JP2009038902A - Testing device for test plugs - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a testing device for test plugs, having a display portion that allows the result of testing on a test plug to be recognized at a glance. <P>SOLUTION: The testing device includes: a test plug connecting portion 1; a display portion 2 having first light-emitting portions 2A, second light-emitting portions 2B, third light-emitting portions 2C, and fourth light-emitting portions 2D; an insulation detection portion 3; and a light emission control portion 4 that controls the state of light emission of the first to fourth light-emitting portions 2A to 2D of the display portion 2. The first light-emitting portions 2A are disposed in correspondence with hot-line-side contact portions 1R to 1N and non-hot-line-side contact portions 1'R to 1'N. The second light-emitting portions 2B are so constructed as to indicate the state of the area between a hot-line-side contact portion and a non-hot-line-side contact portion of the same phase. The third light-emitting portions 2C are so constructed as to indicate the state of hot-line-side contact portions adjoining between phases on the power supply side. The fourth light-emitting portions 2D are so constructed as to indicate the state of the area between non-hot-line-side contact portions adjoining between phases on the load side. The insulation detection portion 3 detects the insulation resistances between phases and between poles by measurement with a test plug connected to the test plug connecting portion 1 and sends out an abnormal insulation signal if they are abnormal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a test plug test apparatus, and in particular, performs performance determination of a test plug for confirming the operation of a relay, which is a protective device of a power system, that is, conducts a continuity test between phases of the test plug and an insulation performance test between phases. It is useful to apply to cases.

  An example of a power system protection system is shown in FIG. In this protection system, current transformers (CT) 51R, 51W, 51B are provided in the respective phases of the lines 50R, 50W, 50B, one end of which is a neutral point N (hereinafter referred to as each phase of the current transformers 51R to 51B). Are connected to the R, W, B phase, and the phase connected to the neutral point N is called the N phase.), And the other end is connected to the overcurrent relays 53R, 53W, 53B, respectively. Here, a ground fault overcurrent relay 55 is provided between each of the overcurrent relays 53R, 53W, 53B and the neutral point N, and for example, the ground fault overcurrent relay 55 is operated based on the abnormal current at the time of the accident. Based on the transmitted signal, the circuit breaker 59 provided between the lines 50R, 50W, 50B and the transformer 57 is controlled to be cut off.

  In such a protection system, the test terminal 5 is arranged on the switchboard between the overcurrent relays 53R to 53B, the ground fault overcurrent relay 55 and the current transformers 51R to 51B, and the test plug 30 in which the current transformer side is short-circuited is tested. After inserting into the terminal 5, a test device equipped with a meter, a current generator, etc. is connected, and the overcurrent relays 53R to 53B and the ground fault overcurrent relay 55 are tested while the lines 50R to 50B are in a live state. ing.

  As shown in FIG. 8 which is a longitudinal sectional view of the test terminal 5, the test terminal 5 has a box body 6 in which a plug insertion port 7 which is an opening is formed. The apparatus 10 is arranged in parallel corresponding to each of the R, W, B, and N phases. Each contact device 10 includes a power supply side conductor 11 and a load side conductor 21 which are a pair of upper and lower movable contact plates corresponding to each phase.

  On the other hand, the test plug 30 inserted into the test terminal 5 at the time of the test corresponds to each phase and is insulated from each other on the insulating plate 32 protruding from the insulating support 31 as shown in FIG. Each pair of live wire side conductors 35R to 35N and non-live wire side conductors 45R to 45N are juxtaposed, and their base ends are connected to four sets of terminals 37 and 47 arranged coaxially, respectively. Has been.

  In order to avoid the secondary side of the current transformers 51R to 51B being opened, the test plug 30 is connected to the four terminals 37 by a plurality of short-circuit pieces 38, for example, and connected to the live conductors 35R to 35N. In addition to short-circuiting, a test device 60 is connected to another terminal 47 for a predetermined test.

  In a state where the test plug 30 is not inserted into the test terminal 5, the power supply side conductor 11 and the load side conductor 21 are in a closed state between the power supply side terminal 17 and the load side terminal 27 of the test terminal 5. For example, the current transformer 51R shown in FIG. 7 forms a closed circuit with the overcurrent relay 53R and the ground fault overcurrent relay 55.

  On the other hand, when testing the overcurrent relays 53R to 53B and the ground fault overcurrent relay 55, when the test plug 30 is inserted into the test terminal 5 via the plug insertion port 7, the power supply side conductor 11 and the load of each contact device 10 are loaded. The side conductors 21 are separated. As a result, for example, the connection between the current transformer 51R and the overcurrent relay 53R is cut off, and both ends of the current transformers 51R, 51W, 51B are short-circuited by the short-circuit piece 38, and the overcurrent relays 53R, 53W, 53B and A ground fault overcurrent relay 55 is connected to the test apparatus 60.

  Although not shown, such a protection system usually also has an instrument transformer (PT) for detecting an abnormal voltage drop in the lines 50R to 50B at the time of an accident, and such an instrument transformer is also a current transformer. Similarly to the case of the devices 51R to 51B, it is connected to a predetermined relay or the like through a test terminal disposed on the switchboard. Thus, when an abnormal voltage drop in the lines 50R to 50B is detected, the circuit breaker 59 is controlled to be cut off.

  Therefore, there is also a test plug that is inserted into a test terminal of the instrument transformer to perform an operation test of the relay. This has a structure that can prevent erroneous insertion into the test terminal 5 for CT. However, like the test plug 30 shown in FIG. The basic configuration is the same as that of the test plug 30 such that the line-side conductors 35R to 35N and the non-live line-side conductors 45R to 45N are arranged in parallel.

  The soundness of the test plug 30 as described above must be guaranteed as a premise to be inserted into the test terminal 5 or the like. For example, when the predetermined conduction between the live wire side conductors 35R to 35N and the non-live wire side conductors 45R to 45N is not obtained, an accurate operation test cannot be performed. This is because, when not short-circuited, the secondary side of the current transformers 51R to 51B is opened.

  In addition, when the value of the interphase insulation resistance or the interpolar insulation resistance of the test plug 30 is not sufficient, a short circuit accident occurs. Here, the interphase insulation resistance of the test plug 30 refers to the insulation resistance by the insulation member 33 between the active line side conductors 35R to 35N and the non-active line side conductors 45R to 45N of different phases adjacent on the power source side or the load side. The same applies hereinafter, and the inter-electrode insulation resistance refers to the insulation resistance (hereinafter the same) by the insulating member 32 between the live wire side conductors 35R to 35N and the non-live wire side conductors 45R to 45N in the same phase.

  Therefore, various test apparatuses for confirming the soundness of the test plug 30 prior to a predetermined test have been proposed (see Patent Documents 1 to 4).

JP 2001-231153 A Japanese Patent Laid-Open No. 10-19961 Japanese Patent Laid-Open No. 09-113570 Japanese Utility Model Publication No. 05-17777

  The test device for a test plug according to the above prior art does not have or does not have a display unit for visually displaying a test result. In other words, even if it has a function to display the conduction state or the insulation state, it is not structured so that it can be seen at a glance which part of the conduction state is insufficient. There are difficulties.

  An object of the present invention is to provide a test plug test apparatus having a display unit that allows the test results of the test plug as described above to be viewed at a glance.

The first aspect of the present invention for achieving the above object is as follows:
A live conductor that contacts each of a plurality of power supply side conductors of the test terminal connected to each phase on the power supply side and a non-contact that contacts each of the same number of load side conductors of the test terminal connected to each phase on the load side A test device for a test plug in which a live wire side conductor is disposed on each surface of the insulating member facing each other for each phase,
A test plug connection portion having a live wire side contact portion that can be brought into contact with each of the live wire side conductors and a non-hot wire side contact portion that can be brought into contact with each non-live wire side conductor;
The first light-emitting part disposed corresponding to the live-line-side contact part and the non-hot-line-side contact part, the respective live-line-side contact parts and the non-hot-line side corresponding to the same phase on the power supply side and the load side A second light emitting unit configured to represent a state between the contact parts, a third light emitting unit configured to represent a state between the adjacent live line side contact units between the phases on the power supply side, and the load side Display means having a fourth light emitting portion configured to represent a state between the non-hot-wire side contact portions adjacent to each other;
In a state where the test plug is connected to the test plug connecting portion, an interphase insulation resistance that is an insulation resistance between each of the live wire side conductors and each of the non-live wire side conductors, and between each of the live wire side conductors And an insulation detection means for detecting an insulation resistance between the electrodes, which is an insulation resistance between the non-live conductors, and sending an insulation abnormality signal when these are abnormal,
When the insulation abnormality signal is input, the light emission state of the display means is controlled so as to display that the insulation abnormality is present, and the test plug is connected to the test plug connection portion, and the respective phases of the same phase are displayed. Supply current between a live wire side conductor and each non-live wire side conductor, between each live wire side conductor adjacent on the power supply side, and between each non-live wire side conductor adjacent on the load side. The test plug testing apparatus includes: a light emission control unit configured to detect each conduction state and control a light emission state of the display unit so as to display the detection state.

The second aspect of the present invention is:
In the test plug test apparatus described in the first aspect,
The test plug connection part is
The hot-wire-side contact portion or the non-hot-wire-side contact portion is respectively formed on the front end surface that is bent forward and bent from the main body, which is a housing, so as to come into contact with the live-wire-side conductor or non-hot-wire-side conductor of each phase, respectively. A first claw member having
The non-hot-wire side contact is made to the front end surface that is pivotally supported by the main body so as to be in contact with the non-hot-wire-side conductor or the hot-wire-side conductor of each phase and is extended and bent forward. And a second claw member each having a hot wire side contact portion.

The third aspect of the present invention is:
In the test plug test apparatus described in the first or second aspect,
In the test plug test apparatus, the first to fourth light emitting portions in the display means are composed of liquid crystals.

According to a fourth aspect of the present invention, there is provided the test plug test apparatus according to any one of the first to third aspects.
The insulation detection means includes
The live wire side contact portions and the load side conductors in adjacent different phases become different poles, and at the same time, the live wire side contact portions and the load side conductors facing each other in the same phase are different. A test plug testing apparatus having a pair of measurement terminals respectively connected to the power supply side contact portion and the load side contact portion so as to be poles.

  According to the present invention having the above-described configuration, the live wire side contact portion that contacts the live wire side conductor of the actual test plug and the non-hot wire side contact portion that contacts the non-live wire side conductor, and the portion between them are positioned. The display unit includes first to fourth light emitting units that are simulated in model, and the first to fourth light emitting units visually reflect a predetermined conduction or insulation state under the control of the light emission control unit. it can. As a result, the predetermined test result can be easily and quickly visually recognized.

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

  FIG. 1 is a block diagram showing an entire test plug testing apparatus according to an embodiment of the present invention. As shown in the figure, the test plug connecting portion 1 has the function of the test terminal 5 shown in FIG. 8, that is, the hot wire side conductors 35R to 35N (see FIG. 9; see below) of the test plug 30 (see FIG. 9; the same applies hereinafter). The same) and non-live wire side conductors 45R to 45N (see FIG. 9; the same shall apply hereinafter), respectively, and a test voltage / current is applied to each of the live wire side conductors 35R to 35N and the non-live wire side conductors 45R to 45N. It is configured so that it can be supplied. For this reason, the test plug connection part 1 is in contact with the hot-wire side contact parts 1R, 1W, 1B, 1N and the non-hot-wire side conductors 21 that can be brought into contact with the live-line conductors 11 of the respective phases. It has contact parts 1'R, 1'W, 1'B, 1'N.

  The display unit 2 includes a first light emitting unit 2A, a second light emitting unit 2B, a third light emitting unit 2C, and a fourth light emitting unit 2D. Among these, the 1st light emission part 2A is made to respond | correspond to hot wire side contact part 1R, 1W, 1B, 1N and non hot line side contact part 1'R, 1'W, 1'B, 1'N, respectively. Arranged. The second light emitting unit 2B includes the corresponding in-phase live line side contact portions 1R, 1W, 1B, 1N and non-live line side contact portions 1′R, 1′W, 1′B, corresponding to the power supply side and the load side. It is configured to represent the state between 1′N. The 3rd light emission part 2C is comprised so that the state between the hot wire side contact parts 1R, 1W, 1B, and 1N adjacent between the phases by the side of a power supply may be represented. The 4th light emission part 2D is comprised so that the state of non-hot-wire side contact part 1'R, 1'W, 1'B, 1'N which adjoins between the phases by the side of a load may be represented. Further, the first to fourth light emitting portions 2A to 2D can be preferably configured with liquid crystals.

  The insulation detection unit 3 is an interphase insulation resistance that is an insulation resistance between each of the live wire side conductors 35R to 35N and each of the non-live wire side conductors 45R to 45N in a state where the test plug 30 is connected to the test plug connection unit 1. In addition, an insulation resistance signal S4 is detected when the inter-pole insulation resistance, which is the insulation resistance between the live wire side conductors 35R to 35N and between the non-live wire side conductors 45R to 45N, is detected. Send it out. A specific configuration of the insulation detection unit 3 will be described later.

  When the insulation abnormality signal S4 is input, the light emission control unit 4 controls the light emission state of the display unit 2 so as to display the insulation abnormality. At the same time, the light emission control unit 4 is connected to the test plug connection unit 1 based on each test mode to be described later, and the hot wire side conductors 35R to 35N and the non-hot wire side conductors 45R of the same phase. To 45N, between the live conductors 35R to 35N adjacent on the power supply side, and between the non-hot live conductors 45R to 45N adjacent on the load side to detect the respective conduction states. Then, the light emission state of the display unit 2 is controlled so as to display this detection state.

  Here, the test mode will be described with reference to FIG. FIGS. 2A to 2D show display modes of the display unit 2 in a normal state corresponding to the first to fourth modes, respectively. In the figure, the halftone dot portion is lit.

  The first mode shown in FIG. 2A is a mode for confirming the soundness of the display unit 2 prior to a predetermined test. The non-live line side contact parts 1′R to 1′N and each active part are displayed. The line side contact portions 1R, 1W, 1B, and 1N are selected by pressing the power button switch 8 in a state where the line side contact portions 1R, 1W, 1B, and 1N are short-circuited by a predetermined jig (for example, the short-circuit cap 16 shown in FIG. 3). When all of the first to fourth light emitting units 2A are turned on by pressing the power button switch 8, it can be determined that the display unit 2 is healthy. Is configured to be determined to be defective.

  The second mode shown in FIG. 2B is selected by the second mode selection signal S2 by pressing the mode selection button 9. This second mode is a mode for detecting continuity between each of the live-line conductors 35R to 35N and the non-live-line conductors 45R to 45N of the same phase, and between the terminals 37 and 47 of the test plug 30. The test plug 30 is inserted into the test terminal 5 (see FIG. 8; the same applies hereinafter) with the U-shaped conduction angle (not shown) connected (see FIG. 9; the same applies hereinafter), and the voltage of the PT circuit is set. This is a test performed prior to measurement. In this second mode, as shown in FIG. 2B, when each first light emitting unit 2A and each second light emitting unit 2B are turned on, each of the live wire side conductors 35R to 35N and each It can be determined that conduction between the non-hot-wire-side conductors 45R to 45N is normally ensured, and when there is the second light emitting unit 2B that does not light up, it can be determined that the portion is defective. .

  The third mode shown in FIG. 2C is selected by pressing the mode selection button 9 by the third mode selection signal S3. This third mode is a mode for detecting continuity between adjacent live wire side conductors 35R to 35N, and prevents the secondary side of current transformers 51R to 51B (see FIG. 7) from being opened. Prior to the case where the live wire side conductors 35R to 35N of the plug 30 are short-circuited by a short-circuit piece 38 (see FIG. 9; the same applies hereinafter) and current is supplied to the load via the non-live wire side conductors 45R to 45N. It is a test. In this third mode, as shown in FIG. 2 (c), when the first light emitting units 2A and the third light emitting units 2C are lit, there is a gap between the live conductors 35R to 35N. If the third light emitting unit 2C that does not light up can be determined to be normally conducted, it can be determined that the portion is defective.

  The fourth mode shown in FIG. 2D is a mode for detecting interphase and interelectrode insulation resistance, and is a mode for performing a test for detecting the soundness of the interphase and interelectrode insulation resistance. In the fourth mode, as shown in FIG. 2D, when all the first to fourth light emitting units 2A to 2D are not turned on, the interphase and interpolar insulation resistance of the test plug 30 is normal. If any part of the insulation resistance is defective, all of the first to fourth light emitting units 4A to 4D are turned on. Can be determined to be defective. Here, when a defect in insulation resistance is detected in the fourth mode, all of the first to fourth light emitting units 4A to 4D emit light. It is necessary to distinguish from the light emitting units 4A to 4D. Such distinction can be easily realized by blinking the light emitting units 4A to 4D when an insulation failure is detected in the fourth mode.

  FIG. 3 is a perspective view showing the appearance of the test apparatus according to this embodiment together with a test plug. As shown in the figure, the test plug connecting portion 1 in this embodiment has a first claw member 13 that extends forward from a main body 12 that is a casing and is bent, and a base end on the main body 12 via a hinge portion 15. And a second claw member 14 that is supported so as to be rotatable and is extended and bent forward. Here, the first claw member 13 is entirely composed of an insulating member, but each tip end surface has a non-live line side contact portion 1′R to 1′N (a conductive portion) (see FIG. 3). (Not shown) is fixed, and is in contact with the non-live line side conductors 45R to 45N of the respective phases via the non-live line side contact portions 1′R to 1′N. Similarly, the second claw member 14 is also made of an insulating member as a whole, but the live wire side contact portions 1R to 1N, which are conductive portions, are fixed to the respective front end surfaces, and each live wire side. Each phase contacts the hot wire conductors 35R to 35N via the contact portions 1R to 1N.

  The display unit 2, the power button switch 8 and the mode selection button 9 are arranged on the surface of the main body 12. Moreover, between the 1st nail | claw member 13 and the 2nd nail | claw member 14, it contacts the non-hot-wire side contact part 1'R thru | or 1'N and the live-line side contact part 1R thru | or 1N, and short-circuits the whole. A short-circuit cap 16 formed of a conductive member 16a is engaged. In this state, if the power button switch 8 is pressed, the soundness of the display unit 2 can be checked. In addition, an insulating wall 16b is provided around the conductive member 16a so as to surround the periphery with an insulator for preventing electric shock.

  In this embodiment, the second claw member 14 is rotated as indicated by the alternate long and short dash line in the drawing with the hinge portion 15 as the rotation center, and the tip portion is opened. By holding the live wire side conductors 45R to 45N and the live wire side conductors 35R to 35N between the first claw member 13 and the second claw member 14, preparation for a predetermined inspection of the test plug 30 is completed.

  FIG. 4 is a circuit diagram showing a detailed configuration of the display unit of the test apparatus according to the present embodiment. In FIG. 4, each light emitting part 2A, 2B, 2C, 2D is a part shown with a halftone dot, and is formed of liquid crystal. Here, the first light emitting part 2A represents the R phase, W phase, B phase, and N phase on the non-live line side contact parts 1′R to 1′N side in order from the left side of the upper stage in FIG. The R-phase, W-phase, B-phase, and N-phase on the hot wire side contact portions 1R to 1N are shown in order from the left side of the lower stage. The second light-emitting portion 2B includes R-phase, W-phase, B-phase, and N-phase non-hot-wire side contact portions 1′R, 1′W, 1′B, 1′N and a live-wire-side contact portion 1R in order from the left side. , 1W, 1B, 1N. Similarly, the third light emitting unit 2C and the fourth light emitting unit 2D are arranged in order from the left side on the live side contact portions 1R to 1N side between the R phase and the W phase, between the WB phase, between the BN phase, and the non-live line. It represents that it is between the R phase-W phase, the WB phase, and the BN phase on the side contact portions 1′R to 1′N side.

  The first to fourth light emitting units 2A to 2D are selectively turned on by closing the a contacts a1 to a18. Therefore, the display state of the display unit 2 in each mode as shown in FIG. 2 can be constructed by appropriately controlling the opening and closing of the a contacts a1 to a18 by a contact control unit (not shown) of the light emission control unit 4. .

  FIG. 5 is a circuit diagram showing a detailed configuration of the light emission control unit in the test apparatus according to the present embodiment. In the first mode shown in FIG. 2 (a), the power button switch 8 is pressed. As a result, the relay R0 is connected to the power source 18, and as a result, the relay R0 is energized. In this case, all a contacts a1 to a18 in FIG. 4 are closed via a contact control unit (not shown). Therefore, the display is as shown in FIG. On the other hand, if there is a light emitting part 2A to 2D that is not lit, it can be visually recognized that a defect of the display part 2 occurs in that part.

  In the second mode shown in FIG. 2B, the live wire side conductors 35R to 35N and the non-live wire side conductors 45R to 45N of the test plug 30 are provided between the first claw member 13 and the second claw member 14. The second mode selection signal S2 is sent by operating the mode selection button 9 while holding the button. Here, since the power source side and the load side are connected by the U-shaped metal between the terminals 37 and 47 of the test plug 30, the contact point a20 is closed by the second mode selection signal S2 and the other. When the contacts a21 to a24 are closed by the control from, the relays R1 to R4 operate when the in-phase power supply side and the load side are connected as prescribed. As a result, the a contacts a1 to a18 are selectively closed via the contact control unit, and a display as shown in FIG. On the other hand, when the power supply side and the load side are not connected for some reason, the corresponding phase relays R1 to R4 do not operate. Therefore, the defective portion can be visually recognized by not causing any of the light emitting portions 2B to emit light in order to reflect this state.

  In the third mode shown in FIG. 2C, the mode selection button 9 is in a state where the live conductors 35R to 35N of the test plug 30 are held between the first claw member 13 and the second claw member 14. The third mode selection signal S3 is sent out by the above operation. In the third mode, the terminals 47 on the power supply side of the test plug 30 are short-circuited by the short-circuit piece 38. Therefore, the contact a30 is closed by the third mode selection signal S3, and the opening and closing of each contact is controlled by the following control from others.

1) The contact a24 is closed. At this time, if the relay R4 operates, it is normal and the display unit 2 is lit as shown in FIG.
2) When the relay R4 does not operate in 1), the contact a22 is closed. As a result, if the relay R2 operates, the contact between the hot wire side contact portions 1R and 1W is normal.
3) After the relay R2 is operated in 2), the contact a23 is closed. As a result, if the relay R3 is operated, the contact between the live wire side contact portions 1W and 1B is normal. Therefore, the hot wire side contact portions 1B and 1N are abnormal.
4) When the relay R2 does not operate in 2), between the live wire side contact portions 1R and 1W is abnormal, but between the live wire side contact portions 1W and 1B and the live wire side contact portions 1B and 1N Normal or abnormal is unknown. Therefore, the state between the live wire side contact portions 1W and 1B and the live wire side contact portions 1B and 1N is detected by the following two procedures.
5) When the contacts a31 and a23 are closed, if the relay R3 operates, the hot-wire side contact portions 1W and 1B are normal, and otherwise are abnormal.
6) When the contacts a31, a32, and a24 are closed, if the relay R4 operates, the hot-wire side contact portions 1B, 1N are normal, otherwise they are abnormal.
7) The contact point control unit controls the lighting of the light emitting units 2A and 2C based on the processing results of 1) to 6). As a result, when everything is normal, the display is as shown in FIG. On the other hand, since the light emitting unit 2C corresponding to the defective portion is not turned on, the defective portion can be visually recognized.

  In the fourth mode shown in FIG. 2 (d), the hot-wire side conductors 35R to 35N of the test plug 30 are held between the first claw member 13 and the second claw member 14. When the insulation resistance is smaller than the set value, the contact a40 is closed by the insulation abnormality signal S4. At this time, if the contact a40 is formed of a contact of a flicker relay, the relay R0 can be flickered. As a result, all the light emitting portions 2A to 2D blink, and it is possible to warn that there is a defective insulation portion. On the other hand, when sufficient insulation resistance is ensured, all of the light emitting portions 2A to 2D do not emit light.

  Here, the second mode to the fourth mode automatically transition. Therefore, it is only necessary to visually check whether the state of the display unit 2 is a healthy display unit 2 as shown in FIGS. 2B to 2D corresponding to the test being performed.

  FIG. 6 is an explanatory diagram conceptually illustrating a specific configuration example of the insulation detection unit in the test apparatus according to the present embodiment. Insulation detection unit 3 in this embodiment includes hot-wire side contact portions 1R, 1W, 1B, and 1N and non-hot-wire side contact portions 1′R, 1′W, 1′B, and 1′N between adjacent different phases. Are different poles, and at the same time, the hot-wire side contact portions 1R, 1W, 1B, 1N and the non-hot-wire side contact portions 1'R, 1'W, 1'B, 1 'facing each other in the same phase N has a pair of measuring terminals 19 and 20 connected to the hot wire side contact portions 1R, 1W, 1B, and 1N and the non-hot wire side conductors 45R, 45W, 45B, and 45N so that N is a different pole. is doing. Such a connection state has a structure that can be realized by switching of the switch means (not shown).

  More specifically, the measurement terminal 19 serving as the positive electrode is connected to the live-line-side contact portions 1W and 1N and the non-hot-wire-side contact units 1′R and 1′B, respectively. The terminal 20 is connected to the hot wire side contact portions 1R, 1B and the non-hot wire side contact portions 1'W, 1'N, respectively. As a result, the hot-wire side contact portions 1R, 1W, 1B, and 1N and the non-hot-wire side contact portions 1′R, 1′W, 1′B, and 1′N between different adjacent phases are different poles. At the same time, the hot-wire-side contact portion 1R and the non-hot-wire-side contact portion 1′R, the hot-wire-side contact portion 1W and the non-hot-wire-side contact portion 1′W, and the hot-wire-side contact portion that face each other in the same phase. 1B and the non-hot-wire side contact portion 1′B, and the live-wire-side contact portion 1N and the non-hot-wire side contact portion 1′N are different poles. That is, the hot-wire side contact portions 1W and 1N and the non-hot-wire side contact portions 1′R and 1′B that become the positive poles, and the live-wire-side contact portions 1R and 1B and the non-hot-wire side contact portions 1 that become the negative poles. 'W and 1'N are arranged in a staggered pattern on the power supply side and the load side.

  As a result, when a predetermined high voltage is applied between the measurement terminals 19 and 20 with a mega, the first and second claw members 13 are connected between different phases or the same phase as shown by the dotted line in the figure. , 14 between the live wire side conductors 35R, 35W, 35B, 35N of the test plug 30 and between the non-live wire side conductors 45R, 45W, 45B, 45N and the opposed live wire side conductors 35R, 35W, 35B, A predetermined high voltage is applied between 35N and the non-live wire side conductors 45R, 45W, 45B, 45N. As a result, a predetermined insulation resistance can be measured at a time. As a result, if there is no abnormality in the insulation resistance, the contact point a40 in FIG. 5 remains open, and the display unit 2 does not emit light. The light emitting units 2A to 2D blink only when the contact a40 is closed only when an abnormality occurs.

  The insulation measurement is performed immediately after the first mode self-check is completed and prior to the second to third mode inspections.

  INDUSTRIAL APPLICABILITY The present invention can be used in an industrial field in which electric power equipment is manufactured and sold, and an industrial field in which electric power equipment is maintained and inspected.

1 is a block diagram showing an entire test plug testing apparatus according to an embodiment of the present invention. It is explanatory drawing which shows the display mode of the display part of the test apparatus shown in FIG. 1 for every mode. It is a perspective view which shows the external appearance of the test apparatus shown in FIG. 1 with a test plug. It is a circuit diagram which shows the detailed structure of the display part of the test apparatus shown in FIG. It is a circuit diagram which shows the detailed structure of the light emission control part in the test apparatus shown in FIG. It is explanatory drawing which shows notionally the specific structural example of the insulation detection part in the test apparatus shown in FIG. It is a circuit diagram which shows the protection system of the electric power system which has an insertion type test plug and a test terminal. It is a longitudinal cross-sectional view which shows a test terminal. It is a perspective view which shows a test plug.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Test plug connection part 1R, 1W, 1B, 1N Hot wire side contact part 1'R, 1'W, 1'B, 1'N Non hot line side contact part 2 Display part 2A thru | or 2D Light emission part 3 Insulation detection part 4 Light emission control unit 8 Power button switch 9 Mode selection button 12 Main body 13 First claw member 14 Second claw member 15 Hinge unit

Claims (4)

A live conductor that contacts each of a plurality of power supply side conductors of the test terminal connected to each phase on the power supply side and a non-contact that contacts each of the same number of load side conductors of the test terminal connected to each phase on the load side A test device for a test plug in which a live wire side conductor is disposed on each surface of the insulating member facing each other for each phase,
A test plug connection portion having a live wire side contact portion that can be brought into contact with each of the live wire side conductors and a non-hot wire side contact portion that can be brought into contact with each non-live wire side conductor;
The first light-emitting part disposed corresponding to the live-line-side contact part and the non-hot-line-side contact part, the respective live-line-side contact parts and the non-hot-line side corresponding to the same phase on the power supply side and the load side A second light emitting unit configured to represent a state between the contact parts, a third light emitting unit configured to represent a state between the adjacent live line side contact units between the phases on the power supply side, and the load side Display means having a fourth light emitting portion configured to represent a state between the non-hot-wire side contact portions adjacent to each other;
In a state where the test plug is connected to the test plug connecting portion, an interphase insulation resistance that is an insulation resistance between each of the live wire side conductors and each of the non-live wire side conductors, and between each of the live wire side conductors And an insulation detection means for detecting an insulation resistance between the electrodes, which is an insulation resistance between the non-live conductors, and sending an insulation abnormality signal when these are abnormal,
When the insulation abnormality signal is input, the light emission state of the display means is controlled so as to display that the insulation abnormality is present, and the test plug is connected to the test plug connection portion, and the respective phases of the same phase are displayed. Supply current between a live wire side conductor and each non-live wire side conductor, between each live wire side conductor adjacent on the power supply side, and between each non-live wire side conductor adjacent on the load side. A test plug testing apparatus comprising: a light emission control means for detecting each conduction state and controlling the light emission state of the display means so as to display the detection state. The test plug test apparatus according to claim 1,
The test plug connection part is
The hot-wire-side contact portion or the non-hot-wire-side contact portion is respectively formed on the front end surface that is bent forward and bent from the main body, which is a housing, so as to come into contact with the live-wire-side conductor or non-hot-wire-side conductor of each phase, respectively. A first claw member having
The non-hot-wire side contact is made to the front end surface that is pivotally supported by the main body so as to be in contact with the non-hot-wire-side conductor or the hot-wire-side conductor of each phase and is extended and bent forward. And a second claw member each having a hot wire side contact portion. In the test plug test apparatus according to claim 1 or 2,
A test plug testing apparatus, wherein the first to fourth light emitting portions in the display means are composed of liquid crystals. In the test plug test apparatus according to any one of claims 1 to 3,
The insulation detection means includes
The live wire side contact portions and the load side conductors in adjacent different phases become different poles, and at the same time, the live wire side contact portions and the load side conductors facing each other in the same phase are different. A test plug testing apparatus comprising a pair of measurement terminals respectively connected to the power supply side contact portion and the load side contact portion so as to be poles.

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