KR20200065491A - Apparatus and method for diagnosing wrong connection of metering out fit - Google Patents

Abstract

The present invention discloses a metering out fit (MOF) incorrect connection diagnosis device and a method thereof. The MOF incorrect connection diagnosis device of the present invention comprises: a meter mounting unit provided on a terminal block of a watt-hour meter, corresponding to each terminal through a plurality of first terminals, and outputting a predetermined diagnosis signal; an MOF mounting unit provided on a terminal block of the MOF including a meter current transformer (CT) and a meter transformer (PT), providing a plurality of second terminals respectively corresponding to the plurality of first terminals of the meter mounting unit, and outputting a response signal by responding to a diagnosis signal when a diagnosis signal is received through any one of the plurality of second terminals; and a control unit diagnosing whether an incorrect connection between the watt-hour meter and the MOF exists based on the diagnosis signal and the response signal therefor.

Description

MOF misconnection diagnosis device and method{APPARATUS AND METHOD FOR DIAGNOSING WRONG CONNECTION OF METERING OUT FIT}

The present invention relates to an apparatus and method for diagnosing incorrect wiring of MOF, and more particularly, to an apparatus and method for diagnosing incorrect wiring of MOF for diagnosing incorrect wiring of MOF and special high-voltage electronic meters in a special high-voltage power receiving facility.

In general, an instrument transformer (Metering Out Fit, MOF) is a device that transforms into a voltage and current proportional to the input voltage and current. The instrument transformer (MOF) includes a primary terminal unit to which voltage and current are input, and a secondary terminal unit to which the modified voltage and current is output. The secondary terminal part is connected to a watt-hour meter for measuring voltage and current output from an instrument transformer (MOF).

The watt-hour meter is provided with a plurality of voltage terminals, a plurality of current terminals, and a plurality of ground terminals of a three-phase power supply, and a plurality of voltage terminals, a plurality of current terminals, and a plurality of ground terminals are also provided in the secondary terminal unit, and the terminals of the watt-hour meter The terminals of the secondary terminal portion and the secondary terminals are connected to each other and connected.

In addition, an instrument transformer (MOF) is very dangerous when high voltage and large current are directly connected to an instrument or relay in a switchboard, so low voltage (for example, 110V) proportional to voltage and current, small current (for example, 5A, It is a device for changing to 1A or 0.1A) and using it as an input current such as a power meter and watt-hour meter or measuring instrument.

If the connection between the meter transformer (MOF) and the electricity meter is incorrect, normal phase metering cannot be performed because the phase shift between the voltage and the current occurs, and the abnormal metering accumulates incorrect wiring compared to the normal wiring depending on the degree of load and the power factor of the load. Since the proportions fluctuate all the time, it is impossible to deduce the normal weighing value.

Since the watt-hour meter cannot accommodate a high voltage, it is possible to perform a normal metering by receiving a power denatured with an acceptable voltage in connection with an instrument transformer (MOF). Therefore, in general, a watt-hour meter installed to supply stable power is used in connection with a meter transformer (MOF).

That is, in the distribution high-voltage power receiving facility, a transformer for instrument (MOF), a special high-voltage electronic meter, and the like are installed. Accordingly, there is a problem in that the weighing loss amount of the high-pressure customer increases rapidly, and the accumulated loss amount increases.

As a background technology of the present invention, the Republic of Korea Registered Patent Publication No. 10-1801611 (announcement date: November 27, 2017), "Special high pressure instrument transformer (MOF) current ratio and error range adequacy verification information technology (IT) system" There is this.

According to an aspect of the present invention, the present invention was devised to improve the above problems, and provides an apparatus and method for diagnosing incorrect wiring of MOF for diagnosing incorrect connections between the MOF and the special high-voltage electronic meter in a special high-voltage power receiving facility. It aims to do.

MOF misconnection diagnosis apparatus according to an aspect of the present invention, is provided on the terminal block of the watt-hour meter, an instrumentation unit for outputting a preset diagnostic signal corresponding to each terminal through a plurality of first terminals; It is provided on a terminal block of a metering out fit (MOF) including a meter current transformer (CT) and a meter transformer (PT), and a plurality of second terminals respectively corresponding to a plurality of the first terminals of the meter mounting unit, , MOF mounting unit for outputting a response signal in response to the diagnostic signal when the diagnostic signal is received through any one of the plurality of second terminals; And a control unit configured to diagnose whether there is an incorrect connection between the power meter and the MOF based on the diagnostic signal and the response signal thereto.

In the present invention, the control unit, if the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of first terminals, diagnoses the connection to the terminal as normal, otherwise or no If the response signal is not output, it is characterized by diagnosing by incorrect wiring.

In the present invention, the meter mounting unit, characterized in that it comprises a; display unit for indicating whether or not the wrong connection between the power meter and the MOF.

In the present invention, the meter mounting unit, sequentially or simultaneously outputs a preset diagnostic signal corresponding to each terminal through the plurality of first terminals to transmit a signal to the MOF mounting unit, the MOF mounting unit, the plurality When the diagnostic signals are sequentially or simultaneously received through two second terminals, a response signal is output in response to the diagnostic signals sequentially or simultaneously.

In the present invention, the instrumentation unit is provided with a first transmission and reception unit, and the MOF housing unit is provided with a second transmission and reception unit, characterized in that for transmitting and receiving signals to each other.

The MOF misconnection diagnosis apparatus according to another aspect of the present invention is provided on a terminal block of a metering out fit (MOF) including an instrument current transformer (CT) and an instrument transformer (PT), and is provided through a plurality of second terminals. MOF mounting unit for outputting a preset diagnostic signal corresponding to the terminal; It is provided on the terminal block of the watt-hour meter, and has a plurality of first terminals respectively corresponding to the plurality of second terminals of the MOF mounting unit, and when the diagnostic signal is received through any one of the plurality of first terminals, the diagnostic signal An instrument unit for outputting a response signal in response to; And a control unit configured to diagnose whether there is an incorrect connection between the power meter and the MOF based on the diagnostic signal and the response signal thereto.

In the present invention, the control unit, if the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of second terminals, diagnoses the connection to the corresponding terminal as normal, or otherwise If the response signal is not output, it is characterized by diagnosing by incorrect wiring.

In the present invention, the MOF mounting unit transmits a signal to the meter mounting unit by sequentially or simultaneously outputting a preset diagnostic signal corresponding to each terminal through the plurality of second terminals, and the meter mounting unit comprises the plurality of When the diagnostic signals are sequentially or simultaneously received through the first terminals of the dog, a response signal is output in response to the diagnostic signals sequentially or simultaneously.

In accordance with an aspect of the present invention, a method for diagnosing incorrect wiring of a MOF includes: outputting a preset diagnostic signal corresponding to each terminal through a plurality of first terminals; Outputting a response signal in response to the diagnosis signal when the diagnosis signal is received through any one of a plurality of second terminals corresponding to the plurality of first terminals of the instrumentation unit; And a control unit diagnosing whether or not there is an incorrect connection between the watt hour meter and the MOF based on the diagnostic signal and the response signal thereto, wherein the meter mounting unit is provided on the terminal block of the watt hour meter, and the MOF mounting unit is a current transformer for the meter. It is characterized in that it is provided on the terminal block of the MOF (Metering Out Fit) including the (CT) and the transformer for the instrument (PT).

In the step of diagnosing the incorrect connection of the present invention, the control unit, if the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of first terminals, connects to the corresponding terminal Is diagnosed as normal, and if no response signal is outputted, it is diagnosed as an incorrect connection.

In the present invention, the meter mounting unit, sequentially or simultaneously outputs a preset diagnostic signal corresponding to each terminal through the plurality of first terminals to transmit a signal to the MOF mounting unit, the MOF mounting unit, the plurality When the diagnostic signals are sequentially or simultaneously received through two second terminals, a response signal is output in response to the diagnostic signals sequentially or simultaneously.

According to another aspect of the present invention, a method for diagnosing incorrect wiring of a MOF includes: outputting a preset diagnostic signal corresponding to each terminal through a plurality of second terminals by the MOF mounting unit; Outputting a response signal in response to the diagnostic signal when the instrument receiving unit receives the diagnostic signal through any one of a plurality of first terminals respectively corresponding to the plurality of second terminals of the MOF mounting unit; And a control unit diagnosing whether or not there is an incorrect connection between the watt hour meter and the MOF based on the diagnostic signal and the response signal thereto, wherein the meter mounting unit is provided on the terminal block of the watt hour meter, and the MOF mounting unit is a current transformer for the meter. It is characterized in that it is provided on the terminal block of the MOF (Metering Out Fit) including the (CT) and the transformer for the instrument (PT).

In the step of diagnosing the incorrect connection of the present invention, the control unit, if the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of second terminals, connects to the corresponding terminal Is diagnosed as normal, and if no response signal is outputted, it is diagnosed as an incorrect connection.

In the present invention, the MOF mounting unit transmits a signal to the meter mounting unit by sequentially or simultaneously outputting a preset diagnostic signal corresponding to each terminal through the plurality of second terminals, and the meter mounting unit comprises the plurality of When the diagnostic signals are sequentially or simultaneously received through the first terminals of the dog, a response signal is output in response to the diagnostic signals sequentially or simultaneously.

The MOF misconnection diagnosis apparatus and method according to an embodiment of the present invention minimizes electricity charge loss through prevention and early detection of misconnection of the meter by diagnosing the misconnection of the MOF and the special high voltage electronic meter in the special high voltage power receiving facility, , It has the effect of preventing human and property damage due to the opening of the MOF's current terminal.

1 is a block diagram showing a MOF misconnection diagnosis apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating a method for diagnosing an incorrect MOF according to an embodiment of the present invention.
3 is an exemplary view for explaining a MOF misconnection diagnosis apparatus and method according to an embodiment of the present invention.

Hereinafter, an apparatus and method for diagnosing an incorrect MOF according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition of these terms should be made based on the contents throughout the specification.

1 is a block diagram showing an MOF misconnection diagnosis apparatus according to an embodiment of the present invention, and FIG. 3 is an exemplary view for explaining a MOF misconnection diagnosis apparatus and method according to an embodiment of the present invention. Referring to the MOF misconnection diagnosis device with reference to the following.

First, the present embodiment, as shown in Figure 3, relates to a device for diagnosing incorrect connections of a plurality of wires connected between a watt hour meter and a metering out fit (MOF), a watt hour meter and a test terminal block (Terminal Test Block, TTB) ), and there are terminals to connect 7 or more wires to the MOF, and each terminal has 1S (yellow), P1 (red), 2S (brown), P2 (white), 3S (black), and P3 (blue). And P0 (green). That is, in this embodiment, a description will be given for checking whether the wiring is normal or abnormal between the watt-hour meter, the test terminal block, and the MOF.

As shown in FIG. 1, the MOF misconnection diagnosis apparatus according to an embodiment of the present invention includes an instrument mounting unit 10, a control unit 20, and a MOF mounting unit 30.

The meter mounting unit 10 includes a first transmission/reception unit 12 and a display unit 14, and is provided in a terminal block of a power meter (which may be a special high-voltage electronic meter), as shown in FIG. 3. At this time, the meter mounting unit 10 can be mounted on the terminal block of the watt-hour meter through a fixing screw, but the mounting method and structure are not specifically limited.

Then, the instrument mounting unit 10 outputs a preset diagnostic signal corresponding to each terminal through a plurality of first terminals. That is, the instrument mounting unit 10 may output a preset diagnostic signal simultaneously or sequentially in response to each terminal through a plurality of first terminals, wherein the preset diagnostic signal can distinguish a plurality of first terminals. It can be set to a specific voltage. In addition, the first terminal may mean a specific terminal (1S, P1, 2S, P2, etc.) provided in the instrumentation unit 10.

More specifically, the instrumentation unit 10 detects whether a signal sent from a specific terminal (1S, P1, 2S, P2, etc.) returns through the MOF unit 30 and determines whether the connection is normal or abnormal. Make it possible to diagnose. At this time, the meter mounting unit 10 may output a signal (waveform, etc.) of a specific voltage that can be sequentially distinguished to the electric wire, including the first transmission/reception unit 12. In addition, the meter mounting unit 10 includes the first transmission/reception unit 12, and not only sequentially but also simultaneously outputs a specific voltage distinguishable to at least one of a plurality of terminals. The MOF mounting unit 30 ).

In addition, the instrumentation unit 10 may include a display unit 14 to indicate whether the connection between the watt-hour meter and the MOF is normal/abnormal. At this time, the display unit 14 displays whether or not a plurality of terminals are incorrectly connected between the wattmeter and the MOF, so that the user can intuitively check whether the wiring is incorrect. In this embodiment, the display unit 14 is configured to include an LED module, but is not limited thereto.

MOF mounting unit 30 includes a second transmission and reception unit 32 and the voltage application unit 34, as shown in Figure 3, the instrument current transformer (CT) and the MOF including the transformer transformer (PT) It is provided on the terminal block of (Metering Out Fit). At this time, the MOF mounting unit 30 can be mounted on the terminal block of the MOF through a fixing screw, but the mounting method and structure are not specifically limited.

In addition, the MOF mounting unit 30 includes a plurality of second terminals respectively corresponding to a plurality of first terminals of the instrument mounting unit 10, and the diagnostic signal is transmitted through any one of the plurality of second terminals. When received, a response signal is output in response to the diagnostic signal. That is, the MOF mounting unit 30 may recognize the diagnostic signal received from the meter mounting unit 10 and output a response signal thereto. Here, the second terminal may mean a specific terminal (1S, P1, 2S, P2, etc.) provided in the MOF mounting unit 30.

More specifically, when the diagnostic signal is received through any one of a plurality of second terminals corresponding to the plurality of first terminals of the MOF mounting unit 30, the instrument mounting unit 10, the voltage applying unit 34 Through the recognition of the diagnostic signal, a specific voltage (signal, waveform, etc.) corresponding to the corresponding terminal (1S, P1, 2S, P2, etc.) can be applied, and the corresponding terminal through the second transmission/reception unit 32 It can output a response signal for a specific voltage. Here, the voltage applying unit 34 may be configured as a sequential voltage applying switch, but is not limited thereto.

That is, when the instrument mounting unit 10 sequentially or simultaneously outputs a preset diagnostic signal corresponding to each terminal through a plurality of first terminals, the MOF mounting unit 30 receives the instrument mounting unit 10 The diagnostic signal may be sequentially or simultaneously recognized through the voltage applying unit 34 to sequentially or simultaneously apply a specific voltage corresponding to the corresponding terminal. In other words, when the diagnostic signals are sequentially or simultaneously received through the plurality of second terminals, the MOF mounting unit 30 may sequentially or simultaneously respond to the diagnostic signals to output a response signal.

Referring to Figure 3, looking in more detail about the incorrect connection diagnosis, the instrument mounting unit 10 and the MOF mounting unit 30, the first transmitting and receiving unit 12 and the second transmitting and receiving unit 32, respectively, built-in The first transmission/reception unit 12 and the second transmission/reception unit 32 transmit a diagnostic signal, and have a function of distinguishing a response signal to the diagnostic signal.

Meanwhile, the first transmission/reception unit 12 and the second transmission/reception unit 32 may include a function of transmitting/receiving and determining a 4-bit binary signal. That is, each terminal of the instrumentation unit 10 transmits a specific binary signal. For example, it may be 1S(1), P1(2), 2S(3), P2(4), 3S(5), P3(6) and P0(7). However, in the present embodiment, although the first transmission/reception unit 12 and the second transmission/reception unit 32 transmit and receive a 4-bit binary signal, the present invention is not limited thereto, and may be implemented in 4 bits, 8 bits, and the like. have.

And each terminal of the MOF mounting unit 30 also sends a specific binary signal. For example, it may be 1S(8), P1(9), 2S(10), P2(11), 3S(12), P3(13) and P0(14).

That is, when signal 1 is sent from the 1S terminal of the meter mounting unit 10 to the MOF mounting unit 30, the signal 1 is received from the 1S terminal of the MOF mounting unit 30, and the meter mounting unit 10 The signal 8 is sent. The 1S terminal of the meter mounting unit 10 may be determined to be normal if the return signal is 8, and may be determined as a wrong connection if a signal other than 8 is returned or the signal is not returned.

In addition, when the signal No. 2 is sent from the P1 terminal of the meter mounting unit 10 to the MOF mounting unit 30, a signal of 2 is received from the P1 terminal of the MOF mounting unit 30 and 9 is transmitted to the meter mounting unit 10. Signal. The P1 terminal of the meter mounting unit 10 may be determined to be normal if the return signal is 9, and may be determined as a wrong connection if a signal other than 9 is returned or the signal is not returned.

That is, the control unit 20 may diagnose whether or not there is an incorrect connection between the wattmeter and the MOF based on the diagnostic signal of the meter mounting unit 10 and the response signal of the MOF mounting unit 30. In addition, if the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of first terminals, the control unit 20 diagnoses the connection to the corresponding terminal as normal, otherwise or no response signal If it is not output, it can be diagnosed as an incorrect connection.

However, in the present embodiment, the control unit 20 is separately configured to diagnose incorrect wiring, but the instrument housing unit 10 itself recognizes a response signal returned from the MOF housing unit 30 to diagnose the incorrect wiring. Can be.

In addition, in the present embodiment, the signals from 1 to 7 are sequentially or simultaneously sent from the meter mounting unit 10 to the MOF mounting unit 30 in the same manner as described above, and the MOF mounting unit 30 terminals If the signal coming back through is the correct signal from 8 to 14, it is judged as a normal connection.If the order of signals is changed or the signal does not return, it is possible to judge the incorrect connection and display the abnormality through the display unit 14. have.

On the other hand, in the present embodiment, although the display unit 14 is described as being provided in the instrument housing unit 10, the location and implementation method are not specifically limited, and may be provided in the MOF housing unit 30, The display unit 14 may be provided at a separate location.

Further, in the present embodiment, the instrumentation unit 10 transmits a signal, and the MOF unit 30 receives a signal, but the transmission and reception of the signal may be changed. That is, the initial diagnosis signal is sent from the MOF mounting unit 30, and it may be determined whether the wiring is abnormal with the response signal returned from the meter mounting unit 10 to the MOF mounting unit 30 through the power meter terminal block.

In other words, in the present embodiment, when the MOF mounting unit 30 outputs a diagnostic signal and the instrument mounting unit 10 responds to a response signal, the MOF mounting unit 30 is connected to each terminal through a plurality of second terminals. In response, a preset diagnostic signal may be output.

The instrumentation unit 10 may output a response signal in response to the diagnostic signal when the diagnostic signal is received through any one of a plurality of first terminals corresponding to the plurality of second terminals.

In addition, the MOF mounting unit 30 transmits a diagnostic signal to the meter mounting unit 10 by sequentially or simultaneously outputting a preset diagnostic signal corresponding to each terminal through the plurality of second terminals, and the meter mounting unit In step 10, when the diagnostic signals are sequentially or simultaneously received through the plurality of first terminals, a response signal may be output in response to the diagnostic signals sequentially or simultaneously.

At this time, the control unit 20 may diagnose whether there is an incorrect connection between the power meter and the MOF based on the diagnostic signal and the response signal thereto. That is, if the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of second terminals, the control unit 20 diagnoses the connection to the corresponding terminal as normal, otherwise or no response If no signal is output, it can be diagnosed as an incorrect connection.

2 is a flowchart for explaining a method for diagnosing an incorrect MOF according to an embodiment of the present invention.

As shown in FIG. 2, in the MOF misconnection diagnosis method according to an embodiment of the present invention, first, the instrumentation unit 10 outputs a preset diagnostic signal corresponding to each terminal through a plurality of first terminals. (S10).

In this embodiment, the instrumentation unit 10 can transmit and receive a 4-bit binary signal, that is, each terminal of the instrumentation unit 10 can send a specific binary signal. For example, it may be 1S(1), P1(2), 2S(3), P2(4), 3S(5), P3(6) and P0(7).

Next, when the MOF mounting unit 30 receives the diagnostic signal through any one of a plurality of second terminals respectively corresponding to the plurality of first terminals of the instrument mounting unit 10, in response to the diagnostic signal The response signal is output (S20).

In this embodiment, the MOF station 30 can also transmit and receive a 4-bit binary signal, that is, a specific binary signal can also be sent from each terminal. For example, it may be 1S(8), P1(9), 2S(10), P2(11), 3S(12), P3(13) and P0(14).

That is, when signal 1 is sent from the 1S terminal of the meter mounting unit 10 to the MOF mounting unit 30, the signal 1 is received from the 1S terminal of the MOF mounting unit 30, and the meter mounting unit 10 You can send a signal of 8. In addition, when the signal No. 2 is sent from the P1 terminal of the meter mounting unit 10 to the MOF mounting unit 30, a signal of 2 is received from the P1 terminal of the MOF mounting unit 30 and 9 is transmitted to the meter mounting unit 10. Can send a signal. This can be done sequentially from 1 to 7 or simultaneously.

Next, the control unit 20 diagnoses whether there is an incorrect connection between the power meter and the MOF based on the diagnostic signal and the response signal thereto (S30).

At this time, in step S30, if the normal diagnosis condition of the connection between the wattmeter and the MOF is satisfied, the controller 20 diagnoses the final connection state as normal (S40), and if the normal diagnostic condition is not satisfied, the connection state It can be diagnosed as the final misconnection (S50).

More specifically, the instrumentation unit 10 detects a response signal from a diagnostic signal sent from a specific terminal (1S, P1, 2S, P2, etc.) through the MOF unit 30 and detects normal or abnormal wiring. Make it possible to diagnose. At this time, the meter mounting unit 10 may output a signal (waveform, etc.) of a specific voltage that can be sequentially distinguished to the electric wire, including the first transmission/reception unit 12. In addition, the meter mounting unit 10 includes the first transmission/reception unit 12, and not only sequentially but also simultaneously outputs a specific voltage distinguishable to at least one of a plurality of terminals. The MOF mounting unit 30 ).

When the diagnostic signal is received through any one of a plurality of second terminals corresponding to a plurality of first terminals of the instrument mounting unit 10, the MOF mounting unit 30 receives the diagnostic signal through the voltage applying unit 34. By recognizing, a specific voltage corresponding to a corresponding terminal (1S, P1, 2S, P2, etc.) may be applied, and a response signal for a specific voltage corresponding to the corresponding terminal may be output through the second transmission/reception unit 32. Can be.

In addition, if the instrument mounting unit 10 sequentially or simultaneously outputs a preset diagnostic signal corresponding to each terminal through a plurality of first terminals, the MOF mounting unit 30 receives the instrument mounting unit 10 The diagnostic signal may be sequentially or simultaneously recognized through the voltage applying unit 34 to sequentially or simultaneously apply a specific voltage corresponding to the corresponding terminal. In other words, when the diagnostic signals are sequentially or simultaneously received through the plurality of second terminals, the MOF mounting unit 30 may sequentially or simultaneously respond to the diagnostic signals to output a response signal.

As described above, when signal 1 is sent from the 1S terminal of the meter mounting unit 10 to the MOF mounting unit 30, a signal of 1 is received from the 1S terminal of the MOF mounting unit 30, and the meter mounting unit ( The signal 8 is sent to 10), and the 1S terminal of the meter mounting unit 10 judges as normal if the return signal is a signal of 8, and if a signal other than 8 is returned or the signal does not return, it is connected to the wrong connection. I can judge.

In addition, when the signal No. 2 is sent from the P1 terminal of the meter mounting unit 10 to the MOF mounting unit 30, a signal of 2 is received from the P1 terminal of the MOF mounting unit 30, and 9 is input to the meter mounting unit 10. The signal is sent, and the P1 terminal of the meter mounting unit 10 may determine that it is normal if the return signal is 9, and if a signal other than 9 is returned or the signal is not returned, it may be determined as a wrong connection.

That is, the control unit 20 may diagnose whether or not there is an incorrect connection between the wattmeter and the MOF based on the diagnostic signal of the meter mounting unit 10 and the response signal of the MOF mounting unit 30. In addition, if the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of first terminals, the control unit 20 diagnoses the connection to the corresponding terminal as normal, otherwise or no response signal If it is not output, it can be diagnosed as an incorrect connection.

As described above, the MOF misconnection diagnosis apparatus and method according to an embodiment of the present invention diagnoses the misconnection of the MOF and the extra high voltage electronic meter in the special high-voltage power receiving facility, thereby preventing electricity from incorrect connection and early detection of the meter. It has the effect of minimizing toll loss and preventing human and property damage due to the opening of the MOF's current terminal.

The present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art belongs can various modifications and equivalent other embodiments from this. Will understand.

Therefore, the true technical protection scope of the present invention should be defined by the claims below.

10: Instrumentation Department
12: 1st Transceiver
14: display unit
20: control unit
30: MOF (Metering Out Fit)
32: second transmitter and receiver
34: voltage application part

Claims (14)

It is provided on the terminal block of the watt-hour meter, an instrument mounting unit for outputting a preset diagnostic signal corresponding to each terminal through a plurality of first terminals;
It is provided on a terminal block of a metering out fit (MOF) including a meter current transformer (CT) and a meter transformer (PT), and a plurality of second terminals respectively corresponding to a plurality of the first terminals of the meter mounting unit, , MOF mounting unit for outputting a response signal in response to the diagnostic signal when the diagnostic signal is received through any one of the plurality of second terminals; And
And a controller configured to diagnose whether there is a faulty connection between the power meter and the MOF based on the diagnostic signal and the response signal thereto.
According to claim 1,
The control unit,
If the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of first terminals, the connection to the corresponding terminal is diagnosed as normal, otherwise, if no response signal is output, an incorrect connection is made. MOF incorrect connection diagnostic device characterized in that the diagnosis.
According to claim 1,
The instrumentation unit,
And a display unit for displaying whether or not there is a faulty connection between the watt hour meter and the MOF.
According to claim 1,
The instrumentation unit transmits signals to the MOF unit by sequentially or simultaneously outputting predetermined diagnostic signals corresponding to each terminal through the plurality of first terminals,
The MOF mounting unit, if the diagnostic signal is sequentially or simultaneously received through the plurality of second terminals, the MOF misconnection diagnosis apparatus, characterized in that sequentially or simultaneously responding to the diagnostic signal to output a response signal.
According to claim 1,
The instrument mounting unit is provided with a first transmission and reception unit, the MOF mounting unit is provided with a second transmission and reception unit, MOF misconnection diagnosis apparatus characterized in that for transmitting and receiving signals to each other.
It is provided on the terminal block of the metering out fit (MOF) including the current transformer CT and the transformer PT, and the MOF mounting unit outputs a preset diagnostic signal corresponding to each terminal through a plurality of second terminals. ;
It is provided on the terminal block of the watt-hour meter, and has a plurality of first terminals respectively corresponding to the plurality of second terminals of the MOF mounting unit, and when the diagnostic signal is received through any one of the plurality of first terminals, the diagnostic signal An instrument unit for outputting a response signal in response to; And
And a controller configured to diagnose whether there is a faulty connection between the power meter and the MOF based on the diagnosis signal and the response signal thereto.
The method of claim 6,
The control unit,
If the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of second terminals, the connection to the corresponding terminal is diagnosed as normal, otherwise, if no response signal is output, an incorrect connection is made. MOF incorrect connection diagnostic device characterized in that the diagnosis.
The method of claim 6,
The MOF mounting unit transmits a signal to the meter mounting unit by sequentially or simultaneously outputting a preset diagnostic signal corresponding to each terminal through the plurality of second terminals,
The instrument mounting unit, if the diagnostic signal is sequentially or simultaneously received through the plurality of first terminals, the MOF misconnection diagnosis apparatus, characterized in that sequentially or simultaneously responding to the diagnostic signal to output a response signal.
Outputting a preset diagnostic signal corresponding to each terminal through a plurality of first terminals;
Outputting a response signal in response to the diagnosis signal when the diagnosis signal is received through any one of a plurality of second terminals corresponding to the plurality of first terminals of the instrumentation unit; And
Containing; a control unit for diagnosing whether or not the fault between the power meter and the MOF based on the diagnostic signal and the response signal thereto;
The meter mounting part is provided on the terminal block of the watt-hour meter, and the MOF mounting part is provided on the terminal block of the metering out fit (MOF) including the current transformer CT and the meter transformer PT. Way.
The method of claim 9,
In the step of diagnosing whether or not the incorrect connection, the control unit,
If the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of first terminals, the connection to the corresponding terminal is diagnosed as normal, otherwise, if no response signal is output, a wrong connection Diagnosis method of the MOF incorrect connection, characterized in that the diagnosis.
The method of claim 9,
The instrumentation unit transmits signals to the MOF unit by sequentially or simultaneously outputting predetermined diagnostic signals corresponding to each terminal through the plurality of first terminals,
The MOF mounting unit, if the diagnostic signal is sequentially or simultaneously received through the plurality of second terminals, the MOF misconnection diagnosis method, characterized in that sequentially or simultaneously responding to the diagnostic signal to output a response signal.
Outputting a preset diagnostic signal corresponding to each terminal through a plurality of second terminals by the MOF mounting unit;
Outputting a response signal in response to the diagnostic signal when the instrument receiving unit receives the diagnostic signal through any one of a plurality of first terminals respectively corresponding to the plurality of second terminals of the MOF mounting unit; And
Containing; a control unit for diagnosing whether or not the fault between the power meter and the MOF based on the diagnostic signal and the response signal thereto;
The meter mounting part is provided on the terminal block of the watt-hour meter, and the MOF mounting part is provided on the terminal block of the metering out fit (MOF) including the current transformer CT and the meter transformer PT. Way.
The method of claim 12,
In the step of diagnosing whether or not the incorrect connection, the control unit,
If the response signal is a preset signal corresponding to a diagnostic signal output from any one of the plurality of second terminals, the connection to the corresponding terminal is diagnosed as normal, otherwise, if no response signal is output, an incorrect connection is made. Diagnosis method of the MOF incorrect connection, characterized in that the diagnosis.
The method of claim 12,
The MOF mounting unit transmits a signal to the meter mounting unit by sequentially or simultaneously outputting a preset diagnostic signal corresponding to each terminal through the plurality of second terminals,
The instrument mounting unit, if the diagnostic signal is sequentially or simultaneously received through the plurality of first terminal sequentially or simultaneously responds to the diagnostic signal to output a response signal MOF incorrect connection diagnostic method.

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