CN110456113A - A kind of plug-in electric current essential safety terminal - Google Patents

Abstract

The present application provides a plug-in type current intrinsically safe terminal, the terminal is arranged between the relay protection device and the transformer equipment, including: a base connector, an isolation plug and a test plug; the base connector is provided with a base terminal The base terminal block is integrated on the base connector. One end of the base terminal block is continuously connected to the relay protection device through wires, and the other end is connected to the transformer equipment. At the same time, the base terminal block is movable with the test plug or isolation plug. connected. The plug-in current intrinsically safe terminal provided by this application can control the normal connection or short connection of the connection line of the terminal block of the base through the insertion or removal of the isolation plug or the test plug, and can realize the connection between the primary equipment and the secondary equipment, and the secondary equipment. The high-efficiency on-site rapid test, "plug and play", avoids the influence of on-site personnel and equipment conditions on the cable connection quality, and has the characteristics of safe, convenient and efficient use.

Description

A plug-in current intrinsically safe terminal

technical field

The present application relates to the technical field of power systems, in particular to a plug-in current intrinsically safe terminal.

Background technique

In recent years, various potential hidden troubles often appear in the secondary circuit of the power system whether it is a new investment or an operating plant and station, causing accidents caused by relay protection and other devices to malfunction or refuse to operate. The secondary circuit of the station current is used for relay protection and other related work.

When carrying out work related to relay protection in substations, there is a risk of accidental tripping of the protection device. At this time, it is necessary to take corresponding secondary safety measures. It is necessary to remove the relevant secondary circuits of the current voltage and the trip circuit. Or during the recovery process, there may be risks of accidental touch, insufficient recovery, or recovery errors.

Therefore, there is an urgent need for an operation method that replaces the existing manual wiring of terminal blocks and performs on-site verification. It can not touch live terminals, do not change wiring, eliminate the possibility of wrong wiring, and has the characteristics of safe, convenient, and efficient use.

Contents of the invention

This application provides a plug-in current intrinsically safe terminal, which overcomes the related secondary circuits of the current voltage and tripping circuit. During the dismantling process or recovery process, there will be risks of accidental touch, insufficient recovery, or incorrect recovery. , can realize high-efficiency on-site rapid testing between primary equipment, secondary equipment, and secondary equipment, "plug and play", avoiding the influence of on-site personnel and equipment conditions on the quality of cable connections.

The technical scheme adopted by the application to solve the above-mentioned technical problems is as follows:

A plug-in current intrinsically safe terminal, the terminal is arranged between the relay protection device and the transformer equipment,

Includes: base connector, isolation plug and test plug;

The base connector is provided with a base terminal row, the base terminal row is integrated on the base connector, one end of the base terminal row is continuously connected to the relay protection device through a wire, and the other end is connected to the relay protection device. The transformer equipment is connected, the base terminal row is movably connected to the test plug or the isolation plug, and the end of the base terminal row connected to the relay protection device and the transformer equipment is located at the base connector Inside, one end connected to the isolating plug or the test plug is located outside the base connector;

The normal connection or short-circuiting of the connection lines of the base terminal block is controlled by the insertion or removal of the isolation plug or the test plug.

Optionally, the base terminal row includes several base terminals, and each base terminal is provided with an independent reed and an independent insertion hole inside;

The insertion hole is used for connecting the isolation plug or the test plug;

The reeds include a second reed, a third reed and two first reeds, the second reed and the third reed are symmetrically arranged at the center of the base terminal, and the second reed Contact with one end of the third reed to form a third contact, the second reed is connected to the input wire of the relay protection device, and the third reed is connected to the output wire of the transformer device, wherein the input wire , the output wire, the second reed, the third reed and the third contact form the main circuit;

The other ends of the second reed and the third reed are close to each other but not in contact, forming a second contact; the two first reeds are symmetrically arranged on the outside of the second reed and the third reed , the two first reeds are close to but not in contact with each other to form a first contact, and the first contact, the second contact and the third contact are on the same straight line.

Optionally, the insertion hole is a square test connection port.

Optionally, the two ends of the test plug are respectively provided with an injection type test plug and a test hole row, and the middle part is provided with a buckle, and the buckle is provided with a baffle upwardly extending toward the test hole row, and the A connection handle is provided between the baffles; the injection plug is pluggably installed in the terminal block of the base, and is electrically connected to the test hole row; the end of the test hole row away from the injection plug is connected to the transformer equipment connected.

Optionally, the buckle is connected to a handle, and a locking mechanism is provided on the buckle, and the handle is rotated to control the opening and closing of the locking mechanism. When the injection plug is installed on the base terminal, the buckle is clamped on the corresponding on the base terminal block;

An indicator is provided on one side of the baffle, and when the handle is turned to make the indicator of the test plug green, the test plug can be pulled out normally.

The technical solution provided by the application includes the following beneficial technical effects:

The present application provides a plug-in type current intrinsically safe terminal, the terminal is arranged between the relay protection device and the transformer equipment, including: a base connector, an isolation plug and a test plug; the base connector is provided with a base terminal The base terminal block is integrated on the base connector. One end of the base terminal block is continuously connected to the relay protection device through wires, and the other end is connected to the transformer equipment. At the same time, the base terminal block is movable with the test plug or isolation plug. Connected, and the end of the base terminal block connected to the relay protection device and the transformer equipment is located in the base connector, and the end connected to the isolation plug or test plug is located outside the base connector. The plug-in current intrinsically safe terminal provided by this application realizes the automatic sealing isolation and testing of the secondary circuit through the insertion or removal of the isolation plug or the test plug to control the normal connection or short connection of the connection line of the base terminal block. It can realize high-efficiency on-site rapid testing between primary equipment, secondary equipment, and secondary equipment, "plug and play", avoiding the influence of on-site personnel and equipment conditions on the quality of cable connections, and has the characteristics of safe, convenient, and efficient use. .

Description of drawings

In order to illustrate the technical solution of the present application more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, on the premise of not paying creative work, Additional drawings can also be derived from these drawings.

Fig. 1 is the loop state of the secondary current terminal provided by the embodiment of the present application during normal operation;

Fig. 2 is the circuit state during the fixed inspection of the secondary current terminal provided by the embodiment of the present application;

Fig. 3 is the circuit state when the secondary current terminal short-circuit provided by the embodiment of the present application;

Fig. 4 is a schematic diagram of the structure of the base terminal provided by the embodiment of the present application;

FIG. 5 is a schematic structural diagram of an isolation plug provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a single test plug provided in an embodiment of the present application;

Fig. 7 is a schematic structural diagram of the integrated test plug provided by the embodiment of the present application.

Explanation of reference signs: 1-screw fixing port, 2-insertion hole, 3-third reed, 4-second reed, 5-first reed, 6-first contact, 7-second contact , 8-the third contact, 9-the first test terminal, 10-the second test terminal, 11-the third test terminal, 12-the fourth test terminal, 13-one-piece plug, 14-buckle, 15- Baffle, 17-handle, 18-test hole row, 19-injection test plug.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application; obviously, the described implementation Examples are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

The embodiment of the present application provides a plug-in current intrinsically safe terminal, which is arranged between the relay protection device and the transformer equipment, including: a base connector, an isolation plug and a test plug; wire connection.

Among them, the base connector is provided with a base terminal block, the base terminal block is integrated on the base connector, one end of the base terminal block is continuously connected to the relay protection device through a wire, and the other end is connected to the transformer equipment, and at the same time , the base terminal block is movably connected to the test plug or the isolation plug, and the end of the base terminal block connected to the relay protection device and the transformer equipment is located inside the base connector, and the end connected to the isolation plug or test plug is located outside the base connector ; There are screw fixing ports 1 at the connections between the base terminal block and the relay protection device and the transformer equipment, which are used to install and fix the base terminal block in the later stage.

The normal connection or short circuit of the connection line of the base terminal block is controlled by the insertion or removal of the isolation plug or the test plug.

The plug-in current intrinsically safe terminal provided in the embodiment of this application controls the normal connection or short circuit of the connecting line of the base terminal block through the insertion or withdrawal of the isolation plug or the test plug. When the test plug or the isolation plug is not inserted, the circuit The main circuit is in a normal working state. As shown in Figure 1, the circuit state of the secondary current terminal provided by the embodiment of the present application is in normal operation. It can be seen from the figure that the transformer equipment and relay protection device are normal, and the current passes through the transformer Equipment, base terminal block, relay protection device, and finally return to the transformer equipment to form a loop; when a regular inspection is required, when the test plug is inserted into the base terminal block, the secondary circuit is shorted first and then broken, so that the side of the relay protection device It is isolated from the equipment side of the transformer, as shown in Figure 2, the contacts of terminals Ia and Ian are disconnected, and the terminals Ia and Ian are short-circuited. After all the circuits are safely isolated, the daily protection verification and transmission test can be carried out. The transformer equipment While the side is short-circuited, the test source on the relay protection device side is tested through the test plug injection device, so as to realize the test of the secondary circuit.

Similarly, when the isolation plug is inserted into the base terminal block, the current terminals are short-circuited and the circuit is interrupted at the same time. As shown in Figure 3, the contacts of terminals Ia and Ian are disconnected, terminals Ia and Ian are short-circuited, and the circuit is interrupted at the same time , the equipment side of the transformer is short-circuited, and the current returns through the short-circuit piece to realize automatic sealing and isolation of the secondary circuit.

Optionally, the base terminal row includes several base terminals, and each base terminal is provided with an independent reed and an independent insertion hole 2 inside;

Insertion hole 2 is used to connect isolation plug or test plug;

As shown in Figure 4, it is a schematic diagram of the structure of the base terminal provided by the embodiment of the present application. The reeds include a second reed 4, a third reed 3 and two first reeds 5. The second reed 4 and the third reed The piece 3 is symmetrically arranged in the center of the base terminal, the second reed 4 is in contact with one end of the third reed 3 to form the third contact 8, which is the main circuit contact, and the second reed 4 is connected to the relay protection device The input lead, the third reed 3 is connected to the output lead of the transformer equipment, wherein the input lead, the output lead, the second reed 4, and the third reed 3 are combined with the third contact 8 to form a main circuit;

The other ends of the second reed 4 and the third reed 3 are close to each other but not in contact, forming a second contact 7, which is a direct auxiliary contact; two first reeds 5 are symmetrically arranged on the second reed 4 and On the outside of the third reed 3, two first reeds 5 are close to each other but not in contact, forming a first contact 6, which is a short-circuit bridging reed contact, the first contact 6, the second contact 7 and the third The contact 8 is on the same straight line, and the protective contact composed of three-segment reeds can cooperate with the test plug for orderly short-circuiting and breaking. At the same time, different bridging methods are also provided in the embodiment of the present application, and the bridging member can be used for equipotential connection between different circuits. Through this pre-insulated plug-in bridging mode, it can meet the protection against electric shock, make the circuit operation safer and more reliable, and be easier to install. This bridging method can be used to expand the wiring position and equipotential connection of the circuit.

When the test plug or the isolation plug is not inserted, the main circuit of the circuit is in the normal working state, and the main circuit formed by the current through the input wire, the output wire, the second reed 4, the third reed 3 and the third contact 8 is in the In normal working condition, the equipment side of the transformer and the relay protection device are normal. When the test plug or isolation plug is inserted into the terminal block of the base, the plug contacts the second contact 7 or the first contact 6, and the third contact 8 is disconnected. The mutual inductance The short-circuit bridging configuration of the transformer equipment works, the secondary circuit is shorted first and then broken, so that the side of the relay protection device is isolated from the side of the transformer equipment, and the test work and automatic sealing and isolation of the secondary circuit are realized.

In order to match a general test plug or an isolation plug, as shown in FIG. 5 , which is a schematic structural diagram of the isolation plug provided by the embodiment of the present application, the insertion hole 2 is set as a square test connection port.

The test plug provided in the embodiment of the present application includes a single test plug, an integral test plug or a short handle test plug, as shown in FIG. The first test terminal 9, the second test terminal 10, the third test terminal 11, and the fourth test terminal 12 can be selected and applied under different conditions. During the regular inspection of transformer equipment, the test source can be used when using a single test plug. Inject the test circuit through the single plug 13 to form a loop, and obtain the current value of the measurement point at the same time. Wherein, FIG. 7 is a schematic structural diagram of the integral test plug provided by the embodiment of the present application. The two ends of the integral test plug are respectively provided with an injection-type test plug and a test hole row 18, and the middle part is provided with a buckle 14, and the buckle 14 is extended to the test hole row 18. A baffle 15 is arranged upward, and between the baffles 15 A connection handle 17 is provided; the injection-type test plug is pluggably installed in the terminal block of the base, and is electrically connected to the test hole row 18; the end of the test hole row 18 away from the injection-type test plug is connected to the transformer equipment.

Optionally, the buckle 14 is connected to the handle 17, and a locking mechanism is provided on the buckle 14, and the turning handle 17 controls the opening and closing of the locking mechanism. When the injection plug is installed on the base terminal, the buckle 14 is held in the corresponding In the embodiment of the application, the locking connection is realized through the locking mechanism, the locking method is fast, the locking is firm and reliable, the operation is convenient, and the connection is misplaced; it has anti-vibration performance, large locking force, and anti-vibration The cable has strong pulling ability and larger wiring space; high and low temperature resistance, corrosion resistance, airtight moisture resistance, good insulation, good conductivity; reliable contact and high protection level, very suitable for application in substation conditions.

Simultaneously, one side top surface of baffle plate 15 is provided with indication position, and indication position is divided into red and green indication position, when rotating handle 17 and makes the indication position of test plug be green, can normally pull out test plug.

Exemplary, the plug-in current intrinsically safe terminal provided in this application, the base connector adopts the panel installation method, and the test plug or isolation plug can be inserted to test the circuit without opening the cabinet door. The inner side of the panel is connected, and the power circuit enters the normal working state. Insert the test plug or isolation plug, and the loop can be tested. The test plug can be short-circuited according to different test requirements. The handle 17 has a self-locking function. When the handle 17 is turned to make the indicator of the test plug turn green, the test plug can be pulled out normally.

Exemplary, lead-sealable transparent covers are used to secure the front of the base terminal block during non-test operating hours. If the lead-sealable protective cover is not opened, the test plug cannot be inserted to test the circuit, and the transparent cover can meet the visibility of the circuit.

A pluggable current intrinsically safe terminal provided in the embodiment of the present application controls the normal connection or short connection of the connection line of the terminal block of the base through the insertion or removal of the isolation plug or the test plug, so as to realize the automatic sealing and isolation of the secondary circuit And testing work, can realize efficient on-site rapid testing between primary equipment, secondary equipment, and secondary equipment, "plug and play", avoiding the influence of on-site personnel and equipment conditions on the quality of cable connections, with safe and convenient use , high efficiency and other characteristics.

It should be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that an article or device comprising a set of elements includes not only those elements but also items not expressly listed. other elements, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific implementation manners of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the present application is not limited to what has been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (5)

1. a kind of plug-in electric current essential safety terminal, which is characterized in that the terminal is set to relay equipment and sets with mutual inductor Between standby,

It include: dock connector, stab contact and test plug；

It is provided with pedestal terminal block on the dock connector, the pedestal terminal is arranged in a row on the dock connector, institute The one end for stating pedestal terminal block is continuously connected with by conducting wire and relay equipment, and the other end is connect with the mutual inductor equipment, described Pedestal terminal block is movably connected with the test plug or stab contact, and the pedestal terminal block connect the relay equipment and One end of mutual inductor equipment is located in the dock connector, connects one end of the stab contact or test plug positioned at described Outside dock connector；

Normally connecting for the pedestal terminal block connection line is controlled by the insertion or abjection of the stab contact or test plug It connects or is shorted.

2. plug-in electric current essential safety terminal according to claim 1, which is characterized in that the pedestal terminal block includes Several pedestal terminals, each pedestal terminal are internally provided with independent reed and independent insertion hole；

The insertion hole is for connecting the stab contact or test plug；

The reed includes the second reed, third reed and two the first reeds, and second reed and third reed are symmetrical The center of the pedestal terminal is set, and second reed is in contact to form third contact with one end of third reed, described The input lead of relay protection device is connected on second reed, the output that the third reed connects the mutual inductor equipment is led Line, wherein input lead, output lead, the second reed, third reed combination third contact form major loop；

Second reed is close to each other with the other end of third reed but does not contact, and forms the second contact；Described two first Reed is symmetricly set on the outside of second reed and third reed, and described two first reeds are close to each other but do not connect Touching forms the first contact, and first contact, the second contact and third contact are on the same line.

3. plug-in electric current essential safety terminal according to claim 2, which is characterized in that the insertion hole is rectangular survey Try connector.

4. plug-in electric current essential safety terminal according to claim 1, which is characterized in that the test plug both ends point Not She You pouring-in test plug and instrument connection row, and middle part position be equipped with buckle, it is described buckle to the instrument connection arrange extend Prescription has set up baffle, and connection handle is provided between the baffle；The pouring-in plug is pluggable to be mounted on institute It states in pedestal terminal block, and realizes and be electrically connected with instrument connection row；Instrument connection is arranged one end far from pouring-in plug and is set with mutual inductor It is standby to be connected.

5. plug-in electric current essential safety terminal according to claim 4, which is characterized in that it is described to snap connection handle, Locking mechanism is set on buckle, and rotating handles control the opening and closing of the locking mechanism, are buckled in pouring-in plug installation It is held in corresponding pedestal terminal block in the base end period of the day from 11 p.m. to 1 a.m by locking mechanism；

It is provided with indicating bit on the side top surface of the baffle, it, can when swing handle makes the indicating bit green of test plug Normally to extract test plug.