JP6083017B2 - Adapter for current measurement - Google Patents

Description

  The present invention relates to an adapter for current measurement. In the present invention, the current measuring adapter is a variety of adapters that are used by being mounted on a bus bar, a copper bar such as a lead bar, or a wire connected to an electrical device such as a breaker, In addition to the conventional function, it means one having a current measurement function.

  As a means for detecting the current flowing through the breaker, a technique for detecting a current by providing a terminal block incorporating a current transformer (CT) or a Hall element on the secondary side of the breaker (for example, Patent Document 1) is known. .

  However, in any conventional technology, in order to secure the storage space for CT, it is necessary to extend and enlarge the size of the terminal block and terminal cover in the depth direction of the breaker, and the size of the distribution board for storing the breaker is also required. There is a problem that the size is increased, and there is a problem that costs are increased due to the increase in size when the current detection means is added to the existing distribution board.

JP 2000-323202 A

  An object of the present invention is to solve the above-described problems and provide an adapter for current measurement that can be provided with current detection means at a low cost without increasing the size of the adapter body.

Current measuring adapter of the present invention has been made to solve the above problems, a plurality of concave-shaped wiring opening is opened at one end, in these wire openings, each located a plurality of side-by-side are formed by wire An adapter for current measurement that is used, wherein the adapter body has a pair of arms projecting from one end of the board and a wire insertion portion having an open end on the inside thereof, and A current sensor having a magnetic detection element disposed therein is incorporated, and a wiring insertion portion of the current sensor is disposed at a position corresponding to the wiring opening.

  According to a second aspect of the present invention, in the adapter for measuring current according to the first aspect, a wiring holding portion for holding the wiring is formed in the adapter main body.

In the adapter for current measurement according to the present invention, a pair of arm portions projecting from one end of the board are projected from the adapter body, and the inside thereof is used as a wire insertion portion having an open end portion. Since the current sensor in which the detection element is arranged is built- in and the wiring insertion portion of the current sensor is disposed at a position corresponding to the wiring opening, it is not necessary to separately secure a storage space dedicated to the current sensor. Therefore, according to the present invention, the current detection means for detecting the current flowing through the wiring to which the current measurement adapter is connected can be formed without increasing the size of the adapter body. Since it is possible to measure the current value of the attached wiring simply by inserting, it is possible to attach it without taking time and effort.

It is a perspective view of a current sensor (without a cover). It is a perspective view of a current sensor (with a cover). It is a figure explaining the flow of the electric current detection by a current sensor. It is explanatory drawing of the various apparatuses arrange | positioned in a distribution board. It is a perspective view of the adapter (Embodiment 1) carrying a branch breaker. It is a perspective view of the adapter (Embodiment 2) of the bar holder shape attached to the bus-bar used as wiring. It is an example of arrangement | positioning of the adapter of Embodiment 2 which measures the electric current of a branch breaker. FIG. 10 is a perspective view of a bar holder-shaped adapter (Embodiment 3) that is disposed at a secondary terminal portion of a main breaker to hold a lead bar serving as a wiring. It is a perspective view of the bar holder-shaped adapter used as the other Example of Embodiment 3. FIG. It is a perspective view of the adapter (Embodiment 4) which can be inserted from the side of the laminated | stacked bus-bar used as wiring. It is a perspective view of the other Example of Embodiment 4. FIG.

  Preferred embodiments of the present invention are shown below.

  The adapter for current measurement according to the present invention is an adapter for current measurement that is attached to a wiring composed of a copper bar such as a bus bar and a lead bar formed in a line and a wire, and is widely used in various forms. In the present invention, a substrate-like current sensor is provided in the current measuring adapter.

Here, the substrate-like current sensor 1 used in the present embodiment has a substantially U-shaped structure in which one end of the substrate 2 is opened to form a pair of arm portions 3 as shown in FIG. Yes, the magnetic detection element 4 is mounted on the pair of arms 3. Further, a portion formed by opening one end of the substrate 2 is a wiring insertion portion 3a through which the wiring is inserted. As shown in FIG. 2, the entire current sensor 1 having a substrate shape may be provided in the adapter for current measurement in a state of being covered with the cover 5. The substrate-like current sensor 1 used in the present invention is attached so that a pair of arm portions 3 straddles a wiring formed in the wiring insertion portion 3a.

  As shown in FIG. 3, the magnetic detection element 4 mounted on the current sensor 1 detects a magnetic field generated by a current flowing through the copper bar 13 serving as a wiring. The integrated circuit 6 that processes the detected output and calculates the value of the current flowing through the copper bar 13 is also mounted. In the present embodiment, one magnetic detection element 4 is mounted on each arm 3, but a plurality of magnetic detection elements 4 may be mounted. By mounting a plurality, it is possible to investigate the current flowing through the copper bar 13 more accurately.

  As described above, by using the substrate-like current sensor 1, it is possible to greatly reduce the arrangement space of the current sensor as compared with the case where the conventional core-shaped current sensor is used. In addition, in the conventional core-shaped current sensor, when installing the current sensor, it is necessary to pass wiring through the core-shaped current sensor. When CT is installed after the distribution board is installed, all branch breakers must be installed. However, the current sensor 1 used in the present invention has one end of the substrate 2 opened, although there is a problem that it takes time and labor for the assembly work. Therefore, even when various wirings are made after the distribution board is installed, the assembling work can be easily performed.

  Hereinafter, as Embodiments 1 and 2, a current measuring adapter that is attached to a bus bar 9 as a wiring formed by arranging a plurality of distribution boards 7 shown in FIG. 8 incorporated in the plug-in unit (Embodiment 1 shown in FIG. 5), and a bar holder-like one for holding the bus bar 9 that forms a plurality of wires arranged side by side (implementation shown in FIG. 6) The thing used for the form 2) is demonstrated.

  The distribution board 7 shown in FIG. 4 includes a main breaker 12, three bus bars 9 serving as wiring connected to the secondary side of the main breaker 12 via lead bars 11, and three bus bars 9. A large number of plug-in units are formed which include an adapter 15 mounted on the adapter 15 and a branch breaker 8 mounted on the adapter 15.

  The branch breaker 8 used in the distribution board 7 shown in FIG. 4 has a plurality of bus bars 9 formed side by side from the front side which is the side direction of the bus bar 9 of the distribution board 7. It is of the type that is inserted to form a branch circuit. A bar holder 10 that holds the bus bar 9 is arranged in the vertical direction of the branch breaker 8.

(Embodiment 1: Current sensor mounting structure in plug-in unit)
The adapter 15 of this embodiment can be mounted from the front side of the plurality of bus bars 9 formed on the distribution board 7 shown in FIG. 4, and has an electrical equipment mounting portion on which the branch breaker 8 can be mounted on the adapter 15. It is a formed plug-in unit.

  As shown in FIG. 5, the back surface of the adapter 15 on the side of the bus bar 9 is a cavity, and the adapter 15 is mounted on the adapter 15 with three plug terminals 16 that are connected to the bus bar 9. A branch lead bar 17 for electrically connecting the primary terminal portion of the branch breaker 8 and the plug terminal 16 is disposed.

  In addition, on both side surfaces of the lower end portion of the adapter 15, concave wiring openings 18 having one end opened are formed so that the three-phase bus bars 9 formed side by side can be inserted.

  By arranging the board-shaped current sensor 1 shown in FIG. 1 at a position corresponding to the wiring opening 18, a current detection function is added to the adapter 15. In the present embodiment, the current sensor 1 is disposed at the periphery of the wiring opening 18, but the board-shaped current sensor 1 is attached to the wall 15 a by extending the wall 15 a provided between the branch lead bars 17. It may be formed. According to this structure, the current sensor 1 can be formed without separately securing a storage space dedicated to the current sensor 1.

  In a state where the current sensor 1 is held at the periphery of the wiring opening 18, the magnetic detection element 4 mounted on the arm portion 3 of the current sensor 1 is fixed at a position sandwiching the bus bar 9 inserted through the wiring insertion portion 3 a. Is done. In this state, when a current flows through the bus bar 9, as shown in FIG. 3, a magnetic field is generated by the current, the magnetic field is detected by the magnetic detection element 4 (Hall element), and a voltage corresponding to the magnetic flux density is applied. Output from the Hall element. This voltage is amplified by an arithmetic circuit in the integrated circuit 6, and the amplified outputs of the magnetic detection elements 4 are combined to obtain a current from the output voltage.

  Here, if the mounting position of the bus bar 9 is different from the current sensor 1, the current sensor 1 is tilted or the positional relationship between the bus bar 9 and the magnetic detection element 4 is shifted, Since the detection error is affected, the current sensor 1 is preferably arranged so as not to cause backlash. Although details will be described later, specifically, a guide inclined portion 19 for inserting the bus bar 9 toward the center of the wiring opening 18 is formed at the side end of the wiring opening 18 through which the bus bar 9 is inserted. Accordingly, it is preferable that the bus bar 9 is formed at a desired fixed position (near the center line of the current sensor 1) with respect to the current sensor 1. In addition, the current sensor 1 that holds the current sensor 1 in a fixed position at the periphery of the wiring opening 18 is preferably provided with a locking means (not shown), thereby holding the current sensor 1 without rattling. . The shape of the current sensor 1 is substantially the same as the shape of the periphery of the concave wiring opening 18 with one end open.

  In addition, since it is necessary to supply power to the current sensor 1, in this embodiment shown in FIG. 4, a dedicated power supply bar 14 is formed in the distribution board 7 to supply power. . The means for supplying current to the current sensor 1 is not limited to this embodiment. For example, power can be directly supplied from the bus bar 9 for detecting current by the current sensor 1.

  As a method for measuring the value of the current flowing through the main breaker 12 mounted on the adapter 15 as in the present embodiment, a substrate-like shape is formed on the upstream side where the wiring opening 18 of the adapter 15 formed upstream is formed. The current sensor 1 is formed, the current value is detected by the current sensor 1, and the current value flowing through the main breaker 12 can be measured. Further, as a method of measuring the current value flowing through the branch breaker 8 mounted on the adapter 15, the substrate-like current sensors 1 are formed on both sides, and the current values of the upper and lower current sensors 1 are detected respectively. . The value of the current flowing through the branch breaker 8 can be obtained from the difference between the detected current values of the current sensor 1 located upstream and the current sensor 1 located downstream. In addition, the current sensor 1 is formed only at the upper and lower ends of the adapter 15, the similar adapter 15 is formed at an adjacent position, and the current value is obtained from the difference between the current sensors 1 formed in the respective adapters 15. Is possible.

  According to the adapter 15 comprising the plug-in unit of the present embodiment, the current detection means for detecting the current flowing through the bus bar 9 without changing the conventional size or appearance by arranging the current sensor 1 at the location. Can be added. Moreover, according to the said structure, when inserting in the bus-bar 9, it can work smoothly, without an electric current detection means becoming obstructive.

  In addition, the electric equipment attached to the upper surface of the adapter 15 is not limited to the branch breaker 8, For example, it can also be used as a terminal block.

(Embodiment 2: Current sensor mounting structure in a bar holder)
The adapter 20 of the present embodiment is in the shape of a bar holder for supporting the bus bar 9 as shown in FIG. 6 in the plug-in distribution board formed in FIG.

  As shown in FIG. 4, the bar holder-shaped adapter 20 of the present embodiment incorporating the current sensor 1 is arranged at the upper and lower ends like the upstream bar holder 10a and the downstream bar holder 10b, or shown in FIG. As described above, the branch breaker 8 can be disposed and used. In the case of the embodiment shown in FIG. 4, the upstream bar holder 10a is inserted from the front side in the side direction of the bus bar 9 serving as a wiring, and the movement of the bus bar 9 is restricted and formed in the upstream bar holder 10a. The current value of the main breaker 12 can be measured by the current sensor 1. In addition, as the current measurement using the adapter 20, in the case of the embodiment shown in FIG. 7, the current value is measured by each adapter 20, and the detected current value by the adapter 20a upstream of the branch breaker 8 and the midstream adapter are measured. The current value flowing through each branch breaker 8 can be obtained from the difference between the detected current values of 20c and the difference between the detected current values of the midstream adapter 20c and the downstream adapter 20b.

  Below, the shape of the adapter 20 is demonstrated. As shown in FIG. 6, a concave wiring opening 21 having one end opened is formed in the lower portion of the adapter 20 so that the three bus bars 9 serving as wiring can be inserted. The wiring opening 21 is used as a wiring holding portion that holds the bus bar 9 when the wiring opening 21 is attached to the bus bar 9. Further, the wiring holding portion serves as a restricting portion that restricts the movement of the bus bar 9.

  It is preferable that a guide inclined portion 22 for inserting the bus bar 9 toward the center of the wiring opening 21 is formed at the concave end portion.

  The peripheral edge of the concave wiring opening 21 formed in the adapter 20 is used as a current sensor holding portion, and the substrate-like current sensor 1 shown in FIG. The shape of the current sensor 1 is substantially the same as the shape of the periphery of the concave wiring opening 21 with one end open. The adapter 20 has a bottomless bottom so that the current sensor 1 can be attached from below.

  According to the bar holder-shaped adapter 20 of the present embodiment, the current sensor 1 is arranged in the adapter 20 to detect the current flowing through the bus bar 9 without changing the size and appearance of the conventional bar holder. Means can be added.

  Examples of other bar-holder adapters used in the distribution board will be described below as Embodiments 3 and 4.

(Embodiment 3: Mounting structure in a bar holder-shaped adapter formed on the secondary terminal portion of the main breaker 12)
As shown in FIG. 8, the adapter 23 according to the present embodiment has a bar holder shape that is disposed at the secondary terminal portion of the main breaker 12 in order to hold the lead bar 40. In the present embodiment, the lead bar 40 serving as the wiring is formed of iron, but the wiring may be formed of a wire or the like.

  On the upper part of the bar holder-shaped adapter 23, a concave distribution opening 24 is formed on the device mounting plate 50 so that one end on the front side is opened so that the lead bar 40 serving as wiring can be inserted. In the present embodiment, the recessed insertion wiring opening 24 with one end opened is a lead bar holding surface 25 that holds the bottom surface of the lead bar 40, and the lead of each phase while being held by the lead bar holding surface 25. It is comprised from the partition part 26 standingly arranged so that it may be arrange | positioned at the both sides | surfaces of the bar 40. FIG. The lower part of the bar holder-shaped adapter 23 is bottomless so that the current sensor 1 can be attached from below.

  The substrate-shaped current sensor 1 shown in FIG. 1 is arranged here using the peripheral edge of the concave wiring opening 24 as a current sensor holding portion. The shape of the current sensor 1 is substantially the same as the shape of the periphery of the concave wiring opening 24 with one end open.

  By incorporating the current sensor 1 into the bar holder-shaped adapter 23 arranged at the secondary terminal portion of the main breaker 12, the current value flowing through the lead bar 40 serving as the electric circuit can be measured, for example, the current of the main breaker 12 Measurement is possible. Furthermore, as shown in FIG. 9, by arranging a plurality of such adapters 23, it is possible to measure a current value of an electrical device such as a branch breaker installed between the adapters 23.

  In the structure as shown in FIGS. 8 and 9, if a deviation occurs in the positional relationship between the lead bar 40 and the magnetic detection element 31, the current detection error is affected. Therefore, in the present embodiment, a plurality of uneven portions 26 a are formed on the inner surface of the partition wall portion 26 as shown in FIG. 9, and the lead bar 40 is inserted toward the center of the wiring opening 24 by the uneven portions 26 a. In order to improve the current detection accuracy, the guide is held so as not to deviate from the fixed position after insertion. As described above, the concavo-convex portion 26a formed in the wiring opening 24 has a role as a wiring holding portion that holds the lead bar 40 and restricts movement when the lead bar 40 is attached. In addition, when using an electric wire or the like instead of the lead bar 40, or a lead bar having a narrow structure can be used, the electric wire or the narrow lead bar is held and regulated at a predetermined position. It is desirable to provide a separate wiring holding part separately.

(Embodiment 4: Mounting structure in a bar holder connected to the stacked bus bar from the left and right directions)
As shown in FIGS. 10 and 11, a bar holder-shaped adapter 28 that can be connected from the left and right directions of the stacked three-phase bus bar 60 and covers the side of the bus bar 60 is formed. A branch breaker 29 capable of plug-in connection is formed from the other end direction of the bus bar 60.

As shown in FIG. 10, the direction of the bus bar 60 of the adapter 28 is open and formed.
A concave wiring opening 30 having one end opened at a position corresponding to the bus bar 60 on the side surface of the upper and lower ends of the adapter 28 is formed. When the wiring opening 30 is attached to the bus bar 60, the wiring opening 30 holds the bus bar 60 and has a role as a wiring holding unit that restricts movement.

  The substrate-like current sensor 1 is formed at a position corresponding to the wiring opening 30 and the current flowing through the bus bar 60 is measured. The adapter 28 of the present embodiment forms the adapter 28 over the upper and lower ends of the bus bar 60, but may be formed by dividing the upper end, the lower end, and the center. In that case, you may form the current sensor 1 for every adapter formed by dividing.

  In any of the adapters shown above, by arranging the current sensor 1 inside the adapter, current detecting means for detecting the current flowing through the bus bar and the lead bar without changing the size and appearance of the conventional adapter is provided. The adapter can be attached to the attachment portion as in the conventional case. Therefore, according to the present invention, the current detection means connected to the current measurement adapter can be formed without increasing the size of the adapter body.

  In any of the embodiments, in the case of a three-pole breaker and a three-phase three-wire, the current sensor 1 is arranged on each of the three poles, and in the case of a single-phase three-wire, two current sensors 1 are provided on both voltage poles. In the case of a single-phase two-wire that is arranged and used for a two-pole breaker, one current sensor 1 may be inserted in one pole.

DESCRIPTION OF SYMBOLS 1 Current sensor 2 Board | substrate 3 Arm part 3a Wiring insertion part 4 Magnetic detection element 5 Cover 6 Integrated circuit 7 Distribution board 8 Branch breaker 9 Bus bar 10 Bar holder 10a Upstream bar holder 10b Downstream bar holder 11 Lead bar 12 Main breaker 13 Copper bar Wiring 14 Power supply bar 15 Adapter 15a Wall 16 Plug terminal 17 Branch lead bar 18 Wiring opening 19 Guide inclined part 20 Adapter 20a Upstream adapter 20b Downstream adapter 20c Midstream adapter 21 Wiring opening 22 Guide inclined part 23 Adapter 24 Wiring opening 25 Lead bar holding surface 26 Bulkhead 26a Uneven portion 27 Adapter 28 Adapter 29 Branch breaker 30 Wiring opening 40 Lead bar 50 Device mounting plate 60 Bus bar

Claims (2)

Providing a plurality of concave-shaped wiring opening is opened at one end, in these wire openings, a current measuring adapter used in each positions the plurality of side-by-side formed by the wiring,
The adapter body has a pair of arms projecting from one end of the board and a wiring insertion portion having an open end on the inside, and a current sensor in which a magnetic detection element is disposed in each of the arm portions. An adapter for current measurement, wherein a wire insertion portion of the current sensor is arranged at a position corresponding to the wiring opening. The adapter body, characterized by forming the wiring holding section for holding the wiring 請 Motomeko 1, wherein the current measuring adapter.