KR20190028259A - Current-voltage measuring instrument - Google Patents

Abstract

The present invention provides a current and voltage measuring device having excellent space efficiency when multiple devices are installed side by side on a board. Multiple terminals (32, 42) in two terminal blocks (3, 4) are individually installed in a vertical direction (y-direction) and arranged to be parallel with a space therebetween in a horizontal direction (x-direction), on the front surface (2f) on which the terminal blocks (3, 4) of a case (2) are installed. The first terminal block (3) in the two terminal blocks protrudes to the outer side more than the second terminal block (4) in a direction (z-direction) vertical to an installation surface of the board. Also, an outer part from the first terminal block (3) in the horizontal direction (x-direction) on the front surface (2f) is formed as a stepped surface (2f1) dented more to the inner side in the direction (z-direction) vertical to the installation surface than the part in which the first terminal block is installed (arrangement surface(2f2)).

Description

TECHNICAL FIELD [0001] The present invention relates to a CURRENT-VOLTAGE MEASURING INSTRUMENT

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current-voltage measuring apparatus that is installed side by side in a panel and measures a current and a voltage.

The current-voltage measuring apparatus calculates a measurement value required for evaluation of power and phase (phase) with respect to an input of a current or a voltage flowing in a wiring, converts it into a DC current or voltage proportional to the measured value, Specifically, for example, a device such as a transducer or a watt-hour meter is equivalent. Of these current-voltage measuring apparatuses, those of the type installed side by side in a panel such as a switchboard or a control panel, such as a transducer or a buried-type watt-hour meter, are required to be compact due to space limitation.

Particularly, in the case of using an IEC rail (International Electrotechnical Commission standard: rail of International Electrotechnical Commission standard) also referred to as a DIN rail as a mounting method in a half board, the lateral size (width) It is effective to save space. On the other hand, in the case of arranging the input / output terminal blocks in the lateral direction (see, for example, Patent Document 1), there is a limitation in reducing the width because of the limitation of the terminal size and number.

Patent Document 1: Japanese Patent Application Laid-Open No. 1-259598 (page 3, top left column, first drawing) Patent Document 2: Japanese Utility Model Publication No. 1-166968 (pages 3 to 4, first and second drawings)

For example, even if a technique of changing the height of adjacent terminal blocks (for example, refer to Patent Document 2) is used, the case of adjacent devices and the wiring So that they could not be brought close to each other until they were in close contact with each other. That is, space saving when a plurality of devices are installed side by side in a panel is insufficient.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is an object of the present invention to obtain a current-voltage measuring apparatus excellent in space saving when a plurality of devices are installed side by side in a panel.

The current-voltage measuring apparatus of the present invention is a current-voltage measuring apparatus that is installed on a vertical mounting surface of a half board in parallel with the same type of apparatus. The current- A plurality of electric circuits for calculating measured values and converting the measured values into a measurable signal and outputting the measured values, a case having a box-shaped housing for housing the plurality of electric circuits therein, A plurality of terminals arranged on one surface of a surface parallel to the mounting surface of the case in a state of being installed in the half and electrically connected to external wiring or equipment, Wherein the two terminal blocks in the installed state on the arrangement surface on which the terminal blocks of the case are arranged are arranged in a rectangular shape, The first terminal block of the two terminal blocks protrudes outward from the second terminal block in a direction perpendicular to the mounting surface, and the second terminal block protrudes outward from the second terminal block in a direction perpendicular to the mounting surface, And a portion of the placement surface outside the first terminal block in the horizontal direction is a stepped surface that is recessed inwardly in a direction perpendicular to the mounting surface as compared with a portion where the first terminal block is disposed .

According to the current-voltage measuring apparatus of the present invention, since a step is provided on the outside of the terminal block, it is possible to avoid interference between the wiring connected to the adjacent apparatus and the case, A current-voltage measuring apparatus excellent in space saving can be obtained.

1 is a perspective view showing a state in which a current-voltage measuring apparatus according to Embodiment 1 of the present invention is installed in a half board.
2 is a front view of a current-voltage measuring apparatus according to Embodiment 1 of the present invention.
3 is a bottom view of the current-voltage measuring apparatus according to Embodiment 1 of the present invention.
4 is a plan view developed of a circuit board constituting a current-voltage measuring apparatus according to Embodiment 1 of the present invention.
5 is a perspective view of each assembling step for explaining the internal structure of the current-voltage measuring apparatus according to the first embodiment of the present invention.
6 is a schematic sectional view in the horizontal direction when a virtual state is added to the current-voltage measuring apparatus according to the first embodiment of the present invention.
7 is a bottom view showing a state in which a plurality of current-voltage measuring apparatuses according to Embodiment 1 of the present invention are mounted in close contact with each other in a half board.
Fig. 8 is a perspective view and a side view of the current-voltage measuring apparatus according to the second embodiment of the present invention from a rear surface thereof in a state in which it is installed in a half board.
9 is a front view and a side view of a current-voltage measuring apparatus according to Embodiment 2 of the present invention.
10 is a rear view of a current-voltage measuring apparatus according to Embodiment 2 of the present invention.
11 is a schematic sectional view in the horizontal direction of the current-voltage measuring apparatus according to the second embodiment of the present invention.
12 is a rear view showing a state in which a plurality of current-voltage measuring apparatuses according to Embodiment 2 of the present invention are mounted close to each other in a half board.

Embodiment 1

Figs. 1 to 7 are for explaining the configuration of a current-voltage measuring apparatus according to Embodiment 1 of the present invention. Fig. 1 is a perspective view showing a state in which a current-voltage measuring apparatus for explaining a configuration of a front portion in which a terminal block (terminal block) of a current-voltage measuring apparatus, which is a characteristic portion of the present invention, is arranged is installed in a half board. 2 and 3 are a front view and a bottom view, respectively, of the current-voltage measuring apparatus, and Fig. 4 is a flat developed view showing a state in which two circuit boards constituting the current-voltage measuring apparatus are developed (unfolded) on one plane.

5 is a perspective view of each step of assembling the circuit board with the base body of the case for explaining the internal structure of the current-voltage measuring apparatus and assembling the case cover. 6 is a cross-sectional schematic diagram in the horizontal direction corresponding to the A-A cut plane in Fig. 2 for explaining the state when the circuit constituting the current voltage measuring apparatus according to the first embodiment is assumed to be arranged in the conventional manner . 7 is a bottom view showing a state in which a plurality of current-voltage measuring apparatuses according to the first embodiment are closely mounted in a half board.

A current-voltage measuring apparatus according to Embodiment 1 of the present invention inputs a current and a voltage from a wiring of an external circuit and calculates a measurement value required for evaluation of power, phase (phase), etc. in an internal circuit, And outputs a DC current or voltage. Among the current-voltage measuring devices, the device is called a transducer, and it is a device that enables the upper device to monitor the state of the target circuit by converging the output from the transducer with the upper device. It is presumed that the installation surface of an electric distribution panel, a control panel, and the like is provided on a wall in a vertical panel in the same manner as the buried electric power meter shown in the second embodiment.

Therefore, the second embodiment also includes Embodiment 2, wherein the mounting surface of the half board, that is, the vertical direction is the vertical direction (y direction) and the horizontal direction is the horizontal or vertical direction Width direction (x direction). Then, the depth direction in the half board is the depth direction (z direction), and the front face as the half face is the front face side and the back side is the back face side. In addition, the current-voltage measuring device assumes that terminal blocks are arranged on the front surface or the back surface in an actual mounting state. In addition, since it is assumed that a plurality of devices of the same type are closely arranged in a half board, the surface other than the side on which the terminal board is disposed is formed flat and basically forms a rectangular parallelepiped (box shape). This will be described in detail below.

The current-voltage measuring apparatus according to the first embodiment is referred to as a transducer 1, and an IEC rail 920 extending in the horizontal direction on a mounting surface 910f of a half The mounting groove 2d on the back surface side is mounted so as to abut the mounting groove 2d. The IEC rail 920 is a metal rail of an international standard that is used when a control component is mounted in a control panel (panel), and the mounting position can be freely determined in the longitudinal direction (x direction). Therefore, when two or more pieces of the same product are used in parallel, the number of pieces per unit area can be increased by closely mounting the products, resulting in space saving in a half board. Therefore, both side surfaces (right side surface 2sR, left side surface 2sL (Fig. 2)) and the upper surface 2t and the lower surface 2b of the case 2 can be seen from the front or back surface , They are formed in flat shapes having no protruding portions.

The transducer 1 has a rear surface 2r (Fig. 3) opposite to the front surface 2f on which the terminal blocks 3 and 4 are mounted facing the mounting surface 910f in the panel Respectively. Each of the terminal blocks 3 and 4 has a plurality of terminals 32 and 42 arranged linearly in the longitudinal direction (y direction) on the insulating base portions 31 and 41, As shown in Fig. The wiring work is also performed from the front side and the current is supplied from the terminal 32a of the terminal block 3 to the terminal 32f and from the terminal 32i to the terminal 32i. The terminal 42a and the terminal 42b of the terminal block 4 and the terminal 42f are connected to the terminal 42f.

Next, the peripheral structure of the terminal blocks 3 and 4, which is a characteristic part of the present invention, will be described. The terminal blocks 3 and 4 are mounted on the front surface 2f of the case 2 but the terminal block 3 is positioned forward (in the z direction) the plus side in the z direction). In addition, a step difference is provided on the left lateral side of the placement surface 2f2 of the terminal block 3, and a step difference surface 2f1 is provided so as to be positioned behind the placement surface 2f2 in the depth direction. The protrusion value D21 of the stepped surface 2f1 with respect to the arrangement surface 2f2 is equal to the protrusion value D23 of the arrangement surface 2f3 of the terminal block 4 with respect to the arrangement surface 2f2 have. Namely, the arrangement surface 2f3 and the stepped surface 2f1 of the terminal block 4 are provided at the same position in the depth direction.

The case 2 forming the external shape such as the mounting surface is composed of two members (the base body 22, the cover body 21, and the like) formed by molding a thermoplastic resin such as PBT (Polybutylene Terephthalate: polybutylene terephthalate) ) Are combined to form a box shape. The terminal blocks 3 and 4 are configured so as to penetrate through the openings 2a3 and 2a4 (FIG. 5) from the inside of the case 2 to protrude to the outside as will be described later. Therefore, the terminal blocks 3 and 4 are strictly referred to as " placement faces " in an external form, although they are not disposed on the faces such as the placement faces 2f2 and 2f3.

Next, the internal configuration will be described. 4, the internal circuit constituting the transducer 1 includes a current input circuit 71, a voltage input circuit 74, an output conversion circuit 73, And an operation power source circuit 72 of the transducer 1 main body. These circuits are formed on the two circuit boards (the circuit board 51 and the circuit board 61) which are directly connected to the terminal block 3 and the terminal block 4 and two circuit boards 5, and the circuit board 6) are formed.

The circuit board 5 and the circuit board 6 are connected by a flexible relay cable 81 and a relay cable 82 and required portions as the circuit boards 5 and 6 are electrically connected . The terminal block 3 is fixed to an end portion of the circuit substrate 51 opposite to the portion to which the cable is connected such that the terminal screw 34 faces outward, that is, the backside 3r as a terminal block faces inward. The wiring 35 from each terminal 32 of the terminal block 3 is connected to the current input circuit 71 and the operation power supply circuit 72. Likewise, the terminal block 4 is fixed so that the terminal screw 44 faces outward, that is, the rear face 4r as the terminal block faces inward, at the opposite end of the circuit board 61 connected with the cable have. The wiring 45 from each terminal 42 of the terminal block 4 is connected to the voltage input circuit 74 and the output conversion circuit.

When the circuit boards 5 and 6 thus formed are assembled to the apparatus, as shown in Fig. 5 (a), the respective mounting parts are folded away from the cable portion so as to face outward, (61) are parallel to each other. The groove portion 2c provided in the base body 22 is provided with the circuit portions 51e and 61e along the side end portions 51e and 61e of the circuit substrates 51 and 52 in the negative direction side in the depth direction, The substrates 5 and 6 are inserted. Thereafter, as shown in Fig. 5B, the lid body 21 is put on the base body 22, and the assembly is performed by snap fit or the like. At this time, the terminal block 3 fixed to the circuit board 5 passes through the opening 2a3 provided on the arrangement surface 2f2 of the cover body 21, and a required portion is exposed to the outside. Likewise, the terminal block 4 fixed to the circuit board 6 passes through the opening 2a4 provided on the arrangement surface 2f3 of the cover body 21, and a required portion is exposed to the outside.

When the mounting groove 2d is fitted into the IEC rail 920, a mounting claw 23 made of polyacetal (POM) for gripping the IEC rail 920 is attached to the base body 22, that is, the rear surface 2r (see Fig. 3). This process may be performed before or after the assembly.

Conventionally, a terminal block is divided into terminals on the input side and on the output side in order to facilitate the insulation treatment between circuits and the practice in wiring when constructing the current-voltage measuring device using the terminal block directly connected to the circuit board , And a circuit is allocated to the circuit board accordingly. However, in the transducer 1 as the current-voltage measuring device according to the first embodiment of the present invention, the current input circuit 71 and the dynamic power supply circuit 72 are allocated to the circuit board 5, To the circuit board 6, a voltage input circuit 74 and an output conversion circuit 73 are allocated. In other words, both the input terminal and the output terminal are present in one terminal block. This reason will be explained.

The current input circuit 71 is a circuit for converting the current input to the transducer 1 into a current having a current proportional to the input current by the internal CT 71a. In order to reduce the power loss in the internal circuit, the current input circuit 71 needs to be changed in current by a current transformer (CT) using a coil whose component height increases.

The operation power supply circuit 72 is a circuit for converting the power given as the product driving power supply to a DC voltage used in an internal circuit of the product. For example, in the transducer 1 according to the first embodiment, a component having a large component height such as a transformer 72a or an aluminum electrolytic capacitor 72b is used as a component part in order to adopt a switching type power supply circuit .

On the other hand, the voltage input circuit 74 is a circuit for converting the voltage input to the transducer 1 into a low voltage proportional to the input voltage by the resistance of the internal circuit. Therefore, it is not necessary to consider the power loss substantially, and the voltage input circuit 74 does not require a component having a high component height such as a coil or an electrolytic capacitor, and is composed mainly of a chip resistor having a low component height can do.

The output conversion circuit 73 calculates the measurement item using the current and voltage converted by the current input circuit 71 and the voltage input circuit 74 and converts the calculation result into a DC current or voltage to output . Therefore, the output conversion circuit 73 does not require a component having a high component height, such as a coil or an electrolytic capacitor, but can be formed only of surface-mounted components such as ICs.

That is, among the four circuits required as the current-voltage measuring apparatus, components having a large component height, such as the CT 71a, the transformer 72a, and the aluminum electrolytic capacitor 72b, Only the power supply circuit 71 and two cooperating power supply circuits 72 are provided. Therefore, in the transducer 1 according to the first embodiment, the current input circuit 71 and the power supply circuit 72, which require a component having a large component height, whose thickness as a circuit board increases, ). In contrast, the voltage input circuit 74 and the output conversion circuit 73, which are circuits constituted only by surface-mounted components having a small component height, are allocated to the circuit board 6. [

As a result of this assignment, input / output items as described in Fig. 2 are assigned to the terminal block 3 and the terminal block 4. At this time, when a circuit is allocated to an input and an output as in the conventional case, there is no need to take special consideration into insulation in each circuit board, and two circuit boards are connected by one relay cable It is also possible. On the other hand, in the case of circuit allocation like the transducer 1 according to the first embodiment, it is necessary to take an insulation distance between circuits in the circuit board. The circuit board 6 on which the output conversion circuit 73 is disposed from the circuit board 5 on which the current input circuit 71 is disposed is connected by the relay cable 81 as described above. At this time, a signal line for connecting the signal of the operation power supply circuit 72 to the output conversion circuit 73 is required. However, in order to ensure insulation from the signal of the current input, a relay cable 82 need to be used.

Since the circuits are allotted so that the parts having a high component height are gathered together on one board (the circuit board 5) despite the necessity of additional measures for securing such insulation, (6)) can be made thinner. This makes it possible to reduce the width of the case 2 as compared with the conventional allocation and to suppress the dimensions of the product exterior width and the width of the product important for a device such as a transducer 1, I could.

6, the CT 71aV is connected to the circuit board 6V while the power source transformer 72a remains in the circuit board 5V, as in the conventional case, . Then, the substantial thickness of the circuit board 5V is not changed, and the substantial thickness of the circuit board 6 is increased by the CT 71aV. As a result, the position of the left side 2sL of the case 2 is not changed, and the right side 2sRV is enlarged to the right side corresponding to the arrow in the figure, and the lateral width dimension of the case 2 is increased. However, in the transducer 1 according to the first embodiment, since the circuits are allocated so that a circuit having a high component height is concentrated on one of the circuit boards, restrictions on the component having a large component height can be minimized And it was possible to suppress the width dimension of important product appearance. As a result, the space saving in the half board and the miniaturization of the half board itself can be realized.

In the transducer 1 according to the first embodiment, in addition to reducing the lateral width of the product itself as described above, a plurality of products can be closely mounted in a half. Here, only the reduction in the width of the outer shape of the product causes a problem that the wiring of the neighboring products interferes with each other. Thus, as for the problem of wiring interference, a technique for providing a difference in height between terminal blocks as disclosed in Patent Document 1 is disclosed. Obviously, in this technique, the distances between the products can be reduced compared with the case where the terminal blocks are provided at the same height, but if the adjacent devices are closely contacted, the wiring of one device interferes with the case side of the other device , It can not be mounted closely. However, in the transducer 1 according to the first embodiment, since the step difference surface 2f1 is provided as described above, interference between the wiring of the adjacent devices and the case side of the other device can be avoided, 920).

On the other hand, in order to reduce the power loss, the distance from the back surface 3r on which the wiring 35 as the terminal block 3 protrudes to the CT 71a is generally shortest within a mountable range on the substrate. 3, since the step difference surface 2f1 is provided on the outer side of the arrangement surface 2f2 of the terminal block 3 protruding forward from the terminal block 4, In the ducer 1, the distance from the back surface 3r of the terminal block 3 to the CT 71a is longer than the shortest possible distance in mounting.

Although there is a disadvantage such as an increase in the current path in the CT 71a, it is difficult to connect the secondary side of the instrumental transformer of the transducer 1, the wire diameter to be laid between the terminal blocks of the adjacent devices, The step difference D21 between the stepped surface 2f1 and the placement surface 2f2 is set to 15 mm. This is the same as the inventive method of the step D23 between the arrangement surface 2f2 of the terminal block 3 and the arrangement surface 2f3 of the terminal block 4. As a result, the step difference surface 2f1 and the arrangement surface 2f3, Are present in the same plane. Conversely, by moving the increase range of the width by the component having a high component height (for example, CT 71a or the like) to the position away from the terminal block 3 in the depth direction, , And the stepped portion D23 is formed. In addition, the increase in power loss due to the extension of the current path in the CT 71a caused by the provision of the step D23 was in a practical range.

As a result, as shown in Fig. 7, it is possible to closely mount a plurality of transducers 1- _(n-1) , 1- _(n) , 1- _{(n + 1) in the} horizontal direction. For example, the wiring bundle 84- _(n-1) connected to the terminal block 4- _{(n-1) of the} left transducer 1- _(n-1) Does not interfere with the side surface of the transducer 1- _(n) , remains within the stepped surface, and does not interfere with the wiring bundle 83- _(n) connected to the terminal block 3- _(n) . Similarly, the wiring bundle 84- _(n) connected to the terminal block 4- _(n ) of the central transducer 1- _(n) is connected to the side of the transducer 1- _{(n + 1)} And does not interfere with the wiring bundle 83- _{(n + 1)} connected to the terminal block 3- _{(n + 1)} . That is, there is a space in which a wiring (bundle) of output and a voltage input signal of the neighboring products pass through at the time of close contact mounting, and there is no possibility of interfering with the wiring between the products at the close contact mounting.

It is needless to say that the size of the stepped portion D21 and the stepped portion D23 can be appropriately changed depending on the thickness and the number of the wirings assumed. Similarly, the width (x-direction length) of the stepped surface 2f1 may be suitably set in accordance with the thickness and the number of the wirings assumed, but it is basically the same as the step difference D21.

Embodiment 2 Fig.

In the first embodiment, a device called a transducer that converts the calculated measurement value into a direct current or voltage and outputs the output is described. In the second embodiment, a current-voltage measuring apparatus, which is referred to as a buried-type electronic watt-hour meter, which inputs current and voltage of a target circuit and converts the integrated amount of electric power as a calculation result in the internal circuit into a pulse and outputs the pulse, will be described.

Figs. 8 to 12 are for explaining the configuration of the current-voltage measuring apparatus according to the second embodiment of the present invention. Fig. Fig. 8 is a perspective view and a side view showing a state in which a current-voltage measuring apparatus for explaining a configuration of a rear portion in which terminal blocks of a current-voltage measuring apparatus, which is a feature of the present invention, is arranged in a half board; Fig. 9 is a front view and a right side view of the current-voltage measuring apparatus, and Fig. 10 is a rear view. 11 is a schematic sectional view in the horizontal direction of the current-voltage measuring apparatus corresponding to the section B-B in Fig. 10, and Fig. 12 is a sectional view of the current-voltage measuring apparatus in the case where a plurality of the current- Fig.

As shown in Fig. 8, the watt hour meter 201 according to the second embodiment of the present invention is a watt-hour meter, and the watt- And the front surface 202f of the panel 930 is exposed from the front surface 930f side. The side surfaces 202sR and 202sL and the portions near the front surface 202f of the lower surface 202b and the upper surface 202t protrude outward from the other portions in order to determine the positions in the depth direction, Is formed. Since the panel cut portions 930c pass through the above-described both side surfaces and the "other portions" of the upper surface 202t and the lower surface 202b, they are formed in a flat shape without protruding portions when viewed from the rear surface.

9, a display portion 209 for displaying a measured value is provided on the front surface 202f, so that the terminal blocks 203 and 204 are provided on the back surface 202r side. Therefore, the watt hour meter 201 according to the second embodiment forms a rectangular parallelepiped (box shape) except for the rear surface 202r on which the terminal blocks 203 and 204 are installed and the frame portion 202p.

The watt-hour meter 201 is a device for inputting the current and voltage of the target circuit, converting the integrated value of the amount of power as a calculation result in the internal circuit into a pulse and outputting it, and has a function of displaying a calculated value. Therefore, there is a difference between the output form and the calculation processing content with respect to the transducer 1, but at least the input of current and voltage is common. 10, the current input circuit from the terminal 232a to the terminal 232f to the terminal 232f and the terminal 232j to the terminal 232j are connected to the voltage input circuit and the terminal block 204, The terminal 242a to the terminal 242g become output terminals. In general, the operation power source uses the input to the terminal 232h of the voltage input and the input terminal 232i in the cooperating power supply circuit as the power for driving the product.

Therefore, the basic internal circuit configuration can be divided into a current input circuit using a component having a high component height, a voltage input circuit composed of an operation power supply circuit and a component having a small component height, and an output conversion circuit. That is, it has the same circuit configuration as the transducer 1.

On the other hand, since the panel 930 to be mounted is to open the panel cut 930c for each individual device, unlike the IEC rail 920 described in the first embodiment, . Nevertheless, in order to bring the adjacent devices as close as possible, it is necessary to suppress the interference between the wirings of the devices. Therefore, the configuration for forming the elevation difference and the stepped surface of the terminal block described in the first embodiment is effective also for the buried watt-hour meter 201.

Specifically, as shown in Fig. 11, a current input circuit using a CT 271a having a large component height is formed, and on a circuit board 205 to which a terminal block 203 is fixed, An operation power supply circuit using an aluminum electrolytic capacitor is formed. In contrast, only circuits constituted by only surface-mounted components with low component heights, such as an output conversion circuit and a voltage input circuit, are allocated to the circuit board 206 to which the terminal block 204 is fixed. In other words, like the transducer 1 described in the first embodiment, in the watt-hour meter according to the second embodiment, a circuit using a component having a large component height is concentrated on one circuit board 205. This makes it possible to minimize constraints on parts with a high component height and to reduce the size and width of important product outlines, thereby realizing space saving in the half (board) and miniaturization of the half board itself .

Further, the terminal block 203 is configured so as to protrude from the terminal block 204 in the depth direction (z direction) to the rear side (minus side in the z direction) in order to prevent interference with wiring with the adjacent device. A step difference is provided on the left lateral side of the placement surface 202r2 of the terminal block 203 and a step difference surface 202r1 is provided so as to be positioned forward of the placement surface 202r2 in the depth direction. The depression value of the stepped surface 202r1 with respect to the placement surface 202r2 is equal to the depression value D of the placement surface 202r3 of the terminal block 204 with respect to the placement surface 202r2. That is, the placement surface 202r3 and the step difference surface 202r1 of the terminal block 204 are provided at the same position in the depth direction.

Therefore, the watt-hour meter according to the second embodiment has the same disadvantage as the increase in the current path in the CT 271a, but the distance from the back surface 203r of the terminal board 203 to the CT 271a is It is longer than the shortest distance.

12, a plurality of watt _- hour meters 201- _(n-1) and 201- _{(n) are} arranged horizontally in the watt-hour meter 201 in which thick wirings are connected as compared with the transducer 1, , 201- _{(n + 1)} can be mounted close to the limit of the panel cut arrangement. _(N-1) connected to the terminal block 204- _(n-1) of the watt _- hour meter 201- _{(n-1) on the} left side (right side from the front side ₎ Does not interfere with the side surface of the central watt-hour meter 201- _(n) and stays in the stepped surface and does not interfere with the wiring bundle 283- _(n) connected to the terminal block 203- _(n) . Similarly, the terminal block (204- _(n)) a wiring bundle (284- _(n)) connected to the center of the watt-hour meter (201- _(n)) is, not to interfere with the side surface of the power meter (201- _{(n + 1))} of the right But does not interfere with the wiring bundle 283- _{(n + 1)} connected to the terminal block 203- _{(n + 1)} . That is, there is a space in which the output of the neighboring products and the wiring (bundles) of the voltage input signals pass through when the components are mounted in close proximity, and there is no fear that the interconnection between the products at the time of close mounting interferes.

Needless to say, the step size can be appropriately changed depending on the assumed thickness and the number of wirings. On the other hand, the width (x-direction length) of the stepped surface 202r1 may be set appropriately according to the assumed thickness and number of wirings. However, It is fine to set it narrow.

As described above, according to the current-voltage measuring apparatus (transducer 1 / watt-hour meter 201) according to each embodiment of the present invention, the vertical mounting surface 910f / 930f of the half- A plurality of electric circuits (current input circuits) for calculating measurement values required for evaluation from the current and voltage input from the external circuit, and converting the measured values into a measurable signal and outputting the measured value; (Not shown), a power supply circuit 71, an operation power supply circuit 72, an output conversion circuit 73, and a voltage input circuit 74), a plurality of electric circuits in a box shape, A case 2/202 having a mechanism (mounting groove 2d / frame portion 202p) and a mounting surface 920f parallel to the mounting surface 910f / 930f of the case 2/202 in a half- (The front surface 2f / the back surface 202r) of the one surface and the external wiring or device and the plural (2, 3, 4, 20, 24) having a plurality of terminals (32, 42, 232, 242) for electrically connecting an electric circuit, ) / Rear surface 202r), two terminal blocks are arranged in parallel in the horizontal direction (x direction) with a plurality of terminals arranged in the vertical direction (y direction) The first terminal block 3/203 of the terminal block protrudes outward beyond the second terminal block 4/204 in the direction perpendicular to the installation surface (z direction), and the arrangement surface (front surface 2f / back surface 202r The portion outside the first terminal block 3/203 in the horizontal direction (x direction) is located farther than the portion (the placement surface 2f2 / placement surface 202r2) where the first terminal block is disposed, (2f1 / 202r1) which is recessed inward in the direction (z direction) perpendicular to the plane (2f1 / 202r1). As a result, there is a space in which the output of the adjacent products and the wiring (bundle) of the voltage input signal pass through when the components are mounted in close proximity, and there is no possibility of interfering with the interconnection between the components . That is, it is possible to obtain a current-voltage measuring apparatus excellent in space saving when a plurality of devices are installed side by side in a panel.

Since the stepped surfaces 2f1 and 202r1 are formed at the same positions as the arrangement surfaces 2f3 and 202r3 of the second terminal block 4/204 in the direction perpendicular to the installation surface (z direction) 2 The wiring connected to the terminal block does not interfere with the side of the device.

Each of the two terminal blocks 3, 4/203, and 204 includes two circuit boards 5, 6/205, and 206 extending in a vertical direction (y direction) and a direction (z direction) And the component height is higher than that of the surface mounted component among the plurality of electric circuits (the current input circuit 71, the operation power supply circuit 72, the output conversion circuit 73, and the voltage input circuit 74) A circuit (for example, a current input circuit 71 and an operation power supply circuit 72) using electric components (for example, CT 71a, transformer 72a, aluminum electrolytic capacitor 72b) It is possible to minimize the increase of the lateral width caused by the height of the component.

Alternatively, each of the two terminal blocks 3, 4/203, and 204 may include two circuit boards 5, 6/205, and 206 (not shown) extending in the vertical direction (y direction) , Among the plurality of electric circuits (the current input circuit 71, the operation power supply circuit 72, the output conversion circuit 73, and the voltage input circuit 74), the current input circuit 71 and the cooperatively operating power supply circuit 72 are formed on either one of the two circuit boards and the mounting thickness of the CT 71a, the transformer 72a and the aluminum electrolytic capacitor 72b Since the thick part is concentrated on one side, the increase in width due to the height of the component can be minimized.

A circuit using electric parts having a higher component height than that of the surface mounted component or a circuit board for concentrating the current input circuit 71 and the power supply circuit 72 with the first terminal 3/203 fixed thereto 5/205), it is possible to easily form the above-mentioned stepped surface 2f1 / 202r1 without increasing the lateral width excessively by using the increase in the lateral width caused by the part height in reverse.

In addition, when the technical idea of the present invention is applied to the transducer 1 according to the first embodiment that outputs a DC current or voltage as a measurable signal, a large number of wires are arranged in a half board, The configuration makes it possible to save space.

Particularly, in the transducer 1, since the mounting groove 2d for mounting on the IEC rail 920 is formed as the mounting mechanism on the rear surface 2r opposite to the placement surface (front surface 2f) And the effect of the present invention can be further exerted.

When the technical idea of the present invention is applied to the watt hour meter 201 according to the second embodiment that outputs a pulse signal as a measurable signal, a large number of wirings are arranged in a half board, and the wirings are thick, Thereby making it possible to save space.

Particularly, in the watt hour meter 201, at least two of the four surfaces (left surface 202sL, right surface 202sR, top surface 202t, and bottom surface 202b) adjacent to the placement surface (back surface 202r) (Front face 202f) opposite to the placement face (rear face 202r) is provided as a mounting mechanism in the front face (the front face 202f is described in all of the four faces in Embodiment 2) And the frame portion 202d for fitting to the panel cut portion 930c provided on the panel 930 to be the mounting surface is formed so that it can be mounted in the horizontal direction and the space can be saved It becomes. Further, the display portion 209 can be provided on the front surface (front surface 202f), and monitoring can be easily performed.

1: Transducer (current-voltage measuring device)
2: Case 2d: Mounting groove (mounting mechanism)
2f: front (placement surface) 2f1: step surface
2f2: Disposition surface of terminal block (3) 2f3: Disposition surface of terminal block (4)
3: Terminal block (1st terminal block) 4: Terminal block (2nd terminal block)
5: circuit board 6: circuit board
71: current input circuit 71a: CT
72: AC power supply circuit 72a:
72b: Aluminum electrolytic capacitor 72b
73: output conversion circuit 74: voltage input circuit 74
201: Watt hour meter (current voltage measuring device)
202: case 202p: frame part (installation mechanism)
202r: rear surface (placement surface) 202r1: step surface
202r2: the arrangement surface of the terminal block 203
202r3: the arrangement surface of the terminal block 204
203: Terminal block (first terminal block) 204: Terminal block (second terminal block)
205: circuit board 206: circuit board

Claims (14)

The present invention relates to a current-voltage measuring apparatus, which is installed on a vertical mounting surface of a half board,
A plurality of electric circuits for calculating a measurement value required for evaluation from a current and a voltage input from an external circuit, converting the measured value into a measurable signal,
A casing having a box shape and accommodating the plurality of electric circuits therein and having a mounting mechanism to the half board,
And a plurality of terminals for electrically connecting the plurality of electric circuits with external wirings or devices disposed on one surface of the surface parallel to the mounting surface of the case, And two terminal blocks (terminal blocks) arranged,
In the arrangement surface of the case where the terminal block is disposed,
In the installed state, the two terminal blocks each have a plurality of terminals arranged in the vertical direction and arranged in parallel in the horizontal direction at intervals,
Wherein the first terminal block of the two terminal blocks protrudes outward from the second terminal block in a direction perpendicular to the mounting surface and a portion of the arrangement surface outside the first terminal block in the horizontal direction Wherein the first terminal block is a stepped surface that is recessed inwardly in a direction perpendicular to the mounting surface than a portion where the first terminal block is disposed. The method according to claim 1,
Wherein the stepped surface is formed at the same position as the placement surface of the second terminal block in a direction perpendicular to the installation surface. The method according to claim 1,
Wherein each of the two terminal blocks is fixed to one of two circuit boards extending in a direction perpendicular to the vertical direction and the mounting surface,
Wherein a circuit using an electric part having a higher component height than a surface-mounted component is formed on one of the two circuit boards among the plurality of electric circuits. The method of claim 2,
Wherein each of the two terminal blocks is fixed to one of two circuit boards extending in a direction perpendicular to the vertical direction and the mounting surface,
Wherein a circuit using an electric component having a higher component height than the surface mounted component among the plurality of electric circuits is formed on one of the two circuit boards. The method according to claim 1,
Wherein each of the two terminal blocks is fixed to one of two circuit boards extending in a direction perpendicular to the vertical direction and the mounting surface,
Wherein the current input circuit and the power supply circuit cooperating with each other are formed on one of the two circuit boards among the plurality of electric circuits. The method of claim 2,
Wherein each of the two terminal blocks is fixed to one of two circuit boards extending in a direction perpendicular to the vertical direction and the mounting surface,
Wherein the current input circuit and the power supply circuit cooperating with each other are formed on one of the two circuit boards among the plurality of electric circuits. The method of claim 3,
Wherein one of the two circuit boards is a circuit board on which the first terminal board is fixed. The method of claim 4,
Wherein one of the two circuit boards is a circuit board on which the first terminal board is fixed. The method of claim 5,
Wherein one of the two circuit boards is a circuit board on which the first terminal board is fixed. The method of claim 6,
Wherein one of the two circuit boards is a circuit board on which the first terminal board is fixed. The method according to any one of claims 1 to 10,
And outputs a DC current or voltage as the measurable signal. The method of claim 11,
On the surface opposite to the placement surface,
Wherein the mounting mechanism is provided with a mounting groove for mounting on the IEC rail. The method according to any one of claims 1 to 10,
And outputs a pulse signal as the measurable signal. 14. The method of claim 13,
At least two opposing surfaces of the four surfaces adjacent to the arrangement surface,
The mounting mechanism is provided with a frame portion projecting from a portion adjacent to the surface on the opposite side of the placing surface and fitting to a panel cut provided on the panel serving as the mounting surface Current-voltage measuring device.

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