JP5159805B2 - Plug check device - Google Patents

Description

  The present invention relates to a plug check device used for testing various protective relays installed in a substation of a power system.

  Various protective relays are installed in substations and the like in order to detect abnormalities occurring in the power system and protect the power system. Further, in order to measure the voltage and current of the power system, the power system is provided with a PT (transformer) and a CT (current transformer). Further, a test terminal is provided between the secondary side of PT and CT and the protective relay in order to inspect and test the PT, CT, and the protective relay.

  For example, as shown in FIG. 14, when the PT 110 is installed on the power transmission line, the voltage detected by the PT 110 whose output side is four poles is input to the protective relay 220 via the test terminal 210. The test terminal 210 includes primary side four-pole contact terminals 211A to 214A and secondary side four-pole contact terminals 211B to 214B. The primary side contact terminals 211 </ b> A to 214 </ b> A are connected to the secondary side of the PT 110, and the secondary side contact terminals 211 </ b> B to 214 </ b> B are connected to the protective relay 220. Usually, between the contact terminal 211A and the contact terminal 211B, and between the contact terminal 214A and the contact terminal 214B are short-circuited by contact of the terminals. When an abnormality occurs in the voltage of the power system, the protective relay 220 sends an opening / closing instruction to a circuit breaker (not shown) or the like in order to protect the power system.

  A four-pole PTT, that is, a test plug 300 as shown in FIGS. 15A and 15B is inserted into the test terminal 210. The test plug 300 includes connection terminals 311A, 311B,..., 314A, and 314B on the front surface side of the plug body 301, and terminals 321A, 321B, to 324A and 324B on the back surface side of the plug body 301. Although not shown, the terminals 321A and 321B are arranged to face each other with an insulating material interposed therebetween. That is, the terminal 321B is located on the back side of the terminal 321A. The same applies to the terminals 322A, 322B to 324A, 324B. The connection terminals 311A, 311B,..., 314A, 314B on the front surface side are electrically connected to the terminals 321A, 321B,..., 324A, 324B on the back surface side by wiring inside the plug body 301, respectively. Further, the connection terminals 311A, 311B,..., 314A, 314B on the front surface side are connected to a connection line or the like, so that the terminals can be short-circuited.

  When examining the operation of the protective relay 220 against an abnormal voltage when testing the protective relay 220, between the opposing terminals such as the connection terminal 311A and the connection terminal 311B on the surface side, and the connection terminal 311A and the connection terminal 312A A test plug 300 in which adjacent terminals are opened is inserted into the test terminal 210. As a result, the output side of the PT 110 is opened, and a short circuit of the PT 110 is prevented. Thereafter, for example, as shown in FIG. 16, the test power supply device 230 that supplies the test power is connected to the protective relay 220 through the secondary side of the test terminal 210, and the protective relay 220 is tested. Further, when investigating the operation of the protective relay 220 against abnormal current, the test plug 300, which is a CTT in which the terminals on the front side are opposed and the adjacent terminals on the current transformer side are short-circuited, is inserted into the test terminal 210. . As a result, as shown in FIG. 17, the output side of the CT 120 is short-circuited to prevent the CT 120 from being opened. Thereafter, the test power supply device 230 is connected to the protective relay 220 via the test terminal 210, and the protective relay 220 is tested.

  In such a test, it is necessary to reliably perform a short circuit and an open connection for the connection terminals 311A, 311B to 314A, 314B provided on the surface side of the plug body 301 of the test plug 300. For this purpose, there is a check device for the test plug 300 (see, for example, Patent Document 1). This device includes an open check device according to the number of poles of the test plug 300, a short circuit check device, an internal processing device, and a voice recognition device. And this apparatus checks the short and open of the test plug 300 by a plurality of apparatuses including each of these check apparatuses, and outputs the check result by voice.

Japanese Patent Laid-Open No. 10-19961

  However, the conventional apparatus has the following problems. The conventional apparatus is provided with an open check device corresponding to the number of poles, and a short circuit check device for examining a short circuit. Furthermore, the conventional device requires an internal processing device and a voice recognition device. That is, the conventional device requires a large number of various devices including a check device such as an open check device and a short circuit check device, and as a result, there is a problem that it becomes a high cost device.

  An object of the present invention is to provide a plug check device that solves the above-described problems and eliminates the need for a large number of check devices.

In order to solve the above-mentioned problem, the invention of claim 1 is a plug check device for checking a test plug having a plurality of connection terminals inserted into a test terminal, wherein the test plug is inserted and the connection of the plug is performed. Switch the socket terminal to a socket with multiple terminals in contact with the terminal, a measurement device that checks the electrical continuity of the measurement object connected between the measurement terminals, and one measurement terminal of the measurement device. First switching means for enabling connection, second switching means for enabling connection by switching the terminal of the socket with respect to the other measurement terminal of the measuring device, first switching means, and second switching means control means for testing plug to be measured on the basis of the check result from the measuring device controls the switching is determined whether or not the normal with respect to the test Comprising a switch for specifying the number of poles plug, wherein the first switching means and second switching means to the movable contact is provided according to the number of terminals of the socket, a small socket terminal in the number of poles Are connected in parallel and when the number of poles of the test plug is designated by the switch, the control means and the first switching means and the first switching means according to the switching order of the control table stored in advance according to the number of poles. 2 switching means, a series of checks including full open, full short, open of only one phase are performed, and the result of each check is compared with the check result at normal time stored in advance to make the determination performing, it is plug checking device according to claim.

  According to the first aspect of the present invention, after the test plug is inserted into the socket, the control means controls the switching for the first switching means and the second switching means. As a result, the first switching means can switch and connect the socket terminal to one measurement terminal of the measuring device, and the second switching means can connect to the other measurement terminal of the measuring device. To enable connection. The measurement device checks the electrical continuity of the test plug that is the measurement target connected between the measurement terminals. The control means determines whether or not the test plug is normal based on the check result from the measuring device.

  According to a second aspect of the present invention, in the plug check device according to the first aspect, each of the first switching means and the second switching means includes a movable contact corresponding to the number of socket terminals and one fixed contact, The movable contacts are respectively connected to different terminals of the socket, the fixed contact of the first switching means is connected to one measuring terminal of the measuring device, and the fixed contact of the second switching means is connected to the other measuring terminal of the measuring device. It is characterized by being.

According to a third aspect of the present invention, in the plug check device according to the first or second aspect , the measuring device is at least one of a megger and a tester.

  According to the first aspect of the present invention, it is unnecessary to provide a device for checking a short circuit or the like corresponding to the number of poles of the test plug as in the prior art. In addition, according to the present invention, it is possible to automatically perform test plug check.

  According to the second aspect of the present invention, the first switching means and the second switching means can be formed using an existing product having a fixed contact and a movable contact, such as a rotary switch.

According to the invention of claim 1 , it is possible to cope with test plugs having different numbers of poles by designating the number of poles of the test plug.

According to the invention of claim 3 , it is possible to use existing devices such as a megar and a tester as a measuring device. Furthermore, by using both a megger and a tester, both the insulation resistance and contact resistance of the test plug can be examined simultaneously.

1 is a perspective view showing a plug check device according to Embodiment 1. FIG. It is a block diagram which shows the structure of a plug check apparatus. It is a connection diagram showing the connection of each member. It is a figure which shows the knob part of a changeover switch. It is a front view which shows an operation panel. It is a figure which shows an example of the switch control table for 2 poles. It is a figure which shows an example of the switch control table for 4 poles. It is a figure which shows an example of the switch control table for 8 poles. It is a figure which shows an example of an instruction | indication content table. It is a flowchart which shows an example of a confirmation process. It is a figure explaining formation of a measurement path. It is a figure explaining formation of a measurement path. It is a figure explaining formation of a measurement path. It is explanatory drawing explaining the measurement by PT. FIG. 15A is a plan view of the test plug, and FIG. 15B is a front view of the test plug. It is explanatory drawing explaining the mode of a test of a protection relay. It is explanatory drawing explaining the mode of another test of a protection relay.

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

(Embodiment 1)
A plug check device according to this embodiment is shown in FIG. The plug check device of FIG. 1 is for checking a plurality of test plugs having different numbers of poles, and has insertion ports 10A to 10D opened on the upper surface side of the rectangular parallelepiped main body 10, and on the front side of the main body 10. The arranged operation panel 21, the NO1 changeover switch 22 and the NO2 changeover switch 23, the megger 31 and the tester 32 arranged on one side of the main body 10, and the measurement cord 41 arranged on the other side of the main body 10. , 42. Further, as shown in FIG. 2, the plug check device includes an 8-pole socket 11, a 4-pole socket 12 and a 2-pole socket 13, a control unit 51, and a wiring system 61 inside the main body 10.

  8 pole sockets 11 and 2 pole sockets 13 are respectively provided inside the main body 10 facing the insertion ports 10A to 10C. An 8-pole test plug (not shown) inserted into the insertion port 10A is inserted into the 8-pole socket 11, and a 4-pole test plug (not shown) inserted into the insertion port 10B is inserted into the 4-pole socket 12. (Omitted) is inserted. In addition, a two-pole test plug (not shown) inserted into the insertion port 10C is inserted into the two-pole socket 13. The four-pole test plug is the same as that of FIG. 15 described above, and the eight-pole and two-pole test plugs are the same as the four-pole test plug except for the number of poles. As shown in FIG. 3, the 8-pole sockets 11 and 2 have a pair of, for example, an A1 terminal that is a connection terminal and a B1 terminal that is disposed so as to face the A1 terminal. The 8-pole socket 11 has 8 sets of A1 terminals and B1 terminals,..., A8 terminals and B8 terminals, and the 4-pole socket 12 has 4 sets of A1 terminals and B1 terminals,..., A4 terminals and B4 terminals. Yes. The two-pole socket 13 includes two sets of A1 terminal and B1 terminal, and A2 terminal and B2 terminal. These terminals are in contact with connection terminals provided on the back side of the test plug inserted into the socket.

  The NO1 changeover switch 22 and the NO2 changeover switch 23 include an M0 contact that is a fixed contact, and an M1 contact to M4 contact and an M11 contact to M14 contact that are movable contacts, respectively. As such NO1 changeover switch 22 and NO2 changeover switch 23, for example, an existing rotary switch or the like is applicable. The NO1 changeover switch 22 and the NO2 changeover switch 23 connect the M0 contact to one of the M1 contact to the M4 contact and the M11 contact to the M14 contact by the rotation of the knob portions 22A and 23A shown in FIG. The knob portions 22A and 23A are manually turned by the operator to a scale indicating the position of each contact. The NO1 changeover switch 22 and the NO2 changeover switch 23 are driven by a motor that is controlled by the control unit 51.

The megger 31 is a measuring device that measures an insulation resistance, and the tester 32 is a measuring device that measures the resistance of a test plug or the like, and the voltage or current of a terminal or the like. Megger 31 is provided with a measurement terminal ₃₁ 1, 31 ₂ (Figure 3), measures the insulation resistance of the test plugs are connected to the measurement object between the measurement terminal 31 ₁ and the measurement terminal 31 _2. That is, an existing measuring device is used in this embodiment. Similarly, the tester 32 includes measurement terminals 32 ₁ and 32 ₂ and measures resistance, voltage, and the like of a test plug connected between the measurement terminal 32 ₁ and the measurement terminal 32 ₂ . In this embodiment, the megger 31 and the tester 32 are used as a device for checking the continuity of the test plug, that is, a device for measuring the insulation by the megger 31 and the contact resistance by the tester 32. The megger 31 and the tester 32 send the check result to the control unit 51.

  In the wiring system 61 (FIG. 3), the 8-pole socket 11 to the 2-pole socket 13, the NO1 changeover switch 22 and the NO2 changeover switch 23, the megar 31 and the tester 32 are connected by a plurality of cables.

  Specifically, the wiring system 61 connects between the M1 contact to the M4 contact of the NO1 changeover switch 22 and the M1 contact to the M4 contact of the NO2 changeover switch 23, and the M11 contact to the M14 contact of the NO1 changeover switch 22. The NO2 changeover switch 23 is connected between the M11 contact and the M14 contact.

  The wiring system 61 connects the A1 terminal and the B1 terminal of the 8-pole socket 11 to the 2-pole socket 13 between the M1 contact and the M11 contact of the NO1 changeover switch 22, and the M2 contact and the M12 contact of the NO1 changeover switch 22. Between the A2 terminal and the B2 terminal of the 8-pole socket 11 and the 2-pole socket 13. The wiring system 61 connects the A3 terminal and the B3 terminal of the 8-pole socket 11 and the 4-pole socket 12 between the M3 contact and the M13 contact of the NO1 changeover switch 22, and the M4 contact of the NO1 changeover switch 22. The A4 terminal and B4 terminal of the 8-pole socket 11 and the 4-pole socket 12 are connected between the M14 contacts. Further, the wiring system 61 connects the A5 terminal to the A8 terminal of the 8-pole socket 11 to the M11 contact to the M14 contact of the NO1 changeover switch 22, respectively, and the B5 of the 8-pole socket 11 to the M1 contact to the M4 contact of the NO2 changeover switch 23. Terminals to B8 terminals are connected to each other.

  With such a connection, the A1 terminal and A2 terminal of the two-pole socket 13 and the B1 terminal and B2 terminal are connected to the A1 terminal and A2 terminal of the 8-pole socket 11 and the B1 terminal and B2 terminal. The 2-pole socket 13 is connected in parallel to the 8-pole socket 11. Similarly, the 4-pole socket 12 is connected in parallel to the 8-pole socket 11.

Wiring system 61, the movable contact M0 of NO1 changeover switch 22, via the power switch 31A, a 32A, respectively connected to the measuring terminal 32 ₁ of the measuring terminal 31 ₁ and the tester 32 of the megger 31, the movable contact of NO2 selector switch 23 the M0, respectively connected to the measurement terminal 32 ₂ of the measuring terminal 31 ₂ and the tester 32 of the megger 31. The power switches 31A and 32A switch whether the megar 31 and the tester 32 are connected to the wiring system 61 or not. The power switches 31A and 32A are operated manually by an operator or controlled by the control unit 51.

  Further, the wiring system 61 has a measurement code 41 connected to the M1 contact of the NO1 changeover switch 22 and a measurement code 42 connected to the M11 contact. The measurement cords 41 and 42 are connected to at least one of the megger 31 and the tester 32 by switching the NO1 changeover switch 22 and the NO2 changeover switch 23. The measurement codes 41 and 42 are lead wires having measurement terminals that are brought into contact with a measurement object when the functions of the megger 31 and the tester 32 are used alone. When not in use, the measurement cords 41 and 42 are inserted into the insertion port 10D to prevent the measurement terminals from contacting each other.

  The operation panel 21 is a part operated by an operator. As shown in FIG. 5, in addition to the power switches 31A and 32A described above, push button switches 21A to 21M and confirmation lamps 21Q and 21R are provided. I have.

  The push button switches 21 </ b> A to 21 </ b> M with numbers “1” to “13” are operated by the operator when checking the display contents shown on the side thereof. For example, when the push button switch 21 </ b> A with the number “1” is operated, the operation panel 21 sends an operation signal generated by operating the push button switch 21 </ b> A to the control unit 51. This operation signal represents the number “1” of the operated push button switch 21A and the number of poles “2 poles”. The check performed by the operation of the push button switch 21A of the number “1” is the check of the “bipolar” test plug shown on the upper side of this switch, and the “all” shown on the right side. This is a check for “open”. The display content “full open” is a state in which the connection terminals on the surface side of the test plug are open to each other.

  For example, when the push button switch 21 </ b> B with the number “2” is operated, the operation panel 21 sends an operation signal generated by operating the push button switch 21 </ b> A to the control unit 51. This operation signal represents the number “2” of the operated push button switch 21A and the number of poles “2 poles”. The check performed by operating the push button switch 21B of the number “2” is a check of the “bipolar” test plug shown on the upper side of this switch and “B1” shown on the right side. -B2 short circuit "check. In addition, “B1-B2 short circuit” in the display content means that the B1 terminal and the B2 terminal of the two-pole socket 13 are short-circuited. For this purpose, the corresponding connection terminal on the surface side of the test plug is connected by a jumper wire or the like. Connected.

  Further, for example, when the push button switch 21G having the number “7” is operated, the operation panel 21 sends an operation signal generated by the operation of the push button switch 21G to the control unit 51. This operation signal represents the number “7” of the operated push button switch 21A and the number of poles “4”. The check performed by operating the push button switch 21G of number “7” is a check of the “4-pole” test plug shown on the upper side of this switch, and “A1” shown on the right side. -B1 open, A2-B2, A3-B3, A4-B4 short circuit (red phase missing) ". In the display content, “A1-B1 open” means that the A1 terminal and the B1 terminal of the four-pole socket 12 are opened. For this reason, the corresponding connection terminal on the surface side of the test plug is not connected. It will be in the state of.

  Since the other push button switches 21C to 21F and 21H to 21M are the same as the push button switch 21A, the description thereof is omitted.

  The confirmation lamps 21Q and 21R are lit to indicate whether the check result is normal or abnormal when the control unit 51 performs a check by operating the push button switches 21A to 21M. The confirmation lamps 21Q and 21R are turned on under the control of the control unit 51.

  The control unit 51 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory). In FIG. 2, the CPU, RAM, and ROM are omitted. When the control unit 51 receives an operation signal from the operation panel 21 by operating the push button switches 21A to 21M, the control unit 51 controls the NO1 changeover switch 22 and the NO2 changeover switch 23 to perform a check according to the operation signal. At this time, the control unit 51 checks the continuity with one terminal of the socket into which the test plug is inserted, and performs the same check for all the terminals of the socket. Check if it is normal. In order to perform this check, the control unit 51 stores a switch control table and an instruction content table in advance in the ROM.

  The switch control table records switching between the NO1 changeover switch 22, the NO2 changeover switch 23, and the power switches 31A and 32A. In the case of the two-pole socket 13 into which the two-pole test plug is inserted, the wiring system 61 connects the A1 terminal and the A2 terminal of the two-pole socket 13 to the M1 contact and the M2 contact of the NO1 changeover switch 22 and the NO2 changeover switch 23, respectively. The B1 terminal and the B2 terminal of the two-pole socket 13 are connected to the M11 contact and the M12 contact of the NO1 changeover switch 22 and the NO2 changeover switch 23, respectively. Accordingly, all combinations of the terminals of the NO1 changeover switch 22 and the NO2 changeover switch 23 for checking the continuity with the remaining terminals for each one terminal of the two-pole socket 13 are the two-poles shown in FIG. As shown in the switch control table, there are 8 sets of control data. In the two-pole switch control table, the order of switching between the NO1 changeover switch 22 and the NO2 changeover switch 23 is represented by the item “procedure”. That is, the switch control table records the order of changing the positions of the NO1 changeover switch 22 and the NO2 changeover switch 23 as eight sets of control data in accordance with the “procedure” number of the two-pole switch control table. At this time, the power switches 31A and 32A are set to “ON”.

  The check result is recorded by the control unit 51 in the “confirmation items” of the two-pole switch control table. That is, the confirmation items “1” to “8” of the “procedure” are recorded in the switch control table as confirmation data.

  In the case of the 4-pole socket 12 into which the 4-pole test plug is inserted, the wiring system 61 connects the A1 terminal to A4 terminal of the 4-pole socket 12 to the M1 contact to M4 contact of the NO1 changeover switch 22 and NO2 changeover switch 23, respectively. The B1 terminal to B4 terminal of the four-pole socket 12 are connected to the M11 contact to M14 contact of the NO1 changeover switch 22 and the NO2 changeover switch 23, respectively. Therefore, all combinations of the terminals of the NO1 changeover switch 22 and the NO2 changeover switch 23 for checking the continuity with the remaining terminals for each one terminal of the four-pole socket 12 are the four-poles of FIG. As shown in the switch control table, there are 24 sets.

  Further, in the case of the 8-pole socket 11 into which the 8-pole test plug is inserted, the NO1 changeover switch 22 and the NO2 changeover switch 23 for checking the continuity of each one terminal with the remaining terminals in the same manner. As shown in the 8-pole switch control table of FIG. 8, there are 80 combinations of the terminals.

  The instruction content table is a check corresponding to the push button switches 21A to 21M having numbers “1” to “13” on the operation panel 21 and records data indicating a check in a normal state. That is, the instruction content table has 13 types according to the push button switches 21A to 21M. For example, the check corresponding to the push button switch 21A with the number “1” is a check for the “bipolar” test plug and a check when the test plug is “full open”. On the other hand, the instruction content table representing the normal check result in this case corresponds to the “procedure” of the switch control table, as shown in FIG. The state is recorded as normal state data.

  The remaining 12 types of instruction content tables are the same as the instruction content table corresponding to the push button switch 21A of “1”, and thus the description thereof is omitted.

  Based on the switch control table and the instruction content table, the control unit 51 determines whether or not the inserted test plug is normal by a confirmation process. This confirmation process is shown in FIG. When receiving the operation signal from the operation panel 21, the control unit 51 starts a confirmation process and reads the first control data from the switch control table corresponding to the number of poles represented by the operation signal (step S1). Thereafter, the control unit 51 switches the NO1 changeover switch 22, the NO2 changeover switch 23, and the power switches 31A and 32A, respectively, according to the control data (step S2).

  For example, when the number of poles represented by the operation signal is “two poles”, the control unit 51 reads the two-pole switch control table (FIG. 6). Then, the NO1 changeover switch 22, the NO2 changeover switch 23, and the power switches 31A and 32A are respectively switched according to the first control data recorded in this table. That is, the control unit 51 forms a measurement path R1 by switching these switches as shown in FIG. The measurement path R1 is for short-circuiting the M1 contact of the NO1 changeover switch 22 and the M1 contact of the NO2 changeover switch 23 to check the operation of the megger 31 and the tester 32. Further, in the two-pole switch control table, for example, when the “procedure” is control data “2”, the NO1 changeover switch 22, the NO2 changeover switch 23, and the power switches 31A and 32A are switched, as shown in FIG. The measurement path R2 is formed. The measurement path R2 is for checking the test plug by continuity between the A1 terminal and the A2 terminal of the two-pole socket 13 into which the test plug is inserted. Further, in the two-pole switch control table, for example, when the “procedure” is control data “3”, the NO1 changeover switch 22, the NO2 changeover switch 23, and the power switches 31A and 32A are switched, as shown in FIG. The measurement path R3 is formed. The measurement path R3 is for checking the test plug by continuity between the A1 terminal and the B1 terminal of the two-pole socket 13 into which the test plug is inserted. Since the control data by the 4-pole switch control table and the 8-pole switch control table also forms a path similar to one of the measurement paths R1 to R3, and the test plug is checked by conduction between terminals. These descriptions are omitted.

  When step S2 is completed and the control unit 51 receives the result of measurement by the megar 31 and the tester 32 by switching in step S1 (step S3), the measurement result is displayed in the “confirmation item” column of the switch control table read in step S1. Is recorded, and the confirmation data of the switch control table is updated (step S4).

  When step S4 ends, the control unit 51 checks whether or not the check with all control data in the switch control table has ended (step S5). If all checks have not been completed, the control unit 51 reads the next control data from the switch control table (step S6), and returns the process to step S2.

  On the other hand, when the check by all the control data in the switch control table is completed, the control unit 51 reads the normal state data from the instruction content table corresponding to the “number” of the push button switch of the operation signal received from the operation panel 21. Is read (step S7). After that, the control unit 51 compares the confirmation data of the switch control table that has been updated in the series of processing from step S2 to step S5 with the normal state data read out in step S7 (step S8). Are completely matched (step S9). When the two data completely match, the control unit 51 turns on the confirmation lamp 21Q indicating normality on the operation panel 21 (step S10), and ends the confirmation process. If even one of the two data does not match, the control unit 51 turns on the confirmation lamp 21R indicating an abnormality on the operation panel 21 (step S11), and ends the confirmation process.

  Next, the operation of the plug check device according to this embodiment will be described. For example, the operator opens or shorts the connection terminals arranged on the surface side of the test plug in order to check the protective relay. Thereafter, in order to check the test plug, the plug is inserted into the plug check device. For example, when the test plug is for two poles, the operator inserts the test plug into the insertion port 10 </ b> C of the plug check device, and the terminal on the back side of the test plug is inserted into the two-pole socket 13.

  Thereafter, when the operator operates, for example, the push button switch 21A of the plug check device, a check for two poles by the plug check device starts. As a result of this check, the plug check device turns on the confirmation lamp 21Q indicating normality when the two data are completely in accordance with the comparison result between the normal state data recorded in advance and the confirmation data obtained by the check. To do. When the two data do not completely match, the plug check device turns on the confirmation lamp 21R indicating an abnormality. Thereby, the operator can confirm visually whether a test plug is normalized.

  Thus, according to this embodiment, various checks such as full opening of the test plug, full short circuit, and opening of only one phase can be automatically performed. Further, according to this embodiment, since the check is automatic, it is possible to eliminate omission of the check. Further, according to this embodiment, by connecting the 4-pole socket 12 and the 2-pole socket 13 in parallel to the 8-pole socket 11, all the test plugs to be checked are 2-pole, 4-pole and 8-pole. Can be supported. Moreover, according to this embodiment, since only the megar 31, the tester 32, and the control unit 51 correspond to various conventional apparatuses, it is possible to prevent the apparatus from becoming more expensive than the conventional apparatus. . Further, according to this embodiment, when the test plug is not inserted into the 8-pole socket 11 and the 2-pole socket 13, the NO1 changeover switch 22 is set to the M1 contact, and the NO2 changeover switch 23 is set to the M11 contact. 41 and 42 make it possible to use the Megger 31 or the tester 32 alone.

(Embodiment 2)
In this embodiment, the plug check device includes only one of the megar 31 and the tester 32 of the first embodiment. Further, in this embodiment, the plug check device includes only one of the 8-pole socket 11 and the 2-pole socket 13. Furthermore, in this embodiment, the mega 31 or the tester 32 may be an external type.

  According to the embodiment having such a configuration, a simplified plug check device having a simplified configuration can be provided.

  The present invention is not limited to a test plug, and can also be used for checking a substrate or the like that includes terminals and is short-circuited or opened between terminals.

10 Main body 10A-10D Insertion slot 11-13 8 pole socket-2 pole socket 22 NO1 changeover switch 23 NO2 changeover switch 31 Megger 32 Tester 41, 42 Measurement code

Claims (3)

A plug check device for checking a test plug having a plurality of connection terminals to be inserted into a test terminal,
A socket having a plurality of terminals into which a test plug is inserted and which contacts a connection terminal of the plug;
A measuring device for checking the electrical continuity of the measuring object connected between the measuring terminals;
A first switching means that enables connection by switching the socket terminal to one measurement terminal of the measuring device;
A second switching means for switching and connecting the socket terminal to the other measurement terminal of the measuring device;
Control means for controlling the switching for the first switching means and the second switching means and for determining whether or not the test plug to be measured is normal based on the check result from the measuring device;
A switch for specifying the number of poles of the test plug;
Equipped with a,
The first switching means and the second switching means are connected to the movable contact provided in accordance with the number of terminals of the socket, in parallel with the terminals of the socket having a small number of poles ,
When the number of poles of the test plug is designated by the switch, the control means switches the first switching means and the second switching means according to a switching order of a control table stored in advance according to the number of poles. A series of checks including switching, full opening, full shorting, and opening of only one phase are performed, and the determination is performed by comparing the results of each check with the check results stored in advance when normal.
A plug check device characterized by that. The first switching means and the second switching means include a movable contact corresponding to the number of terminals of the socket and one fixed contact,
Each movable contact is connected to a different terminal of the socket, the fixed contact of the first switching means is connected to one measurement terminal of the measuring device, and the fixed contact of the second switching means is connected to the other measurement terminal of the measuring device. It is connected,
The plug check device according to claim 1. The measuring device is at least one of a megger and a tester.
Plug checking device according to any one of claims 1 or 2, characterized in that.

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