JP4527515B2 - Unit type energy meter - Google Patents

Description

  The present invention relates to a unit-type watt-hour meter in which various electric devices such as a watt-hour meter for measuring electric power are unitized and these device units are detachably mounted.

  There are various watt-hour meters for various purposes as watt-hour meters that measure the amount of power used by power consumers. For example, a general-purpose watt-hour meter is difficult for metered homes, and a watt-hour meter with built-in switch is difficult to read and stop for a house that is frequently changed by owners such as rental housing. A watt-hour meter for remote meter reading with a built-in wireless communication function is used in a house, and a watt-hour meter for each time zone is used when a meter is required for each time zone under a contract by time zone. That is, according to the attribute of a consumer, an watt hour meter suitable for the attribute is prepared and installed in each house or the like.

  However, in the operation as described above, it is necessary to install and manage various types of watt-hour meters as appropriate according to the owner's attributes. However, installation and management of the watt-hour meter are generally borne by the power company. For this reason, it is a factor that causes an increase in installation cost and management cost. Furthermore, a certain verification validity period (10 years) is set for the watt hour meter. When this period expires, it is necessary to replace the watt hour meter with a new watt hour meter. In the meantime, although the switch part does not require any special replacement, the entire exchange is forced to be completed if the validity period of the test expires. On the contrary, when a failure occurs in the switch part, it is necessary to replace the entire watt hour meter even though the watt hour meter is usable, and in any case, economic loss increases. There is an inconvenience.

On the other hand, in Patent Document 1, an installation space for a communication terminal station is provided in a watt-hour meter, and a plurality of types of packaged communication terminal stations (such as a wireless communication terminal station using PHS and a wired communication terminal station) are provided in the installation space. A watt-hour meter with a remote meter-reading function that can be selectively detached is disclosed. However, in the watt-hour meter that merely provides the installation space, there remains a problem of how to secure the operation power supply of the communication terminal station (device unit). In addition, if only the communication terminal station is selectively detachable, the watt-hour meter has various advanced functions and satisfies the above-mentioned replacement requirements for the validity period of the certification imposed on the watt-hour meter. However, the proposition of controlling economic losses cannot be solved.
JP 2001-93073 A

  The present invention has been made in view of such circumstances, and it is possible to cope with the multi-functionality of watt-hour meters, and does not require the preparation of various types of watt-hour meters. It is an object of the present invention to provide a unit-type watt-hour meter that can suppress the occurrence of mechanical loss.

A unit type watt-hour meter according to one aspect of the present invention includes a primary side terminal to which a lead-in line from a power transmission system is connected and a secondary side terminal to which a customer side wiring is connected, and extends from the primary side terminal. A first lead conductor and a second lead conductor extending from the secondary terminal, and a predetermined electrical connection between the primary terminal or secondary terminal and the first lead conductor or second lead conductor. A unit-type watt-hour meter comprising a unit joint having a number of first terminals provided on the surface and a device unit having a second terminal electrically connectable to the first terminal, In the equipment unit, the second terminal is electrically connected to the first terminal of the unit joint, so that the electrical device provided in the equipment unit and at least the primary terminal are electrically connected. And the Uni A plurality of unit sections on which a predetermined device unit is mounted are provided on the surface of the joint portion, and a first terminal corresponding to the second terminal of each device unit is disposed in each unit section. cage, as the equipment unit, a power meter unit for measuring the amount of power used by the customer, and the instrument current line load current flows, a metering electronic circuit for measuring the load current flowing through the regimen device current line And an optional equipment unit that operates by taking out a power supply voltage from the primary side terminal, and the unit section is mounted with the watt-hour unit, so that the first lead conductor And the second lead conductor are bridged by the instrument current line, the first target unit section, and the optional equipment unit is mounted, so that the optional equipment A second-purpose unit section in which the electrical device of the knit is operable, the power supply voltage for operating the metering electronic circuit and the power supply voltage of the optional equipment unit being the first lead conductor It is taken out from .

  According to such a unit-type watt-hour meter, a watt-hour meter unit responsible for the basic function of measuring the amount of power used is separated from an optional device unit for achieving multi-functionality, and a predetermined unit joint is provided. Since each unit is individually installed in the unit compartment, it is possible to respond to consumer attributes and multi-function by installing various optional equipment units, while the watt-hour meter unit itself is the consumer attribute. It is possible to use a common one regardless of the number of functions. In addition, if the second terminal of each device unit is electrically connected to the first terminal of the unit joint, the electrical device provided inside the device unit and at least the primary terminal are electrically connected. The device unit can be brought into an electrically operable state simply by being mounted in a predetermined unit section.

Furthermore, since the power supply voltage for operating the metering electronic circuit of the watt-hour meter unit and the power supply voltage of the optional device unit are taken out from the first lead conductor extending from the primary side terminal, the watt-hour meter unit It is possible to prevent the amount of power consumed by the weighing electronic circuit and the amount of power consumed by the optional device unit from being metered together with the amount of power consumed by the consumer.

  The said structure WHEREIN: It is desirable to comprise the said 1st terminal and 2nd terminal with the combination of a blade terminal and a blade receiving terminal (Claim 2). In the present invention, the constituent members of the first terminal and the second terminal are not particularly limited, and various electrical connection members can be used. For example, both are electrically connected by screw connection. There may be. However, if the blade terminal and the blade receiving terminal are combined, electrical connection is made simply by press-fitting the blade terminal into the blade receiving terminal. The quantity meter has the advantage that it can be easily attached and detached.

In the above configuration, the power supply voltage for operating the weighing electronic circuit and the power supply voltage of the optional device unit are from a bridge portion between the first lead conductor and the second lead conductor by the instrument current line. also in the far-end side when viewed from the primary side terminals, is Rukoto been taken out from the first lead conductors preferably (claim 3).

In the above configuration, the optional device unit mounted in the second target unit section is a communication terminal unit having a wireless communication function, and the electrical device provided in the communication terminal unit is a wireless communication device. When the communication terminal unit is mounted in the second target unit section, a power supply voltage is supplied to the power supply device via the primary terminal and the first lead conductor. it can be configured to be (claim 4). According to this configuration, a communication terminal unit useful for remote meter reading or the like can be made operable by securing an operating power supply only by being mounted in the second target unit section, and consumed by the communication terminal unit. It is possible to prevent the electric power charge to be a burden on the consumer.

Also, the unit sections may be further comprise and constitute the third object unit compartment that can be opened and closed an electrical path from said primary terminal to the secondary terminal (claim 5).

In this case, further comprises a switch unit as the optional equipment unit, the electrical device provided in the switch unit is a blocking circuit to perform opening and closing operations of the electrical path, mounting compartment of the switch unit but it is preferable to adopt a configuration which is defined in the unit section of the third object (claim 6).

  According to these configurations, it is possible to provide a unit-type watt-hour meter having an opening / closing operation function for power supply stop / release cancellation, for example, by simply installing the switch unit in the third purpose unit section. it can. That is, while using a general-purpose type watt-hour meter, it is possible to exert functions equivalent to those of a conventional switch built-in watt-hour meter. On the other hand, for customers who do not require the opening / closing function, if the operation is to install a short-circuit unit (switch unit that is always ON) in the third-purpose unit section, the same type of watt-hour meter unit is used. However, it can be set as the unit type watt-hour meter which has a function according to the attribute of each consumer.

In the above configuration, the unit compartment is configured to the viewed from the primary side terminals are arranged from the near-end side unit compartment of the third object, the unit section of the first object, in the order of units compartment of the second object (Claim 7 ). According to this configuration, a multi-function unit watt-hour meter including a communication terminal unit that operates without securing a separate operating power source, a switch unit having a power supply stop / stop release function, and a watt-hour meter unit Is realized.

In any of the configurations described above, the primary side terminal and the secondary side terminal may be configured as an integrated terminal block, and an uninterruptible bypass tool may be attached to the terminal block. Desirable (Claim 8 ). According to this configuration, when the device unit is removed from the predetermined unit section (when the device unit is replaced with another device unit), the operation can be performed without a power failure.

According to the unit-type watt-hour meter according to the present invention , it is possible to cope with consumer attributes and multi-functionality by attaching various optional equipment units to the unit joint according to needs, while the watt-hour meter unit itself is It is possible to use a common item regardless of the attribute and multi-functionality of the consumer. That is, as for the watt-hour meter unit, it is sufficient to prepare one general-purpose type that can be used for any consumer, and when other functions are required, it can be dealt with by appropriately installing an optional device unit. Therefore, it is possible to reduce the cost of the watt-hour meter unit including the management side, and when the valid period of the watt-hour meter unit expires, it is only necessary to replace this single-function watt-hour meter unit (optional). The equipment unit can be used continuously as it is), and an economical loss can be suppressed. In addition, since the device unit can be electrically operated simply by being mounted on a predetermined unit section, wiring work can be saved and the mounting workability is good.

In addition, it is not necessary for the equipment unit to have a built-in battery or to provide wiring for securing the operating power supply. No need to do it.

Furthermore, the amount of power consumed by the device units mounted in the first and second target unit sections is not measured in unison with the amount of power consumed by the consumer. Therefore, it is possible to make a system in which the electric energy charge consumed for operating the watt-hour meter unit and the optional equipment unit is not imposed on the customer who is the customer as viewed from the electric power company.

In addition, according to another embodiment of the present invention , since the electrical connection is made only by press-fitting the blade terminal into the blade receiving terminal, the unit can be easily attached and detached. Therefore, workability when attaching / detaching the unit can be improved.

In addition, a communication terminal unit useful for remote meter reading or the like can be put into an operable state by securing an operation power supply simply by being mounted in the second target unit section, and the amount of power consumed in the communication terminal unit. It is possible to prevent the charges from being borne by the consumer.

In addition, by providing a third-purpose unit section that can open and close the electrical path leading to the secondary terminal, it exhibits the same function as a conventional switch type watt-hour meter while using a general-purpose type watt-hour meter. It becomes possible to make it.

Moreover, it becomes possible to exhibit the function equivalent to the conventional switch-equipped watt-hour meter while using a general-purpose watt-hour meter. Further, when the validity period of the watt-hour meter unit expires, only the watt-hour meter unit needs to be replaced, and the open / close unit and the like attached to the third target unit section can be used as they are. Furthermore, for customers who do not require the switching function, it is only necessary to install a short-circuit unit (a switch unit that is always ON) in the third-purpose unit section. However, a common one can be used and the cost can be reduced.

In addition, a multi-function unit watt hour meter is realized that includes a communication terminal unit that operates without securing a separate operating power source, a switch unit having a power supply stop / stop release function, and a watt hour meter unit. . Therefore, it is possible to easily realize a unit-type watt-hour meter having a remote meter reading function and a power supply stop / stop release function.

In addition, when an equipment unit is removed from a predetermined unit compartment (when it is replaced with another equipment unit), it is possible to work without power failure, reducing work time and placing a burden on the customer on power outage. There is an effect that there is no.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a unit-type watt-hour meter 1 according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line XX of FIG. This unit type watt-hour meter 1 generally includes a terminal block 10 including a primary side terminal 11 to which a lead-in line from a power transmission system is connected and a secondary side terminal 12 to which a customer side wiring is connected, and the primary A unit joint portion 20 in which a predetermined number of blade receiving terminals (first terminals) electrically connected to the side terminal 11 or the secondary side terminal 12 are exposed on the surface; and the blade receiving terminal of the unit joint portion 20 It has a blade terminal (second terminal) that can be press-fitted (removably attached to the unit joint portion 20), and includes an equipment unit that performs various functions. In the present embodiment, as the device unit, an watt-hour meter unit 30 that measures the amount of power used by a consumer, and a communication terminal unit 40 and a switch unit 50 as optional device units are mounted. Is shown.

  The terminal block 10 includes a horizontally long rectangular casing 102 fixedly supported by a mounting substrate 101, a primary side terminal 11 and a secondary side terminal 12 disposed in the casing 102, a LAN cable insertion portion 13, and a later-described terminal block 10. It is comprised from the installation screw hole part 141 and 142 of the uninterruptible bypass tool to do. That is, the terminal block 10 is formed by integrating the primary side terminal 11 and the secondary side terminal 12. In this embodiment, since the unit type watt-hour meter 1 used for the single-phase three-wire type power receiver is illustrated, the primary side terminal 11 has three terminals 111, 112, and 113 ( The central terminal 112 is a neutral wire terminal). Correspondingly, the secondary terminal 12 also has three terminals 121, 122, 123.

  As shown in FIG. 2, the terminal 121 (the same applies to the other terminals 111, 112, 113, 122, and 123) is composed of a terminal fitting 124 having a conductor insertion hole 125, and is an opening hole provided in the casing 102. The conductor insertion hole 125 is aligned with 1021 and attached to the inside of the casing 102. In the conductor insertion hole 125, the conductor of the electric wire terminal portion (in this case, the terminal portion of the customer side wiring) is inserted through the opening hole 1021, and the electric wire terminal portion is a fixing screw provided in the terminal fitting 124. The screw is fixed at 126. The other end 127 of the terminal fitting 124 is fixed to a lead conductor 65 that is electrically connected to a blade receiving terminal 522 described later by an attachment screw 128.

  In this way, the terminal conductors of the lead wires from the power transmission system are connected to the terminals 111, 112, and 113 constituting the primary side terminal 11, and the terminals 121, 122, and 123 constituting the secondary side terminal 12 are The terminal part conductor of a customer side wiring is each attached. The LAN cable insertion unit 13 serves as a port for connecting a LAN cable in order to connect the unit-type watt-hour meter 1 to a local area network or the like built in a consumer, for example, for the purpose of automatic meter reading. It is.

  The unit joint portion 20 is configured by attaching a housing 20F (see FIG. 2) including a cover plate 21 and a bottom plate 25 to the inside of a metal frame member 103 having a square box shape. At three locations on the side edge of the metal frame member 103, flange portions having screw holes 104 project, and a transparent protective cover member C covers the front opening of the housing 20F using the screw holes 104. It is attached as follows. Note that the mounting substrate 101 of the terminal block 10 is welded and integrated with the metal frame member 103.

  A plurality of unit sections 300, 400, and 500 are provided on the surface of the unit joint portion 20, that is, the surface of the cover plate 21, to which predetermined equipment units according to purposes are mounted. That is, a first target unit section 300 (a first target unit section 300 for bridging the primary side terminal 11 and the secondary side terminal 12) for mounting the watt-hour meter unit 30, and a communication terminal unit 40 are provided. Second-purpose unit section 400 for mounting (second-purpose unit section 400 for extracting power supply voltage from the primary terminal 11) and third-purpose unit section 500 for mounting the switch unit 50 (secondary side) A third purpose unit section 500) is provided that allows the electrical path leading to the terminal 12 to be opened and closed. These unit sections 300, 400, and 500 are sections that are appropriately determined according to the equipment unit that is scheduled to be mounted.

  In each unit section 300, 400, 500, a predetermined number of blade receiving terminals (first terminals) corresponding to the blade terminals included in each device unit are provided. In the unit section 300 for the first purpose, blade receiving terminals 311 and 312 as current terminals electrically connected to the two-phase terminals 111 and 113, respectively, excluding the neutral wire of the primary side terminal 11, as well as Blade receiving terminals 321 and 322 as current terminals electrically connected to the two-phase terminals 121 and 123 excluding the neutral wires of the secondary terminal 12, and the terminals 111 and 112 of the primary terminal 11, respectively. Blade receiving terminals 331, 332, and 333 as voltage terminals electrically connected to 113 are arranged so as to be exposed on the surface of the unit joint portion 20.

  The second target unit section 400 is arranged on the far end side as viewed from the terminal block 10 with respect to the first target unit section 300, and each terminal 111 of the primary side terminal 11 is included in the second target unit section 400. , 112, 113 are arranged as blade terminals 411, 412, 413 as voltage terminals. The third-purpose unit section 500 is disposed closer to the near-end side as viewed from the terminal block 10 than the first-purpose unit section 300, and each terminal of the primary-side terminal 11 is included in the third-purpose unit section 500. 111, 112, 113 for configuring the electrical path to blade receiving terminals 511, 512, 513 as voltage terminals that are electrically connected to each other and one terminal 121 constituting the secondary side terminal 12. Blade receiving terminals 521 and 522 and blade receiving terminals 531 and 532 for constituting an electrical path to other terminals 123 are arranged.

  FIG. 3 is a front view of the unit-type watt-hour meter 1 with the cover plate 21 removed, and FIG. 4 is a front view of the cover plate 21. On the bottom plate 25, lead conductors 61, 62, and 63 that electrically connect the terminals 111, 112, and 113 of the primary terminal 11 and the blade receiving terminals, respectively, are provided via insulating projections 251 and 252 for partitioning. Are stored in parallel. That is, the end portion of the lead conductor 61 is screwed to the terminal 111 (see the cross-sectional view of FIG. 2). The lead conductor 61 has a blade receiving terminal 311 as a current terminal and a blade receiving terminal 331 as a voltage terminal. , 411, 511 are installed. The lead conductor and the blade receiving terminal may be an integrated structure in which an integral metal member is bent or a separate structure in which the blade receiving terminal is riveted to a flat lead conductor. Similarly, an end of a lead conductor 62 is connected to the terminal 112, and blade receiving terminals 332, 412, 512 as voltage terminals are installed on the lead conductor 62. Further, the end of the lead conductor 63 is connected to the terminal 113, and a blade receiving terminal 312 as a current terminal and blade receiving terminals 333, 413, and 513 as voltage terminals are installed on the lead conductor 63. .

  Furthermore, lead conductors 64, 65, 66, and 67 that electrically connect the terminals 121 and 123 of the secondary side terminal 12 and the respective blade receiving terminals are accommodated in the bottom plate 25 in parallel. A first lead conductor 64 and a second lead conductor 65 are arranged with respect to the terminal 121, and blade receiving terminals 321 and 521 as current terminals are provided on the first lead conductor 64, and the second lead conductor 65. Are each provided with blade receiving terminals 522 as current terminals. Similarly, a first lead conductor 66 and a second lead conductor 67 are arranged for the terminal 123, and blade receiving terminals 322 and 531 as current terminals are provided on the first lead conductor 66, The lead conductor 67 is provided with blade receiving terminals 532 as current terminals. Insulating protrusions 253 for partitioning are provided between the lead conductors 64 and 65 and the lead conductor 63.

  A gap G is provided between the first lead conductors 64 and 66 and the second lead conductors 65 and 67 (electrically cut off). That is, as shown in FIG. 2, one end side of the second lead conductor 65 is connected to the terminal fitting 124 of the terminal 121 by the mounting screw 128, but the other end side protrudes from the cover plate 21. It is in contact with the insulating portion 228. This is because the breaker circuit provided in the switch unit 50 is connected between the blade receiving terminals 521 and 522 and between the blade receiving terminals 531 and 532, and the switch unit 50 leads from the primary side terminal 11 to the secondary side terminal 12. This is because the electrical path is opened and closed.

  The bottom plate 25 is provided with screw hole portions 2531, 2532, 2541, 2542, 2551 and 2552 at six locations. Among these, the screw hole portions 2531 and 2532 are provided corresponding to the unit section 300 for the first purpose, and are used for attaching the watt-hour unit 30. Further, the screw hole portions 2541 and 2542 are provided corresponding to the second target unit section 400, and the screw hole portions 2551 and 2552 are further used for mounting the communication terminal unit 40, and the third target unit section is provided. 500, and is used for mounting the switch unit 50, respectively.

  And as shown in FIG. 4, an opening part is provided in the predetermined position of the cover board 21 so that each said blade receiving terminal may be exposed to the surface of the unit junction part 20, respectively. That is, the cover plate 21 has openings 214, 215, 216, and 217 corresponding to the blade receiving terminals 311, 312, 321, and 322 as current terminals located in the region of the first target unit section 300. It has been. The cover plate 21 is provided with openings 218, 219, and 220 corresponding to the blade receiving terminals 331, 332, and 333 as voltage terminals, respectively.

  Similarly, openings 211, 212, and 213 are provided in the cover plate 21 so as to correspond to the blade receiving terminals 411, 412, and 413 as voltage terminals located in the region of the second target unit section 400. . Furthermore, the cover plate 21 is provided with openings 224, 225, 226, and 227 corresponding to the blade receiving terminals 521, 522, 531, and 532 as current terminals located in the region of the third target unit section 500, respectively. It has been. The cover plate 21 is provided with openings 221, 222, and 223 corresponding to the blade receiving terminals 511, 512, and 513 as voltage terminals.

  The blade receiving terminals and the openings of the cover plate 21 installed as described above are appropriately set according to the device units attached to the unit sections 300, 400, 500. In other words, the area of each unit section 300, 400, 500 is set according to the installation location of the blade receiving terminal. In this embodiment, the watt-hour meter unit 30 is attached to the unit section 300 for the first purpose. In this case, the primary side terminal 111 and the secondary side terminal 123, and the primary side terminal 113 and the secondary side are provided. Therefore, the blade receiving terminals 311, 312, 321, and 322 are installed in response to this request.

  In addition, since the communication terminal station unit 40 is mounted in the second-purpose unit section 400, the operating power of the communication terminal station unit 40 can be taken out from the terminals 111, 112, 113 constituting the primary side terminal 11. The blade receiving terminals 411, 412, and 413 connected to the respective terminals are installed. Further, since the switch unit 50 is mounted in the third-purpose unit section 500, the electrical path from the primary side terminal 11 to the secondary side terminal 12 by the breaking circuit provided in the switch unit 50 as described above. Blade receiving terminals 521, 522, 531 and 532 are installed so that the opening / closing operation can be performed.

  5A and 5B are perspective views showing an example of the watt-hour meter unit 30, in which FIG. 5A shows a front perspective view, and FIG. 5B shows a rear perspective view. This watt-hour meter unit 30 is an electronic watt-hour meter, and as shown in FIG. 5A, a measured value display unit 31 for digitally displaying the measured amount of power on the front side and a measurement pulse are emitted. A measurement pulse transmission unit 32 that displays with a diode or the like, and an operation display unit 33 that displays different operation states such as a measurement operation state, a no-measurement state, and a power failure state are provided.

On the other hand, as shown in FIG. 5B, a predetermined blade terminal (second terminal) protrudes from the back side. That is, blade terminals 311 a, 312 a, 321 a, and 322 a as current terminals are respectively provided so as to correspond to the blade receiving terminals 311, 312, 321, and 322 of the unit joint portion 20. In addition, blade terminals 331a, 332a, and 333a as voltage terminals protrude from the blade receiving terminals 331, 332, and 333, respectively. Furthermore, flange portions 341 and 342 with screw holes for fixing the watt-hour meter unit 30 to the unit joint portion 20 are provided at two places on the left and right sides of the back plate, and the flange portions 341 and 342 and the unit joint portion are attached when mounted. The screw holes 2531 and 2532 provided in the bottom plate 25 of the 20 are aligned, and the watt-hour meter unit 30 is fixed with screws.

  6 and 7 are diagrams showing the relationship between the above-described blade receiving terminals 311 and 312 and the blade terminals 311a and 312a. The blade receiving terminal 311 (312) has a pair of widening tapered surfaces 3111 and 3112 for guiding the blade edge portion 311S of the blade terminal 311a (312a) and the blade terminal 311a with a biasing force when the blade terminal 311a is press-fitted. It comprises a sandwiching portion 3113 for sandwiching and body portions 3114 and 3115 connected to the sandwiching portion 3113. The blade receiving terminal 311 is made of a copper alloy or the like, and is formed by, for example, further bending a copper alloy piece punched integrally with the lead conductor 61 portion.

  The slit width of the clamping portion 3113 is narrower than the thickness width W of the blade terminal 311a. The blade receiving terminal 311 and the blade terminal 311a are surely electrically connected with the urging force applied. The blade receiving terminal 311 is fixed to the bottom plate 25 with a fixing screw 3117 via a washer 3116.

  The blade terminals 311a and 322a as the current terminals of the watt-hour unit 30 and the blade terminals 312a and 322a are bridged by an internal electric circuit (instrument current line) of the watt-hour unit 30, respectively. The amount of current (load current) flowing through is integrated and measured using a current transformer or the like. On the other hand, the blade terminals 331a, 332a, and 333a as voltage terminals are connected to an electronic circuit or the like provided in the watt-hour meter unit 30, and used as an operation power source for the electronic circuit or the like.

  Thus, by providing the watt-hour meter unit 30 with a current terminal and a voltage terminal, it has conventionally been necessary to provide a test terminal for performing an operation test (certification test) of the watt-hour meter on the terminal block 10. However, there is an advantage that the installation of the test terminal can be omitted. In other words, in order to perform an operation test of a watt hour meter, it is necessary to apply a current and a voltage from different application terminals because of the influence of the phase. Since the terminal exists only in the terminal block part, the current application terminal and the voltage application terminal are provided in the terminal block part only for the operation test. However, if the blade terminals 311a, 322a, 312a, and 322a as current terminals and the blade terminals 331a, 332a, and 333a as voltage terminals are provided as in the watt-hour meter unit 30 of this embodiment, By using the blade terminal as a current application terminal and a voltage application terminal, the watt-hour unit 30 can be used for a verification test. Furthermore, the conventional watt-hour meter has a problem of illegal measurement by misusing the test terminal. However, according to the watt-hour meter unit 30 of the present embodiment, there is an advantage that the fear of the illegal measurement can be eliminated. .

  As described above, the watt-hour meter unit 30 has been described as an example of the device unit attached to the unit joint portion 20. However, other device units, that is, the communication terminal unit 40 as an optional device unit, and the switch unit 50 are described. Since the mounting mode to the unit joint portion 20 is substantially the same as described above, the description thereof is omitted.

  The communication terminal unit 40 is provided, for example, for performing remote meter reading for transmitting the amount of power measured by the watt-hour meter unit 30 to a remote place by wireless communication. The communication terminal unit 40 can use a wireless communication device including an antenna and a communication control unit, and a power supply circuit that supplies an operation power to an electronic circuit constituting the communication control unit. The blade terminals connected to the power supply circuit may be provided in the communication terminal unit 40 so as to correspond to the blade receiving terminals 411, 412, and 413 of the unit joint portion 20.

  As the switch unit 50, a switch provided with a breaking circuit for performing an opening / closing operation of an electric path can be used, and a manual operation type equipped with a simple mechanical contact switch, an electronic breaker circuit and an automatic contact switch can be used. The equipped remote control type can be used. The blade receiving terminals 511, 512, and 513 as voltage terminals installed in the third-purpose unit section 500 are for taking out the operating power of the electronic cutoff circuit as described above. Therefore, when only the manual operation type switch unit 50 is scheduled to be mounted, the blade receiving terminals 511, 512, and 513 can be omitted.

  As the optional device unit, a device unit having various functions other than the above can be applied. For example, when it is necessary to measure by time zone in the contract by time zone, the watt hour meter used in a specific time zone among the power usage metered by the watt hour meter unit 30, for example, the power usage in midnight time zone A display device unit that displays the amount separately may be mentioned. Since such a display device unit requires only an operating power supply, it may be mounted on the second unit partition 400. Further, for example, an optical communication function composed of a light emitting element and a light receiving element may be provided in the wattmeter unit 30 and the display device unit so that the metering information on the wattmeter used can be exchanged from the wattmeter unit 30. good.

  In addition, for example, when a prepaid device unit that supplies an amount of power corresponding to a prepaid fee or a consumer having a function of private power generation (solar cell power generation, etc.) sells power, the generated power is monitored and the line is opened and closed. A monitoring / control unit that performs the above and the like can be exemplified. As the former prepaid device unit, a unit in which a prepaid counter mechanism capable of remote input is added to the communication terminal unit 40 can be used. As the latter monitoring / control unit, a unit obtained by adding a distributed power source monitoring mechanism and a control mechanism to the switch unit can be used.

  In the unit-type watt-hour meter 1 according to the present invention, a watt-hour meter unit 30 is mounted as an essential device unit for a plurality of unit sections provided in the unit joint portion 20, and an optional device is provided in the other unit sections. The unit can be mounted. FIG. 8 is a plan view schematically showing the usage state of the unit-type watt-hour meter 1 according to the embodiment described above, in which only the watt-hour meter unit 30 is mounted on the unit partition 300 for the first purpose. The two-purpose unit section 400 and the third-purpose unit section 500 show a state where no option device unit is mounted. Such a usage mode is the simplest usage mode of the unit-type watt-hour meter 1, and most of the units for general houses are set as such usage modes.

  FIG. 9 is a circuit diagram showing a connection state in the case of use as shown in FIG. As described above, since the watt-hour meter unit 30 is attached to the unit section 300 for the first purpose, the watt-hour meter is provided between the blade receiving terminals 311 and 322 and between the blade receiving terminals 312 and 321. The unit 30 is bridged by an instrument current line. On the other hand, since the second-purpose unit section 400 is in an empty state, the blade receiving terminals 411, 412, and 413 can be used as the power supply unit A. In addition, since the third-purpose unit section 500 is also empty, the blade receiving terminals 521 and 522 and the blade receiving terminals 531 and 532 can be used as the opening / closing operation unit B. When only the watt-hour meter unit 30 is mounted for actual use, the receiving terminals 521 and 522 and the blade receiving terminals 531 and 532 are short-circuited by a short-circuit unit.

  FIG. 10 is a plan view schematically showing a usage mode in which various device units are mounted in the second-purpose unit section 400 and the third-purpose unit section 500 which are the mounting sections of the optional device units. In FIG. 10A, the watt-hour meter unit 30 is mounted in the first target unit section 300, the communication terminal unit 40 is mounted in the second target unit section 400, and the third target unit section 500 is empty. The usage mode assumed to be in a state is shown. According to this usage mode, remote meter reading using the communication terminal unit 40 can be performed.

  FIG. 10B shows a usage mode in which the watt-hour meter unit 30 and the communication terminal unit 40 are similarly mounted, and the switch unit 50 is mounted in the third-purpose unit section 500. According to this usage mode (same as the usage mode shown in FIG. 1 and the like), remote meter reading using the communication terminal unit 40 can be performed, and the power supply stop / stop release operation for the consumer is a switch unit. You can do it at 50.

  FIG. 10C shows that the watt-hour meter unit 30 is mounted in the first target unit section 300, the display unit 41 is mounted in the second target unit section 400, and the third target unit section 500 is empty. The usage mode which is said to be shown. According to this usage mode, the power usage amount in a specific time zone can be displayed on the display device unit 41 when metering is required for each time zone in a contract by time zone.

  FIG. 10D shows that the watt-hour meter unit 30 is mounted in the first target unit section 300, the prepaid device unit 42 is mounted in the second target unit section 400, and the switch is connected to the third target unit section 500. The use mode in which the unit 50 is mounted is shown. According to this usage mode, a prepaid counter function can be added in addition to the functions in the usage mode of FIG.

  FIG. 10 (e) shows a usage in which the watt-hour meter unit 30 and the communication terminal unit 40 are installed as in FIG. 10 (b), and the monitoring / control unit 51 is installed in the unit section 500 for the third purpose. An embodiment is shown. According to this usage mode, when a consumer sells power, a function of monitoring the generated power and opening / closing a line can be added.

  As is apparent from the above usage modes, this unit-type watt-hour meter has the watt-hour meter unit 30 that measures the amount of power used by consumers as an essential mounting unit, and separate equipment units that perform other functions. Therefore, when the verification valid period of the watt-hour meter unit 20 has expired, it is only necessary to replace this single-function watt-hour meter unit 20 (for optional device units). It can continue to be used as it is), and economic loss can be suppressed.

  In addition, regarding the arrangement relationship of the first target unit section 300 and the second target unit section 400 on the unit joint portion 20, the watt-hour unit 30 is mounted on the second target unit section 400 where power is consumed. The amount of power consumed by the device unit mounted on the second target unit section 400 is determined by being arranged on the far end side as viewed from the primary terminal 11 with respect to the first target unit section 300. It is desirable that the meter unit 30 be configured not to be weighed. This is because it is not appropriate to pass on the power charge of the power consumed by such an optional device unit to the customer. In consideration of this point, in the usage forms shown in FIGS. 8 and 10, the third-purpose unit section 500 including the opening / closing operation unit B and the watt-hour meter unit 30 from the near end side as viewed from the primary terminal 11. 1 shows an example of arrangement in order of a first target unit section 300 on which the power is mounted and a second target unit section 400 including the power supply unit A.

  FIG. 11 is a schematic circuit diagram for explaining such an operation. The blade receiving terminal which is the power supply unit A of the second target unit section 400 by disposing the second target unit section 400 on the far end side as viewed from the primary terminal 11 with respect to the first target unit section 300. The current Im flowing to the device unit via 411, 412, 413, that is, the consumption current Im consumed by the communication terminal unit 40 or the like does not pass through the current transformer CT for measuring the electric energy.

  That is, since the load current I0 flowing to the load existing in the consumer flows through the meter current line provided in the watt-hour meter unit 30, it is measured by the current transformer CT coupled to the meter current line. However, since the blade receiving terminals 311 and 322 and the blade receiving terminals 312 and 321 that are bridged by the instrument current line are located closer to the primary terminal 11 than the power supply unit A, Even if a load is connected to the part A, the consumption current Im does not flow through the meter current line, and therefore is not measured by the watt-hour meter unit 30. In addition, according to this embodiment, the blade receiving terminals 331, 332, and 333, which are the operation power take-out portions of the metering electronic circuit of the watt-hour unit 30, are also viewed from the primary terminal 11 with respect to the blade receiving terminals 311 and 322. Since it is arrange | positioned at the far end side, the electric power consumed in order to operate the watt-hour meter unit 30 can also be made not to become a burden of a consumer.

  When attaching / detaching the device unit as described above to / from the unit joint portion 20, it is desirable to avoid a power failure as much as possible. For this reason, when attaching and removing various equipment units, the operation is performed after the uninterruptible bypass tool is attached to the terminal block 10.

  FIG. 12 shows an example of such an uninterruptible bypass tool 60. FIG. 12 (a) shows a side sectional view and FIG. 12 (b) shows a sectional view showing an internal wiring structure. The uninterruptible bypass tool 60 includes a main body casing 600, four conduction pins 61, 62, 63, 64 that protrude from the main body casing 600, and conductive plates 651, 652 disposed inside the main body casing 600. And fixing screws 661 and 662 disposed at the left and right ends of the main body casing 600.

  Biasing springs 611, 612, 613, and 614 are arranged on the base side of each of the conduction pins 61, 62, 63, and 64, respectively. A biasing force is applied in the protruding direction. The conduction pins 61 and 64 are made conductive by the conductive plate 651, and the conduction pins 62 and 63 are made conductive by the conductive plate 651.

  When the uninterruptible bypass tool 60 is attached to the terminal block 10, the fixing screws 661 and 662 are attached by screwing into the attachment screw holes 141 and 142 provided in the terminal block 10. In this case, for example, with the conduction pin 63, the tip end portion S abuts on the terminal fitting 124 shown in FIG. 2 with the urging force of the urging spring 613. That is, the leading end S of the conduction pin 63 enters the space H (see FIG. 2) where the terminal fitting 124 of the terminal block 10 is exposed, and the secondary-side terminal 121 and the conduction pin 63 become conductive. Similarly, the conduction pin 61 is in conduction with the primary side terminal 111, the conduction pin 62 is in conduction with the primary side terminal 113, and the conduction pin 64 is in conduction with the secondary side terminal 123. Accordingly, when the uninterruptible bypass tool 60 is attached to the terminal block 10, the primary side terminal 111 and the secondary side terminal 123 and the primary side terminal 113 and the secondary side terminal 121 are connected by the conductive plates 651 and 652. Are short-circuited.

  Thus, when the uninterruptible bypass tool 60 is attached, even if the watt-hour meter unit 30 serving to bridge the primary side terminal 11 and the secondary side terminal 12 is removed from the first target unit section 300, Since the electrical path from the primary side terminal 11 to the secondary side terminal 12 is secured by the conductive plates 651 and 652 of the uninterruptible bypass tool 60, it is possible to secure power supply to consumers. Accordingly, it is possible to perform the replacement operation of the equipment unit mounted on the unit joint portion 20 such as the watt-hour meter unit 30 without interruption of power.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this. For example, the shape of the blade terminal provided in the equipment unit and the shape of the blade receiving terminal provided in the unit joint are arbitrary, and in a mode in which both terminals can be substantially engaged to ensure stable electrical conduction. Any shape can be used. Alternatively, instead of the combination of the blade terminal and the blade receiving terminal, the first terminal and the second terminal may be electrically connected by screw connection. Moreover, although the example which set the unit division of the 1st-3rd objective was demonstrated about the unit division, more divisions may be set or it is good also as 2 divisions simply.

It is a front view showing unit type watt-hour meter 1 concerning one embodiment of the present invention. It is the XX sectional view taken on the line of FIG. In FIG. 1, it is a front view which shows the unit type watt-hour meter 1 of the state which removed the cover board 21. FIG. 3 is a front view of a cover plate 21. FIG. It is a perspective view which shows an example of the watt-hour meter unit, Comprising: (a) is a perspective view of a front direction, (b) has each shown the perspective view of a back direction. It is a perspective view which shows the relationship between a blade receiving terminal and a blade terminal. It is sectional drawing which shows the state by which the blade terminal was press-fitted in the blade receiving terminal. 2 is a plan view schematically showing a usage state of the unit type watt-hour meter 1. FIG. It is a circuit diagram which shows the connection state in the case of a usage condition as shown in FIG. It is a top view which shows typically the usage condition which mounted | worn with various apparatus units in the unit section 400 of the 2nd objective which is the mounting part of an option apparatus unit, and the unit section 500 of the 3rd objective. It is a circuit diagram for demonstrating the power consumption state in the unit division 400 of the 2nd objective. An example of the uninterruptible bypass tool 60 is shown, in which (a) shows a side sectional view and (b) shows a sectional view showing an internal wiring structure.

DESCRIPTION OF SYMBOLS 1 Unit type watt-hour meter 10 Terminal block 11 Primary side terminal 12 Secondary side terminal 20 Unit joint part 21 Cover plate 25 Bottom plate 30 Electric energy meter unit (equipment unit)
300 Unit division for first purpose 40 Communication terminal unit (equipment unit)
400 Unit division for second purpose 50 Switch unit (equipment unit)
500 Unit section 311, 312, 321, 322, 331, 332, 333, 411, 412, 413, 511, 512, 513, 521, 522, 531, 532 Blade receiving terminal (first terminal)
311a, 312a, 321a, 322a, 331a, 332a, 333a Blade terminal (second terminal)
60 Uninterruptible bypass tool

Claims (8)

A primary side terminal to which a lead-in line from a power transmission system is connected and a secondary side terminal to which a customer side wiring is connected, a first lead conductor extending from the primary side terminal, and a secondary side terminal are extended. a second lead conductor, unit first terminal of a predetermined number which is electrically connected through the primary-side terminal or the secondary-side terminal and the first lead conductor or the second lead conductors are provided on the surface joint And a unit type watt-hour meter comprising a device unit having a second terminal electrically connectable to the first terminal,
In the device unit, the second terminal is electrically connected to the first terminal of the unit joint, so that the electrical device provided in the device unit and at least the primary terminal are electrically connected. And
A plurality of unit sections to which predetermined device units are mounted are provided on the surface of the unit joint, and first terminals corresponding to the second terminals of the respective device units are disposed in the respective unit sections. And
The device unit is a watt-hour meter unit that measures the amount of power used by a consumer, and includes a meter current line through which a load current flows, and a metering electronic circuit that measures a load current through the meter current line An watt-hour meter unit, and an optional device unit that operates by taking out a power supply voltage from the primary side terminal,
The unit section includes a first-purpose unit section in which the first lead conductor and the second lead conductor are bridged by the instrument current line by mounting the watt-hour meter unit, and the optional device. A second-purpose unit section in which the electrical device of the optional device unit can be operated by mounting the unit;
A unit-type watt-hour meter , wherein a power supply voltage for operating the measuring electronic circuit and a power supply voltage of the optional device unit are taken out from the first lead conductor .   The unit-type watt-hour meter according to claim 1, wherein the first terminal and the second terminal are configured by a combination of a blade terminal and a blade receiving terminal. The power supply voltage for operating the weighing electronic circuit and the power supply voltage of the optional equipment unit are from the primary terminal rather than the bridge between the first lead conductor and the second lead conductor by the instrument current line. The unit-type watt-hour meter according to claim 1, wherein the unit-type watt-hour meter is taken out from the first lead conductor at a far end side when viewed . The optional device unit mounted in the second target unit section is a communication terminal unit having a wireless communication function, and an electrical device provided in the communication terminal unit is a power source for operating the wireless communication device. A device,
The power supply voltage is supplied to the power supply device via the primary terminal and the first lead conductor by mounting the communication terminal unit in the unit section for the second purpose. The unit type electricity meter in any one of 1-3 . Said unit compartment unit according to any of claims 1 to 4, characterized in that said from the primary terminal further comprises a unit section of a third object that can be opened and closed an electrical path to the secondary-side terminal Type electricity meter. The optional device unit further includes a switch unit, and the electrical device provided in the switch unit is a cutoff circuit for performing an opening / closing operation of the electrical path,
6. The unit-type watt-hour meter according to claim 5 , wherein a mounting section of the switch unit is defined as the third-purpose unit section. Said unit compartment claims, characterized in that the as viewed from the primary side terminals are arranged from the near-end side unit compartment of the third object, the unit section of the first object, in the order of units compartment of the second object 6. The unit type energy meter according to 6 . Primary terminal and the secondary terminal is any of claims 1-7, characterized in that is constituted by an integrated terminal block, the said terminal block uninterruptible bypass tool is attachable The unit type watt-hour meter as described in Crab.

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