KR102390696B1 - Current-voltage measuring instrument - Google Patents

Abstract

[Project] An object of the present invention is to obtain a current-voltage measuring device having excellent space-saving properties when a plurality of devices are installed side by side in a panel.
[Solutions] In the front surface 2f on which the terminal blocks 3 and 4 of the case 2 are arranged, in the installed state, the two terminal blocks 3 and 4 have a plurality of terminals 32 and 42, respectively. are arranged in a vertical direction (y-direction) and arranged in parallel with an interval in the horizontal direction (x-direction), and the first terminal block 3 among the two terminal blocks is arranged in a direction perpendicular to the mounting surface of the half ( z-direction), the first terminal block is disposed outside the first terminal block 3 in the horizontal direction (x-direction) of the front surface 2f of the front surface 2f It has a stepped surface 2f1 which is recessed inward in the direction (z direction) perpendicular to the installation surface rather than the portion (placement surface 2f2).

Description

Current Voltage Measurement Device {CURRENT-VOLTAGE MEASURING INSTRUMENT}

The present invention relates to a current-voltage measuring device arranged side by side in a panel and measuring current and voltage.

A current voltage measuring device calculates a measured value required for evaluation of power or phase, etc. with respect to an input of current or voltage flowing through a wiring, and converts it into a direct current or voltage proportional to the measured value and outputs it. , specifically, corresponds to, for example, a transducer or a device such as a watt-hour meter. Among these current and voltage measuring devices, such as a transducer or a buried watt-hour meter, a type installed side by side in a panel such as a switchboard or a control panel is required to be compact due to space restrictions.

In particular, when using IEC rail (International Electrotechnical Commission standard rail), also called DIN rail, as a mounting method in half, the horizontal size (width) is reduced rather than the vertical size (height). This is effective for space saving. On the other hand, in the case of arranging input/output terminal blocks in the horizontal direction (see, for example, Patent Document 1), there is a limit in reducing the width due to restrictions on the size and number of terminals.

Patent Document 1: Japanese Patent Application Laid-Open No. 259598 (top left column on page 3, Fig. 1) Patent Document 2: Japanese Utility Model Publication Hei 1-166968 (Pages 3 to 4, Figures 1 and 2)

Therefore, although arranging the terminal blocks in the vertical direction is considered, for example, even if a technique for changing the height of the adjacent terminal blocks (see, for example, Patent Document 2) is used, cases and wiring of adjacent devices are used. Due to this interference, the devices could not be brought into close contact until they were brought into close contact. That is, the space saving property at the time of installing several apparatus side by side in a board was insufficient.

The present invention has been made in order to solve such a problem, and an object of the present invention is to obtain a current-voltage measuring device having excellent space-saving properties when a plurality of devices are installed side by side in a panel.

The current-voltage measuring device of the present invention is a current-voltage measuring device on the premise that it is installed side by side with a device of the same type with respect to a half-vertical mounting surface. A case having a plurality of electric circuits for calculating the measured values to be measured, converting them into measurable signals and outputting them, and housing the plurality of electric circuits in a box shape, and having a mounting mechanism to the half; , a plurality of terminals for electrically connecting an external wiring or device and the plurality of electric circuits to one of the surfaces parallel to the installation surface of the case in the half-mounted state is provided with two terminal blocks arranged, and on the arrangement surface of the case where the terminal blocks are arranged, in the installed state, the two terminal blocks each have a plurality of terminals arranged in a vertical direction and in a horizontal direction is arranged in parallel with an interval between the two terminal blocks, a first terminal block of the two terminal blocks protrudes outward than a second terminal block in a direction perpendicular to the installation surface, and the second terminal block of the arrangement surface in the horizontal direction It is characterized in that the portion outside the first terminal block has a stepped surface that is recessed inward in a direction perpendicular to the installation surface than the portion where the first terminal block is disposed.

According to the current-voltage measuring device of the present invention, since the step is provided on the outside of the terminal block, interference between the wiring connected to the adjacent device and the case can be avoided, and when a plurality of devices are installed side by side in a panel A current-voltage measuring device having excellent space-saving properties can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the state which installed the current-voltage measuring apparatus which concerns on Embodiment 1 of this invention in the board.
Fig. 2 is a front view of the current-voltage measuring device according to the first embodiment of the present invention.
Fig. 3 is a bottom view of the current-voltage measuring device according to the first embodiment of the present invention.
Fig. 4 is a plan exploded view of a circuit board constituting the current-voltage measuring device according to the first embodiment of the present invention.
Fig. 5 is a perspective view for each assembly step for explaining the internal structure of the current-voltage measuring device according to the first embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view in the horizontal direction when a virtual state is added to the current-voltage measuring device according to the first embodiment of the present invention.
Fig. 7 is a bottom view showing a state when a plurality of current-voltage measuring devices according to the first embodiment of the present invention are mounted in close contact with each other within a board.
Fig. 8 is a perspective view and a side view from the rear in a state in which the current-voltage measuring device according to the second embodiment of the present invention is installed in a board.
9 is a front view and a side view of a current-voltage measuring device according to a second embodiment of the present invention.
Fig. 10 is a rear view of the current-voltage measuring device according to the second embodiment of the present invention.
Fig. 11 is a schematic cross-sectional view in the horizontal direction of the current-voltage measuring device according to the second embodiment of the present invention.
Fig. 12 is a rear view showing a state when a plurality of current-voltage measuring devices according to the second embodiment of the present invention are attached close to each other in a half.

Embodiment 1.

1-7 are for demonstrating the structure of the current-voltage measuring apparatus which concerns on Embodiment 1 of this invention. Fig. 1 is a perspective view showing a state in which a current-voltage measuring device is installed in a panel for explaining the configuration of a front portion in which terminal blocks are arranged, which is a characteristic part of the present invention. 2 and 3 are a front view and a bottom view of the current voltage measuring device, respectively, and FIG. 4 is a plan development view showing a state in which two circuit boards constituting the current voltage measuring device are expanded on one plane.

5 is a perspective view for each process when assembling a circuit board as a base body of a case and assembling a cover part of the case for explaining the internal structure of the current-voltage measuring device. Fig. 6 is a schematic cross-sectional view in the horizontal direction corresponding to the section AA in Fig. 2 for explaining a state when it is assumed that the circuit configuration constituting the current-voltage measuring device according to the first embodiment is arranged as in the prior art. . 7 is a bottom view showing a state when a plurality of current-voltage measuring devices according to the first embodiment are attached in close contact with each other in a half.

The current-voltage measuring device according to the first embodiment of the present invention inputs current and voltage from wiring of an external circuit, calculates a measured value required for evaluation of electric power, phase, etc., in an internal circuit, and is proportional to the measured value It outputs a direct current or voltage. Among current-voltage measuring devices, it is called a transducer, and by converging the output from the transducer in the upper-level device, the state of the target circuit can be monitored by the upper-level device. Moreover, it is premised on the assumption that the mounting surface of a switchboard, a control panel, etc. is installed on a wall surface in a board|panel perpendicular|vertical similarly to the buried-type watt-hour meter shown in Embodiment 2.

Therefore, regarding the direction, the second embodiment is also included, and on the basis of the state installed on the board, the mounting surface of the board, that is, the vertical direction is the vertical direction (y direction), and the horizontal direction is horizontal or Let it be the width direction (x direction). And let the depth direction in a half be a depth direction (z direction), let the front as a half be a front side, and let the back side be a back side. Moreover, it is assumed that the terminal blocks are lined up on the front or back surface of a current-voltage measuring device in an actual mounting state. Further, since it is assumed that a plurality of devices of the same type are closely arranged in a half, they are formed flat except for the surface on which the terminal blocks are arranged, and basically form a rectangular parallelepiped (box shape). Hereinafter, it demonstrates in detail.

The current-voltage measuring device according to the first embodiment is referred to as a transducer 1, and is shown in FIG. 1 with respect to an IEC rail 920 extending in the horizontal direction on a half mounting surface 910f. As shown, the mounting groove 2d on the rear side is engaged so as to be mounted. The IEC rail 920 is a metal rail of an international standard used when mounting a control component in a control panel, and the mounting position can be freely determined with respect to the longitudinal direction (x direction). Accordingly, when two or more identical products are used in parallel, the number of units that can be mounted per unit area increases by closely attaching the products to each other, leading to space saving in the half. Therefore, as shown in FIG. 2, both side surfaces (right surface 2sR, left surface 2sL (FIG. 2)), and upper surface 2t and lower surface 2b of case 2 are viewed from the front or rear side. At this time, each is formed in a flat shape without a protruding portion.

The transducer 1 has a rear surface 2r (FIG. 3) opposite to a front surface 2f to which the terminal blocks 3 and 4 are mounted, facing the mounting surface 910f in the half. is mounted Each of the terminal blocks 3 and 4 has a plurality of terminals 32 and 42 arranged in a straight line in the vertical direction (y direction) on the insulating base portions 31 and 41, and is arranged in the width direction (x direction). ) are spaced apart. The wiring work is also performed from the front, and a current is input from the terminal 32a of the terminal block 3 to the terminal 32f, and a power supply for operation is allocated from the terminal 32g to the terminal 32i. Further, terminals for output and voltage input from the terminal 42c to the terminal 42f are assigned to the terminals 42a and 42b of the terminal block 4 .

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 as shown in FIG. 3 , the terminal block 3 is located in the front (z-direction) from the terminal block 4 in the depth direction (z direction). It is configured so as to be located on the positive side of the z-direction). Further, a step is provided on the left lateral side of the arrangement surface 2f2 of the terminal block 3, and the level difference surface 2f1 is provided so as to be located in the depth direction rearward than the arrangement surface 2f2. Then, the dent value D21 of the step surface 2f1 with respect to the arrangement surface 2f2 is the same as the dent value D23 of the arrangement surface 2f3 of the terminal block 4 with respect to the arrangement surface 2f2. there is. That is, the arrangement surface 2f3 and the step surface 2f1 of the terminal block 4 are provided at the same position in the depth direction.

In addition, the case 2 forming the external shape of the mounting surface and the like is formed by molding a thermoplastic resin such as PBT (Polybutylene Terephthalate: polybutylene terephthalate) and two members (base body 22, cover body 21). ) to form a box shape. The terminal blocks 3 and 4 are configured to protrude from the inside of the case 2 to the outside through the openings 2a3 and 2a4 (FIG. 5), as will be described later. For this reason, the terminal blocks 3 and 4 are not strictly "arranged on the surface" of the placement surface 2f2, the placement surface 2f3, etc., but are referred to as a "placement surface" as an external form.

Next, the internal structure is demonstrated. The internal circuit constituting the transducer 1 includes a current input circuit 71, a voltage input circuit 74, an output conversion circuit 73, and a total of four circuits: a power supply circuit 72 for operation of the transducer 1 main body. And these circuits are constituted on two circuit boards (circuit base 51, circuit base 61) directly connected to each of the terminal block 3 and the terminal block 4, and two circuit boards (circuit board ( 5), the circuit board 6) is formed.

The circuit board 5 and the circuit board 6 are connected by a flexible relay cable 81 and a relay cable 82, and necessary parts as the circuit boards 5 and 6 are electrically connected. . The terminal block 3 is being fixed to the edge part on the opposite side of the part to which the cable of the circuit base material 51 is connected so that the terminal screw 34 may face outward, ie, the back surface 3r as a terminal block may face inward. And the wiring 35 from each terminal 32 of the terminal block 3 is connected to the current input circuit 71 and the power supply circuit 72 for operation. Similarly, at the end of the circuit base 61 opposite to the portion to which the cable is connected, the terminal block 4 is fixed so that the terminal screw 44 faces outward, that is, the back surface 4r as the terminal block faces inward. there is. And 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 assembling the circuit boards 5 and 6 formed in this way to an apparatus, as shown in FIG. (61) Let them be parallel to each other. And, with the bent part as the head, the groove part 2c provided in the base body 22 is made to follow the side end parts 51e, 61e of each circuit base material 51, 52, and a circuit is made in the negative side direction of the depth direction. The substrates 5 and 6 are inserted. Then, as shown in FIG.5(b), the cover body 21 is covered with respect to the base body 22, and it assembles by fitting by a snap fit (snap fit etc.). At this time, the terminal block 3 fixed to the circuit board 5 penetrates the opening 2a3 provided in the arrangement surface 2f2 of the cover body 21 to expose a necessary portion to the outside. Similarly, the terminal block 4 fixed to the circuit board 6 penetrates the opening 2a4 provided in the mounting surface 2f3 of the cover body 21, and a necessary portion is exposed to the outside.

In addition, when inserting the mounting groove 2d into the IEC rail 920, a polyacetal (POM: Poly Oxy Methylene) mounting claw 23 for holding the IEC rail 920 is attached to the base body ( 22), that is, the rear surface 2r (refer to Fig. 3) is sandwiched therein. This process may be either before assembly or after assembly.

When composing a current-voltage measuring device using such a terminal block directly connected to a circuit board, in order to facilitate the insulation between circuits and to conform to the customary practice of wiring, the terminal block is conventionally divided into an input-side terminal and an output-side terminal. , the circuit was assigned to the circuit board accordingly. However, in the transducer 1, which is a current voltage measuring device according to the first embodiment of the present invention, a current input circuit 71 and an operation power supply circuit 72 are allocated to the circuit board 5, and the other A voltage input circuit 74 and an output conversion circuit 73 are allocated to the circuit board 6 . That is, it has a structure in which both an input terminal and an output terminal exist in one terminal block. The reason for this will be explained.

The current input circuit 71 is a circuit that converts the current input to the transducer 1 into a low current proportional to the input current by the internal CT 71a. In order to reduce the power loss in the internal circuit, it is necessary to convert the current in the current input circuit 71 by a CT (Current Transfer: Instrument Current Transformer) using a coil having a large component height.

The power supply circuit 72 for operation is a circuit that converts electric power supplied as a power supply for driving the product into a DC voltage used in the internal circuit of the product. For example, in the transducer 1 according to the first embodiment, in order to employ a switching-type power supply circuit, a component having a large component height such as a transformer 72a and an aluminum electrolytic capacitor 72b is used as a component. will be needed

On the other hand, the voltage input circuit 74 is a circuit that converts the voltage input to the transducer 1 into a low voltage proportional to the input voltage by the resistance of the internal circuit. Therefore, there is no need to consider the power loss substantially, and the voltage input circuit 74 does not require components with high component heights such as coils and electrolytic capacitors, and is mainly composed of chip resistors with low component heights. can do.

In addition, the output conversion circuit 73 calculates a 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 direct current or voltage to external It is a circuit that outputs Therefore, also in the output conversion circuit 73, components with a high component height, such as a coil and an electrolytic capacitor, are not required, and can be comprised only with surface mount components, such as an IC.

That is, among the minimum four circuits required as a current voltage measuring device, as described above, the one that requires a component having a high component height, such as the CT 71a, the transformer 72a, and the aluminum electrolytic capacitor 72b, is a current input circuit. There are only two power supply circuits (71) and (72) for operation. Therefore, in the transducer 1 according to the first embodiment, the current input circuit 71 and the power supply circuit 72 for operation, which require components with increased thickness as a circuit board, and a high component height, are provided on the circuit board 5 ) are grouped together and assigned. In contrast, the voltage input circuit 74 and the output conversion circuit 73, which are circuits composed only of surface-mounted components with small component heights, are assigned to the circuit board 6 .

Since such assignment was made, the input/output items as described in FIG. 2 were assigned to the terminal block 3 and the terminal block 4 . At this time, in the case of allocating circuits by input and output as in the prior art, there is no need to take special considerations such as insulation in each circuit board, and two circuit board tubes are connected by a single relay cable. It is also possible On the other hand, in the case of circuit assignment like the transducer 1 according to the first embodiment, it is necessary to take an insulation distance between circuits in the circuit board. Moreover, the circuit board 6 in which the output conversion circuit 73 is arrange|positioned from the circuit board 5 in which the current input circuit 71 was arrange|positioned is connected by the relay cable 81 as mentioned above. At this time, a signal line connecting the signal of the power supply circuit 72 for operation and the output conversion circuit 73 is also required, but in order to ensure insulation from the signal of the current input, a relay cable ( 82) needs to be used.

In spite of the need for additional measures for ensuring such insulation, since the circuits were assigned so that components with high component heights are put together on one board (circuit board 5), the other circuit board (circuit board 5) The thickness of (6)) could be made thin. This makes it possible to reduce the width of the case 2 as compared to the conventional allocation, and to suppress the product outline and width, which is important in devices arranged in plural in a half, such as the transducer 1 could

Here, when a circuit is assigned regardless of the component height as in the prior art, as shown in FIG. 6 , a power transformer 72a or the like remains on the circuit board 5V, and a CT (71aV) is applied to the circuit board 6V. will be placed Then, the actual thickness of the circuit board 5V does not change, and the actual thickness of the circuit board 6 is increased by the CT 71aV. As a result, the position of the left side surface 2sL of the case 2 does not change, the right side surface 2sRV expands to the right corresponding to the arrow in the figure, and the outer diameter and width dimension of the case 2 increases. However, in the transducer 1 according to the first embodiment, since circuit assignment is performed so that circuits with high component heights are concentrated on one circuit board side, the restriction received from components with large component heights can be minimized. Therefore, it was possible to suppress the important product outline and width dimensions. As a result, space saving in the board and miniaturization of the board itself can be realized.

In the transducer 1 according to the first embodiment, as described above, in addition to reducing the width of the product itself, it is configured so that a plurality of products can be closely attached within a half. Here, only by reducing the width of the outer shape of the product, a problem arises in that wirings of adjacent products interfere with each other. Therefore, regarding the problem of interference of wiring, a technique for providing a height difference between terminal blocks as in Patent Document 1 is disclosed. Obviously, in this technique, the distance between products can be reduced compared to the case where the terminal blocks are provided at the same height. , it cannot be attached closely. However, in the transducer 1 according to the first embodiment, since the stepped surface 2f1 is provided as described above, interference between wirings of adjacent devices and the case side of other devices is avoided, and the IEC rail ( 920), it is possible to install it closely.

On the other hand, in order to reduce power loss, it is common to take the shortest distance from the back surface 3r of the wiring 35 as the terminal block 3 to the CT 71a within the range that can be mounted on the substrate. However, as explained in FIG. 3 , since the step surface 2f1 is provided on the outside of the arrangement surface 2f2 of the terminal block 3 protruding forward from the terminal block 4, the transformer according to the first embodiment In the reducer 1, the distance from the back surface 3r of the terminal block 3 to the CT 71a is longer than the shortest possible distance for mounting.

In addition, although there are disadvantages such as an increase in the current path in the CT 71a, the connection of the secondary side of the instrument transformer of the transducer 1, the diameter of the wire laid between the terminal blocks of adjacent devices, and the maximum wiring In terms of the number, the step D21 between the step surface 2f1 and the arrangement surface 2f2 is 15 mm. This is the same as the design 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, and as a result, the step surface 2f1 and the arrangement surface 2f3 is configured to exist in the same plane. Conversely, by moving the width increase range by the component having a high component height (for example, the CT 71a etc.) to a position away from the terminal block 3 in the depth direction, the width as a whole is not increased. , the step D23 is realized. In addition, the increase in power loss due to the extension of the current path in the CT 71a caused by providing the step D23 was practically within a range without any problem.

As a result, as shown in FIG. 7 , for example, a plurality of transducers 1- _(n-1) , 1- _(n) , 1- _(n+1) can be closely attached in the horizontal direction. For example, the wiring bundle 84- _(n-1) connected to the terminal block 4- _(n-1) of the transducer 1- _(n-1) on the left side is at the center It does not interfere with the side surface of the transducer 1- _(n) , stays within the step 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 right transducer 1- _(n+1) ) It does not interfere, stays within the step surface, and does not interfere with the wiring bundle 83- _(n+1) connected to the terminal block 3- _(n+1) . That is, a space is created through which wirings (bundles) of output and voltage input signals of adjacent products pass during close-fitting, so that there is no fear of interference between wirings between products during close-fitting.

It goes without saying that the sizes of the steps D21 and D23 can be appropriately changed according to the thickness and number of assumed wirings. Similarly, the width (x-direction length) of the step surface 2f1 may be appropriately set according to the thickness and number of assumed wirings, but basically the same degree as the step D21 is preferable.

Embodiment 2.

In the first embodiment, an apparatus called a transducer that converts the calculated measured value into a direct current or a voltage and outputs it has been described. In the second embodiment, a description will be given of a current-voltage measuring device called an embedded electronic watt-hour meter that inputs the current and voltage of a target circuit, and converts an integrated wattage value that is an operation result in the internal circuit into a pulse and outputs it.

8-12 are for demonstrating the structure of the current-voltage measuring apparatus which concerns on Embodiment 2 of this invention. Fig. 8 is a perspective view and a side view showing a state in which a current-voltage measuring device is installed in a panel for explaining the configuration of a rear portion in which terminal blocks of the current-voltage measuring device are arranged, which is a characteristic part of the present invention. Fig. 9 is a front view and a right side view of the current voltage measuring device, and Fig. 10 is a rear view. Fig. 11 is a horizontal cross-sectional schematic view of a current-voltage measuring device corresponding to the section BB in Fig. 10, and Fig. 12 is a case in which a plurality of current-voltage measuring devices are attached close to each other in a half. It is a rear view showing the state.

The watt-hour meter 201 according to the second embodiment is defined as “embedded type”, and as shown in FIG. 8 , a case 202 from the back 202r side on a half panel 930 . ), and mounting so that the front surface 202f part is exposed from the surface 930f side of the panel 930. For positioning in the depth direction, the side surfaces 202sR and 202sL and the portion near the front surface 202f of the upper surface 202t and the lower surface 202b protrude outward than the other portions, and the stepped frame portion 202p ) is formed. Moreover, since the panel cut 930c passes through the "other parts" of the both side surfaces, the upper surface 202t, and the lower surface 202b mentioned above, when viewed from the back surface, it is formed in the flat shape which does not respectively protrude.

Moreover, since the display part 209 for displaying a measurement value is provided in the front surface 202f as shown in FIG. 9, the terminal blocks 203 and 204 are provided in the back 202r side. Therefore, in the watt-hour meter 201 according to the second embodiment, a rectangular parallelepiped (box shape) is formed except for the rear surface 202r on which the terminal blocks 203 and 204 are provided and the frame portion 202p.

The watt-hour meter 201 is a device that inputs the current and voltage of a target circuit, converts an integrated wattage value that is a calculation result in the internal circuit into a pulse, and outputs the pulse, and also has a function of displaying the calculated value. Therefore, although there are differences in the output form and arithmetic processing contents from the transducer 1, it is common to at least input a current and a voltage. For example, as shown in FIG. 10 , a current input circuit from the terminal 232a to the terminal 232f of the terminal block 203, a voltage input circuit from the terminal 232g to the terminal 232j, and the terminal block 204 From the terminal 242a to the terminal 242g of , are the output terminals. In general, the power supply for operation uses the input to the terminal 232h of the voltage input and the terminal 232i as power for driving the product in the power supply circuit for operation.

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

On the other hand, since the panel 930 to be mounted is to open the panel cut 930c for each device, it is necessary to leave a certain distance or more between the devices, unlike the IEC rail 920 described in the first embodiment. . Nevertheless, in order to bring adjacent devices as close to each other as possible, it is necessary to suppress interference between the wirings of the devices. Therefore, the configuration in which the height difference and the step surface of the terminal block described in the first embodiment are formed is also effective for the embedded 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 the circuit board 205 to which the terminal block 203 is fixed includes a transformer with a large component height; A power supply circuit for operation using an aluminum electrolytic capacitor is formed. In contrast, to the circuit board 206 to which the terminal block 204 is fixed, only a circuit composed of only surface-mounted components having a low component height, such as an output conversion circuit and a voltage input circuit, is allocated. That is, like the transducer 1 described in the first embodiment, in the watt-hour meter according to the second embodiment, circuits using components having a large component height are integrated on one circuit board 205 . In this way, it is possible to minimize the restrictions imposed by parts with a large part height, and by suppressing important product outline and width dimensions, space saving in the board and miniaturization of the board itself can be realized. can

Furthermore, in order to prevent interference of wiring with adjacent devices, the terminal block 203 is configured to protrude from the terminal block 204 in the depth direction (z direction) to the rear (minus side in the z direction). Then, a step is provided on the left lateral side of the arrangement surface 202r2 of the terminal block 203 , and the step surface 202r1 is provided so as to be located in front of the arrangement surface 202r2 in the depth direction. Incidentally, the depression value of the step surface 202r1 with respect to the placement surface 202r2 is the same as the depression value D of the placement surface 202r3 of the terminal block 204 with respect to the placement surface 202r2. That is, the arrangement surface 202r3 and the step surface 202r1 of the terminal block 204 are provided at the same position in the depth direction.

Therefore, even in the watt-hour meter according to the second embodiment, although there are disadvantages such as an increase in the current path in the CT 271a, the distance from the back surface 203r of the terminal block 203 to the CT 271a can be set as far as possible. It is taking longer than the shortest distance.

As a result, also in the watt-hour meter 201 to which a wire thicker than that of the transducer 1 is connected, as shown in FIG. 12 , a plurality of watt-hour meters 201- _(n-1) , 201- _(n) in the horizontal direction , 201- _(n+1) ) can be mounted close to the limit of the panel cut arrangement. For example, the wiring bundle 284- _(n-1) connected to the terminal block 204- _(n-1) of the watt-hour meter 201- _(n-1) on the left side (right side if viewed from the back side) ) does not interfere with the side surface of the central watt-hour meter 201 - _(n) , stays within the step plane, and does not interfere with the wiring bundle 283- _(n) connected to the terminal block 203- _(n) . Similarly, the wiring bundle 284- _(n) connected to the terminal block 204- _(n) of the central watt-hour meter 201- _(n) ) does not interfere with the side surface of the right-side watt-hour meter 201- _(n+1) ) It stays within the step surface and does not interfere with the wiring bundle 283- _(n+1) connected to the terminal block 203- _(n+1) . That is, a space is created through which wirings (bundles) of output and voltage input signals of adjacent products pass during close mounting, so that there is no fear of interference between wirings between products at close mounting.

It goes without saying that the size of the step can be appropriately changed according to the thickness and number of assumed wirings. On the other hand, the width (x-direction length) of the step surface 202r1 may also be appropriately set according to the thickness and number of wires assumed, but considering the value at which the side surfaces between devices are far apart due to the restrictions of the panel cut, A narrow setting is fine.

As described above, according to the current-voltage measuring device (transducer 1/watt-hour meter 201) according to each embodiment of the present invention, with respect to the half-vertical mounting surface 910f/930f, the device of the same type A current voltage measuring device premised to be installed side by side with a plurality of electric circuits (current input circuits) for calculating measured values required for evaluation from current and voltage input from an external circuit, converting them into measurable signals, and outputting them (71), the operation power supply circuit 72, the output conversion circuit 73, and the voltage input circuit 74) and a box shape and housing a plurality of electric circuits therein, and the installation in half Case 2/202 having a mechanism (mounting groove 2d/frame portion 202p) and parallel to mounting surface 910f/930f of case 2/202 in a half-mounted state A plurality of terminals 32, 42/232, 242 for electrically connecting an external wiring or device and a plurality of electric circuits are disposed on one of the surfaces (front 2f/rear surface 202r). It has two terminal blocks 3, 4/203, 204 arranged in an array, and on the arrangement surface (front 2f/rear surface 202r) on which the terminal blocks of the case are arranged, in the installed state, the two terminal blocks are each plural. of terminals are arranged in a vertical direction (y-direction) and parallel to each other at intervals in the horizontal direction (x-direction), and the first terminal block (3/203) of the two terminal blocks is arranged in a direction perpendicular to the installation surface (z direction), the first terminal block 3/203 in the horizontal direction (x direction) protrudes outside the second terminal block 4/204, and among the mounting surfaces (front 2f/rear surface 202r) The portion outside from the first terminal block (placement surface 2f2/placement surface 202r2) has a stepped surface (2f1/202r1) recessed inward in the direction perpendicular to the installation surface (z direction) than the portion (placement surface 2f2/placement surface 202r2). configured to be This creates a space through which wirings (bundles) of output and voltage input signals of adjacent products pass during close mounting, and there is no risk of interference between wirings between products during close mounting or close mounting. . That is, it is possible to obtain a current-voltage measuring device excellent in space-saving properties when a plurality of devices are arranged side by side in a panel.

Since the step surface 2f1/202r1 is formed at the same position as the arrangement surface 2f3/202r3 of the second terminal block 4/204 in the direction perpendicular to the installation surface (z direction), the 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, 204 is one of the two circuit boards 5, 6/205, 206 extending in a vertical direction (y-direction) and a direction perpendicular to the installation surface (z-direction) It is fixed to any one, and among the plurality of electric circuits (current input circuit 71, operation power supply circuit 72, output conversion circuit 73, voltage input circuit 74), the component height is higher than that of the surface mounted component. Circuits (eg, current input circuit 71, power supply circuit 72 for operation) using electrical components (eg, CT 71a, transformer 72a, aluminum electrolytic capacitor 72b) are 2 When it comprises so that it may be formed in any one of four circuit boards, the increase in the width resulting from the height of a component can be suppressed to the minimum.

Alternatively, each of the two terminal blocks 3, 4/203, 204 is two circuit boards 5, 6/205, 206 extending in a vertical direction (y-direction) and a direction perpendicular to the installation surface (z-direction). ), the current input circuit ( If 71) and the power supply circuit 72 for operation are formed on either one of the two circuit boards, for example, the mounting thickness of the CT 71a, the transformer 72a, and the aluminum electrolytic capacitor 72b is the same. Since thick things are concentrated in one side, the increase of the width resulting from the height of a component can be suppressed to the minimum.

A circuit using an electric component having a component height higher than that of a surface mount component, or a circuit board integrating the current input circuit 71 and the power supply circuit 72 for operation, the circuit board having the first terminal block 3/203 fixed ( If 5/205) is selected, the above-described step surface 2f1/202r1 can be easily formed without excessively increasing the width by reversely using the increase in the width due to the height of the component.

In addition, if the technical idea of the present invention is applied to the transducer 1 according to the first embodiment that outputs a direct current or voltage as a measurable signal, that is, many are arranged in a half, and there are many wirings. The configuration enables space-saving.

In particular, in the transducer 1, on the rear surface 2r opposite to the placement surface (front surface 2f), as an installation mechanism, an installation groove 2d for installation on the IEC rail 920 is formed. direction, the effect of the present invention can be further exhibited.

In addition, if the technical idea of the present invention is applied to the watt-hour meter 201 according to the second embodiment, which outputs a pulse signal as a measurable signal, many are arranged in a half, and the wiring is thick. This enables space-saving.

In particular, in the watt-hour meter 201, at least two opposing surfaces (left side surface 202sL, right side surface 202sR, upper surface 202t, and lower surface 202b) adjacent to the arrangement surface (back surface 202r) Adjacent to the surface (front 202f) opposite to the mounting surface (rear surface 202r) on the face of the dog (all four surfaces were described in the second embodiment, but at least two opposing surfaces are sufficient) as an installation mechanism. Since the frame portion 202d for fitting to the panel cut 930c provided on the panel 930 serving as the installation surface is formed so that the part to be used protrudes more than the other portions, it is possible to install adjacently in the horizontal direction to save space. becomes Moreover, the display part 209 can be provided in the front (front 202f), and monitoring can be performed easily.

1: Transducer (current voltage measuring device)
2: Case 2d: Mounting groove (Mounting mechanism)
2f: Front (placement surface) 2f1: Step surface
2f2: Arrangement surface of terminal block (3) 2f3: Arrangement 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: Power supply circuit for operation 72a: Transformer
72b: aluminum electrolytic capacitor (72b)
73: Output conversion circuit 74: Voltage input circuit (74)
201: Energy meter (current voltage measuring device)
202: Case 202p: Frame part (mounting mechanism)
202r: Back side (placement side) 202r1: Step side
202r2: Arrangement surface of terminal block 203
202r3: Arrangement surface of terminal block 204
203: Terminal block (1st terminal block) 204: Terminal block (2nd terminal block)
205: circuit board 206: circuit board

Claims (14)

As a current voltage measuring device on the premise that it is installed side by side with a device of the same type with respect to a vertical installation surface of a half,
a plurality of electric circuits for calculating measured values necessary for evaluation from current and voltage input from an external circuit, converting them into measurable signals, and outputting them;
a case having a box shape and accommodating the plurality of electric circuits therein, and having a mounting mechanism to the half;
In the half-mounted state, a plurality of terminals are disposed on one of the surfaces parallel to the installation surface of the case, and electrically connect external wiring or equipment and the plurality of electric circuits. Equipped with two terminal blocks arranged,
In the arrangement surface where the terminal block of the case is arranged,
In the installed state, the two terminal blocks, respectively, a plurality of terminals are arranged in a vertical direction and are arranged in parallel with an interval in the horizontal direction,
A first terminal block of the two terminal blocks protrudes outward from a second terminal block in a direction perpendicular to the installation surface, and a portion of the arrangement surface outside from the first terminal block in the horizontal direction includes: It has a stepped surface that is recessed inward in a direction perpendicular to the installation surface than the portion where the first terminal block is disposed,
Each of the two terminal blocks is fixed to any one of the two circuit boards extending in the vertical direction and in a direction perpendicular to the installation surface,
A current-voltage measuring device, wherein, among the plurality of electric circuits, a current input circuit and a power supply circuit for operation are provided collectively on either one of the two circuit boards. The method according to claim 1,
The step difference surface is formed at the same position as the arrangement surface of the second terminal block in a direction perpendicular to the installation surface. The method according to claim 1,
The current-voltage measuring device according to claim 1, wherein said one of said two circuit boards is a circuit board to which said first terminal block is fixed. 4. The method according to any one of claims 1 to 3,
A current-voltage measuring device, wherein a direct current or a voltage is output as the measurable signal. 5. The method according to claim 4,
On the surface opposite to the arrangement surface,
A current-voltage measuring device, characterized in that, as the mounting mechanism, a mounting groove for mounting on an IEC rail is formed. 4. The method according to any one of claims 1 to 3,
A current-voltage measuring device, wherein a pulse signal is output as the measurable signal. 7. The method of claim 6,
Among the four surfaces adjacent to the arrangement surface, at least two opposite surfaces,
In the installation mechanism, a portion adjacent to the surface opposite to the placement surface protrudes more than other portions, and a frame portion for fitting to a panel cut provided in a panel serving as the installation surface is formed. Characterized by the current voltage measuring device. delete delete delete delete delete delete delete

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