JP6559981B2 - Recorder, recorder installation structure and fastening structure - Google Patents

Description

  The present invention relates to a recorder for measuring at least one of a voltage and a current of a power distribution path connected to a watt hour meter, and a fastening structure for fastening the recorder to the watt hour meter.

  Patent Document 1 discloses a voltage / current recorder that is temporarily installed in a consumer's watt-hour meter, etc., and that can measure, display, and record the voltage fluctuation state and the load current state and check the distribution line state. ing.

  In recent years, with the spread of renewable energy, such as solar power generation, to homes, inquiries regarding output suppression, voltage, etc. from power consumers are increasing. In some cases, the measurement of the voltage fluctuation state and the load current state is performed over a long period of time (for example, several days) using such a recorder.

  In the above measurement, for example, in the case of household use, a plurality of measurement points such as a watt hour meter provided in each household of a power consumer, a service branch point provided in a utility pole, and a pole transformer are set. In some cases, a recorder is installed at each measurement point for measurement. In that case, for example, an operator such as a worker receives measurement data at each measurement point wirelessly using a terminal device such as a tablet after measurement, and displays display data created based on the measurement data as a power consumer. In some cases, explanations are given.

JP-A-7-92200

  Generally, electricity meters for consumers such as houses and stores are housed in meter boxes installed on indoor and outdoor wall surfaces, and the voltage fluctuation state and load current state of such electricity meters Is measured by attaching a clip type detection unit connected to the recorder or a clamp type detection unit to the terminal unit of the watt hour meter.

  Here, when the measurement by the recorder is performed for a long period of time, after the recorder is installed, the operator leaves the site and the recorder is left unattended to continue the measurement. However, as described above, the watt hour meter is often installed on an outdoor wall surface or the like, and the installation location may be exposed to rain and wind. In such a case, if the installed recorder moves or falls, the detection unit may come off or its mounting position may shift, resulting in stable data during the measurement period. You may not be able to get into.

  Therefore, in order to perform stable measurements over a long period of time as described above, the recorder should be fixed and held in a stable posture, and a physical load such as external force should not be applied to the detector attached to the power distribution path Is preferred.

  Conventional recorders are not equipped with a mechanism to hold or hold the recorder in a stable posture. In long-term measurements, the operator must search for a place where it is difficult for the operator to move. The recording was performed by installing a recorder or fixing the recorder to the watt hour meter using vinyl tape or the like.

  However, it is not preferable to install the recorder for a long time without any fixing means from the viewpoint of measurement stability and safety. Also, it is troublesome for the operator to fix it with vinyl tape every time the recorder is installed, and if the adhesive part of the tape remains after the recording is finished, the meter (electric energy) is visible. Or the workability of an operator who performs another work may be affected.

  The present invention relates to a recorder that has been made to solve the above problems, and its main purpose is to enable stable measurement even when long-term measurement is performed using the recorder. It is to provide a structured recorder.

  The recorder according to the present invention is configured to provide an attaching means that is attached and fixed to the watt hour meter when the lower surface of the casing is placed on the upper surface of the watt hour meter.

  That is, in the first aspect of the present invention, a recorder that measures at least one of the voltage and current of the power distribution path connected to the watt-hour meter, comprising a recorder main body including a rectangular box-shaped housing. The recorder main body is provided with mounting means for mounting and fixing to the watt hour meter when the lower surface of the casing is placed on the upper surface of the watt hour meter.

  According to this aspect, since the recorder main body is configured to be fixed to the watt hour meter by the mounting means in a state where the recorder is installed on the watt hour meter, the upper surface of the watt hour meter is temporarily Even if the shape is unsuitable for installation (for example, a structure having a protruding portion protruding upward), the recorder can be held in a stable posture. As a result, even when a long-term measurement is performed, the detector connected to the recorder may be disconnected or an extra force may be applied to the detector due to dropping or movement of the recorder during measurement. Can be prevented. That is, it is possible to more reliably prevent the measurement from being disabled and the measurement value from becoming unstable. Thereby, for example, even when long-term measurement is performed in an unattended state, more stable measurement of a voltage fluctuation state, a current fluctuation state, and the like can be realized.

  In the recorder of the above aspect, a groove portion extending in a longitudinal direction of the recorder main body and a plate-like closing portion that closes a part of the opening of the groove portion are provided on the lower surface of the housing, and the attachment means includes: A belt is inserted between the groove portion and the plate-like closed portion, and is wound around a side surface and a lower surface of the watt hour meter so as to attach and fix the recorder main body to the watt hour meter. May be.

  According to this aspect, the recorder main body is configured so that the recorder is attached to and fixed to the watt hour meter by wrapping the belt on the side surface and the lower surface of the watt hour meter. Workability at the time of attaching to a meter can be improved. Furthermore, a special structure for attaching the attachment means to the watt hour meter or the meter box that houses the watt hour meter (for example, an engaged member when the attachment means is an engagement member such as a hook) There is no need to provide. Many common existing watt-hour meters do not have the above-described engaged members, and the recording meter of this aspect is fixedly attached to such an existing watt-hour meter. There are advantages that can be made.

  In the recorder of the above aspect, the watt-hour meter has a protruding portion provided so as to protrude upward from the upper surface of the watt-hour meter, and the groove portion of the recorder has the lower surface of the casing When installed on the upper surface of the watt hour meter, the inner wall of the groove is applied to the protruding portion of the watt hour meter so that the movement of the recorder main body can be regulated.

  According to this aspect, the recorder can be attached and fixed to the watt hour meter while the inner wall of the housing groove portion is applied to the engaging portion of the watt hour meter so that the recorder does not move. As a result, the recorder can be held in a more stable posture, and the recorder can be more reliably prevented from moving during measurement. Furthermore, since the position of the recorder with respect to the watt hour meter can be defined by attaching and fixing the groove of the recorder to the engaging portion, for example, the recorder has a wireless communication function (wireless communication unit). In this case, the wireless communication unit can be attached so as to be in a predetermined position, and the communication performance of the wireless communication unit can be improved.

  In the recorder of the above aspect, the recorder main body includes a wireless communication unit that transmits / receives data to / from an external device, and the wireless communication unit has a lower surface of the housing mounted on an upper surface of the watt-hour meter. When installed in the installed state, it may be arranged so as to come to the front side of the recorder main body.

  According to this aspect, when an operator or the like installs a recorder, when the lower surface of the housing is installed on the upper surface of the watt hour meter, the wireless communication unit is in a specified position of the recorder main body. It is configured to come in. As this specified position, for example, it is easy to communicate with external devices by placing a wireless communication unit on the front upper side of the recorder main body, for example, where it is easy to transmit and receive electromagnetic waves related to wireless communication, Improvement of connectivity and extension of communication distance can be realized. In addition to the location where the watt hour meter is installed, measurement at multiple locations (for example, pull-in branch points, pole transformers, etc.) in addition to the location where the watt hour meter is installed is used to measure the voltage fluctuation state and current fluctuation state related to the inquiry from the power consumer It is preferable that data of a plurality of measurement points can be acquired at once. While wireless communication of such recorders may employ short-range wireless communication for home use, etc. due to problems such as cost, a plurality of measurement points may be separated by several tens of meters, By improving the connectivity of wireless communication, extending the communication distance, and the like, there is a merit that communication can be performed stably even when a plurality of distances are separated.

  In the recorder of the above aspect, the watt-hour meter is installed in a meter box, and the height of the recorder meter is between the upper surface of the watt-hour meter and the inner upper surface of the meter box. And the width in the left-right direction is smaller than the distance between the inner surfaces of the meter box, and the meter main body is mounted and fixed to the watt hour meter by the mounting means. The box may be configured to be closed.

  According to this aspect, since the meter box can be closed with the recorder installed in the watt hour meter, when a long-term measurement is performed in an unattended state, a person other than the operator It is possible to prevent the recorder from being touched or tampered with.

  According to a second aspect of the present invention, there is provided a fastening structure for fastening a recording meter for measuring at least one of a voltage and a current of a power distribution path connected to the watt hour meter to the watt hour meter. In the middle part of the direction, a protrusion that protrudes in the circumferential direction is provided, the recorder comprises a rectangular box-shaped housing, and a groove portion extending in the longitudinal direction on the lower surface of the housing, A plate-like closed portion for closing a part of the opening of the groove portion, and the recorder is installed with the lower surface of the housing placed on the upper surface of the watt-hour meter. A mounting means having a belt inserted between the watt hour meter is wound around the side surface and the lower surface of the projecting portion of the watt hour meter, and the recorder is fixedly attached to the watt hour meter.

  According to this aspect, since the belt is wound around the side surface and the lower surface of the watt hour meter and the recorder is attached and fixed to the watt hour meter, the workability when the worker attaches the recorder to the watt hour meter is improved. Can be improved. Furthermore, since the belt is hung on the back side of the protruding portion of the watt hour meter, the movement of the belt toward the front side can be restricted by the protruding portion of the watt hour meter. As a result, the recorder can be held in a more stable posture, and the recorder can be more reliably prevented from moving during measurement.

  According to the present invention, since the recorder is configured to be mounted and fixed in a state where it is installed on the watt hour meter, the recorder can be held in a stable posture, and more stable measurement can be realized. be able to.

It is (a) front view, (b) top view, and (c) side view of the recorder according to the embodiment. It is the perspective view which looked at the recorder from the lower surface side. It is a conceptual diagram which shows the mounting state of a board | substrate, (a) is the mounting state of the board | substrate surface, (b) is the figure which showed the mounting state of the board | substrate back surface. It is a block diagram which shows the connection state of a recorder. It is a front view which shows typically the state by which the recorder was attached and fixed to the watt-hour meter. It is a side view which shows typically the state by which the recorder was attached and fixed to the watt-hour meter. It is a perspective view which shows typically the state by which the recorder was attached and fixed to the watt-hour meter.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its scope of application, or its application.

(Configuration of recorder)
As shown in FIGS. 1 to 3, the recorder 1 includes a recorder main body 2 including a rectangular box-shaped casing 20 and a substrate 10 built in the casing 20. As shown in FIG. 1, the housing 20 includes an upper plate 21 and a lower plate 22 that are arranged to face each other in the vertical direction (thickness direction), and the widthwise ends of the upper plate 21 and the lower plate 22. , And side plates 24 (24a, 24b) for connecting the left and right (longitudinal) ends of the upper plate 21 and the lower plate 22, respectively. As shown in FIG. 1C, the corners in the width direction and the thickness direction of the casing 20 are notched at an angle of 45 degrees when viewed from the side surface, so that an operator can easily hold the casing 20. It is like that. Further, since the notch is cut as described above, when the recorder main body 2 is placed on the upper surface of the watt hour meter 40, the corner of the housing 20 is placed on the watt hour meter 40 or the meter box 50. Since it does not hit, it is easy to assemble. Moreover, the housing | casing 20 is screwed and fixed from the lower side in each corner | angular part 22d of the lower board 22 so that it cannot remove in the up-down direction.

  In the description of this embodiment, “upper and lower” refers to the upper and lower when the recorder 1 is placed on the upper surface of the watt-hour meter 40 to be described later, and “back”, “front”, The same applies to “left and right”.

  The upper plate 21 has a concave portion 21a whose central portion along the surface is recessed in a rectangular shape, and on the back side of the concave portion 21a is a rectangular display portion 31 extending in the left-right direction from the left corner. Is provided. In addition, on the front side of the recess 21a, a plurality of operation units 32 that receive the operation of the operator are provided side by side in the left-right direction from the left front corner.

  As shown in FIGS. 1 and 5, the left and right side plates 24 (for example, the right side plate 24a in FIG. 1) are provided with four terminals from the back side toward the front side. Specifically, three current terminals 25 (25a, 25b, 25c) for connecting connectors 61a, 62a, 63a provided at the base ends of the current measuring cables 61, 62, 63 are arranged side by side from the back side. A voltage terminal 26 for connecting a connector 71 provided at the proximal end of the voltage measurement cable 72 is disposed on the foremost side. For example, clamp-type detection units 61b, 62b, and 63b are provided at the distal ends of the current measurement cables 61, 62, and 63, and clip-type detection units 73a, 74a, and 75a are provided at the distal ends of the voltage measurement cables. Is provided.

  As shown in FIG. 2, the lower plate 22 of the housing 20 has a groove 22 a extending in the left-right direction, and partially covers the opening of the groove 22 a at both ends in the longitudinal direction of the groove 22 a and is integrated with the lower plate 22. Plate-shaped closed portions 22b and 22b that are formed in a specific manner are provided.

  Ended belt 33 for attaching and fixing the recorder main body 2 (housing 20) to the watt hour meter 40 (see FIG. 5) is provided in the groove portion 22a. The belt 33 is closed on both plates. It is retained by the portions 22b and 22b. A fixing tool 34 is inserted into both ends of the belt 33. After the belt 33 is adjusted to a predetermined length, the belt 33 is fixed at that position, or the belt 33 is released from the fixed position. It can be readjusted. Here, the width of the groove 22a is formed to be wider than the length in the depth direction of a locking portion 44 of the watt-hour meter 40 described later. In this embodiment, when the lower surface of the housing 20 is placed on the upper surface of the watt hour meter 40 by the belt 33 and the fixing tool 34, an attachment means is attached and fixed to the watt hour meter. The belt 33 is inserted between the groove portion 22a and the plate-like closed portions 22b and 22b, and is wound around the side surface and the lower surface of the watt hour meter 40 to attach and fix the recorder main body 2 to the watt hour meter 40.

  Further, a concave portion 22c extending in the width direction is provided in an intermediate portion in the left-right direction on the front side of the lower plate 22. This recess 22c is provided with a switch portion 35 comprising a plurality of changeover switches 35a, 35a,... For switching the burden resistance of the secondary side current input circuit 11 (described as CT switching in FIG. 4). The change-over switches 35a, 35a,... Are switched according to the current measurement range of the current terminal to be connected. By enabling such measurement range switching, stable and high measurement accuracy can be achieved in different measurement ranges. Can be secured.

  As shown in FIG. 3A, current terminals 25 (25 a, 25 b, 25 c) and voltage terminals 26 are arranged in order from the back to the front at the right end of the substrate 10.

  On the back side of the surface of the substrate 10, the current input circuit 11, the memory 14, and the CPU 13 are arranged in order from the right side on the left side of the current terminal 25, and the RTC 18 driven by the battery 19 is disposed on the right front side of the CPU 13. Adjacent to each other. Similarly, on the front side of the surface of the substrate 10, on the left side of the voltage terminal 26, the wireless communication unit 16 having the power supply unit 15 and the antenna 16 a is arranged in order from the right side. Further, a switch unit 35 (35a, 35a,...) And a battery 19 are disposed on the back side of the substrate 10.

  The wireless communication unit 16 includes an antenna 16a disposed at the far left end of the wireless communication unit 16, and is an external device (hereinafter also simply referred to as an external device) such as an external terminal (for example, a tablet terminal) (not shown). Bidirectional data communication is possible. For example, the wireless communication unit 16 receives various setting information and transmits measurement data and the like. Specifically, it receives various setting information such as time information, measurement cycle information, current measurement range setting information, data request signal, etc. from an external device, and transmits a beacon signal indicating the existence of the own device, Measurement data received from the CPU 13 is transmitted to an external device. The antenna 16 a may be disposed on the front side of the wireless communication unit 16 or the front side of the substrate 10.

  The CPU 13 performs various controls such as changing various settings related to the measurement operation and acquiring, recording, and transmitting measurement data. Further, based on settings from the operation unit 32 or an external device or predetermined settings, the current measurement values based on the voltages P1 to P3 and the current signals I1 to I3 and various setting information are displayed on the display unit 31. Control the display.

  The power supply unit 15 receives the voltages P1 and P2, generates a DC power supply for the substrate 10, and supplies it to each circuit.

(Recorder measurement operation)
In the following, the measurement of voltage fluctuation state, current fluctuation state, power flow, power factor and the like (hereinafter also simply referred to as voltage / current measurement) by the recorder 1 will be described in detail with reference to FIG. In the following examples, the low piezoelectric path 57 (distribution path 58 or indoor wiring 59) to be measured will be described as being a single-phase / three-phase three-wire system.

  The current signals I1 to I3 of the low piezoelectric path 57 are input to the measurement unit 12 via the current input circuit 11 having the load resistance reflecting the switching information in the current terminal 25 (25a, 25b, 25c) and the switch unit 35. The Similarly, the voltages P <b> 1 to P <b> 3 of the power distribution path (measurement target) are input to the measurement unit 12 via the voltage terminal 26.

  The measurement unit 12 receives the current signals I1 to I3 and the voltages P1 to P3, performs A / D (Analog / Digital) conversion, and outputs the measurement result to the CPU 13 as a digital signal. The sampling period by the measurement unit 12 can be arbitrarily set.

  The CPU 13 records the voltage and current measurement results from the measurement unit 12 in the memory 14 in a predetermined cycle and continuously for a predetermined number of times (periods). Data recording from the CPU 13 to the memory 14 starts, for example, at a time designated from an external device via the wireless communication unit 16 and is continuously performed until a predetermined period or a predetermined number of times is reached. .

  The predetermined period and the predetermined number of times / periods can be arbitrarily set. For example, the start of measurement may be determined based on input information from the operation unit 32 or based on power-on time instead of the designated time from the external device. The same applies to the predetermined number of times / periods, and may be determined in response to designation from an external device or the operation unit 32, or may be determined based on a predetermined value.

  Further, the measurement start time and the time related to the predetermined period may be determined based on, for example, the RTC 18 that is operated by the power source from the battery 19. For example, the voltage input from any one of the voltage terminals 26 (for example, P1) may be digitally converted by the frequency counting A / D conversion circuit 17 and determined based on the time of the frequency clock based on the power supply frequency of the power distribution path. The predetermined period may use a predetermined value, and is determined based on input operation information from the operation unit 32 or period setting information input from an external device via the wireless communication unit 16. May be.

  Then, after measuring the predetermined number of times / periods, the CPU 13 stores the data in the memory 14 via the wireless communication unit 16 in response to a request from an external device or based on an internal trigger such as measurement end determination. Send measurement data to an external device.

(Configuration of electricity meter and meter box)
Here, as shown in FIGS. 5 and 6, the watt hour meter 40 includes a meter main body 41 that measures and displays the power amount, and a main body cover 42 that is formed of resin, metal, etc., and stores the meter main body 41. The front cover 43 is formed so as to be engaged with the main body cover 42 so as to cover the front surface of the main body cover 42 and is made of transparent glass or resin so that the power display of the instrument main body 41 can be seen. In addition, a rectangular plate-like terminal block 47 extending downward from the lower end on the back side of the meter body 41 (main body cover 42) is provided integrally with the meter body 41 at the back side of the watt-hour meter 40. It has been. The terminal block 47 is provided with terminals 48a to 48c to which the distribution lines 58a to 58c of the power distribution path 58 are connected and terminals 49a to 49c to which the wirings 59a to 59c of the indoor wiring 59 are connected. FIG. 6 is a side view in which the meter box is broken at an intermediate portion in the left-right direction in a state in which the recorder 1 is attached and fixed to the watt-hour meter 40.

  A ring that protrudes outward at a predetermined width in the circumferential direction of the upper, lower, left, and right sides at the boundary between the main body cover 42 and the front cover 43 in order to prevent rain and the like from entering the watt hour meter 40 A projection 46 is attached. Further, the protruding portion 46 is provided with a locking portion 44 that protrudes upward from the central portion in the left and right direction at the upper end thereof, and locking portions 45 and 45 that protrude outward from the central portion in the vertical direction at both left and right ends. The main body cover 42 and the front cover 43 are fixed by screws at three points of the locking portions 44, 45, 45.

  The meter box 50 to which the watt hour meter 40 is attached and fixed has a main body portion 51 that is attached and fixed to a wall surface or the like in a state in which the watt hour meter 40 is housed, and a front cover 52 that covers the front surface of the main body portion 51. ing. The middle part of the front surface of the front cover 52 in the up / down / left / right direction is open in the depth direction, and the opening is closed by a plate-like member 53 formed of transparent glass or resin from the front side. The power display of the watt-hour meter 40 can be confirmed.

(Attaching the recorder to the electricity meter)
Next, the attachment structure of the recorder 1 to the watt hour meter 40 will be described in detail based on the attachment procedure.

  First, the operator removes the front cover 52 of the meter box 50. Thereafter, the recorder 1 is placed so that the lower surface of the housing 20 faces the upper surface of the watt hour meter 40, and the belt 33 attached to the groove portion 22 a is attached to the watt hour meter 40 in the vertical and horizontal directions. Hang around. At this time, the recorder 1 is placed so that the groove portion 22 a of the housing 20 is applied to the locking portion 44 of the watt hour meter 40, and passes through the back side of the protruding portion 46 at the lower end portion of the watt hour meter 40. The belt 33 is wound around. Thereafter, with the recorder 1 placed on the watt hour meter 40, the belt 33 is tightened, and the belt 33 is fixed by the fixture 34 while maintaining the tightened state.

  Next, the detectors 61 b, 62 b, 63 b connected to the current terminal 25 of the recorder 1 and the detectors 73 a, 74 a, 75 a connected to the voltage terminal 26 are connected to the low piezoelectric path 57 (distribution path) connected to the terminal block 47. 58 or indoor wiring 59), the front cover 52 of the meter box 50 is closed, and current and voltage measurement is started.

  When a predetermined period (for example, several days) elapses, the operator removes the recorder 1 from the watt hour meter 40 in a procedure reverse to the attachment procedure, and returns the meter box 50 to its original state.

  As described above, the recorder 1 according to the present embodiment is configured to be attached and fixed to the watt hour meter 40 by the belt 33 and the fixture 34 while being placed on the watt hour meter 40. It is configured so that measurement can be performed with a detector attached later. As a result, even when a long-term measurement is performed, the detector connected to the recorder 1 is disconnected or an extra force is applied to the detector due to dropping or movement of the recorder during measurement. This can be prevented and stable measurement can be realized.

  Here, since the belt 33 is hung and fixed so as to pass through the back side of the protruding portion 46 at the lower end portion of the watt-hour meter 40, the upper surface of the watt-hour meter has a shape unsuitable for installation of the recorder. Even in such a case, it is possible to prevent the position of the recorder 1 from being shifted or falling because the belt 33 is locked to the protruding portion 46. Further, since the groove portion 22a is attached and fixed so as to be applied to the locking portion 44, for example, even if a force that slides toward the front side is applied to the recorder 1, the groove portion 22a is attached to the locking portion 44. As a result, the recorder 1 can be prevented from moving toward the front side. The same applies when a force in another direction is applied to the recorder 1.

  Further, the mounting position of the recorder 1 (recorder main body 2) with respect to the watt hour meter 40 is defined by attaching and fixing the groove portion 22a to the locking portion 44, and the wireless communication section disposed on the substrate 10 The position of 16 (antenna 16a) is defined. More specifically, the wireless communication unit 16 (antenna 16a) is disposed on the front side of the recorder main body 2 and on the upper side of the center in the vertical direction in the mounting and fixing state (see FIG. 5 and FIG. 7). For example, the main body cover 42 of the watt-hour meter 40 may be made of metal, and if the wireless communication unit 16 (antenna 16a) is installed on the back side or the bottom side of the substrate 10, the communication performance may be deteriorated. Therefore, the communication performance of the wireless communication unit 16 is improved (for example, the connectivity is improved) by bringing the wireless communication unit 16 close to the front side and the upper side of the recorder main body 2 in this way. And extension of communication distance).

  While the preferred embodiments of the present invention have been described above, various modifications are possible.

-Modification-
For example, in the above embodiment, the recorder 1 is attached and fixed to the watt hour meter 40 so that the groove 22a of the recorder 1 is applied to the locking portion 44 of the watt hour meter 40. However, the present invention is not limited to this. For example, the same effect can be obtained by placing the recorder 1 in a flat region on the upper surface of the wattmeter 40 on the front side of the locking portion 44 and mounting and fixing the recorder 1 with the belt 33. The same applies to the attachment and fixing of the recorder 1 to the watt hour meter 40 that does not have the locking portion 44 on the upper surface. However, the effect of restricting the movement of the recorder 1 and preventing the dropping of the recorder 1 is further enhanced by attaching and fixing the groove 22a to the locking portion 44.

  In the above-described embodiment, the belt 33 is wound around the lower end portion of the watt hour meter 40 so as to pass through the back side of the protruding portion 46, and the recorder 1 is attached and fixed to the watt hour meter 40. It is not limited to. For example, the same effect can be obtained even when the belt 33 is wound around a flat region on the lower surface of the watt hour meter 40 on the front side of the protrusion 46. The same effect can be obtained for mounting and fixing the recorder 1 to the watt hour meter 40 that does not have the protrusion 46. However, the effect of restricting the movement of the recorder 1 and preventing the fall of the recorder 1 is further enhanced when the belt 33 is wound around the lower end portion of the watt-hour meter 40 so as to pass through the back side of the protruding portion 46.

  Moreover, in this embodiment, although the attachment means shall be comprised from the belt 33 and the fixing tool 34, it is not limited to this. For example, a concave portion 27, 27 is provided in the center of both side plates 23, 23 of the recorder 2, and a claw portion (not shown) is provided in the watt-hour meter 40 or the meter box 50, and the concave portion 27 and the claw portion are locked. The recorder 1 may be attached and fixed to the watt hour meter 40. Further, the belt 33 can be a stretchable belt or a non-stretchable belt, and the same effect can be obtained. When the belt 33 is a stretchable belt, the fixture 34 may not be provided.

  In the present embodiment, the low piezoelectric path 57 to be measured has been described as being a single-phase / three-phase three-wire system, but the present invention is not limited thereto, and the recorder according to the present invention is a single-phase two-wire system. The present invention can also be applied to the low piezoelectric path 57.

  Since the recorder according to the present invention is configured to enable stable measurement over a long period of time, it is extremely useful as a recorder that measures the voltage fluctuation state, load current state, and the like of the watt-hour meter.

DESCRIPTION OF SYMBOLS 1 Recorder 2 Recorder main body 16 Radio | wireless communication part 20 Housing | casing 22a Groove part 22b Plate-shaped closed part 33 Belt 40 Electric energy meter 44 Locking part (protrusion part)
50 meter box

Claims (5)

A recorder that can be installed in a watt hour meter having a protruding portion that protrudes upward from the upper surface, and that measures at least one of a voltage and a current of a power distribution path connected to the watt hour meter,
It has a recorder body including a rectangular box-shaped housing,
When the lower surface of the housing is placed on the upper surface of the watt hour meter, the recorder main body is hung around the side surface and the lower surface of the watt hour meter to place the power meter body on the power meter. A belt for mounting and fixing to the meter is provided,
On the lower surface of the housing, a groove extending in the extending direction of the belt is formed,
When the lower surface of the housing is placed on the upper surface of the watt hour meter, the groove portion is arranged such that the inner wall of the groove portion is applied to the protruding portion of the watt hour meter. A recorder that is configured to be able to regulate movement . The recorder according to claim 1,
Wherein the lower surface of the housing to close the part of the previous SL groove opening plate closing part is provided,
The belt is inserted between the groove portion and the plate-like closed portion, and is configured to be attached to and fixed to the watthour meter by being hung around a side surface and a lower surface of the watthour meter. Recorder characterized by being <br/>. The recorder according to claim 1 or 2 ,
The recorder main body includes a wireless communication unit that transmits and receives data to and from an external device,
The wireless communication unit is arranged so as to come to the front side of the recorder main body when the lower surface of the housing is placed on the upper surface of the watt-hour meter. . A installation structure for installing the recorder according to the meter box to any one of claims 1 to 3,
The recorder body has a vertical height smaller than a distance between the upper surface of the watt hour meter and an inner upper surface of the meter box, and a width in the extending direction is a distance between the inner surfaces of the meter box. An installation structure of a recorder , wherein the recorder box can be closed when the recorder body is attached and fixed to the watt hour meter by the belt . A fastening structure for fastening a recording meter for measuring at least one of a voltage and a current of a power distribution path connected to the watt hour meter to the watt hour meter,
The watt-hour meter is provided with a protruding portion that protrudes in the circumferential direction at an intermediate portion in the depth direction,
The recorder comprises a rectangular box-shaped housing,
The lower surface of the housing is provided with a groove portion extending in the longitudinal direction and a plate-like closing portion that closes a part of the opening of the groove portion,
The recorder is installed with the lower surface of the casing placed on the upper surface of the watt hour meter, and an attachment means having a belt inserted between the groove and the plate-like closed portion. It is wound around the side surface and the lower surface at the rear side of the projecting portion of the recording meter is fixedly attached to the electricity meter,
When the lower surface of the housing is placed on the upper surface of the watt hour meter, the groove portion is moved by the inner wall of the groove portion being applied to the protruding portion of the watt hour meter. Fastening structure characterized by being configured to be able to regulate .

Images