阅读说明：本技术 一种继电保护电流回路快速试验接线装置 (Relay protection current loop rapid test wiring device ) 是由 王磊 黄力 朱皓 晏丽丽 宁楠 黄照厅 付同福 张礼波 张建行 李树鹏 牟楠 于 2020-11-17 设计创作，主要内容包括：本发明公开了一种继电保护电流回路快速试验接线装置,包括壳体、导电单元和试验接线单元,大部分的导电单元和试验接线单元均设置在所述壳体内,导电单元连通继电保护电流回路,将电流传导致试验接线单元,由试验接线单元实现对继电保护电流回路的短接,并连接另一装置的电流保护回路。本发明所述装置提供了一种针对继电保护电流回路快速试验接线的专用工具,操作简单安全,极大节约了电工的接线时间,并且不易发生安全事故。(The invention discloses a relay protection current loop rapid test wiring device which comprises a shell, a conductive unit and a test wiring unit, wherein most of the conductive unit and the test wiring unit are arranged in the shell, the conductive unit is communicated with a relay protection current loop and conducts current to the test wiring unit, and the test wiring unit realizes short circuit of the relay protection current loop and is connected with a current protection loop of another device. The device provided by the invention provides a special tool for rapid test wiring of a relay protection current loop, is simple and safe to operate, greatly saves wiring time of electricians, and is not easy to cause safety accidents.)

1. The utility model provides a relay protection current circuit rapid test termination which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the test wire connector comprises a shell (100), wherein an accommodating space (M) is arranged in the shell and comprises test wire connectors (103) arranged on two side faces;

the conductive unit (200) comprises a plurality of conductive columns (201) arranged in the accommodating space (M) and a conductive plug (202) which is matched with the conductive columns (201) and extends out of the shell (100);

the test wiring unit (300) comprises a guide rail assembly (301) arranged at one end of the conductive column (201), a conductive sheet assembly (302) arranged in the guide rail assembly (301), a connecting assembly (303) for connecting the conductive column (201) and the conductive sheet assembly (302), an external test line (304) arranged on one side of the shell (100), and a short circuit box (305) arranged on the other side of the shell (100); the connecting assembly (303) is in sliding fit with the guide rail assembly (301), and the external test wire (304) are connected with the conductive plate assembly (302) through the test wire interface (103).

2. The relay protection current circuit rapid test wiring device of claim 1, characterized in that: the guide rail assembly (301) comprises a first guide rail (301a), a second guide rail (301b), a third guide rail (301c) and a fourth guide rail (301d) which are sequentially arranged from top to bottom; the conducting strip assembly (302) comprises a first conducting strip (302a) arranged in the first guide rail (301a), a second conducting strip (302b) arranged in the second guide rail (301b), a third conducting strip (302c) arranged in the third guide rail (301c), and a fourth conducting strip (302d) arranged in the fourth guide rail (301d), wherein the first conducting strip (302a), the second conducting strip (302b), the third conducting strip (302c) and the fourth conducting strip (302d) are respectively divided into two sections which are not connected.

3. The relay protection current circuit rapid test wiring device of claim 2, characterized in that: the external test wire (304) comprises a test wire plug (304a) matched with the test wire interface (103), a test wire shell (304b) connected with the test wire plug (304a), and a test wire (304c) correspondingly connected with the test wire plug (304 a).

4. The relay protection current circuit rapid test wiring device of claim 3, characterized in that: the test wire interface (103) comprises a first jack (103a) corresponding to the first conductive sheet (302a), a second jack (103b) corresponding to the second conductive sheet (302b), a third jack (103c) corresponding to the third conductive sheet (302c), and a fourth jack (103d) corresponding to the fourth conductive sheet (302 d).

5. The relay protection current circuit rapid test wiring device of claim 4, characterized in that: the test line plug (304a) includes a first plug (304a-1) mated with the first jack (103a), a second plug (304a-2) mated with the second jack (103b), a third plug (304a-3) mated with the third jack (103c), and a fourth plug (304a-4) mated with the fourth jack (103 d).

6. The relay protection current circuit rapid test wiring device of claim 5, characterized in that: the shorting box (305) includes a fifth plug (305b-1) mated with the first jack (103a), a sixth plug (305b-2) mated with the second jack (103b), a seventh plug (305b-3) mated with the third jack (103c), an eighth plug (305b-4) mated with the fourth jack (103d), and a conductive plate (305b-5) disposed within the shorting box (305), and the fifth plug (305b-1), the sixth plug (305b-2), the seventh plug (305b-3), and the eighth plug (305b-4) are all in contact with the conductive plate (305 b-5).

7. The relay protection current circuit rapid test wiring device of claim 6, characterized in that: the connecting assembly (303) comprises a first connector (303a) cooperating with the first guide rail (301a), a second connector (303b) cooperating with the second guide rail (301b), a third connector (303c) cooperating with the third guide rail (301c), and a fourth connector (303d) cooperating with the fourth guide rail (301 d); the first connecting piece (303a) comprises a first conductive end (303a-1) with two ends respectively contacted with the conductive column (201) and the conductive sheet assembly (302) in the first guide rail (301a), and a first sliding end (303a-2) in sliding fit with the first guide rail (301 a); the second connecting piece (303b) comprises a second conductive end (303b-1) with two ends respectively contacted with the conductive column (201) and the conductive sheet assembly (302) in the second guide rail (301b), and a second sliding end (303b-2) in sliding fit with the second guide rail (301 b); the third connecting piece (303c) comprises a third conductive end (303c-1) with two ends respectively contacted with the conductive column (201) and the conductive sheet assembly (302) in the third guide rail (301c), and a third sliding end (303c-2) in sliding fit with the third guide rail (301 c); the fourth connecting piece (303d) comprises a fourth conductive end (303d-1) with two ends respectively contacting with the conductive column (201) and the conductive sheet assembly (302) in the fourth guide rail (301d), and a fourth sliding end (303d-2) in sliding fit with the fourth guide rail (301 d).

8. The relay protection current circuit rapid test wiring device of claim 7, characterized in that: the first connecting piece (303a) further comprises a first connecting rod (303a-3) connected with the first sliding end (303a-2), and a first moving cap (303a-4) arranged outside the shell (100) and connected with the first connecting rod (303 a-3); the second connecting piece (303b) further comprises a second connecting rod (303b-3) connected with the second sliding end (303b-2), and a second moving cap (303b-4) arranged outside the shell (100) and connected with the second connecting rod (303 b-3); the third connecting piece (303c) further comprises a third connecting rod (303c-3) connected with the third sliding end (303c-2), and a third moving cap (303c-4) arranged outside the shell (100) and connected with the third connecting rod (303 c-3); the second connecting member (303b) further comprises a fourth connecting rod (303d-3) connected with the fourth sliding end (303d-2), and a fourth moving cap (303d-4) disposed outside the housing (100) and connected with the fourth connecting rod (303 d-3).

9. The relay protection current circuit rapid test wiring device of claim 8, wherein: the shell (100) comprises a shell (101) and an end cover (102), wherein a plurality of through holes (101a) matched with the conductive plugs (202) are formed in the shell (101), a first groove (102a) matched with the first connecting rod (303a-3), a second groove (102b) matched with the second connecting rod (303b-3), a third groove (102c) matched with the third connecting rod (303c-3) and a fourth groove (102d) matched with the fourth connecting rod (303d-3) are formed in the end cover (102).

10. The relay protection current circuit rapid test wiring device of claim 9, wherein: a nut (202a) is fixed on the conductive plug (202), and the conductive plug (202) is in threaded fit with the through hole (101 a); an arc-shaped copper sheet (201b) is arranged on the end face of the conductive column (201), and the contact surfaces of the first conductive end (303a-1), the second conductive end (303b-1), the third conductive end (303c-1), the fourth conductive end (303d-1) and the arc-shaped copper sheet (201b) are arc surfaces.

Technical Field

The invention relates to the technical field of relay protection, in particular to a wiring device for a relay protection current loop quick test.

Background

At present, the field operation of relay protection has the following problems:

1. when one set of protection or safety automation equipment is stopped for testing and the primary equipment is not powered off, safety measures of other protection or safety automation equipment must be taken special attention due to the fact that current loops are connected in series, for example, the tail end of the related current loop is in short circuit or in cross connection, and misoperation of other protection or safety automation equipment or stopping of current terminal equipment cannot be caused.

2. At present, no special tool for short circuit or bridging of the relay protection current loop exists. For a long time, the implementation of the safety measure of short circuit or bridging of the current secondary circuit is carried out by using the current short connecting sheet (wire) or the test wire in a double-person matching way, because the sequencing designs of the current circuit terminals of various manufacturers are different, the current circuits of some manufacturers must be bridged by using the test wire, the whole safety measure implementation process consumes long time, the steps are multiple, the fault tolerance is low, any process is not done, the open circuit of the current circuits at the running interval can be caused, the operation risk is extremely high, the problem that the test wire used for bridging the current is poor in reliability, the test wire is easy to be mistakenly knocked and removed by people, and the like exists, and particularly, the work of frequently needing bridging time of more than ten days such as stable connection. Once the safety measures of the short circuit or the cross connection of the current loop fail, the serious consequences of false operation, failure operation, CT reverse charging, open circuit of the current loop, no waveform of fault recording (traveling wave) and the like of the protection or safety automatic equipment can be caused.

3. According to relevant regulations, when relay protection and safety automation equipment is inspected and tested, a whole set of tests of double-set protection current series connection and voltage parallel connection needs to be carried out on the two equipment, actual wiring is complex, operation is troublesome, and danger is easy to occur.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems occurring in the conventional relay protection current circuit.

Therefore, the problem to be solved by the present invention is how to provide a wiring device for a rapid test of a relay protection current loop.

In order to solve the technical problems, the invention provides the following technical scheme: a relay protection current loop rapid test wiring device comprises a shell, a first connecting piece and a second connecting piece, wherein the shell is internally provided with a containing space and comprises test wire interfaces arranged on two side surfaces; the conductive unit comprises a plurality of conductive columns arranged in the accommodating space and a conductive plug which is matched with the conductive columns and extends out of the shell; the test wiring unit comprises a guide rail assembly arranged at one end of the conductive column, a conductive sheet assembly arranged in the guide rail assembly, a connecting assembly for connecting the conductive column and the conductive sheet assembly, an external test line arranged on one side of the shell and a short circuit box arranged on the other side of the shell; the coupling assembling with guide rail component sliding fit, external test wire with external test wire all passes through the test wire interface with the conducting strip subassembly is connected.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the guide rail assembly comprises a first guide rail, a second guide rail, a third guide rail and a fourth guide rail which are sequentially arranged from top to bottom; the conducting strip assembly comprises a first conducting strip arranged in the first guide rail, a second conducting strip arranged in the second guide rail, a third conducting strip arranged in the third guide rail and a fourth conducting strip arranged in the fourth guide rail, and the first conducting strip, the second conducting strip, the third conducting strip and the fourth conducting strip are respectively divided into two sections which are not connected.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the external test wire comprises a test wire plug matched with the test wire interface, a test wire shell connected with the test wire plug, and a test wire correspondingly connected with the test wire plug.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the test wire interface comprises a first jack corresponding to the first conducting strip, a second jack corresponding to the second conducting strip, a third jack corresponding to the third conducting strip and a fourth jack corresponding to the fourth conducting strip.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the test line plug comprises a first plug matched with the first jack, a second plug matched with the second jack, a third plug matched with the third jack and a fourth plug matched with the fourth jack.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the short circuit box comprises a fifth plug matched with the first jack, a sixth plug matched with the second jack, a seventh plug matched with the third jack, an eighth plug matched with the fourth jack and a conductive plate arranged in the short circuit box, and the fifth plug, the sixth plug, the seventh plug and the eighth plug are all in contact with the conductive plate.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the connecting assembly comprises a first connecting piece matched with the first guide rail, a second connecting piece matched with the second guide rail, a third connecting piece matched with the third guide rail and a fourth connecting piece matched with the fourth guide rail; the first connecting piece comprises a first conductive end and a first sliding end, wherein two ends of the first conductive end are respectively contacted with the conductive column and the conductive sheet assembly in the first guide rail, and the first sliding end is in sliding fit with the first guide rail; the second connecting piece comprises a second conductive end and a second sliding end, wherein two ends of the second conductive end are respectively contacted with the conductive column and the conductive sheet assembly in the second guide rail, and the second sliding end is in sliding fit with the second guide rail; the third connecting piece comprises a third conductive end and a third sliding end, wherein two ends of the third conductive end are respectively contacted with the conductive column and the conductive sheet assembly in the third guide rail, and the third sliding end is in sliding fit with the third guide rail; the fourth connecting piece comprises a fourth conductive end and a fourth sliding end, wherein two ends of the fourth conductive end are respectively in contact with the conductive column and the conductive sheet assembly in the fourth guide rail, and the fourth sliding end is in sliding fit with the fourth guide rail.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the first connecting piece further comprises a first connecting rod connected with the first sliding end, and a first movable cap arranged outside the shell and connected with the first connecting rod; the second connecting piece also comprises a second connecting rod connected with the second sliding end and a second movable cap arranged outside the shell and connected with the second connecting rod; the third connecting piece also comprises a third connecting rod connected with the third sliding end and a third movable cap which is arranged outside the shell and connected with the third connecting rod; the second connecting piece further comprises a fourth connecting rod connected with the fourth sliding end and a fourth movable cap arranged outside the shell and connected with the fourth connecting rod.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: the shell comprises a shell and an end cover, wherein the shell is provided with a plurality of through holes matched with the conductive plugs, and the end cover is provided with a first groove matched with the first connecting rod, a second groove matched with the second connecting rod, a third groove matched with the third connecting rod and a fourth groove matched with the fourth connecting rod.

As a preferred scheme of the wiring device for the relay protection current loop rapid test, the wiring device comprises: a nut is fixed on the conductive plug, and the conductive plug is in threaded fit with the through hole; the end face of the conductive column is provided with an arc-shaped copper sheet, and the contact surfaces of the first conductive end, the second conductive end, the third conductive end, the fourth conductive end and the arc-shaped copper sheet are arc surfaces.

The special tool for the rapid test wiring of the relay protection current loop has the advantages of being simple and safe to operate, greatly saving wiring time of electricians and being not easy to cause safety accidents.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 shows two types of test wiring patterns in the first terminal arrangement sequence of the conventional protection circuit in example 1.

Fig. 2 shows two types of test wiring patterns in the second terminal arrangement sequence of the conventional protection circuit in example 1.

Fig. 3 is a schematic diagram of a test wiring device of the relay protection current loop of example 1 arranged relative to the test wiring unit of fig. 1.

Fig. 4 is a schematic diagram of the arrangement of the relay protection current loop quick test connection device of example 1 relative to the test connection unit of fig. 2.

Fig. 5 is a block diagram of a junction device for a rapid test of a relay protection current loop in example 1.

Fig. 6 is a structure diagram of a housing of the junction device for the rapid test of the relay protection current loop in example 1.

Fig. 7 is a cross-sectional view of a relay protection current loop rapid test wiring device of example 1.

Fig. 8 is a partial test wiring unit structure diagram of the relay protection current loop quick test wiring device of example 1.

Fig. 9 is a schematic view of a connecting component of a junction device for a rapid test of a relay protection current loop in example 1.

Fig. 10 is a schematic view of an arc copper sheet of the junction device for the rapid test of the relay protection current loop in example 1.

Fig. 11 is a schematic diagram of a short-circuit box of the junction device for the rapid test of the relay protection current loop in example 1.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 and 2, a first embodiment of the present invention provides a relay protection current circuit rapid test wiring device, which includes a housing 100, a conductive unit 200, and a test wiring unit 300, wherein most of the conductive unit 200 and the test wiring unit 300 are disposed in the housing 100, the conductive unit 200 is communicated with the relay protection current circuit to conduct current to the test wiring unit 300, and the test wiring unit 300 realizes short circuit of the relay protection current circuit and is connected to a current protection circuit of another device.

The conventional protection circuit has 8 terminals, and for convenience of description, the next 8 terminals are respectively named as: A. b, C, N, a, B, C, N, and in general, there are two cases in the terminal arrangement order: the first case is: A. a, B, B, C, C, N, N, and in the second case: A. b, C, N, a, B, C and N have two test line connection modes under the first terminal arrangement sequence, such as the mode shown in figure 1, and the terminals also have two test line connection modes under the second terminal arrangement sequence, such as the mode shown in figure 2, and the open circles in figures 1 and 2 represent that no connection exists at the cross part. In fig. 1, there are two output terminals in the 1 st case, which are respectively output to the test instrument and the protection current loop of another set of equipment, and in the 2 nd case there is only one output terminal, which is output to the test instrument; in fig. 2, in case 1, there are two outputs, one for each test device and the protective current loop of the other set of devices, and in case 2, there is only one output, which is fed to the test device.

Specifically, the housing 100 is provided with an accommodating space M inside, and includes test line interfaces 103 disposed on two side surfaces, where the test line interfaces 103 are provided with 2 groups, and each group has 4 interfaces.

The conductive unit 200 includes a plurality of conductive posts 201 disposed in the accommodating space M, and a conductive plug 202 that is matched with the conductive posts 201 and extends out of the housing 100, where the conductive plug 202 is connected to an interface of a relay protection and safety automation device current loop.

The test connection unit 300 includes a guide rail assembly 301 disposed at one end of the conductive pillar 201, a conductive sheet assembly 302 disposed in the guide rail assembly 301, a connection assembly 303 connecting the conductive pillar 201 and the conductive sheet assembly 302, an external test line 304 disposed at one side of the housing 100, and a shorting box 305 disposed at the other side of the housing 100; coupling assembling 303 with guide rail set 301 sliding fit, external test wire 304 with external test wire 304 all passes through test wire interface 103 with conducting strip subassembly 302 is connected.

Further, the guide rail assembly 301 comprises a first guide rail 301a, a second guide rail 301b, a third guide rail 301c and a fourth guide rail 301d which are sequentially arranged from top to bottom; the conductive sheet assembly 302 includes a first conductive sheet 302a disposed in the first rail 301a, a second conductive sheet 302B disposed in the second rail 301B, a third conductive sheet 302C disposed in the third rail 301C, and a fourth conductive sheet 302d disposed in the fourth rail 301d, and the first conductive sheet 302a, the second conductive sheet 302B, the third conductive sheet 302C, and the fourth conductive sheet 302d are respectively divided into two sections that are not connected, for convenience of description, 8 conductive posts 201 a, B, C, N are named in sequence, so that the first conductive sheet 302a is disconnected between a and a, the second conductive sheet 302B is disconnected between B, B, the third conductive sheet 302C is disconnected between C, C, and the fourth conductive sheet 302d is disconnected between N, N.

Further, the external test wire 304 comprises a test wire plug 304a matched with the test wire interface 103, a test wire shell 304b connected with the test wire plug 304a, and a test wire 304c correspondingly connected with the test wire plug 304a, wherein the test wire interface 103 comprises a first jack 103a corresponding to the first conductive sheet 302a, a second jack 103b corresponding to the second conductive sheet 302b, and a third jack 103c corresponding to the third conductive sheet 302c, and a fourth jack 103d corresponding to the fourth conductive sheet 302d, the test line plug 304a including a first plug 304a-1 mated with the first jack 103a, a second plug 304a-2 mated with the second jack 103b, a third plug 304a-3 mated with the third jack 103c, and a fourth plug 304a-4 mated with the fourth jack 103 d.

Further, the shorting box 305 includes a fifth plug 305b-1 mated with the first jack 103a, a sixth plug 305b-2 mated with the second jack 103b, a seventh plug 305b-3 mated with the third jack 103c, an eighth plug 305b-4 mated with the fourth jack 103d, and a conductive plate 305b-5 disposed within the shorting box 305, and the fifth plug 305b-1, the sixth plug 305b-2, the seventh plug 305b-3, and the eighth plug 305b-4 are all in contact with the conductive plate 305 b-5.

Further, the connection assembly 303 includes a first connector 303a engaged with the first guide rail 301a, a second connector 303b engaged with the second guide rail 301b, a third connector 303c engaged with the third guide rail 301c, and a fourth connector 303d engaged with the fourth guide rail 301 d; the first connecting part 303a comprises a first conductive end 303a-1 with two ends respectively contacting the conductive pillar 201 and the conductive sheet assembly 302 in the first guide rail 301a, and a first sliding end 303a-2 in sliding fit with the first guide rail 301 a; the second connecting part 303b comprises a second conductive end 303b-1 with two ends respectively contacting with the conductive column 201 and the conductive sheet assembly 302 in the second guide rail 301b, and a second sliding end 303b-2 in sliding fit with the second guide rail 301 b; the third connecting part 303c comprises a third conductive end 303c-1, two ends of which are respectively in contact with the conductive column 201 and the conductive sheet assembly 302 in the third guide rail 301c, and a third sliding end 303c-2 in sliding fit with the third guide rail 301 c; the fourth connecting part 303d includes a fourth conductive end 303d-1 having two ends respectively contacting the conductive post 201 and the conductive pad assembly 302 in the fourth guiding rail 301d, and a fourth sliding end 303d-2 slidably engaged with the fourth guiding rail 301 d.

Further, the first connecting member 303a further comprises a first connecting rod 303a-3 connected to the first sliding end 303a-2, and a first moving cap 303a-4 disposed outside the housing 100 and connected to the first connecting rod 303 a-3; the second connecting member 303b further comprises a second connecting rod 303b-3 connected to the second sliding end 303b-2, and a second moving cap 303b-4 disposed outside the housing 100 and connected to the second connecting rod 303 b-3; the third connecting member 303c further comprises a third connecting rod 303c-3 connected to the third sliding end 303c-2, and a third moving cap 303c-4 disposed outside the housing 100 and connected to the third connecting rod 303 c-3; the second connecting member 303b further includes a fourth connecting rod 303d-3 connected to the fourth sliding end 303d-2, and a fourth moving cap 303d-4 disposed outside the housing 100 and connected to the fourth connecting rod 303 d-3.

The shell 100 comprises a shell 101 and an end cover 102, the shell 101 is provided with a plurality of through holes 101a matched with the conductive plugs 202, and the end cover 102 is provided with a first groove 102a matched with the first connecting rod 303a-3, a second groove 102b matched with the second connecting rod 303b-3, a third groove 102c matched with the third connecting rod 303c-3 and a fourth groove 102d matched with the fourth connecting rod 303 d-3.

Furthermore, a nut 202a is fixed on the conductive plug 202, and the conductive plug 202 is in threaded fit with the through hole 101a, the conductive plug 202 is detachable, and the number and the position of the conductive plugs 202 can be selectively installed, so that the device is more flexible to use. As shown in fig. 10, the end surface of the conductive post 201 is provided with an arc-shaped copper sheet 201b, the arc-shaped copper sheet 201b has certain elasticity, the two sides of the arc-shaped copper sheet 201b are concave and the middle of the arc-shaped copper sheet is high, and the connection with the conductive end is tighter, and the contact surfaces of the first conductive end 303a-1, the second conductive end 303b-1, the third conductive end 303c-1, the fourth conductive end 303d-1 and the arc-shaped copper sheet 201b are all arc surfaces, so that when the first conductive end 303a-1, the second conductive end 303b-1, the third conductive end 303c-1 and the fourth conductive end 303d-1 slide, the side surface of the conductive post 201 cannot be clamped.

In conclusion, by adjusting the positions of the 2 first connecting pieces 303a, the 2 second connecting pieces 303b, the 2 third connecting pieces 303c and the 2 fourth connecting pieces 303d and matching the shorting box 305 and the external test line 304, the whole set of tests of the same equipment with the double-set protection current in series and the voltage in parallel can be completely realized, the operation is simple and safe, the wiring time of an electrician is greatly saved, and safety accidents are not easy to happen. When the device is used, the connecting component 303 is moved to a corresponding position, the short-circuit box 305 and the external test wire 304 are inserted according to needs, the output end of the external test wire 304 is connected to the next device, and then the device is connected to the relay protector in an inserted mode.

Table 1: the device of the invention is compared with the prior art

Compared with the traditional test line, the safety measures that the relay protection current loop test wiring can be completed only by 12 to 15 operation steps originally are simplified to 3 to 5 operation steps, so that the operation time of the work is greatly reduced, and meanwhile, the operation steps of manual wiring operation are reduced, so that the error rate is reduced, and the operation risk is reduced to a certain extent. At present, the current terminals need to be checked manually in relay protection current loop test wiring work, the traditional test wires are used for single-phase connection, work operation risks of implementing current loop test wiring safety measures are high, time consumption is long, and the wiring work of each current loop test takes 9 minutes on average. With the device of the present invention, the test wiring was reduced to 1 minute.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.