JP2001231153A - Ct test plug-testing device for protection relay board and pt test plug-testing device for protection relay board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably reduce the number of times for inspection and required time, and at the same time to extremely improve inspection accuracy. SOLUTION: In the inside of a plug accommodation case 21 where primary-side contact terminals A to O, and secondary-side ones A to O of a CT test plug 10A can be inserted from a plug insertion port 22, primary-side contacts A1 to O1 and secondary-side ones a1 to o1 corresponding to contact terminals A to O and (a) to (o), respectively, and an inspection circuit 23 are provided. At the same time, in the outside of the plug accommodation case 21, a switch SW1, a tester 24 for measuring a resistance value, and an operation switch PSW are provided. In this case, the switch SW1 that is included in the inspection circuit 23, and changes an inspection state for confirming the non-continuity between the primary-side terminals A to O and the secondary-side ones (a) to (o) to a second inspection state for confirming the conformity/non-conformity of the continuity state between the primary-side contact terminals A to O that are mutually connected, the tester 24 for resistance value measurement that judges the conformity/non-conformity of the non-continuity and continuity state, and the operation switch PSW that turns on and off the operation of the inspection circuit 23, are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the inspection of a protective relay panel (hereinafter referred to as a relay panel) installed in a substation or various industrial plants and the like, in which a device side (primary side) and a relay panel are inspected. Contact between a relay panel CT test plug (hereinafter, referred to as a CT test plug) and a relay panel PT test plug (hereinafter, referred to as a PT test plug), which are used to electrically disconnect the side (secondary side). The present invention relates to a CT test plug test device and a PT test plug test device that determine and confirm the quality of conduction between terminals and non-conduction between open terminals.

[0002]

2. Description of the Related Art As described above, there are two types of test plugs, a CT test plug and a PT test plug, and there are two types, such as a two-point type, a four-point type, and an eight-point type, depending on the number of contact terminals.
8 to 10 show a front view, a side view, and a plan view of an example of a four-point CT test plug. The four-point CT test plug 10A is opposed to each other with an insulator 11 interposed therebetween. The two primary contact terminals A, B, C, O and the secondary contact terminals a, b, c, o protrude from the test plug main body 12, and the primary contact terminals A to O are connected to the test plug main body 12. The terminals 14A to 14O are electrically connected to each other via a connection piece 13 attached by tightening the terminals.

A four-point CT test plug 10 as described above
A, when performing the inspection work of the relay panel, as shown in FIG. 11, by inserting the respective contact terminals A to O and a to o into the socket 15 provided in the relay panel 14, the primary side is connected to the primary side. C in normal operation by electrically disconnecting the
The current flow from T to the relay panel 14 as shown by the arrow a is switched to the current flow as shown by the arrow b, thereby using the relay panel 14 to ensure safety during inspection work. It is.

As described above, since the inspection work of the relay panel 14 is performed without stopping the main circuit and in a live state, it is extremely difficult to check the quality of the CT test plug 10A in order to ensure the safety of the work. is important. If the primary contact terminals A ~
There is an abnormality in the conduction state between O and the non-conduction state between the open terminals of the primary contact terminals A to O and the secondary contact terminals a to C.
When the T test plug 10 is used, there is a possibility that a serious accident such as a power supply trouble due to a malfunction of the relay, a breakage of equipment, a human disaster or the like may be caused.

Therefore, when using the test plug,
Prior to its actual use, a conduction and non-conductivity confirmation inspection (test) is indispensable. By the way, it is not possible to accurately judge the internal damage state or the presence / absence of an abnormality only by looking at the external appearance of the test plug. For this reason, conventionally, generally, FIG.
As shown in FIG. 1, the operator uses the tester 16 to press the tester measurement terminal 17 into contact with the conductive portions (primary contact terminals A to O and secondary contact terminals a to o) of the test plug 10A. Inspection work such as reading 16 pointers was performed. Up to this point, the 4-point CT
Although the test plugs have been described as examples, the 4-point PT test plug and the 8-point CT test plug are only partially different in their configuration. It is almost the same as the case of the four-point CT test plug.

[0006]

However, in the conventional inspection operation as described above, if the conductive portion of the test plug is deformed and deformed, the contact force of the tester measuring terminal 17 against the conductive portion varies. Or the contact terminal 17 is separated from the conductive part due to the movement of the line of sight for reading the pointer of the tester 16, and thus an erroneous determination is easily made.

[0007] In addition, the conduction between the phases (between the primary contact terminals) was confirmed for each of the four-point CT test plugs.
10 times in total, 4 times by non-conductivity confirmation between the times and poles (between the primary side contact terminal and the secondary side contact terminal), and in the case of a four-point PT test plug, also 10 times in total, 8 points each In the case of the expression CT test plug, it is necessary to check the conduction between the phases 28 times for each plug, and to check the non-conduction between the poles eight times, for a total of 36 tests. Inspection work of one relay panel requires the use of a plurality of test plugs. For example, when it is necessary to use two 4-point PT test plugs and 16 4-point CT test plugs, The total number of inspections reaches 180, and not only does the inspection work require enormous amount of time and labor, but it is also easy to make mistakes due to repetition of the same operation, and the inspection accuracy itself deteriorates, leading to a decrease in reliability. Was.

[0008] The present invention has been made in view of the above circumstances, and a CT capable of achieving an improvement in inspection accuracy while significantly reducing the number of inspections and the required time.
It is an object to provide a test plug test device and a PT test plug test device.

[0009]

In order to achieve the above object, a CT test plug testing apparatus according to the present invention provides a plug capable of inserting a plurality of primary contact terminals and secondary contact terminals in a CT test plug. In the inside of the plug storage case having the insertion port, the CT inserted into the case is inserted.
A plurality of primary contacts and secondary contacts that can be electrically connected to the respective contact terminals of the test plug, and an inspection circuit that connects the primary contacts and the secondary contacts are provided, and the plug housing is provided. Outside the case, a first inspection state interposed in the inspection circuit and detecting at least the presence or absence of a short circuit between the primary contact terminal and the secondary contact terminal to confirm non-conduction, and the primary contact terminal An inspection state changeover switch capable of switching to a second inspection state for detecting a contact resistance value between contact terminals connected to each other in advance to check whether the conduction state is good or not, and whether the non-conduction state and the conduction state are good or bad; And an operation switch for turning on and off the operation of the inspection circuit.

According to the present invention having the above-described structure, after the CT test plug is inserted into the plug storage case of the test apparatus, the operation switch is turned on, and then the one-touch operation of sequentially switching the inspection state switch is performed. A test for detecting non-conduction by detecting the presence or absence of a short circuit between the primary contact terminal and the secondary contact terminal in at least the CT test plug, and between the contact terminals that are previously connected to each other among the primary contact terminals. And a second inspection for detecting the contact resistance value of the first and second inspections to confirm whether the conduction state is good or not, and the inspection result can be displayed externally, and the number of inspections and the required time can be significantly reduced. Inspection work itself is very simple and easy, there is no difference in accuracy level due to differences in experience, and inspection with high accuracy and reliability Playable.

Further, the PT test plug testing apparatus according to the present invention provides a PT test plug test apparatus in which a plurality of primary contact terminals and secondary contact terminals of a PT test plug are inserted into a plug storage case having a plug insertion opening. A plurality of primary contacts and secondary contacts that can be electrically connected to the respective contact terminals of the PT test plug inserted into the case, and the primary contact and the secondary contact are shifted in phase to reduce resistance. To detect the presence or absence of a short circuit between the primary contact terminal and the secondary contact terminal of the PT test plug, and the presence or absence of a short circuit between the adjacent terminals of the primary and secondary contact terminals. An inspection circuit capable of checking the quality of non-conduction between the phases is provided, and the inspection result of the non-conduction state is displayed outside the plug storage case through the inspection circuit. It is characterized in that the stage, and an operation switch for turning on and off the operation of the inspection circuit is provided.

According to the present invention having the above-described structure, after the PT test plug is inserted into the plug storage case of the test apparatus, the one-touch operation such as turning on the operation switch is performed, and the primary contact terminal of the PT test plug is operated. A check is performed to detect the presence or absence of a short circuit between the terminal and the secondary contact terminal and the presence or absence of a short circuit between the adjacent terminals of the primary and secondary contact terminals, and to confirm the quality of non-conductivity between the poles and phases. , The inspection results can be displayed externally, and the number of inspections and the required time can be significantly reduced.
The inspection work itself is very simple and easy, there is no difference in accuracy level due to differences in experience, and anyone can perform an inspection with high accuracy and reliability.

In the above-mentioned CT test plug test apparatus and PT test plug test apparatus, a tester for measuring a resistance value or a set value is compared with a detected value as an inspection result display means, and whether or not the difference between the two is within an allowable range is determined. May be adopted, and any of means for displaying the result of the judgment by lighting or a buzzer may be employed.In particular, according to the latter means, there is no erroneous judgment due to a reading error of the pointer of the tester, and in terms of inspection accuracy. More effective.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a four-point CT test plug test apparatus 20A which is a first embodiment of a CT test plug test apparatus according to the present invention. FIG. 2A is an internal circuit diagram, and FIG. Certain 4-point CT test plug 1
It is a side view of OA.

In FIG. 1, reference numeral 21 denotes a plug storage case, and primary contact terminals A to O of a four-point CT test plug 10A as shown in FIGS. A plug insertion port 22 into which secondary contact terminals a to o can be inserted, and a four-point CT test plug inserted into the case 21 as shown in FIG. Primary contact A1 that can be electrically connected to each of the contact terminals A to O and a to o of 10A
To O1 and secondary contacts a1 to o1, and an inspection circuit 23 for connecting the primary contacts A1 to O1 and the secondary contacts a1 to o1.

The inspection circuit 23 includes a primary contact terminal A
A first inspection state in which non-conduction is confirmed by detecting the presence / absence of a short circuit between 接触 O and the secondary contact terminals a to o (between poles) and a primary contact terminal A that is conductively connected via the connection piece 13. It is possible to sequentially switch between a second inspection state in which the state of conduction is confirmed by detecting a contact resistance value between ＯO (interphase) and a third inspection state in which the presence or absence of disconnection of the internal wiring of the test plug 10A is confirmed. 4
An inspection state changeover switch SW1 having a contact point, a resistance value measurement tester 24 for measuring the non-conductivity, the quality of the conduction state, the presence / absence of disconnection, and the like as a contact resistance value, and the operation of the inspection circuit 23 on / off. An operation switch PSW is interposed.

On the outside (upper surface) of the plug storage case 21, a snap operation piece 25 of the inspection state changeover switch SW1, a push button type operation part 26 of the operation switch PSW, and the resistance value measurement tester 24 are provided. A signal lamp 27 is provided, which compares a resistance detection value obtained from the above with a preset resistance setting value to determine whether the difference between the two values is within an allowable range and switches the lighting state.

Next, the four-point CT constructed as described above is used.
A test (inspection) procedure by the test plug test device 20A will be described. The four-point CT test plug 10A, which is an inspection product, is inserted into the plug storage case 2 through the plug insertion port 22.
1 and stored therein, and a predetermined inspection is performed in the following order. (1) The inspection state switch SW1 is a contact SW1-1.
By turning on the operation switch PSW in the state of, it is confirmed that the tester 24 is at 0Ω. (2) By measuring the resistance value at the position of the contact SW1-1 via the tester 24, the primary contact terminals A to O are measured.
The non-conduction is confirmed by detecting the presence or absence of a short circuit between the secondary contact terminals a to o (between poles). This non-conduction is caused by signal lamp 2
Confirm by the lighting state of 7. (3) Next, the inspection state switch SW1 is set to the contact SW.
By switching the position to the position 1-2 and measuring the contact resistance value via the tester 24, the quality of the conduction state between the primary contact terminals A to O (interphase) conductively connected via the connection piece 13 is determined. Also, it is confirmed whether or not there is a fastening failure of the connection piece 13 by the extraction terminals 14A to 140. This confirmation can also be determined at a glance by turning on and off the signal lamp 27. (4) Further, the inspection state changeover switch SW1 is set to the contact S
By switching to the position of W1-3 or SW1-4 and measuring the resistance value via the tester 24, as shown in FIG. 3, each contact terminal A in the CT test plug 10A
To O, a to o, and corresponding extraction terminals 14A to 14A
The presence or absence of disconnection (x mark) of the internal connection lines 28A and 28a between 4O and 14a to 14o is checked.

FIG. 4 shows a four-point zero-phase CT test plug test apparatus 20B which is a second embodiment of the CT test plug test apparatus according to the present invention, and FIG.
(B) is a side view of the four-point zero-phase CT test plug 10B. Note that the four-point zero-phase CT test plug test device 20B is almost the same as the appearance of the four-point CT test plug test device 20A shown in FIG.
The description of the external view is omitted.

The four-point zero-phase CT test plug 10B, which is an inspection product of the four-point zero-phase zero-phase CT test plug test apparatus 20B of the second embodiment, has a primary contact terminal as shown in FIG. Of A to O, AB and CO are connected to connection pieces 13.
Conduction connection is made through A and 13B, and non-conduction is established between B and C.

On the other hand, the four-point zero-phase CT test plug test apparatus 20B includes a primary side contact terminal A
The first inspection state in which non-conductivity is confirmed by detecting the presence or absence of a short circuit between O to O and the secondary contact terminals a to o (between poles) and the presence or absence of a short circuit between the primary contact terminals B and C (between phases). A second inspection state for detecting non-conduction and detecting a contact resistance value between the primary contact terminals AB and CO (interphase) electrically connected via the connection pieces 13A and 13B. A third check is made to determine whether the conduction state is good or not, and whether there is any failure in fastening the connection pieces 13A and 13B by the extraction terminals 14A to 14B and 14C to 140.
A two-contact inspection state switch SW1 and an on / off switch SW2 that can be sequentially switched to an inspection state;
A resistance value measurement tester 24 for measuring the non-conductivity, the state of conduction, the presence or absence of disconnection, and the like as a contact resistance value, and an operation switch PS for turning on and off the operation of the inspection circuit 23.
W is interposed.

Next, a test (inspection) by the 4-point type zero-phase CT test plug test apparatus 20A configured as described above.
The procedure will be described. 4-point zero-phase CT for inspection
The test plug 10B is inserted and stored in the plug storage case 21 through the plug insertion port 22, and a predetermined inspection is performed in the following order. (1) The inspection state switch SW1 is a contact SW1-1.
By turning on the operation switch PSW in the state of, it is confirmed that the tester 24 is at 0Ω. (2) Next, the switch SW2 is turned on, and the resistance value is measured via the tester 24 in a state where the changeover switch SW1 is at the position of the contact point SW1-1, so that the primary side contact terminals A to O and the secondary side are measured. The non-conduction is confirmed by detecting the presence or absence of a short circuit between the contact terminals a to o (between poles). This non-conduction is confirmed by the lighting state of the signal lamp 27. (3) Next, the switch SW2 is turned off, the switch SW1 is switched to the position of the contact SW1-2, and the resistance value is measured via the tester 24, so that the primary contact terminals BC are connected (interphase). The presence or absence of a short circuit is detected to confirm non-conduction. This non-conduction is confirmed by the lighting state of the signal lamp 27. (4) Further, by turning on the switch SW2 while keeping the changeover switch SW1 at the position of the contact point SW-2, the primary contact terminals AB which are conductively connected via the connection pieces 13A and 13B. Between the terminals C and CO (between the phases) and the extraction terminals 14A-14
B, Check whether there is any fastening failure of the connection pieces 13A, 13B by 14C-14O. This confirmation can also be determined at a glance by the lighting state of the signal lamp 27.

FIG. 5 shows an eight-point CT test plug test apparatus 20C which is a third embodiment of the CT test plug test apparatus according to the present invention. FIG. 5 (a) is an internal circuit diagram, and FIG.
It is a side view of 10C of point type CT test plugs. Note that this 8-point CT test plug test apparatus 2CB is used in the first embodiment.
4-A CT test plug test apparatus 20A shown in FIG.
Since the appearance is almost the same, the description of the appearance is omitted.

An 8-point CT test plug 1 which is an inspection product by the 8-point CT test plug test apparatus 20C of the third embodiment.
0C is the primary contact terminal A, A as shown in FIG.
A to A ', BB', CC 'and OO' among the pieces 'A to O and O' are referred to as connecting pieces 13A, 13B, and 13C, respectively.
Conductively connected through 130, between A'-B, between B'-C,
The portions between C 'and O are non-conductive.

On the other hand, an 8-point CT test plug test apparatus 2
When the OC test plug 10C is inserted into the plug insertion case 21, the OC contacts the primary contact terminals A, A ′ to O, O ′ and the secondary contact terminals a,
Primary contacts A1, A1 'to O1, O1' and secondary contacts a1, a which can be electrically connected to a 'to o, o', respectively.
1'-o1, o1 'and these primary side contacts A1, A1'
To O1, O1 'and secondary side contacts a1, a1' to o1, o1
And an inspection circuit 23 is provided for connection with the '.

The inspection circuit 23 includes primary contact terminals A,
A first method for detecting non-conduction by detecting the presence or absence of a short circuit between A 'to O, O' and the secondary contact terminals a, a 'to o, o' (between poles).
Inspection state and primary side contact terminals A'-B, B'-C, C'-
A second inspection state in which the presence / absence of a short circuit between O (between phases) is detected by comparing with the resistance R to confirm non-conduction, and the connection pieces 13A,
The contact state between the primary-side contact terminals AA ′, BB ′, CC ′, and OO ′ (between phases) that are conductively connected via 3B and 13C is detected, and the conductive state is established. Pass / fail terminals 14A-14A ', 14B-14-B', 14C-
Connection pieces 13A, 13 by 14C ', 14O-14O'
A two-contact type inspection state changeover switch SW1 which can be sequentially switched to a third inspection state for confirming whether or not there is a tightening failure of B and 13C, and three on / off type switches SW2 interlocked with each other; A resistance value measuring tester 24 for measuring the quality of the conduction state and the presence / absence of disconnection as a contact resistance value, and an operation switch PSW for turning on / off the operation of the inspection circuit 23 are provided.

Next, the 8-point CT constructed as described above is used.
A test (inspection) procedure by the test plug test device 20C will be described. Insert the 8-point CT test plug 10C, which is the inspection product, through the plug insertion port 22 into the plug storage case 2.
1 and stored therein, and a predetermined inspection is performed in the following order. (1) The inspection state switch SW1 is a contact SW1-1.
By turning on the operation switch PSW in the state of, it is confirmed that the tester 24 is at 0Ω. (2) Next, the three switches SW2 are turned on, and the resistance value is measured via the tester 24 in a state where the changeover switch SW1 is at the position of the contact point SW1-1. O, O 'and the secondary contact terminals a,
The non-conduction is confirmed by detecting the presence / absence of a short circuit between a 'to o, o' (between poles). This non-conduction is confirmed by the lighting state of the signal lamp 27. (3) Next, the three switches SW2 are turned off, the changeover switch SW1 is switched to the position of the contact SW1-2, and the resistance is measured via the tester 24 to determine whether the measured value is 3RΩ. Whether the primary side contact terminal A '
Non-conduction is confirmed by detecting the presence or absence of a short circuit between -B, B'-C, and C'-O (between phases). This non-conduction is confirmed by the lighting state of the signal lamp 27. (4) Further, by turning on the switch SW2 while keeping the switch SW1 at the position of the contact SW-2, the primary contact terminal A which is conductively connected via the connection pieces 13A, 13B, 13C. -A ', BB', CC
, And the quality of the conduction state between OO '(between phases) is checked, and the extraction terminals 14A to 14A', 14B to 14B
', 14C-14C', and 14O-14O 'to confirm the presence or absence of a fastening failure of the connection pieces 13A, 13B, 13C. This confirmation can also be determined at a glance by the lighting state of the signal lamp 27.

FIG. 6 shows a four-point PT test plug test apparatus 2 which is an embodiment of a PT test plug test apparatus according to the present invention.
FIG. 7A is an internal circuit diagram, and FIG. 7B is a side view of a four-point PT test plug 10D which is an inspection product.

In FIG. 6, reference numeral 31 denotes a plug storage case, and a four-point P
A plug insertion port 32 into which the primary contact terminals A to O and the secondary contact terminals a to o of the T test plug 10D can be inserted.
As shown in FIG. 7A, contact terminals A to O and a to o of the four-point PT test plug 10D inserted into the case 31 are formed inside the case.
And a test circuit 33 for connecting the primary contacts A1 to O1 and the secondary contacts a1 to o1 which are electrically connectable to the primary contacts A1 to O1 and the secondary contacts a1 to o1. .

As shown in FIG. 7B, the four-point PT test plug 10D, which is an inspection product of the four-point PT test plug test apparatus 20D of this embodiment, has primary contact terminals A to
O and between the poles and phases of the secondary contact terminals a to o are all non-conductive.

As shown in FIG. 7A, the inspection circuit 33 has primary contacts A1 to O1 and secondary contacts a1 to A1.
Six resistors R that connect o1 with their phases shifted from each other, and one resistor R that connects between the secondary contacts a1 and o1 are interposed.
Thus, the presence or absence of a short circuit between the primary contact terminals A to O and the secondary contact terminals a to o of the four-point PT test plug 10D, and the terminals AB and B adjacent to each other on the primary and secondary sides, It is possible to detect the presence or absence of a short circuit between BC, CO, ab, bc, and co to confirm the quality of non-conductivity between the electrodes and between the phases. A resistance measurement tester 34 for measuring the quality of the non-conduction state as a resistance value, and an operation switch PSW for turning on and off the operation of the inspection circuit 33 are interposed.

On the outside (upper surface) of the plug storage case 31, a resistance value measured by a push-button type operation part 36 of the operation switch PSW and a resistance value measured by the resistance value measuring tester 34 and a preset resistance value are set. A signal lamp 37 is provided which compares the values with each other to determine whether the difference between the two values is within an allowable range and switches the lighting state.

Next, the four-point PT constructed as described above is used.
A test (inspection) procedure by the test plug test device 20D will be described. A four-point PT test plug 10D, which is an inspection product, is inserted into the plug storage case 3 through the plug insertion port 32.
1 and stored therein, and a predetermined inspection is performed in the following order. (1) By turning on the operation switch PSW, it is confirmed that the tester 34 is at 0Ω. (2) Next, by measuring the resistance value through the tester 34, the measured resistance value is compared with a preset resistance value, and it is determined whether both values are 7RΩ or not. The presence or absence of a short circuit between the terminals A to O and the secondary contact terminals a to o, and the adjacent terminals AB, BC, CO, ab, and bc on the primary side and the secondary side, respectively. , C-
The presence / absence of a short circuit between o and o is checked to determine the quality of non-conductivity between the electrodes and between the phases. This non-conduction can be confirmed by the lighting state of the signal lamp 37.

[0034]

As described above, according to the present invention, when inspecting a CT test plug, a simple operation such as insertion of a CT test plug into a plug storage case and switching operation is performed. A predetermined test is performed to check the non-conduction between the primary contact terminal and the secondary contact terminal of the plug and to confirm the continuity between the contact terminals of the primary contact terminals that are connected to each other in advance. The result can be displayed externally, and P
To test the T test plug, simply perform a one-touch operation, such as inserting the PT test plug into the plug storage case and turning on the operation switch, and then between the primary contact terminal and the secondary contact terminal of the PT test plug. ) And the non-conductivity between adjacent terminals (phases) of the primary and secondary contact terminals, and the inspection results can be externally displayed.
In each test plug, the number of inspections and the required time can be significantly reduced, and the inspection operation itself is very simple and easy, and there is no difference in accuracy level due to differences in experience. However, an extremely high-precision inspection can be performed, and the reliability of the inspection can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the appearance of a four-point CT test plug test apparatus that is Embodiment 1 of a CT test plug test apparatus according to the present invention.

FIG. 2 (a) is an internal circuit diagram of the above test apparatus,
(B) It is a side view of the four-point type CT test plug which is an inspection product.

FIG. 3 is an explanatory diagram of a state of confirmation of presence / absence of disconnection at the time of an inspection operation by the test apparatus.

FIG. 4A is an internal circuit diagram of a four-point zero-phase CT test plug test apparatus according to a second embodiment of the present invention, and FIG. 4B is a four-point zero-phase test article. FIG. 2 is a side view of a CT test plug for use.

5A is an internal circuit diagram of an 8-point CT test plug test apparatus according to a third embodiment of the present invention, and FIG. 5B is a side view of an 8-point CT test plug as an inspection product. FIG.

FIG. 6 is a schematic perspective view of the appearance of a four-point PT test plug test device which is an embodiment of the PT test plug test device according to the present invention.

FIG. 7A is an internal circuit diagram of the same test apparatus, and FIG. 7B is a side view of a four-point PT test plug as an inspection product.

FIG. 8 is a front view of a four-point CT test plug.

FIG. 9 is a side view of the same four-point CT test plug.

FIG. 10 is a plan view of the same four-point CT test plug.

FIG. 11 is an explanatory diagram of a usage state of the same four-point CT test plug.

FIG. 12 is a front view for explaining a conventional inspection method for the four-point CT test plug.

[Explanation of symbols]

 10A, 10B, 10C, 10D Test plug 20A, 20B, 20C, 20D Test device 21, 31 Plug storage case 22, 32 Plug insertion port 23, 33 Inspection circuit 24, 34 Resistance value tester A, A 'to O, O 'Primary contact terminal a, a' to o, o 'Secondary contact terminal A1, A1' to O1, O1 'Primary contact a1, a1' to o1, o1 'Secondary contact SW1, SW2 Inspection state Changeover switch PSW Operation switch R Resistance

Continuing from the front page (72) Inventor Masayoshi Naota 3-3-22 Nakanoshima, Kita-ku, Osaka-shi, Kansai Electric Power Co., Inc. (72) Inventor Tsuyoshi Motooka 3-2-22-2 Nakanoshima, Kita-ku, Osaka, Kansai (72) Inventor Junji Matsumoto 3-14-40 Senrioka, Settsu-shi, Osaka Toko Seiki Co., Ltd. F-term (reference) 5G042 FF02

Claims (7)

[Claims] 1. A plug test case having a plug insertion hole into which a plurality of primary contact terminals and secondary contact terminals of a protective relay panel CT test plug can be inserted, is inserted into the case. A plurality of primary contacts and secondary contacts that can be electrically connected to the respective contact terminals of the CT test plug, and an inspection circuit that connects the primary contacts and the secondary contacts are provided. A first inspection state and a primary contact terminal are provided outside the plug storage case, wherein the primary inspection terminal is interposed in the inspection circuit to detect at least a short circuit between the primary contact terminal and the secondary contact terminal to confirm non-conduction. An inspection state changeover switch capable of switching to a second inspection state for detecting a contact resistance value between contact terminals connected to each other in advance to check whether the conduction state is good or not, and the non-conduction state and the conduction state Test results and means for displaying the operation of the on-off operating the switch and the CT test plug test device for protection relay board, characterized in that provided in the inspection circuit of the quality. 2. The CT for a protective relay panel according to claim 1, wherein said inspection result display means is a tester for measuring a resistance value.
Test plug test equipment. 3. The inspection result display means according to claim 1, wherein the set value and the detected value are compared to determine whether a difference between the two values is within an allowable range, and the determination result is displayed. 4. A CT test plug test device for a protective relay panel according to claim 1. 4. The switch for inspection state switching, in addition to the first inspection state and the second inspection state, determines whether there is a short circuit between the contact terminals of the primary-side contact terminals that are not connected to each other in advance. 4. The CT test plug test apparatus for a protective relay panel according to claim 1, wherein the apparatus is configured to be able to switch to a third inspection state for detecting and confirming non-conduction. 5. A plug storage case having a plug insertion port into which a plurality of primary side contact terminals and secondary side contact terminals of a PT test plug for a protective relay panel can be inserted is inserted into the case. A plurality of primary contacts and secondary contacts that can be electrically connected to the respective contact terminals of the PT test plug, and the primary and secondary contacts are shifted in phase and connected via a resistor to perform a PT test. The presence or absence of a short circuit between the primary contact terminal and the secondary contact terminal of the plug and the presence or absence of a short circuit between adjacent terminals of the primary and secondary contact terminals are used to determine the quality of non-conductivity between the poles and phases. An inspection circuit that can be checked; and a means for displaying the inspection result of the non-conduction state via the inspection circuit outside the plug storage case;
An operation switch for turning on and off an inspection circuit is provided. A PT test plug test device for a protective relay panel. 6. The PT for a protective relay panel according to claim 5, wherein the inspection result display means is a tester for measuring a resistance value.
Test plug test equipment. 7. The inspection result display means compares the set value and the detected value, determines whether the difference between the two values is within an allowable range, and displays the determination result. Or a PT test plug test apparatus for a protective relay panel according to 6.