KR200453737Y1 - Electronic watt-hour meter - Google Patents

Abstract

An electronic wattmeter is disclosed. The electronic wattmeter according to the present invention includes a housing having an open hexahedron shape on one side and an inner space, and a housing for accommodating a PLC cable and a data communication cable in the inner space and a screw housing assembled on an open side of the housing to close the housing. The housing includes: a first through hole formed on one side wall of the housing to seat a connector included in the data communication cable, a second through hole formed below the first through hole in the housing to seat the connector of the PLC cable, The U-shaped support part is spaced apart from the first through hole at a position facing the first through hole in the inner space of the housing, and is inserted into the first through hole and the second through hole from the outside of the housing. The apparatus further includes an insulating protective cover for protecting the connector of the cable and the data communication cable.

Electronic meter, insulation protective cover, communication

Description

Electronic Wattmeter {Electronic watt-hour meter}

The present invention relates to an electronic electricity meter, and more particularly, to an electronic electricity meter that can selectively use a communication function capable of remote meter reading.

A power meter is a device that measures various power consumption such as active power (kWh), reactive power (kvarh), demand power (Demand) and power factor (PF) within an allowable error range and displays the value. It is divided into (induction) electricity meter and electronic (digital) electricity meter.

In general, an electronic electricity meter receives a voltage and a current signal, processes multiplication and integration, and displays the measured amount of power on a display unit to measure the amount of power used in a general house, a building, or a factory.

Recently, electronic watt-hour meters have been developed to enable remote meter reading of data on power consumption of each electronically measured electric power user in real time using a predetermined communication method. To this end, it is necessary to supply an electronic electricity meter (ie, smart meter) capable of time-based metering and bidirectional communication.

However, smart meters are currently being distributed only in high pressure consumers such as buildings and factories in Korea, and low pressure consumers, such as houses and shopping malls, are extremely low. Therefore, in order to disseminate the smart meter to low-pressure consumer, it is classified into economic type with low price and general type with additional possibility such as power factor and peak management in consideration of economic efficiency and efficiency.

On the other hand, the economic type and the general type smart meter may be installed with a communication cable for the remote meter reading. This communication cable is exposed on the side wall of the housing of the smart meter to be connected to an external communication cable. Therefore, there is a risk of electric shock, and when considering the use of the electricity meter for several years, there is a fear of contamination and damage by the external environment.

In addition, the electronic wattmeter is generally subjected to an electrostatic test and a voltage shock test, etc. before it is commercially available, in which instantaneous high voltage is applied to the communication cable exposed to the housing sidewall of the electronic wattmeter. In this process, there was a problem that the communication cable is damaged.

The present invention is to solve the above-described problems, and to provide an electronic power meter that can protect the communication cable seated in the through-hole by inserting an insulating protective cover on the through-hole formed in the housing side wall of the electronic power meter.

An electronic watt-hour meter according to an embodiment of the present invention for achieving the above object includes a housing having an open hexahedron shape on one surface thereof, and a housing accommodating a PLC cable and a data communication cable in the inner space. And a transparent housing cover screwed to an open surface of the housing to close the housing, wherein the housing is formed on one sidewall of the housing to seat a connector included in the data communication cable in the housing. A second through hole formed below the first through hole and seating the connector of the PLC cable, and spaced apart from the first through hole at a position facing the first through hole in the inner space of the housing; U-shaped support for supporting the connector of the communication cable and the first through hole on the outside of the housing The second inserted into the through-hole further includes an insulating protective cover which protects the PLC cable and each of the data communication cable connector.

In this case, the insulating protective cover is preferably made of a rubber material having flexibility and elasticity.

On the other hand, the connector of the data communication cable is placed on the U-shaped support in the inner space of the housing may be forced to be seated in the first through-hole direction.

In addition, the connector of the data communication cable is formed to protrude to the outside along the outer circumferential surface of the body and the engaging projection projected on the U-shaped support and the outer peripheral surface of the body is screwed to the U-shaped support to the U-shaped support portion And a nut screw for fixing the connector of the data communication cable together with the engaging protrusion facing each other.

Meanwhile, the connector of the PLC cable may be forcedly seated in the direction of the second through hole from the outside of the housing.

In addition, the connector of the PLC cable has a diameter larger than that of the second through hole and surrounds the edge of the second through hole, the head which is caught on the outer edge of the second through hole of the housing, the head is connected to the second A catching member formed on both sides of the body and the side of the body passing through the through-hole, and elastically protruding in a state in which the body is press-fitted into the second through-hole to be caught in the second through-hole to fix the body. Include.

Meanwhile, a PCB substrate, a display element, and a current transformer may be further accommodated in the inner space of the housing.

According to the present invention, by inserting an insulating protective cover on the through hole formed in the side wall of the electronic watt-hour meter, it is possible to prevent safety accidents due to the data communication cable and the PLC cable seated in the through hole. In addition, it is possible to protect the data communication cable and PLC cable from the external environment to prevent contamination and breakage.

In addition, the insulating protective cover prevents the data communication cable and the PLC cable from being exposed on the housing sidewall of the electronic wattmeter, thereby preventing the data communication cable and the PLC cable from being damaged during the electrostatic test and the voltage shock test.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a perspective view illustrating a housing structure of an electronic wattmeter according to an embodiment of the present invention. 2 is a perspective view showing an electronic power meter according to an embodiment of the present invention, FIG. 3 is a perspective view showing a housing having a form in which a data communication cable and a PLC cable are accommodated, and FIG. 4 is an electronic power meter according to an embodiment of the present invention. It is a figure which shows the external appearance of this.

Referring to FIG. 1, the electronic wattmeter includes a housing 100 and a housing cover 200.

The housing 100 has an hexahedron shape of which one surface is open and includes an inner space 140. Although not shown in the figure, the PLC cable and data communication cable used for remote meter reading are accommodated in the internal space 140, and a PCB board, a display element, and a current transformer used for measuring electric power may be accommodated.

In addition, the housing 100 includes a first through hole 110, a second through hole 120, a U-shaped support part 130, and a plurality of screw fastening grooves 151, 152, 153, 154, and 155. The terminal groove 160 and the wire insertion hole 170 is included.

The first through hole 110 is formed on one sidewall of the housing 100, and a connector included in the data communication cable is seated.

The U-shaped support 130 is spaced apart from the first through hole 110 at a position facing the first through hole 110 in the internal space 140 of the housing 100. In this case, the U-shaped support portion 130 is a connector of the data communication cable, the U-shaped support portion 130 is to support the connector of the data communication cable.

The second through hole 120 is formed below the first through hole 110 in the housing 100 to seat the connector of the PLC cable. The structure in which the data communication cable is seated in the first through hole 110, the structure in which the PLC cable is seated in the second through hole 120, and an insulating protective cover for protecting each cable will be described in detail with reference to FIGS. 2 and 3. .

The wire insertion hole 170 is formed in the lower bottom surface of the housing 100, and the output wire and the input wire are penetrated, and the output wire and the input wire penetrated through the wire insertion hole 170 are respectively input / output. It is connected to the output terminal groove 160.

Meanwhile, the plurality of screw fastening grooves 151, 152, 153, 154, and 155 are grooves where the screws are tightened, and the housing cover 200 may be screwed on the open area of the housing 100. Specifically, the housing cover 200 is placed on the open area of the housing 100, and the plurality of screw through holes 211, 212, 213, 214, and 215 included in the housing cover 200 are fastened to the plurality of screws. The housing 100 may be closed by tightening screws into the grooves 151, 152, 153, 154 and 155. To this end, a plurality of screw fastening grooves 151, 152, 153, 154, and 155 included in the housing 100 and a plurality of screw through holes 211, 212, 213, 214, and 215 included in the housing cover 200. ) Should be formed in a position that matches each other.

2 is a perspective view illustrating an electronic power meter according to an embodiment of the present invention. Referring to FIG. 2, the electronic power meter includes a housing 100, a data communication cable 300 accommodated in the internal space 140 of the housing 100, a PLC cable 400, and an insulation protection cover 500.

The data communication cable 300 is seated in the first through hole 110 included in the housing 100, and is supported on the U-shaped support 130. In detail, the data communication cable 300 includes a connector 310, a cable wire 330, and a nut screw 320.

The data communication cable 300 is for data communication by performing RF communication, 485 communication, modem communication, etc. with a terminal (or server) located remotely, and includes a connector 310 physically connected to a telephone line or an external cable line. . The connector 310 is placed on the U-shaped support portion 130 in the internal space 140 of the housing 100 and forcedly pressed in the direction of the first through hole 110. 310 may be seated.

The connector 310 includes a locking protrusion 311 formed to protrude outward along the outer circumferential surface of the body. The locking protrusion 311 has a diameter larger than the diameter of the outer surface of the connector 310, has a diameter larger than the diameter of the first through hole 110, and has a diameter larger than an inner gap of the U-shaped support 130.

In the state where the connector 310 is seated in the first through hole 110, the locking protrusion 311 is positioned in a spaced space between the first through hole 110 and the U-shaped support 130. Accordingly, the locking protrusion 311 is caught by the U-shaped support 130 and prevents the connector 310 from falling out of the first through hole 110.

On the other hand, the nut screw 320 is fitted to the outer peripheral surface of the body of the connector 310 is screwed to the U-shaped support portion 130. A screw pattern is formed on the outer circumferential surface of the body of the connector 310, and screwing is possible by turning the nut screw 320 in one direction. As the nut screw 320 is screwed to the U-shaped support 130, the nut screw 320 faces the locking protrusion 311 with the U-shaped support 130 interposed therebetween, and the locking protrusion 311. The connector 310 can be fixed together.

If the screw is not tightened by using the nut screw 320, the connector 310 may be moved in the spaced space between the first through hole 110 and the U-shaped support part 130, resulting in poor connection. . Therefore, by screwing using the nut screw 320 in a state where the locking protrusion 311 is hung on the U-shaped support 130, the connector 310 can be fixed so as not to move.

Meanwhile, the PLC cable 400 is seated in the second through hole 120 included in the housing 100. Specifically, the PCL cable 400 includes a connector 410 and a cable line 420.

The PLC cable 400 is for power communication with a remotely located terminal (or server), and includes a connector 410 that is physically connected to a telephone line or an external cable line. When the connector 410 is forcibly pressed in the direction of the second through hole 120 from the outside of the housing 100, the connector 410 may be seated in the second through hole 120.

The connector 410 of the PLC cable 400 includes a head 411, a square body 412, and a locking member 413. The head 411 has a diameter larger than that of the second through hole 120. When the connector 410 is forced into the second through hole 120 from the outside of the housing 100, the second through hole ( It will surround the edge of 120. Therefore, the head 411 is caught by the outer edge of the second through hole 120 and does not pass through the second through hole 120.

The quadrangular body 412 is connected to the head 411 and passes through the second through hole 120. In this case, when the quadrangular body 412 passes through the second through hole 120 and the head 411 is caught on the outer edge of the second through hole 120, the square body 412 passes through the second through hole 120. The body 412 is movable. Therefore, the locking member 413 is formed on both sides of the rectangular body 412 for this purpose.

The locking member 413 is elastic and protrudes on both sides of the rectangular body 412 and is connected to both rear ends of the rectangular body 412 and faces in the shear direction to which the head 411 is connected. At this time, the locking member 413 is slightly apart from both sides of the rectangular body 412 except for portions connected to both rear ends of the rectangular body 412. Therefore, when the rectangular body 412 passes through the second through hole 120, the engaging member 413 having elasticity comes in contact with both sides of the rectangular body 412 to easily enter. To this end, the second through hole 120 has the same shape and size as the rectangular body 412, but has a groove through which the locking member 413 passes through a portion through which both sides of the rectangular body 412 pass. At this time, the groove has a size that can be barely pushed in if the locking member 413 is forcibly pressed in a state in contact with both sides of the rectangular body 412. Therefore, when the rectangular body 412 is completely passed through the second through hole 120 and seated, when the locking member 413 is returned to its original state by elasticity and slightly dropped from both sides of the rectangular body 412. It is caught by the second through hole 120 can be fixed to the square body 412.

As described above, the data communication cable 300 and the PLC cable 400 may be accommodated in the internal space 140 of the housing 100, and this structure can be confirmed through FIG. 3.

Referring to FIG. 3, the connector 310 of the data communication cable 300 is seated in the first through hole 110. The nut screw 320 is tightened together with the locking protrusion 311 with the U-shaped support 130 interposed so that the connector 310 does not move.

In addition, the connector 410 of the PLC cable 400 is seated in the second through hole 120. In addition, the locking member 413 is caught by the second through hole 120 in a state where the rectangular body 412 passes through the second through hole 120 to fix the connector 410.

On the other hand, the electronic electricity meter includes an insulation protection cover 500 that is fitted to the first through hole 110 and the second through hole 120 from the outside of the housing 100. The insulating protective cover 500 is connected to the first cover portion 510 fitted to the circular first through hole 110 and the second cover portion 520 fitted to the second through hole 120 in a square shape. Done in one. And, made of a rubber material having flexibility and elasticity, it is easy to fit in the first through hole 110 and the second through hole 120. As such, the appearance of the electronic wattmeter in the state where the insulating protective cover 500 is fitted is shown in FIG. 4.

The data communication cable 300 and the PLC cable 400 seated in each of the first through hole 110 and the second through hole 120 are exposed, and the first through hole 110 and the second through hole ( The insulation protection cover 500 is inserted into the 120 to prevent exposure of the data communication cable 300 and the PLC cable 400. Therefore, when performing an electrostatic test and a voltage shock test on the electronic electricity meter, the data protection cable 300 and the PLC cable 400 are insulated by the insulation protection cover 500 so as to prevent damage caused by high voltage. do.

In addition, when the communication function is not used in the electronic electricity meter, the insulation protection cover 500 may be left as it is to prevent an electric shock accident by the data communication cable 300 and the PLC cable 400 at normal times, and to protect from the external environment. It is possible to prevent contamination and breakage.

When the electronic power meter does not use the communication function, the insulation protection cover 500 is separated from the first through hole 110 and the second through hole 120, so that the data communication cable 300 and the PLC cable 400 are used. You can connect a communication line.

In the above described and illustrated with respect to the preferred embodiment of the present invention, the present invention is not limited to the specific embodiments described above, it is usually in the art to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or the prospect of the present invention.

1 is a perspective view illustrating a housing structure of an electronic wattmeter according to an embodiment of the present invention;

2 is a perspective view of an electronic wattmeter according to an embodiment of the present invention;

3 is a perspective view showing a housing in which a data communication cable and a PLC cable are accommodated;

4 is a view showing the appearance of an electronic watt-hour meter according to an embodiment of the present invention.

<Explanation of Signs of Major Parts of Drawings>

100 housing 200 housing cover

110: first through hole 120: second through hole

130: U-shaped support 300: data communication cable

310: connector of the data communication cable 311: jamming protrusion

320: nut screw 400: PLC cable

410: head 420: square body

421: locking member 500: insulation protective cover

Claims (7)

A housing including an internal space having an open hexahedron shape and accommodating a PLC cable and a data communication cable in the internal space; And A transparent housing cover screwed to an open side of the housing to close the housing, The housing, A first through hole formed on one sidewall of the housing to seat a connector included in the data communication cable; A second through hole formed below the first through hole in the housing to seat a connector of the PLC cable; A U-shaped support part spaced apart from the first through hole at a position facing the first through hole in the inner space of the housing and supporting the connector of the data communication cable; And, And an insulation protection cover inserted into the first through hole and the second through hole outside the housing to protect a connector of each of the PLC cable and the data communication cable. The method of claim 1, The insulation protective cover, Electronic power meter, characterized in that made of a rubber material having flexibility and elasticity. The method of claim 1, The connector of the data communication cable, The electronic watt-hour meter, which is placed on the U-shaped support in the inner space of the housing and forcedly pressed in the direction of the first through hole. The method of claim 3, The connector of the data communication cable, A locking protrusion formed to protrude outward along an outer circumferential surface of the body and caught by the U-shaped support; And And a nut screw inserted into an outer circumferential surface of the body and screwed to the U-shaped support to fix the connector of the data communication cable together with the engaging protrusion facing the U-shaped support therebetween. The method of claim 1, The connector of the PLC cable, The electronic watt-hour meter characterized in that it is forced to be seated in the direction of the second through-hole from the outside of the housing. The method of claim 5, The connector of the PLC cable, A head having a diameter larger than that of the second through hole and surrounding the edge of the second through hole and caught by an outer edge of the second through hole of the housing; A square body connected to the head and passing through the second through hole; And An electronic wattmeter formed on both sides of the body and including a locking member elastically protruding in a state in which the rectangular body is pushed into the second through hole to be caught in the second through hole to fix the rectangular body; . The method of claim 1, Electronic power meter, characterized in that the inner space of the housing further includes a PCB substrate, display element, current transformer.

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