JP2009207237A - Distribution switchboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution switchboard, wherein the value of current passed through each branch circuit breaker can be precisely gasped, wrong connection of electric wires can be suppressed, and when a branch circuit breaker is replaced, the replacing work is facilitated. <P>SOLUTION: A master circuit breaker and a circuit breaker mounting plate 5 are installed on a base 3. Conductor bars 16 to 18 electrically connected to the master circuit breaker are fixed on the circuit breaker mounting plate 5 and the branch circuit breakers 21, arranged along the conductor bars and electrically connected to the conductor bars are detachably installed. Each branch circuit breaker 21 incorporates a current transformer 31, in an enclosure 21a provided with a load wire connecting portion and has a terminal block (signal output end) 33 electrically connected to the current transformer 31. A power measuring instrument for measuring the output current of each current transformer 31 is installed on the base 3. A wiring means 41 for electrically connecting the terminal block 33 of each branch circuit breaker 21 and the power measuring instrument is wired on the back side of the circuit breaker mounting plate 5 through the gap G formed between it and the inner surface of the base 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a distribution board used in a house or a store.

  Conventionally, a branch breaker mounting plate is screwed to a fixed base of a base, and a main breaker and a conductive bar electrically connected thereto are mounted on the mounting plate, and are disposed at right angles to the conductive bar. There is known a distribution board in which a plurality of branch breakers electrically connected to a bar are detachably arranged (see, for example, Patent Document 1).

In general, the distribution board is a single-layer three-wire type, and the branch breaker is selected for 100V or 200V depending on the relationship between the conductive bar connected to the main breaker and the branch breaker connected to the conductive bar. The selected 100V or 200V electric power is supplied to the load device by a load wire connected to the load line connecting portion of the branch breaker (for example, see Patent Document 2).
JP 2006-136069 A (paragraphs 0016-0042, FIGS. 1 to 6) JP 2006-253158 A (paragraphs 0014-0018, 0034-0037, 0039, FIGS. 1 to 5)

  The distribution boards of Patent Documents 1 and 2 can distribute the power supplied to the load device by a plurality of branch breakers provided in the distribution boards. However, the current value flowing through each of the branch circuits including the branch breakers is determined. I can't know. This is due to the fact that the distribution boards of Patent Documents 1 and 2 do not have a function of measuring the load current supplied to the load device through the branch breakers one by one.

  In order to cope with this, an ammeter that directly measures the load current may be incorporated in each branch breaker, but the ammeter corresponding to the load current is not only expensive but also quite large. Therefore, the branch breaker incorporating this must be large, which is not preferable in that the entire distribution board becomes large.

  By the way, a current transformer (abbreviated as CT) that converts a current of a large current circuit into a small current necessary for a meter is known instead of directly measuring a load current. If incorporated in the branch breaker, the above-described enlargement can be avoided or suppressed. Further, since the CT only converts the magnitude of the current, in order to monitor the converted current, a power measuring instrument that measures the converted small current as a current value is required. Since this electric power measuring device measures the small electric current supplied to it as a current value, it is not so large and can be incorporated in a distribution board.

  However, when configuring a distribution board including a power measuring instrument in addition to a branch breaker having a built-in CT, the following problems can be considered. That is, two load wires are connected to each branch breaker. On the other hand, the CT built in each branch breaker has output wires (signal wires) connected to both ends of its secondary winding, and these two output wires are wired in the direction in which each branch breaker is aligned. Connected to the power meter.

  In such a wiring state, a large number of wires are directly overlapped in the distribution board and wired randomly. Therefore, not only the inside of the distribution board is unsightly, but also the possibility of erroneous connection of these wires increases, and noise is superimposed on the output wires due to the large current flowing through the load wires, so that the current value can be known properly There is a risk that it will not be possible. In addition, when it is necessary to replace a failed branch breaker among the plurality of branch breakers arranged side by side, the output wires that are routed across each branch breaker tend to be in the way. This will increase the time and labor required for replacement.

  An object of the present invention is to provide a distribution board that can accurately know the value of the current flowing through each branch breaker, that can suppress a connection error of an electric wire, and that can be easily operated when the branch breaker is replaced. There is to do.

  According to the first aspect of the present invention, there is provided a base; a main breaker disposed on the base; a breaker mounting plate fixed to the base with a gap between the base and an inner surface of the base; and electrically connected to the main breaker A conductive bar connected to the breaker mounting plate and having a signal output end electrically connected to the current transformer and having a built-in current transformer in the housing; and a load A plurality of branch breakers provided with an electric wire connecting portion, arranged along the conductive bar and detachably mounted on the breaker mounting plate, and electrically connected to the conductive bar in this mounted state. The branch breaker; a power measuring instrument disposed on the base for measuring an output current of the current transformer; and the power measuring instrument wired through the gap formed on the back side of the breaker mounting plate; Said It is characterized by comprising a; and wiring means electrically connecting the signal output terminal.

  In the present invention, the main breaker and the power measuring instrument may be arranged directly fixed to the base, or may be arranged on the base via the mounting plate by being fixed on the breaker mounting plate. Good. In this invention, the power meter does not ask whether or not there is a current value display unit that displays the current value measured by the power meter, but when the power meter does not have a current value display unit, the power meter The measured value measured in (1) may be sent by wire or wirelessly to a display device arranged outside the distribution board for display. In the present invention, the wiring means is not limited to the one provided with the printed wiring board as described in the embodiment, for example, formed by an electric wire connected by inserting one end into the signal output end of the branch breaker, for example. It is also possible to do. In the present invention, the position of the signal output end with respect to the case of the branch breaker is not limited to the back side of the case as described in the embodiment. It can be provided at any position such as the side of the body.

  In the first aspect of the invention, the current supplied to the load device via each branch breaker is detected as a small current by the current transformer in the branch breaker, and the value of the detected current is measured by the power meter. The value of the current flowing through the breaker can be known.

  Furthermore, in the invention of claim 1, the load means connected to each of the load wire connecting portions of each branch breaker, and the wiring means connecting the signal output end of each branch breaker and the power measuring instrument are provided on the breaker mounting plate. Since the wiring can be performed separately on the front side and the back side, they are not directly overlapped with each other.

  Therefore, not only the inside of the distribution board does not become unsightly, but also the possibility of erroneous connection between these load wires and wiring means is reduced, and the current reaching the power meter through the wiring means due to the large current flowing through the load wires Since no noise is superimposed on the current value, the current value can be accurately measured with a power meter. In addition, since the wiring means electrically connected to the current transformer is not wired across the branch breakers provided side by side, the failed branch breaker is replaced among the plurality of branch breakers. When necessary, the wiring breaker is not obstructed when the branch breaker is replaced, and the branch breaker can be easily replaced.

  According to a second aspect of the present invention, in the first aspect of the present invention, the wiring breaker connecting to the gap is provided on the breaker mounting plate, the signal output end is provided on the rear surface of the casing, and the branch breaker is provided. The signal output end is opposed to the wiring through portion in a state of being mounted on the breaker mounting plate, and the wiring means connected to the signal output end is passed through the wiring through portion and wired in the gap. It is characterized by that. In the present invention, the wiring through portion can be formed by a hole opened in the breaker mounting plate or a groove opened to the side edge of the breaker mounting plate.

  According to the second aspect of the present invention, the wiring means is passed through the wiring passage portion of the breaker mounting plate directly behind the branch breaker, and the signal output terminal electrically connected to the current transformer built in the branch breaker is provided. Therefore, it is possible to arrange a plurality of branch breakers in a compact manner without requiring a space for wiring means between adjacent branch breakers. Moreover, it is not necessary to route the wiring means so as to go around the periphery of the breaker mounting plate so that wiring is performed on the back side of the breaker mounting plate, so that the wiring means can be easily wired.

  A third aspect of the present invention is the method according to the second aspect, wherein the signal output end includes a terminal plate exposed on a back surface of the housing, and the wiring means is passed through the wiring passage portion and is connected to the breaker mounting plate. A contact portion that is elastically brought into contact with the terminal board in a state in which the branch breaker is attached is provided. In the invention of claim 3, “elastically contacted” means that the terminal plate or the contact portion is configured to be elastically deformable, and the terminal plate or the contact portion is elastically deformed and contacted with the branch breaker attached. Pointing to do.

  In the invention of claim 3, as the branch breaker detachable from the breaker mounting plate is attached to the breaker mounting plate, the contact portion of the wiring means is brought into elastic contact with the terminal plate on the back surface thereof. The wiring means can be electrically connected. On the contrary, as the branch breaker is removed from the breaker mounting plate, the terminal plate of the branch breaker is separated from the contact portion of the wiring means, and the electrical connection is broken. As described above, the electrical connection between the terminal plate of the branch breaker and the wiring means and the release thereof can be performed with the attachment and detachment of the branch breaker without requiring any special work, so that the branch breaker can be replaced more easily.

  According to the distribution board of the invention of claim 1, while being able to know the value of the current flowing through each branch breaker accurately, it is possible to suppress an erroneous connection of electric wires, and when the branch breaker is replaced, the work is performed. There is an effect that it is easy.

  According to the invention of claim 2, the invention of claim 1 is further advantageous in that a plurality of branch breakers can be arranged in a compact manner and the wiring means can be easily wired.

  According to the invention of claim 3, in the invention of claim 2, there is an effect that the branch breaker can be replaced more easily.

  A residential distribution board according to an embodiment of the present invention will be described with reference to FIGS.

  Reference numeral 1 in FIG. 1 denotes a distribution board. The distribution board 1 includes a base 3, a breaker mounting plate 5, a main breaker 11, conductive bars 16 to 18, a plurality of, for example, ten branch breakers 21, a power meter 35, and wiring means 41. It has.

  The base 3 is made in a box shape whose front surface is opened by a synthetic resin, and is fixed to a vertical wall surface of a house. A synthetic resin cover (not shown) covering the front opening of the base 3 is detachably fitted and attached.

  The breaker mounting plate 5 is made of a metal plate that is smaller and shorter than the base 3, and is fixed to the base 3 so as to be offset toward one end in the longitudinal direction of the base 3. The breaker mounting plate 5 is supported by a plurality of base portions (not shown) that project forward from the inner surface of the base 3. Therefore, a gap G is formed between the back surface of the breaker mounting plate 5 and the inner surface of the base 3 facing the breaker mounting plate 5 as shown in FIG.

  As shown in FIGS. 2 and 4, the breaker mounting plate 5 is provided with a first locking portion 6 and a second locking portion 7 in pairs. A plurality of pairs of first locking portions 6 and second locking portions 7 that are paired are provided, and these are provided at regular intervals along the longitudinal direction of the breaker mounting plate 5. In the present embodiment, a plurality of sets of first locking portions 6 and second locking portions 7 are provided on both sides of the width direction central portion of the breaker mounting plate 5, respectively. This may be provided only on one side.

  The 1st latching | locking part 6 is provided near the side edge extended in the longitudinal direction (FIG. 1 up-down direction) of the breaker attachment board 5. As shown in FIG. The first locking portion 6 is cut and raised so as to be elastically deformable with the root 6a as a fulcrum. As shown in FIG. 4, the free end portion of the first locking portion 6 forms a locking end portion 6 b that is bent so as to be substantially perpendicular or oblique (not shown) to the surface of the breaker mounting plate 5. Thus, the tip of the locking end portion 6b is in a hole 5a made up of a trace of the first locking portion 6 being cut and raised.

  The second latching portion 7 is spaced from the first latching portion 6 and is provided symmetrically with the first latching portion 6 toward the center in the width direction of the breaker mounting plate 5. Therefore, the 2nd latching | locking part 7 is also cut and raised so that it can be elastically deformed by using the base 7a as a fulcrum. At the same time, as shown in FIG. 4, the free end portion of the second locking portion 7 is bent at a substantially right angle or oblique (not shown) with respect to the surface of the breaker mounting plate 5. And the tip of the locking end portion 7b is also in the hole 5b formed by the trace of the second locking portion 7 cut and raised.

  As shown in FIGS. 2 and 4, the breaker mounting plate 5 has stoppers as many as the number of sets formed by the first locking portions 6 and the second locking portions 7 on the side edges extending in the longitudinal direction. 5c. These stoppers 5c are bent and formed so as to individually face the locking end portion 6b of the first locking portion 6.

  The breaker mounting plate 5 has a plurality of wiring through portions 8. These wiring through portions 8 are formed of holes opened between the first locking portions 6 and the second locking portions 7. In the present embodiment, the number of wiring through portions 8 formed of these holes is the same as the number of sets formed by the first locking portions 6 and the second locking portions 7. However, as long as the strength of the breaker mounting plate 5 does not hinder the strength, the wiring through portion 8 is continuous in the longitudinal direction of the breaker mounting plate 5 so as to cover a plurality of the sets, and the number is smaller than the number of the sets. It is also possible to provide the wiring through portion 8.

  As shown in FIG. 1, a main trunk is formed on the surface of one end portion in the longitudinal direction of the breaker mounting plate 5 that is out of the region where the first locking portion 6, the second locking portion 7, and the wiring through portion 8 are provided. The breaker 11 is fixed. A primary-side terminal portion (not shown) of the main breaker 11 is connected to a three-phase single-wire power line (not shown) drawn inside the base 3, and commercial power of 100 V / 200 V is supplied by this power line. It is like that.

  As shown in FIG. 1, a conductive bar device 15 is fixed to the surface of the breaker mounting plate 5. The conductive bar device 15 extends in the direction in which the second locking portion 7 group is arranged, and the branch breaker connecting portion 15a disposed along the second locking portion 7 group, and the main breaker 11 and the branch breaker connecting portion 15a. A cover portion 15b extending to the secondary terminal portion (not shown) is provided.

  As shown in FIG. 4, the branch breaker connection portion 15 a includes a first conductive bar 16 to a third conductive bar 18. The first conductive bar 16 to the third conductive bar 18 are arranged so as to overlap each other with an interval so as to be electrically insulated from each other. The first conductive bar 16 disposed between the second conductive bar 17 and the third conductive bar 18 is for the neutral electrode, and faces the one surface of the first conductive bar 16 so as to face upward in FIG. The arranged second conductive bar 17 is for one voltage electrode, and the third conductive bar 18 arranged on the lower side in FIG. 4 facing the other surface of the first conductive bar 16 is for the other voltage electrode. It is.

  The cover portion 15b has conductive members (not shown) made of electric wires or conductive plates individually corresponding to the first conductive bar 16 to the third conductive bar 18 on the inner side thereof. The secondary terminal portion of the main breaker 11 and the first conductive bar 16 to the third conductive bar 18 are individually and electrically connected via these conductive members.

  Each branch breaker 21 is arranged along the branch breaker connecting portion 15 a having the first conductive bar 16 to the third conductive bar 18 and is detachably mounted on the surface of the breaker mounting plate 5. The breaker mounting plate 5, and the main breaker 11, the conductive bar device 15, and the branch breakers 21 arranged thereon form a breaker unit.

  Each branch breaker 21 attached to the breaker mounting plate 5 is electrically connected to two of the first conductive bar 16 to the third conductive bar 18.

  For this purpose, as shown in FIGS. 2 and 4, three grooves 22 are formed at the end of a thin casing 21a with a narrow width provided in the branch breaker 21, and two of these grooves 22 are not shown in the figure. Terminals are arranged. When the load side is 100V wiring, one connection terminal is disposed in the groove 22 at the intermediate height position in FIGS. 2 and 4, and the other upper groove or the lower position groove 22 in FIGS. One connection terminal is arranged, and these are connected to the first conductive bar 16 and the second conductive bar 17 or the third conductive bar 18. As a result, 100V wiring can be obtained. When the load side is 200V wiring, the connection terminals are arranged in the uppermost groove 22 and the lowermost groove 22 in FIGS. 2 and 4, respectively, and these are the second conductive bar 17 and the third conductive bar. By connecting to the bar 18, 200V wiring can be obtained.

  The casing 21 a has a recess 23, a first engagement portion 24 that defines one end of the recess 23, and a second engagement portion 25 that defines the other end of the recess 23 on the back surface thereof. . The first engagement portion 24 can be engaged with and disengaged from the engagement end portion 6 b of the first engagement portion 6, and the second engagement portion 25 is an engagement end portion of the second engagement portion 7. 7b can be engaged and disengaged.

  As shown in FIG. 4, the first engagement portion 24 and the locking end portion 6b are engaged, and the second engagement portion 25 and the locking end portion 7b are engaged, whereby each branch breaker is engaged. 21 is mounted on the breaker mounting plate 5. In this embodiment, as shown in FIG. 1, ten branch breakers are attached to both sides of the branch breaker connection portion 15a in two groups of five. The recess 23 of the branch breaker 21 attached to the breaker mounting plate 5 is opposed to the wiring through portion 8 of the breaker mounting plate 5. When each branch breaker 21 is attached to and detached from the breaker mounting plate 5, the first locking portion 6 and the second locking portion 7 are once elastically deformed in a direction to be immersed in the hole 5 a or the hole 5 b. To the position where the second engaging portion 25 or the locking end portion 7b is engaged.

  2 denotes a lock body attached to the end of the casing 21a at a position opposite to the end of the casing 21a in which the groove 22 is formed. The lock body 26 is pushed down and locked to the stopper 5c in a state where the branch breaker 21 is mounted on the breaker mounting plate 5, whereby the branch breaker 21 is held at a predetermined mounting position. Therefore, when removing the branch breaker 21 from the breaker mounting plate 5, the lock body 26 is pulled up and removed from the stopper 5c.

  A circuit breaker (not shown) for blocking overcurrent is housed in the casing 21 a of the branch breaker 21. As shown in FIG. 2, a load wire connecting portion 27 is provided at an end portion of the housing 21 a to which the lock body 26 is attached, and a release lever 28 is attached. The load wire connecting portion 27 is provided on the upper side of the lock body 26 in FIG. 2, and a load wire (not shown) wired on the load side is inserted and connected thereto. The release lever 28 is provided on the upper side of the load wire connecting portion 27 in FIG. 2, and is rotated and arranged at a release position indicated by a two-dot chain line in FIG. 4 to load the load wire to the load wire connecting portion 27. Can be inserted and removed. In addition, while the arrow in FIG. 2 has shown the direction where a load electric wire is inserted / removed, the code | symbol 29 in FIG.2 and FIG.4 has shown the breaker handle.

  For example, a through-type current transformer 31 that is abbreviated as CT (Current Transformer) is built in each of the casings 21a of each branch breaker 21 (see FIGS. 2 and 4). The built-in current transformer 31 does not increase the size of the branch breaker 21. The current transformer 31 detects the load current supplied to the load device via the branch breaker 21 as a small current. The primary conductor included in the current transformer 31 is connected to one of the two connection terminals, and both ends of the secondary winding through which the primary conductor penetrates (in other words, a pair of secondary conductors included in the current transformer 31). Each of the side terminals is connected to a pair of terminal plates 33 that form signal output ends via the breaker wiring 32.

  As shown in FIG. 4, the pair of terminal plates 33 are fixed to the bottom wall portion of the housing 21 a and are exposed in the recess 23 toward the back side of the housing 21 a. At the same time, as shown in FIG. 2, the pair of terminal plates 33 are arranged in the width direction of the housing 21 a and extend along the longitudinal direction of the recess 23. However, these terminal boards 33 can be arranged in a direction perpendicular to the arrangement of FIG. 2 and arranged side by side in the longitudinal direction of the housing 21a.

  As shown in FIG. 1, the power meter 35 is fixed to the base 3 on the extension line in the arrangement direction of the branch breakers 21 and on the opposite side of the main breaker 11 with the branch breaker 21 group as a boundary. . The power meter 35 measures the output current of each current transformer 31. The power meter 35 has a current value display unit 36 that displays the value of the measured output current at the middle in the vertical direction, and at least one of the upper and lower sides of the current value display unit 36. The input terminal portions 37 and 38 are preferably provided on both the upper and lower sides. In FIG. 1, the group of five branch breakers 21 in the lower position is disposed at substantially the same height as the input terminal section 37 in the lower position, and the lower position in the same manner as the input terminal section 38 in the upper position. These five branch breakers 21 are arranged at substantially the same height.

  The wiring means 41 for electrically connecting the input terminal portions 37 and 38 of the power meter 35 and the terminal plate 33 of each branch breaker 21 has a plurality of branch breakers 21 divided into two groups as described above. Corresponding to this, two systems are provided. These wiring means 41 include a printed wiring board 42, a plurality of contact portions 43, a plurality of first connectors 44, and a plurality of electric wires 46 with a second connector 45.

  As shown in FIGS. 2 and 3A, the printed wiring board 42 is provided with a plurality of predetermined pattern wirings 42a made of copper foil on the surface of an insulating plate. A pair of pattern wirings 42 a is prepared for one branch breaker 21.

  The contact portion 43 is individually connected to one end of each pattern wiring 42 a and fixed to the printed wiring board 42. The contact portion 43 is made of, for example, a conductive leaf spring, and one end of the contact portion 43 is connected to the pattern wiring 42a as shown in FIGS. 3B and 4 and the other end is separated from the printed wiring board 42. Yes. Therefore, the contact portion 43 can be elastically deformed in a direction approaching the printed wiring board 42.

  Note that the contact portion 43 may be the one shown in FIG. The contact portion 43 in FIG. 5 (A) is formed of a conductive leaf spring having flat connection end portions extending at both ends of an arc portion that protrudes upward in the figure, and the connection end portion is connected to the pattern wiring 42a. Connected to the printed wiring board 42. The arc portion of the contact portion 43 can be elastically deformed downward by being pushed from above.

  5B includes a holder 43a made of a cylinder whose upper and lower ends are open and whose upper end opening is narrowed in FIG. 5B, a conductive spring 43b accommodated therein, and this spring. The conductive ball 43c is urged upward by 43b in FIG. 5B and supported by the holder 43a. The ball 43c is held so as not to come out of the narrowed opening of the holder 43a, and the upper portion of the ball 43c protrudes from the opening. The ball 43c is movable toward the printed wiring board 42 with the elastic deformation of the spring 43b by being pushed from above. The spring 43b is in contact with the pattern wiring 42a, and the pattern wiring 42a and the ball 43c are electrically connected via the spring 43b.

  The plurality of first connectors 44 are female electrical connectors, and are individually connected to the other ends of the pattern wirings 42a, and at the edges of the printed wiring board 42 as shown in FIG. It is fixed side by side. The plurality of first connectors 44 may be individually divided, but it is preferable to connect them to the second connector 45 with one touch by continuously forming a single male connector device.

  The second connector 45 is a male electrical connector that is detachably inserted and connected to the first connector 44, and is connected to one end of the insulated wire 46. It is preferable that these second connectors 45 are also continuously integrated into a single male connector device. The plurality of electric wires 46 are divided into two groups, and the other ends thereof are inserted and connected to either the input terminal portion 37 or 38 of the power meter 35.

  In the wiring of these electric wires 46, in this embodiment, the wiring means 41 is divided into two systems as described above, and the electric power having the input terminal portions 37 and 38 at height positions corresponding to these systems individually. The measuring instrument 35 is disposed on the extension line of the branch breakers 21 in the arrangement direction, and the electric wires 46 are separately inserted and connected to the input terminal portions 37 and 38 at the corresponding height positions as shown in FIG. . In this way, the wiring of the electric wires 46 is performed separately for each system, so that the wiring work is easier and can be connected as compared with the case where all the input terminal portions are collected on the upper or lower portion of the power measuring instrument 35. This is preferable in that the possibility of mistakes is reduced and the length of the electric wire 46 can be shortened.

  As shown in FIG. 3A, the pair of printed wiring boards 42 arranged on both sides of the branch breaker connecting portion 15a are arranged on the back side of the breaker mounting plate 5, that is, in the gap G as shown in FIG. Yes. The end of the printed wiring board 42 to which the first connector 44 is attached protrudes toward the power meter 35 without being covered by the breaker attachment plate 5 as shown in FIG. The printed wiring board 42 is fixed to a substrate mounting portion (not shown) provided on the base 3 or the back surface of the breaker mounting plate 5. The printed wiring board 42 is disposed in the gap G in advance prior to the wiring of the electric wires 46, and the electric wires 46 are retrofitted at the construction site of the distribution board 1.

  As described above, the printed wiring board 42 of the wiring means 41 is disposed in the gap G, so that each of the contact portions 43 passes through the wiring passage portion 8 provided on the breaker mounting plate 5 corresponding thereto. (See FIG. 4). These contact portions 43 are in a free state when the branch breaker 21 is not attached to the breaker mounting plate 5, and when the branch breaker 21 is attached to the breaker mounting plate 5, the contact portions 43 are caused by the terminal plate 33 of the branch breaker 21. It is elastically deformed and is held in a state of elastic contact with the terminal board 33.

  Therefore, the current detected by the current transformer 31 built in the branch breaker 21 and supplied to the terminal plate 33 through the breaker wiring 32 flows from the contact portion 43 through the pattern wiring 42 a to the first connector 44. Furthermore, since it is supplied to the power meter 35 through the electric wire 46 having the second connector 45 connected to the first connector 44, the power meter 35 measures the current value and Is displayed on the current value display unit 36.

  The distribution board 1 described above includes a plurality of branch breakers 21 with built-in current transformers 31 and a power measuring device 35. Therefore, in this distribution board 1, the load current (primary current) supplied to the load device via the branch breaker 21 is converted into a small current (secondary current whose value is smaller than the primary current) by the current transformer 31. Since the power meter 35 measures the value of the current thus detected, the value of the current flowing through each branch breaker 21 can be known.

  Further, in this distribution board 1, load wires (not shown) connected to the load wire connection portions 27 of the branch breakers 21 are positioned on the front side of the breaker mounting plate 5 to which the branch breakers 21 are attached. Wired. On the other hand, the wiring means 41 that electrically connects the terminal plate 33 of each branch breaker 21 and the power measuring instrument 35 is routed through a gap G formed between the breaker mounting plate 5 and the base 3. Wired.

  In this way, a part of the wiring means 41, that is, the wiring portion facing the breaker mounting plate 5 and the load electric wire are wired separately on the front side and the back side of the breaker mounting plate 5, and are provided side by side. Since the wiring means 41 does not cross over the branch breakers 21 that are present, the load electric wire and the wiring means 41 do not directly overlap and are not randomly wired.

  Therefore, the inside of the distribution board 1 does not become unsightly. Not only that, the possibility of erroneous connection between these load wires and the wiring means 41 is reduced. At the same time, noise is prevented from being superimposed on the current reaching the power measuring instrument 35 through the wiring means 41 due to a large current flowing through the load wire, so that the current value can be accurately measured by the power measuring instrument 35.

  And since the wiring means 41 electrically connected to the current transformer 31 is not wired across the branch breakers 21 arranged side by side as described above, the plurality of branch breakers 21 When it becomes necessary to replace the broken branch breaker 21, the wiring means 41 does not get in the way of replacing the branch breaker 21. Thereby, the branch breaker 21 can be easily replaced without requiring the trouble of removing the wiring means 41 so as not to get in the way.

  Moreover, the contact portion 43 which is a part of the wiring means 41 is passed through the wiring passage portion 8 of the breaker mounting plate 5 directly behind each branch breaker 21 to the contact portion 43 and the current transformer 31 incorporated in the branch breaker 21. Electrical connection with the electrically connected terminal board 33 is made. Thereby, the wiring means 41 is not wired to the side of the casing 21a of the branch breaker 21. Therefore, since a space for arranging the wiring means 41 between the adjacent branch breakers 21 is not required, a plurality of branch breakers 21 can be arranged in a compact manner, and the distribution board 1 can be prevented from becoming large. In addition, since the contact portion 43 of the wiring means 41 is passed through the wiring through portion 8 of the breaker mounting plate 5, the wiring means 41 is routed around the periphery of the breaker mounting plate 5 and wired to the back side of the breaker mounting plate 5. Therefore, the wiring means 41 can be easily wired.

  Further, as the branch breaker 21 detachably attached to the breaker mounting plate 5 is attached to the breaker mounting plate 5, the contact portion 43 of the wiring means 41 comes into elastic contact with the terminal plate 33 provided on the back surface thereof, so that the terminal The board 33 and the wiring means 41 are electrically connected. On the contrary, as the branch breaker 21 is removed from the breaker mounting plate 5, the terminal plate 33 of the branch breaker 21 is separated from the contact portion 43 of the wiring means 41, and the electrical connection therebetween is cut off. Therefore, when the branch breaker 21 is replaced, the branch breaker 21 can be attached / detached without requiring the connection between the branch breaker 21 and the wiring means 41 and the trouble of releasing the connection. Therefore, the branch breaker 21 can be replaced more easily. .

  The wiring means 41 includes a printed wiring board 42 disposed on the back side of the breaker mounting plate 5. For this reason, when the wiring means 41 is wired on the back side of the breaker mounting plate 5, there is no trouble of wiring the wires one by one as in the case where the wiring means 41 is composed of a plurality of wires, and a wiring error is caused. The possibility is reduced, and furthermore, since wiring on the back side of the breaker mounting plate 5 can be performed at once, the wiring means 41 can be easily wired on the back side of the breaker mounting plate 5.

  In addition, a first connector 44 is attached to the printed wiring board 42, and the electric wire 46 connected to the power meter 35 has a second connector 45. The connector 45 can be connected. Therefore, by connecting the first connector 44 and the second connector 45, the printed wiring board 42 and the power measuring instrument 35 are connected in electrical connection. This can be done easily without the troublesome work.

The front view which shows the distribution board which concerns on one Embodiment of this invention in the state which removed the cover. The perspective view which decomposes | disassembles and shows a part of distribution board of FIG. (A) is a front view which shows a part of wiring means of the distribution board of FIG. FIG. 3B is a cross-sectional view taken along line F3B-F3B in FIG. Sectional drawing which shows a part of distribution board of FIG. (A) (B) is sectional drawing which shows each different contact part which can be used for the wiring means with which the distribution board of FIG. 1 was equipped.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Distribution board, 3 ... Base, 5 ... Breaker mounting plate, G ... Gap, 8 ... Wiring passage part, 11 ... Master breaker, 15 ... Conductive bar apparatus, 15a ... Branch breaker connection part, 16-18 ... Conductive bar 21 ... Branch breaker, 21a ... Case, 27 ... Load electric wire connection part, 31 ... Current transformer, 33 ... Terminal plate (signal output terminal), 35 ... Power measuring instrument, 41 ... Wiring means

Claims (3)

With the base;
A main breaker disposed on the base;
A breaker mounting plate fixed to the base with a gap between the inner surface of the base;
A conductive bar electrically connected to the main breaker and fixed on the breaker mounting plate;
A plurality of branch breakers having a signal output end electrically connected to the current transformer and having a load wire connection portion, the current transformer being built in the housing; The branch breaker arranged along the conductive bar and detachably mounted on the breaker mounting plate, and electrically connected to the conductive bar in this mounted state;
A power meter disposed on the base and measuring an output current of the current transformer;
Wiring means wired through the gap formed on the back side of the breaker mounting plate and electrically connecting the power meter and the signal output end;
A distribution board characterized by comprising:   A wiring through portion communicating with the gap is provided on the breaker mounting plate, and the signal output end is provided on a back surface portion of the housing, and the branch breaker is mounted on the breaker mounting plate. 2. The distribution board according to claim 1, wherein the signal output end faces the portion, and the wiring means connected to the signal output end is routed through the wiring through portion and wired in the gap. .   The signal output end comprises a terminal plate exposed on the back surface of the housing, and the wiring means is passed through the wiring through portion and the branch breaker is attached to the breaker mounting plate. The distribution board according to claim 2, further comprising a contact portion that is elastically contacted.

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