KR20210026213A - Apparatus for detecting wrong wiring of single phase ac electric watt-hour meter - Google Patents

Abstract

The present invention provides a single-phase low-voltage electronic watt-hour meter, which includes: a body having a receiving space therein; a cover formed to be opened and closed with respect to the body; and a wire identification unit accommodated inside the main body and electrically connected to at least one of a power line and a neutral line of the single-phase low-voltage electronic watt-hour meter. According to the present invention, operators can more accurately fasten the cleanliness of the watt-hour meter.

Description

Miswired detection device of single-phase low-voltage electronic watt-hour meter {APPARATUS FOR DETECTING WRONG WIRING OF SINGLE PHASE AC ELECTRIC WATT-HOUR METER}

The present invention is a device for detecting mis-wiring of a single-phase low-voltage electronic watt-hour meter, and more particularly, by detecting and displaying each phase of the power line (L phase) and the neutral wire (N-phase) of the single-phase low-voltage electronic watt-hour meter, the operator The present invention relates to a device for detecting incorrect wiring of a single-phase low-voltage electronic watt-hour meter that assists to more accurately connect the clean wire of the wire.

In general, the power system is equipped with various transmission facilities to supply the power generated by the generator to the customer, and the power generated by the generator is supplied to the customer through a plurality of transmission and reception facilities installed in the middle.

In order to measure the consumption of electric power, the customer receiving power must install an watt-hour meter capable of measuring it, and the watt-hour meter is generally divided into a mechanical type and a digital type (electronic type). The current trend is mainly a digital type (electronic) watt hour meter that can acquire various information on the supplied power.

This watt-hour meter cannot measure high voltage and current that the watt-hour meter cannot allow, such as high voltage, so it must be used in combination with a transformer called MOF (Metering Out Fit) or CT (Current Transformer). Is transformed into low voltage and low current and sent to the watt-hour meter, and the watt-hour meter measures the modified low voltage and low current.

In other words, a watt-hour meter is a device that supplies electricity to the customer and can measure the amount of electricity used by the customer. It can be installed not only in general homes, but also in various buildings such as buildings or factories. It can be initiated by connecting the terminals and wires of the watt-hour meter after being attached to the inside of the building on the customer side by the supplier.

Specifically, in the related art, since the operator of the electricity supplier attaches the watt-hour meter inside the building on the receiver side and manually connects the terminal and the wire of the watt-hour meter to perform work, the neutral line (0S) of the supply side is the corresponding neutral line of the meter. Often, the overvoltage was supplied by not being properly connected to the terminal, but connected to the voltage terminals such as 1S and 2S of the watt-hour meter.

That is, when electricity is used in a state in which the terminal of the watt-hour meter and the wire are not properly connected, various problems such as fire, heat generation, burnout of the meter, and incorrect metering have occurred due to overvoltage.

In addition, since it is difficult to detect in the early stage unless the meter is damaged in the wiring state of the watt-hour meter, additional problems such as secondary fire, heat generation, burnout of the meter, and load burnout have occurred.

Therefore, by detecting and displaying the phases of each of the power line (L phase) and neutral line (N phase) of the single-phase low-voltage electronic watt-hour meter, field workers can more accurately connect the clean wire of the watt-hour meter. There is a situation in which the need for an erroneous wire detection device is gradually increasing in the art.

Therefore, the present invention was conceived to solve the above problems, and an object of the present invention is to detect and display each phase of the power line (L phase) and the neutral wire (N phase) of a single-phase low-voltage electronic watt hour meter. It is to provide an erroneous wire detection device for single-phase low-voltage electronic watt-hour meters that can more accurately connect the clean wires of the watt-hour meter.

According to a feature of the present invention for achieving the object as described above, the present invention is a device for detecting erroneous wiring of a single-phase low-voltage electronic watt-hour meter, comprising: a main body having an accommodation space therein; A cover formed to be opened and closed with respect to the main body; And a wire identification unit accommodated inside the main body and electrically connected to at least one of a power line and a neutral wire of the single-phase low-voltage electronic watt hour meter.

The wire identification unit, a PCB substrate; A detection unit mounted on the PCB substrate to detect an AC voltage of at least one of the power line and the neutral line; A conversion unit converting the AC voltage detected by the detection unit into a DC voltage; And a display unit connected to the conversion unit to receive the DC voltage and output light.

The display unit is formed of at least one LED element and is mounted on the upper surface of the PCB substrate.

In at least one area of the cover, a cover hole is formed to allow the display to penetrate through the opening and closing of the cover.

A body hole through which at least one of the power line and the neutral line is drawn in or out is formed through at least one region of the body.

It further includes a wire fixing portion protruding around the main body hole to surround and fix at least one of the power line and the neutral wire.

It further includes a wire support portion extending in the length direction from the wire fixing portion to prevent the contact of the wire.

One end is connected to the wire identification unit and the other end further includes a ground wire connected to an external ground.

At least one of the body and the cover is formed by coating with a non-combustible binder composition.

The present invention detects and displays the phases of each of the power line (L phase) and neutral line (N phase) of a single-phase low-voltage electronic watt-hour meter, thereby enabling the operator to more accurately connect the clean wire of the watt-hour meter.

In addition, the present invention can prevent the secondary spread of fire when a fire occurs in a wire or wattmeter, and has the effect of preventing safety accidents such as electric shock in advance by blocking the possibility of conduction due to random incorrect wiring in advance. have.

In addition, the present invention has the effect of solving the inconvenience of extending the electric wire that may occur when the mechanical power meter is replaced with an electronic type.

In addition, since the present invention does not require a separate power source, there is an effect of reducing consumable costs due to additional power supply, and at the same time reducing the manufacturing cost due to a simple structure of the erroneous wiring detection device.

1 is a perspective view of an apparatus 100 for detecting erroneous wiring of a single-phase low-voltage electronic watt-hour meter according to an embodiment of the present invention.
FIG. 2 is an exploded view of an apparatus 100 for detecting erroneous wiring of a single-phase low-voltage electronic watt-hour meter according to an embodiment of the present invention.
3 shows a schematic circuit diagram of the wire identification unit 130 according to an embodiment of the present invention.
4A and 4B are diagrams showing a state diagram of use in which the watt hour meter w according to an embodiment of the present invention and the erroneous wire detection device 100 of a single-phase low-voltage electronic watt hour meter are combined.
5 is a perspective view of an apparatus 100 for detecting erroneous wiring of a single-phase low-voltage electronic watt-hour meter according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating a usage state diagram in which an electronic watt hour meter w according to an embodiment of the present invention and an erroneous wire detection device 100 of a single-phase low-voltage electronic watt hour meter are combined.

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

1 and 2 are perspective views and exploded views, respectively, of an erroneous wire detection device 100 of a single-phase low-voltage electronic watt-hour meter according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the apparatus 100 for detecting erroneous wiring of a single-phase low-voltage electronic watt-hour meter according to an embodiment of the present invention includes a main body 110, a cover 120, a wire identification unit 130, and a ground wire 140. ), the wire fixing part 150 and the wire support part 160, and the like. For example, the power line (L phase) or neutral wire (N phase) of the watt hour meter is accommodated inside the main body 110 so that the power line (L phase) or the neutral wire (N phase) is electrically connected to the wire identification unit 130. By being connected, the wire identification unit 130 detects the phase of the power line (L phase) or the neutral wire (N phase) of the watt hour meter, and performs an operation to display it to the outside so that the manager can easily recognize it. do.

The main body 110 may be implemented in the form of a rectangular parallelepiped frame, and an accommodation space may be formed therein. For example, the body 110 may be made of a material such as plastic, preferably water 60% to 80%, silicon oxide 10% to 20%, sodium oxide 2% to 10% aluminum oxide 1% to 5 %, potassium oxide 0.1% to 1%, calcium oxide 0.1% to 1%, etc. are mixed and then stirred at a temperature of 200°C to 220°C for 20 hours or more and 24 hours or less to cool the waste plastic pellets. By drying through extrusion molding or hot press molding to form a rectangular parallelepiped, it is possible to protect the wire identification unit 130 and the like accommodated therein.

In addition, at least one area of the main body 110 may have a main body hole 111 through which a power line (L-phase) or a neutral wire (N-phase) of the power system is drawn in or out. In this case, the main body hole 111 has a circular shape corresponding to the diameter of the power line (L-phase) or neutral wire (N-phase) for easy withdrawal of the power line (L-phase) or neutral wire (N-phase) of the power system. It can be formed in a size, and the power line (L phase) or the neutral wire (N phase) is inserted into the body 110 through the body hole 111 and coupled to the erroneous wiring detection device 100 of the single-phase low-voltage electronic power meter. Can be.

In addition, as shown in FIG. 2, the interior accommodation space of the main body 110 according to an embodiment of the present invention may be formed in a multi-stage structure. For example, a receiving groove corresponding to the length and diameter of the electric wire is formed in the inner space of the main body 110 into which the power line (L-phase) or the neutral wire (N-phase) is introduced, and the electric wire is identified at both upper ends of the receiving groove. A mounting groove may be formed for stable mounting of the portion 130, and the receiving groove and the mounting groove may be formed at different depths from the upper end of the main body 110. That is, an accommodation space having a different shape and depth may be provided inside the main body 110 to accommodate the electric wire or the electric wire identification unit 130 of the watt-hour meter (w).

The cover 120 may be formed to be open and close with respect to the main body 110. Specifically, the cover 120 may be implemented in the form of a rectangular plate corresponding to the upper end of the main body 110, and is formed detachably from the main body 110 to accommodate the inside of the main body 110 It is possible to protect the identification unit 130 and the like.

In addition, for example, the cover 120 may be made of the same or similar material as the main body 110, and through this, it is possible to protect the erroneous wiring detection device 100 of the single-phase low-pressure electronic power meter from fire. That is, the main body 110 and/or the cover 120 may be formed by being coated with a non-flammable binder composition, and when a fire occurs in the electric wire or the watt hour meter w, the spread of fire may be prevented.

In addition, in one embodiment of the present invention, the main body 110 and the cover 120 have a plurality of coupling protrusions and coupling grooves for mutual fitting coupling on each side of the main body 110 and the cover 120 (for example, 4 Dog, etc.), and the body 110 and the cover 120 can be combined more simply and conveniently through the fitting coupling of the coupling protrusion and the coupling groove even without using a coupling tool including screws, etc. have.

The wire identification unit 130 may be accommodated inside the main body 110 and electrically connected to at least one of a power line (L-phase) and a neutral wire (N-phase) of the power meter. For example, the wire identification unit 130 outputs light so that the operator can easily distinguish it with the naked eye according to the type of wire of the watt hour meter (w) accommodated in the main body 110, or transmits light to the outside. It can be performed not to output, and through this, it is possible to more efficiently proceed with the work of fastening the cleanliness of the watt hour meter (w). This will be described in more detail below.

The wire identification unit 130 may include a PCB substrate 131, a detection unit 132, a conversion unit 133, and a display unit 134.

The PCB substrate (PCB: Printed Circuit Board, Printed Circuit Board, 131) can be made of substrate materials such as thin glass including polyethylene naphthalate (PEN), PET, and polyimide (PI), plastic film, etc. In some cases, one or two or more materials may be mixed and manufactured.

The detection unit 132 is mounted on the PCB substrate 131 to detect an AC voltage of at least one of a power line (L phase) and a neutral line (N phase). For example, the detection unit 132 may detect a voltage applied to the detection unit 132 according to the type of wire of the watt hour meter w inserted through the body hole 111, and at the same time, the detection unit 132 may detect a filter circuit. By grafting and filtering out excessive surge voltage, a more stable AC voltage can be supplied.

The conversion unit 133 is connected to the detection unit 132 to convert the AC voltage detected by the detection unit 132 into a DC voltage. For example, the conversion unit 133 may be mounted on the PCB substrate 131 to be electrically connected to the detection unit 132, and may serve to convert an AC voltage supplied from the detection unit 132 into a DC voltage. have. In this case, the conversion unit 133 may convert the DC voltage by stabilizing the waveform distortion.

The display unit 134 is connected to the conversion unit 133 to receive a DC voltage and output light. For example, the display unit 134 may be implemented as at least one LED element capable of outputting light and mounted on the upper surface of the PCB substrate 141. In this case, the cover 120 is provided in at least one area of the cover 120. In response to the size and diameter of the display unit 134 so that the display unit 134 can penetrate through the opening and closing of ), the cover hole 121 may be formed through.

More specifically, the display unit 134 may be electrically connected to the conversion unit 133 by a connection wire, and may output light by a DC voltage supplied from the conversion unit 133. For example, when the power line (L phase) or neutral wire (N phase) of the watt hour meter w is inserted into the main body 110 and electrically connected to the electric wire identification unit 130, the detection unit 132 is The AC voltage applied according to the type of wire is detected, the conversion unit 133 converts the detected AC voltage to a DC voltage and supplies it to the display unit 134, and the display unit 134 is a DC supplied from the conversion unit 133. Light can be output to the outside by using voltage.

That is, for example, when the neutral line (N phase) of the watt hour meter w is introduced into the main body 110, the AC voltage is not detected by the detection unit 132, so the display unit 134 does not output light. When the power line (L phase) of the watt hour meter w is drawn in, the AC voltage is detected by the detection unit 132 and the DC voltage is supplied through the conversion unit 133, so that the display unit 134 can output light. have. Accordingly, the operator can more easily and quickly grasp the type of wire of the watt hour meter w through whether or not the display unit 134 is turned on.

The ground wire 140 may be provided so that one end is connected to the wire identification unit 130 and the other end is connected to an external ground, through which the power line (L phase) of the watt-hour meter (w) introduced into the main body 110 is The display unit 134 is turned on by applying a voltage of 220V. Conversely, the voltage of 220V is not applied to the neutral line (N phase) of the watt hour meter w, so that the display unit 134 can be turned off.

The wire fixing part 150 is formed protruding around the body hole 111 to wrap and fix the power line (L-phase) or the neutral wire (N-phase). For example, the wire fixing part 150 has a through hole corresponding to the diameter of the power line (L-phase) or the neutral wire (N-phase) for easy withdrawal of the electric wire, and the power supplied in the direction of the main body hole 111 It covers the circumferential surface of the line (L-phase) or the neutral wire (N-phase) to protect the wire of the watt-hour meter (w) from external forces, and at the same time, it is possible to prevent the wire of the watt-hour meter (w) from being separated from the main body 110. have.

The wire support unit 160 is formed extending in the longitudinal direction from the wire fixing unit 150 to prevent the wires from coming into contact with each other. For example, the electric wire support unit 160 is one side of the main body 110 or the wire fixing unit 150 along the length of the power line (L-phase) or the neutral wire (N-phase) drawn in and out of the main body hole 111. It may be formed to extend from one end by a predetermined length, and more preferably, the wire support unit 160 may be formed to be bent in a downward direction so that the wire can be stably placed inside.

Through this, the wire support unit 160 prevents contact between the wires of the watt hour meter w or with various facilities in advance, thereby preventing safety accidents such as arcs, instrument burnout, and fire that may occur due to the contact.

3 shows a schematic circuit diagram of the wire identification unit 130 according to an embodiment of the present invention.

3, the power line (L-phase) or neutral wire (N-phase) of the watt-hour meter (w) is accommodated in the body 110 through the body hole 111, and the received power line (L-phase) or neutral wire (N phase) may be electrically connected to the wire identification unit 130.

More specifically, the detection unit 132 generates a filtered AC voltage by detecting a voltage according to the type of the wire of the connected watt hour meter w, and the conversion unit 133 converts the transmitted AC voltage to a more stable DC voltage to the display unit. It is provided to 134, and the display unit 134 may output light to the outside through an LED device or the like.

That is, for example, when the neutral line (N phase) of the watt hour meter w is introduced into the main body 110, the AC voltage is not detected by the detection unit 132, so the display unit 134 does not output light. When the power line (L phase) of the watt hour meter w is drawn in, the AC voltage is detected by the detection unit 132 and the DC voltage is supplied through the conversion unit 133, so that the display unit 134 can output light. have. Accordingly, the operator has the advantage of being able to more efficiently and quickly grasp the type of wire of the watt hour meter w through whether or not the display unit 134 is turned on.

4A and 4B are diagrams illustrating a combined use state diagram of a watt hour meter w according to an embodiment of the present invention and an erroneous wire detection device 100 of a single-phase low-voltage electronic watt hour meter.

The device for detecting incorrect wiring of a single-phase low-voltage electronic watt hour meter 100 includes a display unit 134 according to the type of wires of the power line (L-phase) and the neutral wire (N-phase) of the watt-hour meter (w) sequentially introduced through the body hole 111. Light may be output through or may be operated so that no light is output.

For example, as shown in FIGS. 4A and 4B, when the neutral line (N phase) of the watt hour meter w is drawn in, the AC voltage is not detected by the detection unit 132, so the display unit 134 outputs light. Without (for example, see Fig. 4A), on the contrary, when the power line (L phase) of the watt hour meter w is drawn in, the AC voltage is detected by the detection unit 132 and the DC voltage is reduced through the conversion unit 133. By being supplied, light can be output by the display unit 134 (see, for example, FIG. 4B). Through this, the operator can determine the type of the electric wire of the watt hour meter w according to whether the display unit 134 is turned on or not, and perform a highly reliable clean wire fastening operation.

5 and 6 show a perspective view and a state diagram of use, respectively, of an erroneous wire detection device 100 of a single-phase low-voltage electronic watt-hour meter according to an embodiment of the present invention.

5 and 6, the erroneous wiring detection device 100 of a single-phase low-voltage electronic watt-hour meter may be installed so that a plurality (for example, two) may be in contact with each other, through which the power line of the watt-hour meter (w) ( L-phase) and neutral (N-phase) phases can be simultaneously detected and displayed to the outside.

In order to implement this, the erroneous wiring detection devices 100 of a plurality (for example, two) of a single-phase low-voltage electronic watt-hour meter may be arranged and combined in a row (for example, see FIG. 5), and a body hole ( 111) is characterized in that the power line (L-phase) and neutral wire (N-phase) of the watt-hour meter (w) are each inserted so that the type of the wire of the watt-hour meter (w) can be identified at the same time.

That is, as shown in FIG. 6, the erroneous connection detection device 100 of the single-phase low-voltage electronic watt hour meter to which the neutral line (N phase) of the watt-hour meter w is coupled is not detected by the detection unit 132, so the display unit ( 134 does not output light, and at the same time, the power line (L phase) of the watt-hour meter w is coupled to the erroneous wire detection device 100 of the single-phase low-voltage electronic watt-hour meter, and the AC voltage is detected by the detection unit 132 and the conversion unit By supplying a DC voltage through 133, light may be output by the display unit 134.

That is, by simultaneously performing detection of the power line (L phase) and the neutral wire (N phase) of the watt hour meter (w) through the erroneous wire detection device 100 of a plurality (for example, two) single-phase low-voltage electronic watt-hour meters. , There is an effect of improving the reliability and efficiency of the tightening of the watt-hour meter (w).

The present invention has been disclosed in the drawings and in the specification, the best embodiments. Here, specific terms have been used, but these are only used for the purpose of describing the present invention and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, the present invention will be understood by those of ordinary skill in the art that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical idea of the appended claims.

100: Miswired detection device of single-phase low-voltage electronic watt-hour meter
110: main body 111: main body hole
120: cover 121: cover hole
130: wire identification unit 131: PCB board
132: detection unit 133: conversion unit
134: display unit 140: ground wire
150: wire fixing part 160: wire support part

Claims (9)

As a device for detecting mis-wiring of a single-phase low-voltage electronic watt-hour meter,
A main body having an accommodation space therein;
A cover formed to be opened and closed with respect to the main body; And
Mis-wiring detection device of a single-phase low-voltage electronic watt-hour meter including a wire identification unit accommodated inside the main body and electrically connected to at least one of a power line and a neutral wire of the single-phase low-voltage electronic watt-hour meter. The method of claim 1,
The wire identification unit,
PCB substrate;
A detection unit mounted on the PCB substrate to detect an AC voltage of at least one of the power line and the neutral line;
A conversion unit converting the AC voltage detected by the detection unit into a DC voltage; And
A display unit connected to the conversion unit to receive the DC voltage and output light,
Mis-wiring detection device of single-phase low-voltage electronic watt-hour meter. The method of claim 2,
The display unit is formed of at least one LED element and is mounted on an upper surface of the PCB substrate. The method of claim 3,
In at least one area of the cover, a cover hole is formed to allow the display to penetrate through opening and closing of the cover. The method of claim 1,
In at least one area of the main body, a body hole for introducing or drawing at least one of the power line and the neutral wire is formed through. The method of claim 5,
A wire fixing unit protruding around the main body hole to wrap and fix at least one of the power line and the neutral wire. The method of claim 6,
An erroneous connection detection device of a single-phase low-voltage electronic watt-hour meter, further comprising a wire support part extending from the wire fixing part in a longitudinal direction to prevent the wires from being mixed. The method of claim 1,
One end is connected to the wire identification unit, and the other end is connected to the external ground and further comprising a ground wire, single-phase low-voltage electronic watt-hour meter erroneous wire detection device. The method of claim 1,
At least one of the main body and the cover is formed by coating with a non-combustible binder composition.

Images