JP2006038707A - Polarity checking device of plug socket with earth electrode - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To check whether an earth electrode is earthed or whether connection has no error. <P>SOLUTION: In this polarity checking device of a plug socket with the earth electrode, a master unit includes a means for detecting a current in a zero phase or in an earthing conductor and a transmission means for transmitting existence of a detected current to a slave unit, and the slave unit includes the first current generation means for making a current flow between a voltage pole and a neutral pole of the plug socket, the first current detection means, the second current generation means for making a current flow between the voltage pole and the earth electrode of the plug socket, the second current detection means, a reception means for receiving a signal from the master unit, and a polarity determination means. The polarity determination means determines that polarity connection of the plug socket is correct on condition that the first current detection means detects a current when the first current generation means is operated, and that the reception means does not receive a current detection signal from the master unit, and that the second current detection means detects a current when the second current generation means is operated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an apparatus for checking whether or not each pole of an outlet with a grounding pole is securely connected to a phase pole or grounding line of a power source without making a mistake with other poles and without disconnection.

Conventionally, such check devices have been disclosed in Patent Documents 1, 2, and 3. In Patent Document 1, a resistor is connected from the voltage pole of the outlet to the grounding pole to check whether or not current flows. If current does not flow, grounding is not successful or the grounding wire is connected. It is like judging that it is not done or is disconnected.

In addition, Patent Documents 2 and 3 show that not only the connection of the grounding electrode but also the connection of the neutral electrode and the grounding electrode is incorrect (the neutral phase is grounded to the grounding electrode of the outlet). (The wire is connected to the neutral pole of the outlet).
JP 2000-180496 A JP-A-5-31878 JP 2003-107121 A

However, the method according to Patent Document 1 has a problem that it is not possible to check the connection error between the neutral electrode and the ground electrode shown in Patent Documents 2 and 3, and the method according to Patent Document 2 cannot be performed via the same resistor. Compare the current flowing from the voltage electrode to the neutral electrode and the current flowing from the voltage electrode to the ground electrode, and determine the connection error. When the grounding resistance is low (according to Patent Document 2, it becomes 1Ω or less) There was a problem that it was difficult to distinguish.

In recent years, in buildings, etc., there are many cases where the grounding of transformers that receive high voltage and convert it to low voltage is common with the grounding of load equipment, in which case the resistance of the grounding electrode may be very low, In addition, the introduction of a method of routing the grounding wire from the grounding point on the power source side to the end as shown in Fig. 8, called the TN method in the IEC standard, is called out as the wiring equipment method in Japan. The difference between the resistance of the wire and the resistance of the neutral phase is equal to zero, and in such a case, it is difficult to determine a connection error by the method according to Patent Document 2.

In the method according to Patent Document 3, a ground fault current is caused to flow from the voltage electrode to the ground electrode on the slave unit connected to the outlet, and the zero-phase current is detected by the master unit installed on the distribution board side, and the value is transferred to the slave unit. Since the transmission state is read and the value is read by the slave unit, the connection state of the grounding electrode is confirmed. Therefore, even when the grounding resistance or the resistance of the grounding wire is low, it is not impossible to make a determination as in Patent Document 2. .

However, the determination by the method of Patent Document 3 is complicated because a person makes a comprehensive determination from lighting of a voltage detector lamp, display of a voltage value of a voltmeter, a zero-phase current value, and the like. It is easy to make mistakes, and the ground fault current in the main unit is detected by a zero-phase current transformer. In the single-phase three-wire system, the current transformer must penetrate three wires. It is difficult to find a convenient clamping location that can clamp a single wire at a time on an actual distribution board, the current transformer is large and expensive, and the load capacitance of the distribution board depends on the capacitance to ground If there is a dark leakage current, the dark leakage current is detected and accurate determination cannot be made.

Therefore, the object of the present invention is to reliably check whether each pole including the grounding pole of the outlet with a grounding pole is definitely connected, even when the grounding resistance and grounding resistance are very low. In addition, it is an object of the present invention to provide a check device that can quickly obtain an accurate determination result, and that can easily and inexpensively install the current transformer of the master unit.

The invention of claim 1 comprises a master unit installed on a distribution board and a slave unit connected to an outlet with a grounding pole connected to the distribution board. The master unit detects a zero-phase or ground line current. Means for transmitting and transmitting means for transmitting the presence / absence of the detected current to the slave unit, wherein the slave unit includes first current generating means for passing a current between the voltage electrode and the neutral electrode of the outlet, and the first current Detecting means, second current generating means for supplying current to the voltage pole and ground pole of the outlet, the second current detecting means, receiving means for receiving a signal from the master unit, and polarity determining means The polarity determination means includes: a first current detection means detecting a current when operating the first current generation means; a receiving means not receiving a current detection signal from the master; The second current detection means detects the current when the current generation means is activated. Is obtained by providing a polarity connection check device of the ground electrode with outlet and judging cents polarity connection is ok.

The invention of claim 2 comprises a master unit installed on the distribution board and a slave unit connected to an outlet with a grounding electrode connected to the distribution board. The master unit detects a zero-phase or ground line current. Means for transmitting and transmitting means for transmitting the presence / absence of the detected current to the slave unit, wherein the slave unit includes first current generating means for passing a current between the voltage electrode and the neutral electrode of the outlet, and the first current Detecting means, second current generating means for passing current through the voltage electrode and the ground electrode, receiving means for receiving a signal from the master unit, and polarity determining means, the polarity determining means comprising the first current When the generating means is activated, the first current detecting means detects the current, and when the second current generating means is activated, the receiving means receives the current detection signal from the master unit. The polarity of the outlet with a grounding pole characterized by determining that the polarity connection is correct Those that provided the connection checking device.

The invention of claim 3 comprises a master unit installed on the distribution board and a slave unit connected to an outlet with a grounding pole connected to the distribution board, and the master unit detects a zero-phase or ground line current. Means for transmitting and transmitting means for transmitting the presence / absence of the detected current to the slave unit, wherein the slave unit includes a first voltage determination unit between the voltage electrode and the neutral electrode of the outlet, and a first voltage determination unit between the voltage electrode and the ground electrode. Second voltage determination means, current generation means between the voltage electrode and the ground electrode, reception means for receiving a signal from the parent device, and polarity determination means, the polarity determination means comprising first and second voltage It is determined that there is no mistake in the polarity connection of the outlet on the condition that any of the judging means detects a predetermined voltage and the receiving means receives a current detection signal from the master unit when the current generating means is activated. Provided a polarity connection check device for an outlet with a grounding electrode Than it is.

The invention of claim 4 comprises a master unit installed on the distribution board and a slave unit connected to an outlet with a grounding electrode connected to the distribution board. The master unit detects a zero-phase or ground line current. Means for transmitting and transmitting means for transmitting the presence / absence of the detected current to the slave unit, wherein the slave unit includes a first voltage determination unit between the voltage electrode and the neutral electrode of the outlet, and a first voltage determination unit between the voltage electrode and the ground electrode. Two voltage judging means, a current generating means between the voltage electrode and the neutral electrode, a receiving means for receiving a signal from the parent device, and a polarity judging means, the polarity judging means comprising the first and second There is no doubt that the polarity connection of the outlet is correct, provided that all of the voltage judging means detect a predetermined voltage and that the receiving means has not received the current detection signal from the parent device when the current generating means is activated. Providing a polarity check device for an outlet with a grounding electrode, It is intended.

The invention of claim 5 comprises a master unit installed on the distribution board and a slave unit connected to an outlet with a grounding pole connected to the distribution board, and the master unit detects a zero-phase or ground line current. And a transmission means for transmitting the presence / absence of the detected current to the slave unit, wherein the slave unit includes a first voltage determination unit between the voltage pole and the neutral pole of the outlet, and between the neutral pole and the ground pole. A second voltage determining means; a current generating means between the voltage electrode and the neutral electrode; a receiving means for receiving a signal from the parent device; and a polarity determining means. The polarity determining means comprises the first voltage determining means. The means detects the predetermined voltage, the second voltage determination means does not detect a voltage larger than the predetermined voltage, and the receiving means outputs the current detection signal from the parent device when the current generating means is activated. It is judged that there is no mistake in the polarity connection of the outlet on the condition that it was not received It is obtained by providing a polarity checking device of the ground electrode with electrical outlet to.

The invention of claim 6 comprises a master unit installed on the distribution board and a slave unit connected to an outlet with a grounding electrode connected to the distribution board. The master unit detects a zero-phase or ground line current. And a transmission means for transmitting the presence / absence of the detected current to the slave unit, wherein the slave unit includes a first voltage determination unit between the voltage pole and the neutral pole of the outlet, and between the neutral pole and the ground pole. A second voltage determining means; a current generating means between the voltage electrode and the ground electrode; a receiving means for receiving a signal from the parent device; and a polarity determining means. The polarity determining means includes the first voltage determining means That a predetermined voltage is detected, that the second voltage measuring means does not detect a voltage greater than the predetermined voltage, and that the receiving means has received a current detection signal from the parent device when the current generating means is activated. On the condition that the polarity of the outlet is determined to be correct. It is obtained by providing a polarity checking device of the pole with electrical outlet.

A seventh aspect of the present invention is directed to the first or second aspect, wherein the slave unit is supplied with drive power from the voltage pole and the neutral pole of the outlet, and is arranged between the voltage pole and the neutral pole of the outlet. And a current detecting means of the current generating means, wherein the function is replaced by operating normally in a state in which the slave unit is connected to the outlet and the power is supplied. A polarity check device is provided.

The invention of claim 8 is that in claim 3 or claim 6, the slave unit is supplied with drive power from the voltage pole and neutral pole of the outlet, and is arranged between the voltage pole and neutral pole of the outlet. The voltage determination means provides a polarity check device for an outlet with a grounding electrode, wherein the function is replaced by operating normally when the slave unit is connected to the outlet and power is supplied. .

A ninth aspect of the present invention is directed to the fourth or fifth aspect, wherein the slave unit is supplied with driving power from the voltage pole and the neutral pole of the outlet, and is connected between the voltage pole and the neutral pole of the outlet. The polarity check device for the outlet with a grounding pole is characterized in that the current generating means and the voltage judging means are replaced by functioning normally when the slave unit is connected to the outlet and the power is supplied. Is provided.

In any of the first to sixth aspects of the invention, first, not only the grounding electrode of the outlet but also the connection error of the voltage electrode and the neutral electrode can be checked. Second, even when the ground resistance or the ground line resistance is very low, it can be determined. Third, since a polarity determination unit that comprehensively determines whether there is a connection error is provided, there is an effect that there is no determination error and the determination result can be immediately known.

Further, when the current transformer for detecting the ground fault current is installed in the grounding wire according to the inventions of claims 1 to 6, the current transformer is small, and the installation work is easy as well as the cost. It has the effect of being cheap.

In addition, the inventions of claim 1, claim 4 and claim 5 do not make the judgment condition that the ground fault current is detected in the ground connection judgment of the ground electrode, and therefore the effect of not making a false judgment with the dark leakage current. There is.

The inventions of claims 7, 8 and 9 have the effect that the inventions of claims 1 to 6 can be provided at a low cost with a simpler configuration.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a first embodiment of a connection check device for an outlet with a ground electrode according to claim 1 of the present invention.

In FIG. 1, 1 is a transformer for power supply, which is a single-phase three-wire system. 2 is a supply wire for the first voltage phase (L1), 3 is a supply wire for the neutral phase (N), and 4 is a supply wire for the second voltage phase (L2). 5 is a ground wire on the transformer side, and the neutral phase is grounded. 6 is a distribution board, 7 is a main breaker, and an earth leakage breaker is generally used. 8 is a branch breaker, 9 is an outlet with a ground electrode connected to the 8 branch breaker, 901 is a neutral electrode, 902 is a voltage electrode, 903 is a ground electrode, and 10 is a ground wire, which is a ground terminal of the distribution board 11 and further connected to the ground via a grounding wire 12.

Reference numeral 13 denotes a master unit connected to the distribution board side. Reference numeral 1301 denotes a current sensor which detects a ground line current. 1302 is an amplifying unit for detection output of the current sensor, 1303 is a detection signal output unit for outputting a signal when the output of the amplifier exceeds the threshold, and 1304 is a detection signal output. It is a transmission part which receives the output of a part and sends out a detection signal to a subunit | mobile_unit. The threshold value is provided for the detection current in order to avoid the influence of noise, and an additional filter may be provided.

Reference numeral 14 denotes a slave unit according to the present invention which is connected to an outlet. 1401 is a plug blade connected to the neutral pole 901 of the outlet, 1402 is a plug blade connected to the voltage pole 902 of the outlet, 1403 is a plug blade connected to the grounding pole 903 of the outlet, and 1403 is a grounding pole of the outlet. In the case of a screw terminal, a lead wire connected to the terminal may be used. Reference numeral 1404 denotes a first current generating means between the voltage pole 902 of the outlet and the neutral pole 901, and includes a current limiting resistor and an open / close switch as elements. Reference numeral 1405 denotes second current generating means between the voltage pole 902 and the grounding pole 903 of the outlet, and also includes a current limiting resistor and an open / close switch. The current value generated by the operation of the second current generating means is set to a current that does not activate the leakage breaker function of the leakage breaker installed on the power source side from the outlet 9. Reference numeral 1406 denotes a receiving unit that receives a transmission signal from the parent device 13, 1407 denotes a second current detection unit that detects a current flowing through the ground electrode plug blade 1403, and 1408 denotes a current flowing through the neutral phase electrode plug blade 1401. A first current detection unit 1409 to be detected is a polarity determination unit. The first and second current detection units are appropriately provided with thresholds, noise filters, and the like according to the currents detected.

The parent device 13 and the child device 14 as described above work as follows. First, the sub unit 14 operates the second current generating means 1405 (closes the circuit) to flow a current from the voltage electrode of the outlet to the ground electrode. If a predetermined current flows at this time, there is a predetermined potential difference between at least the voltage electrode of the outlet and the ground electrode. The second current detection unit 1407 detects this and sends a current detection signal to the polarity determination unit 1409.

Next, the child device 14 operates the first current generating means 1404 (closes the circuit) to flow a current between the voltage electrode and the neutral electrode of the outlet. If a current flows at this time, there is a predetermined potential difference between the two electrodes, and the first current detection unit 1408 detects this and sends a current detection signal to the polarity determination unit 1409.

If each pole of the outlets 901 and 902 is connected to either the voltage phase or the neutral phase, the current from the first current generator does not flow to the ground line, so the current sensor 1301 detects the current. The current detection signal is not transmitted from the parent device 13 to the child device 14.

Therefore, in the above case, there is a predetermined potential difference between the poles 901 and 902 of the outlet, and there is also a predetermined potential difference between the poles 903 and 902, so at least 902 is connected to the voltage electrode. Will be. Next, since the current sensor 1301 does not detect a current, 901 is connected to the neutral phase instead of the ground electrode. Since 902 is connected to the voltage phase and 901 is connected to the neutral phase, and a current flows between 902 and 903, the pole of 903 is connected to the ground line. Therefore, the polarity determination unit 1409 has current detection signals from both the first detection unit current detection unit 1408 and the second current detection unit 1407, and the reception signal of the transmission signal of the parent unit current detection signal is received from the reception unit 1406. It is possible to determine that each pole of the outlet 9 is definitely connected to the voltage phase, neutral phase, and ground line of the electric circuit on the condition that it does not come out. In this case, the pass / fail of polarity connection can be displayed by the polarity determination unit or another display device (not shown).

If 902 is not connected to the voltage phase, for example, 901 is connected to the voltage phase, no detection signal is generated from the second current detection unit 1407, and 901 and 903 are mistaken for each other. If the 901 is connected to the ground line, the current is detected as a ground fault current by the current sensor 1301 by the operation of the first current generator 1404. Since the current detection signal is transmitted to the slave unit 14 and the reception signal is transmitted from the reception unit 1406 to the polarity determination unit 1409, the polarity determination unit does not determine that the connection is correct.

Signal transmission from the transmission unit 1304 of the parent device 13 to the reception unit 1406 of the child device 14 may be performed wirelessly or may be performed by power carrier. In extreme cases, the signal line may be routed by wire. In addition, the determination of the presence or absence of the current detection signal from the parent device by the reception unit 1406 may be performed between the first current generation unit 1404 with a certain time lag after the operation.

As described above, in the invention of FIG. 1 according to claim 1, first, it can be checked whether there is a connection error or disconnection of each pole of the outlet. Secondly, the determination of the connection error of each pole does not include the elements of ground resistance and ground line resistance, so it can be determined even when the ground resistance and ground line resistance are very low. Thirdly, since the polarity determination unit 1409 is provided in the slave unit, only the determination result of pass / fail is known, and the determination result is accurate and quick compared with the case where a person makes a comprehensive determination based on various displays. It is done. Fourth, since the current transformer is installed on the ground wire, the current transformer can be made smaller, the current transformer can be easily installed, and the cost of the current transformer can be reduced. Fifth, since the determination of the wrong connection of poles is based on the condition that no current flows through the grounding wire, no erroneous determination is made even when a dark leakage current is flowing through the electric circuit.

FIG. 2 is a diagram of a second embodiment of claim 1 of the present invention. The difference from FIG. 1 is that the current sensor 1301 of the parent unit 13 detects a zero-phase current. . The basic operation is the same as that of the example of FIG. 1, but is the same as that of the embodiment of FIG. 1 except that the fourth effect described above cannot be expected.

FIG. 3 shows a first embodiment of claim 2 of the present invention. In the figure, the components other than the slave unit 15 are the same as those in FIG. 3 and 140 in FIG. 1, 1501 in FIG. 3 is 1401 in FIG. 1, 1502 is 1402, 1503 is 1403, 1504 is 1404, 1505 is 1405, and 1506 is 1406. 1508 corresponds to 1408, and 1509 corresponds to 1409. The difference is that there is no means corresponding to the second current detection means 1407 shown in FIG. 1, and the determination method of the polarity determination unit 1509 is different from 1409 in FIG.

The operation of the check device shown in FIG. 3 is as follows. First, the first current generating means 1504 of the slave unit 15 is actuated (the circuit is closed), whereby the current detecting means 1508 detects whether or not current flows between the poles 901 and 902 of the outlet. Next, the second current generating means 1505 is activated (the circuit is closed). If the grounding electrode 903 of the outlet is correctly connected to the grounding wire and the voltage electrode 902 is correctly connected to the voltage phase, the ground fault current flows through the grounding wire 10, so the master unit 13 detects the current, and the transmission unit 1304 detects the current. The current detection signal is transmitted to the device 15. The polarity determination unit 1509 of the slave unit 15 has a current detection output from the current detection unit 1508 when the first current generation unit 1504 is operated, and the reception unit 1506 when the second current generation unit 1505 is operated. It is determined that the connection is correct on condition that there is a reception output of the current detection signal from the device 13.

If the 902 pole of the outlet is not connected to the voltage phase, either one of the current generator 1504 and the second current generator 1505 does not always flow because of the operation of the first current generator 1504. That is, the 902 poles are connected to the voltage phase, and the remaining 901 and 903 poles are connected to either the neutral phase or the ground line. Next, if 901 is connected to the ground line and 903 is mistakenly connected to the neutral phase, no current flows through the ground line due to the operation of the second current generating means. Without detection, the master unit does not transmit a current detection signal to the slave unit, so that no reception signal is output from the receiving unit 1506 of the slave unit 15. Therefore, it can be determined that the connection of the outlet is correct when signals are output from both the current detection unit 1508 and the reception unit 1506.

In the first embodiment of claim 2 as described above, the fifth effect is eliminated, but the other effects are the same as those of the embodiment of claim 1 shown in FIG.

In the embodiment of FIG. 1, it is possible to change the current sensor of the parent unit from the ground line to the zero phase in the example of FIG. In that case, the fourth effect is further eliminated from the effect of the embodiment shown in FIG. 3, but the other effects are the same.

FIG. 4 is a diagram of a first embodiment of claim 3. In the figure, the components other than the slave unit 16 are the same as those shown in FIGS. 1601 of the slave unit 16 corresponds to 1301 of the slave unit 13 of FIG. 1, and similarly, 1602 corresponds to 1302, 1603 to 1303, 1605 to 1305, 1606 to 1306, and 1609 to 1309, respectively. . Reference numeral 1610 denotes first voltage determination means between the poles 901 and 902 of the outlet, and reference numeral 1611 denotes second voltage determination means between the poles 902 and 903 of the outlet. The polarity determination unit 1609 is different from the method 1309 shown in FIG.

Next, the operation of the embodiment shown in FIG. 4 will be described. First, the first and second voltage determining means determine the potential difference between the poles 901 and 902 and the poles 902 and 903 of the outlet. In either case, if there is a potential difference of about 100 V between the electrodes, a determination output with voltage is output. In this case, the pole of 902 is connected to the voltage phase. Next, or simultaneously, the current generating means 1605 is operated. If the 903 pole of the outlet is connected to the ground wire, a ground fault current flows through the ground wire, so the sensor 1301 of the parent device detects the current, and the transmitter 1304 transmits a current detection signal to the child device. Then, the receiving unit 1609 of the slave unit sends the received signal to the polarity determining unit 1609. The polarity determination unit 1609 determines that there is no mistake in the connection of the outlet when there is a voltage detection output of the first and second voltage determination units and there is a reception output from the reception unit 1606.

If the 902 pole of the outlet is not connected to the voltage phase, either the first or second voltage determination unit does not detect the voltage. In addition, when the connection between 901 and 903 is wrongly connected between the ground electrode and the neutral phase, the grounding current is not generated in the ground wire 10 due to the operation of the current generator 1605, so that the sensor 1301 generates the current. Since no detection is performed and no reception output is generated from the reception unit 1609, the determination unit 1609 does not determine that the connection is correct.

The invention of claim 3 shown in FIG. 4 is the same as that of the invention of claim 1 shown in FIG. 1 except that there is no fifth effect. Further, the fact that the current sensor of the parent device may be detected in the zero phase without providing the ground wire is the same as the case of the embodiment of claim 2 of FIG. The same applies to the difference from the embodiment.

FIG. 5 shows a first embodiment of the invention shown in claim 4, which is the same as the invention of claim 3 shown in FIG. The difference between the child unit 16 in FIG. 4 and the child unit 17 in FIG. 5 is that the current generating unit 1704 is located between the poles 901 and 902 of the outlet and the determination method of the polarity determining unit 1709 is different.

Next, the operational differences between the embodiments shown in FIGS. 4 and 5 will be described. In the embodiment of FIG. 4, when the current generating means 1605 is activated, the receiving unit 1606 receives the current detection signal from the parent device and sends the received output to the polarity determining unit 1609. In the embodiment shown in FIG. 5, the determination condition is that the receiving unit 1706 does not receive the current detection signal from the parent device 13 when the current generation unit 1704 is activated. That is, as in the embodiment of FIG. 4, there is a potential difference (about 100 V) between the poles 901 and 902 of the outlet, and there is also a potential difference (about 100 V) between the poles 903 and 902. Although it is connected to the voltage phase, it cannot be determined by itself whether the poles 901 and 903 are connected to the neutral phase or to the ground line. Therefore, in FIG. 4 described above, when the current generating means 1605 is disposed between the poles 902 and 903 of the outlet and the current generating means 1605 is operated, if a current flows through the grounding wire 10, 903 becomes the grounding wire. It is determined that it is connected to. In the embodiment of FIG. 5, conversely, the current generating means 1704 is arranged between the poles 901 and 902 of the outlet, and when the current generating means is operated, the current 901 does not flow to the ground wire 10, so that 901 is neutral phase. It is determined that it is connected to.

The invention of claim 4 shown in FIG. 5 is the same as the effect of the invention of claim 1 shown in FIG. Further, the fact that the current sensor of the master unit may be detected in the zero phase without providing the ground wire is the same as in the second embodiment of claim 1 of FIG. This is the same as the first aspect.

FIG. 6 shows a first embodiment of the invention shown in claim 5, which is the same as the invention of claim 4 shown in FIG. The difference between the child unit 17 in FIG. 5 and the child unit 18 in FIG. 6 is that the second voltage determination unit 1711 of the child unit 17 in FIG. 5 determines the potential difference between the voltage electrode 902 and the ground electrode 903. , The voltage determination unit 1812 is between the neutral electrode 901 and the ground electrode 903 of the outlet.

Therefore, in the embodiment of FIG. 6, the determination unit 1809 has a detection output from the first voltage determination unit 1810, no detection output from the second voltage determination unit 1812, and a reception output from the reception unit 1806. The judgment condition is that there is no.

The effect of the invention, changing the current sensor of the parent device from the ground line to the zero phase, and the effect are the same as in the embodiment of FIG.

FIG. 7 shows a first embodiment of the invention shown in claim 6, which is the same as the invention of claim 5 shown in FIG. The difference between the child unit 18 in FIG. 6 and the child unit 19 in FIG. 7 is that the current generator 1804 of the child unit 18 in FIG. 6 is arranged between the voltage electrode 902 and the neutral electrode 901. In this embodiment, the voltage is placed between the voltage electrode 902 and the ground electrode 903 as 1905.

Therefore, in the embodiment of FIG. 7, the polarity determination unit 1909 has a detection output from the first voltage determination unit 1810, no detection output from the second voltage determination unit 1812, and reception from the reception unit 1806. The judgment condition is that there is output.

The effect of the invention, changing the current sensor of the parent device from the ground line to the zero phase, and the effect are the same as in the embodiment of FIG.

1 to FIG. 7, the first current generating means 1404 and the first current detecting means 1408 of FIG. 1, the current generating means 1504 and the current detecting means 1508 of FIG. 3, and the first current generating means 1508 of FIG. 5, the current generator 1704 and the first voltage determiner 1710 in FIG. 5, the current generator 1804 and the voltage determiner 1810 in FIG. 6, and the first voltage determiner 1910 in FIG. When power is supplied from the voltage pole and the neutral pole of the outlet, the above-mentioned means can be replaced by normal operation of the slave unit.

That is, in FIG. 1, the current generating means 1404 can be replaced with the power switch of the slave unit and the consumption current of the slave unit, and the current detecting means 1408 can be replaced with the slave unit operating normally. is there. This is because if the handset does not operate normally, no current consumption occurs and the polarity determination unit does not function normally. The same applies to FIG. Also in FIG. 4, the first voltage determination unit 1610 can be replaced by the fact that the slave unit operates normally. The same applies to FIG. The current generating means 1704 in FIG. 5 can be replaced with the power switch of the child unit and the current consumption of the child unit, and the first voltage determination unit can also be replaced with the child unit operating normally. The same applies to FIG.

With only the function of the present invention, it is possible to configure a device that determines whether or not each pole of an outlet with a ground pole is correctly connected.

In addition, in a configuration having a main unit installed on the distribution board side and a sub unit connected to the outlet side like a branch circuit connection check device of a distribution board as shown in Patent Document 3, and having other functions, Can be used in combination with other functions.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit configuration diagram illustrating a first embodiment of the present invention. It is a figure explaining the 2nd Example of this invention and Claim 1. FIG. It is a circuit configuration diagram illustrating the first embodiment of the present invention and claim 2. It is a circuit configuration diagram for explaining the first embodiment of the present invention and claim 3. FIG. 5 is a circuit configuration diagram for explaining the first embodiment of the present invention and claim 4; FIG. 6 is a circuit configuration diagram for explaining the first embodiment of the present invention and claim 5; It is a circuit configuration diagram for explaining the first embodiment of the present invention and claim 6. It is a figure explaining the power distribution system by TN grounding of IEC.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transformer 2 1st voltage phase wire 3 Neutral phase wire 4 Second voltage phase wire 5 Grounding wire 6 Distribution board 7 Main breaker 8 Branch breaker 9 Outlet 901 with a grounding electrode 901 Neutral phase electrode 902 Voltage phase electrode 903 Grounding electrode 10 Grounding wire 11 Grounding terminal 12 Grounding wire 13 Master unit 1301 Current transformer 1302 Amplifying unit 1303 Current detecting unit 1304 Signal transmitting unit 14, 15, 16, 17, 18, 19 Slave unit 1401, 1402, 1403 Plug blade 1501 , 1502, 1503 Plug blades 1601, 1602, 1603 Plug blades 1701, 1702, 1703 Plug blades 1801, 1802, 1803 Plug blades 1901, 1902, 1903 Plug blades 1404, 1504 First current generators 1405, 1505 Second current Generator 1605, 1704, 1804, 1905 Current generator 1406, 150 , 1606, 1706, 1806, 1906 Receiving unit 1407 Second current detection unit 1408 First current detection unit 1508 Current detection unit 1409, 1509, 1609, 1709, 1809, 1909 Determination unit 1610, 1710, 1810, 1910 1st Voltage determination unit 1611, 1711, 1812, 1912 Second voltage determination unit

Claims (9)

A main unit installed on the distribution board and a sub unit connected to an outlet with a grounding pole connected to the distribution board, and the main unit includes a means for detecting a zero-phase or ground line current and the detection current Transmitting means for transmitting presence / absence to the slave unit, the slave unit comprising: first current generating means for passing current between the voltage pole and the neutral pole of the outlet; the first current detecting means; A second current generating means for causing a current to flow through the voltage electrode and the ground electrode; a second current detecting means; a receiving means for receiving a signal from the parent device; and a polarity determining means. , When the first current generating means was activated, the first current detecting means detected current, the receiving means did not receive the current detection signal from the parent device, the second current generating means was activated When the second current detection means detect the current, the outlet polarity connection Polar connection check device of the ground electrode with outlet and judging with no doubt. A main unit installed on the distribution board and a sub unit connected to an outlet with a grounding pole connected to the distribution board, and the main unit includes a means for detecting a zero-phase or ground line current and the detection current Transmitting means for transmitting presence / absence to the slave unit, the slave unit comprising: first current generating means for passing a current between the voltage pole and the neutral pole of the outlet; the first current detecting means; and the voltage pole And a second current generating means for passing a current to the grounding electrode, a receiving means for receiving a signal from the master unit, and a polarity determining means, the polarity determining means when the first current generating means is activated, It is determined that the polarity connection of the outlet is correct, provided that the first current detection means detects the current and the receiving means receives the current detection signal from the master unit when the second current generation means is activated. A device for checking the polarity connection of an outlet with a grounding electrode. A main unit installed on the distribution board and a sub unit connected to an outlet with a grounding electrode connected to the distribution panel, and the main unit includes a means for detecting a zero-phase or ground line current and the detected current Transmitting means for transmitting presence / absence to the slave unit, the slave unit including a first voltage determination unit between the voltage pole and the neutral pole of the outlet, and a second voltage determination unit between the voltage pole and the ground pole; Current generating means between the voltage electrode and the ground electrode, receiving means for receiving a signal from the master unit, and polarity determining means, both of the first and second voltage determining means being predetermined. The grounding electrode is characterized in that it is determined that there is no mistake in the polarity connection of the outlet on the condition that when the current generating means is activated, the receiving means has received a current detection signal from the master unit. A device for checking the polarity connection of a power outlet. A main unit installed on the distribution board and a sub unit connected to an outlet with a grounding electrode connected to the distribution panel, and the main unit includes a means for detecting a zero-phase or ground line current and the detected current Transmitting means for transmitting presence / absence to the slave unit, the slave unit including a first voltage determination unit between the voltage pole and the neutral pole of the outlet, and a second voltage determination unit between the voltage pole and the ground pole; Current generating means between the voltage electrode and the neutral electrode, receiving means for receiving a signal from the parent device, and polarity determining means, both of the first and second voltage determining means. It is characterized in that it is determined that there is no mistake in the polarity connection of the outlet on the condition that a predetermined voltage is detected and that the receiving means has not received a current detection signal from the master unit when the current generating means is activated. Polarity check device for outlets with grounding pole A main unit installed on the distribution board and a sub unit connected to an outlet with a grounding electrode connected to the distribution panel, and the main unit includes a means for detecting a zero-phase or ground line current and the detected current Transmitting means for transmitting presence / absence to the slave unit, the slave unit comprising: first voltage determination means between the voltage pole of the outlet and the neutral pole; and second voltage determination means between the neutral pole and the ground pole; , A current generating means between the voltage electrode and the neutral electrode, a receiving means for receiving a signal from the parent device, and a polarity judging means, wherein the first voltage judging means detects a predetermined voltage. The second voltage determination means does not detect a voltage higher than a predetermined voltage, and the receiving means does not receive the current detection signal from the parent device when the current generating means is activated. The connector with a grounding pole is characterized in that it is determined that the polarity connection of the outlet is correct. St. polarity checking device. A main unit installed on the distribution board and a sub unit connected to an outlet with a grounding electrode connected to the distribution panel, and the main unit includes a means for detecting a zero-phase or ground line current and the detected current Transmitting means for transmitting presence / absence to the slave unit, the slave unit comprising: first voltage determination means between the voltage pole of the outlet and the neutral pole; and second voltage determination means between the neutral pole and the ground pole; , A current generating means between the voltage electrode and the grounding electrode, a receiving means for receiving a signal from the master unit, and a polarity judging means. The polarity judging means detects the predetermined voltage by the first voltage judging means. If the second voltage measuring means does not detect a voltage larger than the predetermined voltage, and the receiving means receives the current detection signal from the master unit when the current generating means is activated, the polarity of the outlet An outlet with a grounding pole, characterized by determining that the connection is correct Polarity checking device. In Claim 1 or Claim 2, the slave unit is supplied with driving power from the voltage pole and the neutral pole of the outlet, and the current generating means disposed between the voltage pole and the neutral pole of the outlet, The current detecting means of the current generating means is a polarity check device for an outlet with a grounding electrode, wherein the function is replaced by operating normally while the slave unit is connected to the outlet and the power is supplied. In claim 3 or claim 6, the slave unit is supplied with driving power from the voltage pole and the neutral pole of the outlet, and the voltage determining means arranged between the voltage pole and the neutral pole of the outlet is A polarity check device for an outlet with a grounding electrode, wherein the function is replaced by operating normally with the device connected to the outlet and supplying power. In Claim 4 or Claim 5, the child device is supplied with driving power from the voltage pole and the neutral pole of the outlet, and the current generating means arranged between the voltage pole and the neutral pole of the outlet The voltage check means is a polarity check device for an outlet with a grounding electrode, wherein the function is replaced by operating normally while the slave unit is connected to the outlet and the power is supplied.

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