case 30 are mounted the first terminal t1, the second terminal t2, the third terminal t3, the fourth terminal t4, the contact portion and the connection circuit (short-circuiting circuit 32). The case 30 has a slit 35a for inserting a ground bar 500 for electrically connecting the fourth terminal t4 and a ground terminal to each other.SELECTED DRAWING: Figure 5

Description

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

  Conventionally, a branch breaker has been proposed in which a ground terminal is provided on each of the load side and the power source side of the case, and the ground terminal on the load side and the ground terminal on the power source side are electrically connected via an electric circuit. (For example, refer to Patent Document 1). When the ground branch line is connected to the load side ground terminal 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 Document 1, since the load-side ground terminal and the power-side ground terminal are respectively constituted by screw-type terminals, the work of connecting the wires to the load-side and power-side ground terminals It took time and effort.

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

  The switch according to the present invention includes a first terminal to which a first electric wire electrically connected to a power source is connected, a second terminal to which a second electric wire electrically connected to a load is connected, and the first A contact portion electrically connected between the terminal and the second terminal, a third terminal to which a ground line electrically connected to the load is connected, and a first terminal electrically connected to the ground terminal. 4 terminals, a connection circuit for electrically connecting the third terminal and the fourth terminal, the first terminal, the second terminal, the third terminal, the fourth terminal, the contact portion, And a case for holding the connection circuit, wherein the case has an insertion port for inserting a third electric wire for electrically connecting the fourth terminal and the ground terminal.

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

  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 the branch switch of the embodiment. It is the side view which looked at the state where the branch switch of the embodiment was attached to the attachment member from the width direction. It is the side view which looked at the branch switch of 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 a switch. The distribution board of this embodiment is installed and used, for example in buildings, such as a factory and 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 modifications can be made according to the design and the like as long as they do not depart from the technical idea of 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. In the following description, the top, bottom, left and right (up, down, left and right in FIG. 1) when the distribution board 1 is attached to the wall are defined as top, bottom, left and right, and the direction orthogonal to the wall (the direction orthogonal to the paper surface of FIG. However, the direction in which the distribution board 1 is attached 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-like attachment member 4 disposed inside the cabinet 10. The side wall of the cabinet 10 is provided with a through-hole for passing wiring such as a power line 201 connected to the commercial power source 100 (power source), a branch line 202 for distributing power, a ground branch line 203, and a ground line 206. Yes. A ground terminal 11 for connecting a ground wire 206 is provided inside the cabinet 10. A door is attached to the cabinet 10 such that a door closes the opening at the opening on the front surface of the cabinet 10.

  A single-phase three-wire power line 201 from the commercial power supply 100 is connected to the primary side terminal 21 of the main switch 2. Three conductive bars 5 of a voltage electrode (L1 phase, L2 phase) and a neutral electrode are electrically connected to the secondary terminal 22 of the main switch 2. Each of the three conductive bars 5 (bus bars) 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 screws, for example. Three conductive bars 5 are attached to a central portion in the left-right direction of the cabinet 10 where the attachment member 4 is not installed. The three conductive bars 5 are arranged so that the longitudinal direction thereof is parallel to the vertical direction and are arranged at intervals in the front-rear direction. A plurality of branch switches 3 are attached to the attachment member 4 so as to be arranged in the vertical direction on both the left and right sides of the conductive bar 5. The front surface of the conductive bar 5 is covered with a synthetic resin cover 6 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 wire 205 is electrically connected to the ground terminal 11, and the ground terminal 11 is grounded via the ground wire 206. Therefore, the attachment member 4 is grounded via the ground wires 205 and 206.

  Further, the attachment member 4 is provided with a locking piece 41 whose side view shape is formed in an L shape, for example, 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 t 4 of the branch switch 3, whereby the fourth terminal t 4 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 100V, one of the two first terminals t1 is connected to the conductive bar 5 of the voltage pole (L1 phase or L2 phase), and one of the two first terminals t1 The other is connected to a conductive bar 5 having a neutral electrode. When the branch switch 3 is for 200V, the L1 phase conductive bar 5 is connected to one of the two first terminals t1, and the L2 phase conductive is connected to the other of the two first terminals t1. Bar 5 is connected.

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

  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 to either the on state or the off state according to the operation of the handle 33 (see FIG. 3). Further, the branch switch 3 may have an overcurrent protection function for forcibly opening the contact portion 31 when the load current flowing through the branch line 202 exceeds a preset threshold value.

  A ground branch line 203 that is electrically connected to the ground electrode 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 to the branch switch 3 as a load, 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 through the attachment member 4.

  The short circuit 32 electrically short-circuits (connects) between 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 portion 31, and the short circuit 32.

  The case 30 is a molded product of synthetic resin and is formed in a rectangular parallelepiped shape. The case 30 has smaller dimensions in the order of the left-right direction, the front-rear direction, and the up-down direction in FIG. In the case 30, the left-right direction in FIG. 1 is referred to as a longitudinal direction, the front-rear direction is referred to as a height direction, and the up-down direction is referred to as a short (width) direction.

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

  Three slits 35 into which the corresponding conductive bars 5 among the three conductive bars 5 are respectively inserted are provided at one end of the case 30 in the longitudinal direction (left in FIG. 3). Two of the three slits 35 (two in front in FIG. 1) are provided with blade receiving members 36 that contact the conductive bar 5 inserted into the slit 35 so as to sandwich the conductive bar 5 from both ends in the thickness direction. Yes. The blade receiving member 36 is formed of a metal material having elasticity and conductivity, and the blade receiving member 36 constitutes a first terminal t1. The conductive bar 5 inserted into the slit 35 is brought into contact with the blade receiving member 36, whereby the conductive bar 5 is electrically connected to the first terminal t1.

  At the other end in the longitudinal direction of the case 30 (right side in FIG. 3), a quick connection terminal 70 to be the second terminal t2 and a quick connection terminal 80 to be the third terminal t3 are arranged in two steps in the height direction. (See FIG. 3). In the present embodiment, the quick connection terminal 70 is accommodated in the case 30 so that the quick connection terminal 70 is positioned above the FIG. 3 and the quick connection terminal 80 is positioned below the FIG. The branch switch 3 of this 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 in the width direction of the case 30, and the two quick connection terminals 80 are also arranged in the width direction of the case 30. Two through holes 37 are provided at positions corresponding to the two quick connection terminals 70 on the side surface of the case 30 as viewed from the other end in the longitudinal direction, and each of the two quick connection terminals 80 is provided. Two through holes 38 are provided at corresponding positions (see FIGS. 3 and 4).

  A conductive plate 320 constituting the short circuit 32 is housed inside the case 30. 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 in the case 30 so that the central portion is along the bottom wall of the case 30. A terminal piece 321 connected to the third terminal t3 is provided at the other end (right side in FIG. 3) in the longitudinal direction of the conductive plate 320. A terminal piece 322 that is electrically connected to the locking piece 41 of the mounting member 4 is provided at one end (left side in FIG. 3) in the longitudinal direction of the conductive plate 320. The terminal piece 322 is disposed at a position facing the opening 34 provided on the lower surface of the case 30. When the case 30 is attached to the attachment member 4, the engagement piece 41 of the attachment member 4 is inserted into the case 30 through the opening 34, and the engagement piece 41 comes into contact with the terminal piece 322. 4 are electrically connected. Here, the terminal piece 322 constitutes the fourth terminal t4. In this case, the conductive plate 320 is provided (contained) on the rear surface side of the case 30.

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

  The terminal board 71 is electrically connected to the contact part 31. The terminal plate 71 is disposed at a position facing the 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 end portions in the longitudinal direction of the belt spring are bent. The locking spring 72 includes a locking piece 74 provided at one end in the longitudinal direction of the central portion, and a pressing piece 75 provided at the other end in the longitudinal direction of the central portion. In the locking piece 74, one end of the central portion of the locking spring 72 is formed in a J shape. In the pressing piece 75, the other end of the central portion of the locking spring 72 is formed in an S shape. The locking spring 72 is housed in the case 30 so that the locking piece 74 and the pressing piece 75 are opposed to 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 an electric wire is inserted into the case 30 from the through hole 37, the end 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 is electrically connected.

  The release lever 73 is attached to the case 30 so as to be rotatable about a shaft 76 supported by the case 30. The release lever 73 is provided with an operation projection 77 at a portion exposed from the opening 39 of the case 30. The release lever 73 is provided with a protrusion 78 that pushes the locking piece 74 in a direction away from the terminal board 71 when the release lever 73 is rotated. When the operation protrusion 77 is operated and the release lever 73 is rotated clockwise in FIG. 3 in a state where the electric wire is inserted between the lock spring 72 and the terminal plate 71, the lock piece 74 is locked by the protrusion 78. Is bent away from the terminal board 71. When the locking piece 74 is bent in a direction away from the terminal plate 71, the leading end of the locking piece 74 is separated from the electric wire, so that the state where the electric wire is prevented from being released is released and the electric wire can be removed. When the force to operate the operation protrusion 77 is lost, the protrusion 78 is pushed by the elastic return force of the locking 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 locking spring 82, and a release member 83.

  The terminal plate 81 is disposed at a position facing an electric wire (ground branch line 203) inserted into the case 30 from the through hole 38. The terminal plate 321 of the conductive plate 320 is fixed to the terminal plate 81 by an appropriate method such as welding, brazing, and 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 end portions in the longitudinal direction of the belt spring are bent. The locking spring 82 includes a locking piece 84 provided at one end in the longitudinal direction of the central portion and a pressing piece 85 provided at the other end in the longitudinal direction of the central portion. In the locking piece 84, one end of the central portion of the locking spring 82 is formed in a J shape. In the pressing piece 85, the other end of the central portion of the locking spring 82 is formed in an S shape. The locking spring 82 is housed inside the case 30 so that the locking piece 84 and the pressing piece 85 are opposed to 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 wire 203) is inserted into the case 30 from the through hole 38, the tip of the locking piece 84 bites into the 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 is electrically connected. A terminal that completes electrical connection and mechanical connection by simply inserting an electric wire is called a fast-connection terminal.

  The release member 83 is movably disposed in a holding hole provided in the other end portion of the case 30 in the longitudinal direction (right side in FIG. 3). The operation portion 86 of the release member 83 is exposed to the outside from the surface of the case 30. The release member 83 is provided with a protrusion 87 that pushes the locking piece 84 in a direction away from the terminal plate 81 when the operation portion 86 is pushed. When the operating portion 86 is pushed in a state where the electric wire is inserted between the locking spring 82 and the terminal plate 81, the locking piece 84 is deflected by the protrusion 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 leading end of the locking piece 84 is separated from the electric wire, so that the state where the electric wire is prevented from being released is released and the electric wire can be removed. When the force to push the operation portion 86 is lost, the projection 87 is pushed by the elastic restoring force of the locking piece 84, and the operation portion 86 protrudes from the surface of the case 30.

  The branch switch 3 of this embodiment is attached to the attachment member 4 so that the conductive bar 5 is inserted into the slit 35. When the branch switch 3 is thus attached to the mounting member 4, the locking piece 41 is hooked on the terminal piece 322 of the branch switch 3, and the right end of the case 30 is attached to the mounting member in this state. When fixed to 4, the branch switch 3 is fixed to the mounting member 4. Further, in a state where the branch switch 3 is attached to the attachment member 4, the attachment member 4 and the conductive plate 320 are electrically connected by the locking piece 41 coming into contact with the terminal piece 322 (fourth terminal t <b> 4). Is done. Since the attachment member 4 is electrically connected to the ground terminal 11 of the cabinet 10 via the ground wire 205, the third terminal t 3 (fast connection terminal 80) of the branch switch 3 is grounded via the attachment member 4. It is electrically connected to the terminal 11. Then, 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 the present embodiment, the third terminal t3 to which the ground branch line 203 is connected is constituted by the quick connection terminal 80, so that the work of connecting the ground branch line 203 can be simplified. Here, in the distribution board 1 according to the present embodiment, the mounting member 4 functions as a centralized ground terminal for collectively connecting a plurality of ground branch lines 203 to the ground terminal 11. Another advantage is that there is no need to provide a central ground terminal.

  In this embodiment, the release lever 73 provided in the quick connection terminal 70 is rotated clockwise in FIG. 3 to release the electric wire (branch line 202) and the release member 83 provided in the quick connection terminal 80. By pressing, it is assumed that the retention of the electric wire (the ground branch line 203) is released. However, it is not limited to this. The fast connection terminal 70 may release the retaining member using the release member 83, or the fast connection terminal 80 may perform the removal prevention using the release lever 73. Alternatively, both may be prevented from coming off using the release lever 73, or may be kept from coming off using the release member 83.

  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 the present invention is not limited to this.

  As shown in FIG. 5, a slit 35 a may be provided in the case 30. 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. In the slit 35a, a blade receiving member 36a that contacts the grounding bar 500 so as to be sandwiched 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 blade receiving member 36a constitutes the fourth terminal t4. The grounding bar 500 inserted into the slit 35a is brought into contact with the blade receiving member 36a, whereby the grounding bar 500 is electrically connected to the fourth terminal t4.

  Further, as described above, the terminal piece 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. A terminal piece 323 connected to the blade receiving member 36a (fourth terminal t4) is provided on the other end side in the longitudinal direction of the conductive plate 320.

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

  When the case 30 is attached to the distribution board 1 and the grounding bar 500 is inserted into the slit 35a, the attachment member 4 and the fourth terminal t4 are electrically connected. As a result, the attachment member 4 and the terminal plate 81 are electrically connected via the conductive plate 320.

  Note that the member to which the fourth terminal t4 is electrically connected via the grounding bar 500 need not 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 grounding bar 500 is a metal plate, an electric wire or the like.

  Further, although the fourth terminal t4 is electrically connected to the ground terminal 11 via the grounding bar 500, the present invention is not limited to this. The fourth terminal t4 may be electrically connected to a ground terminal different from the ground terminal 11 through the grounding bar 500. 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. There may be at least one quick connection terminal 80 constituting the third terminal t3. In addition, FIG. 6 has shown the external appearance of the branch switch 3 which has only one quick connection terminal which comprises the 3rd 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 connection terminal of the branch switch 3 shown in FIG. 6 prevents or releases the electric 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 the present invention is not limited to this.

  The switch of this embodiment should just have at least the function (disconnection function) which opens and closes a switch when electricity is not flowing. For example, the switch is a circuit breaker, a switch that does not have a break function, or a disconnector. For example, the switch according to the present embodiment may be applied to an earth leakage circuit breaker (ELB) and a circuit breaker for MCB (MCB: Molded Case Circuit Breaker). In addition, the distribution board 1 may have a configuration in which one or more MCBs and one or more ELBs are mixed and stored in the cabinet 10. As a result, integrated grounding can be achieved while simplifying the work of connecting the ground branch line 203.

  In this 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 only needs to be provided in two of the three slits 35. That is, the insertion order of the conductive bars 5 inserted into the three slits 35 is not fixed in the order shown in FIG. The blade receiving member 36 may be provided according to the insertion order of the conductive bars 5.

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

  In addition, although the slits 35 and 35a are provided to insert 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 port 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 point 31, the third terminal t3, the fourth terminal t4, and the connection circuit. (Short circuit 32) and case 30 are provided. A first electric wire (conductive bar 5) to which a power source (commercial power source 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 portion 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 (grounding bar 500) connected to a ground terminal (for example, the ground terminal 11). The connection circuit (short circuit 32) connects (shorts) between the third terminal t3 and the fourth terminal t4. The case 30 holds (accommodates) the first terminal t1, the second terminal t2, the third terminal t3, the fourth terminal t4, the contact portion 31, and the connection circuit (short circuit 32). The case 30 has an insertion port (for example, a slit 35a) for inserting a third electric wire that electrically connects the fourth terminal t4 and the ground terminal.

  Further, 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, the third electric wire (grounding bar 500) may be inserted into the slit 35a. Therefore, the grounding work can be facilitated.

  In addition, 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 multi-core VV lines (vinyl insulated vinyl sheath cables), 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 the ground terminal via a ground member (attachment 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 simply 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 terminal t4 provided in each of the plurality of branch switches 3 is electrically connected to the ground member (mounting member 4). The mounting member 4 can also serve as a concentrated ground terminal. Therefore, it is not necessary to provide a concentrated ground terminal separately from the attachment member 4.

  In addition, the distribution board 1 of the present embodiment includes the above-described switch (branch switch 3) and a cabinet 10 that houses the switch (branch switch 3).

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

  By connecting the ground branch line 203 to the fourth terminal t4 provided in the branch switch 3, the ground branch line 203 is grounded via the concentrated ground terminal of the distribution board 1.

1 Distribution board 3 Branch switch (switch)
4 Mounting member (grounding member)
5 Conductive bar (bus, first wire)
10 cabinet 11 ground terminal 30 case 31 contact part 32 short circuit (connection circuit)
35 slit 35a slit (insertion slot)
100 Commercial power supply
80 Quick connection terminal (3rd terminal)
202 Branch line (second electric wire)
203 Ground branch line 500 Grounding bar (third wire)
t1 1st terminal t2 2nd terminal t3 3rd terminal t4 4th terminal

Claims (3)

A first terminal to which a first electric wire electrically connected to a power source is connected;
A second terminal to which a second electric wire electrically connected to the load is connected;
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 for holding the first terminal, the second terminal, the third terminal, the fourth terminal, the contact portion, and the connection circuit;
The switch is characterized in that the case has an insertion port for inserting a third electric wire for electrically connecting the fourth terminal and the ground terminal. The ground terminal is provided on a distribution board,
The switch according to claim 1, wherein the third electric wire is electrically connected to the ground terminal via a ground member provided on the distribution board. The switch according to claim 1 or 2,
A distribution board comprising a cabinet for storing the switch.

Images