Secondary hot plug open-circuit-preventing current maintenance terminal

Abstract

The utility model relates to the technical field of electric power systems, in particular to a secondary hot plug open-circuit-proof current maintenance terminal, which is characterized in that a current transformer wiring terminal is provided with a shell, wire interfaces are arranged on the shell, movable conductive lifting blocks are respectively arranged on the wire interfaces, an elastic reset mechanism is arranged between the conductive lifting blocks and the shell, and the elastic reset mechanism is arranged on the shell. The conductive sheet is arranged on the shell; at least the conductive lifting blocks share one conductive sheet, and the conductive lifting blocks and the conductive sheet are in contact conduction; an elastic push-off mechanism is arranged on the left side of the current transformer wiring terminal; the elastic push-off mechanism comprises at least one push rod, and the at least one push rod is provided with a reset spring mechanism. Therefore, when the detection equipment of the current transformer is disassembled, assembled and overhauled, the conducting wire interface can be conducted through the conductive lifting block, two ends of the secondary winding of the current transformer are short-circuited, power failure is not needed for overhauling, and continuous operation of a power system is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system technical field especially relates to a current transformer overhauls terminal. BACKGROUND

[0002] Current transformer converts the primary side large current into the secondary side small current to measure when working, the secondary side cannot be open circuit, because the current transformer secondary winding is more primary winding is less, if the current transformer secondary side is suddenly open circuit in the circuit operation, a relatively high voltage will be generated at the two ends of the disconnection, the relatively high voltage will make the current transformer winding interturn breakdown causes short circuit, more importantly, it will harm the operating personnel, therefore, the secondary current loop is prohibited to open circuit in operation.

[0003] The secondary current loop transmits the low current signal converted by the current transformer to the measuring instrument, protection relay and automation control equipment.

[0004] Under the traditional maintenance mode, when the detection equipment in the secondary current loop fails or needs to be maintained, power is usually required to be stopped for maintenance, which not only affects the continuous operation of the power system, but also may cause safety hazards and economic losses, and a hot plug technology is required to allow the detection equipment to be plugged in and out without affecting the secondary current loop in the working state of the power transmission system. SUMMARY

[0005] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments, which may be simplified or omitted in this section and the abstract and title of the application to avoid obscuring the purpose of this section, the abstract and the title of the application, and such simplification or omission cannot be used to limit the scope of the utility model.

[0006] In view of the problems existing in the prior art, the utility model is proposed.

[0007] To solve the above technical problems, the utility model provides the following technical scheme.

[0008] The secondary hot plug anti-opening circuit current maintenance terminal comprises a current transformer terminal and a detection device terminal.

[0009] The current transformer terminal has a shell, and the wire interface is arranged in the shell.

[0010] The shell is further provided with an up-and-down movable conductive lifting block, which is arranged above the wire interface;

[0011] The conductive lifting block and the shell are provided with an elastic reset mechanism, which drives the conductive lifting block to fall, and the conductive part of the falling conductive lifting block is in conductive contact with the conductive part of the wire interface;

[0012] The current transformer terminal further comprises a conductive sheet arranged on the shell, and the conductive sheet is provided with a conductive terminal, and the conductive lifting block is in contact with the conductive sheet for conduction;

[0013] The current transformer terminal is provided with an elastic pushing-off mechanism on the left side;

[0014] The elastic pushing-off mechanism comprises a push rod and a reset spring mechanism, the push rod is made of an insulating material, and the reset spring mechanism is arranged between the push rod and the shell;

[0015] The elastic force release direction of the reset spring mechanism is the direction in which the push rod pushes open the current transformer terminal and the detection device terminal;

[0016] At least the right end of the push rod is provided with an insertion end;

[0017] The conductive part of the conductive lifting block and the conductive part of the wire interface are provided with a plug-in interface, the plug-in interface is matched in size with the insertion end, and the insertion end is matched with the plug-in interface for plug-in;

[0018] The insertion end in the plug-in interface lifts the conductive lifting block, and the conductive part of the lifted conductive lifting block is disconnected from the conductive part of the wire interface.

[0019] After the current transformer terminal and the detection device terminal are plugged in, at least the push rod is pressed, at least the push rod is retracted, and the reset spring mechanism is in a force storage state; the insertion end is inserted into the plug-in interface, the conductive lifting block is pushed upward, and the conductive part of the conductive lifting block is insulated from the conductive part of the wire interface; after the locking mechanism between the current transformer terminal and the detection device terminal is unlocked, the current transformer terminal and the detection device terminal are separated under the reset thrust of the reset spring mechanism; during the separation of the current transformer terminal and the detection device terminal: first, the push rod moves to the left, the insertion end is pulled out of the plug-in interface, and the conductive part of the conductive lifting block is connected to the conductive part of the wire interface; then, the conductive plug is separated from the socket. In this way, the two ends of the secondary winding of the current transformer are respectively connected to the wire interface of one current transformer terminal, and the conductive sheets on the two current transformer terminals can be conductively connected to short-circuit the secondary winding of the current transformer.

[0020] By setting a conductive lifting block, when the conductive lifting block is in the reset state, the conductive part on the conductive lifting block is also connected to the conductive sheet, thereby realizing the connection of the wire interface. In this way, when the current transformer testing equipment is disassembled and repaired, the wire interface can be connected through the conductive lifting block, and the two ends of the secondary winding of the current transformer can be short-circuited without power outage for maintenance, thus ensuring the continuous operation of the power system.

[0021] Secondly, by setting a push rod, when disassembling or installing the current transformer terminals and the detection device terminals, during installation, the insertion end is inserted into the connector, pushing the conductive lifting block upward, thus achieving insulation between the conductive part of the conductive lifting block and the conductive part of the wire connector; during disassembly, the insertion end is pushed out of the connector by the elastic force of the elastic push-away mechanism, and the conductive lifting block is automatically reset by the elastic reset mechanism. In this way, during the disassembly, assembly, and maintenance of the current transformer detection equipment, the conductive lifting block can automatically connect the wire connector, automatically short-circuiting the two ends of the secondary winding of the current transformer, avoiding damage to the equipment or leaving safety hazards caused by worker operation errors that induce extremely high electromotive force in the secondary winding.

[0022] Preferably, the current transformer has at least two terminals, and the conductive plates on the at least two terminals are electrically connected to each other.

[0023] The conductive sheet is grounded. When disassembling the detection device, the two ends of the secondary winding can be short-circuited or grounded to ensure the safe and stable operation of the power system and the safety of personnel.

[0024] Preferably, the conductive lifting block is provided with a first spring as an elastic reset mechanism. One end of the first spring is connected to the conductive lifting block, and the other end is connected to the top of the housing. When the conductive lifting block rises, the first spring is compressed. When the first spring releases its compressed force, it pushes the conductive lifting block down. When the conductive lifting block moves upward into the raised state, the second spring is compressed, and the conductive part of the conductive lifting block remains insulated from the conductive part of the wire interface. When the insertion end of the push rod is pulled out from below the conductive lifting block, the first spring releases its compressed force, and the conductive lifting block moves downward into the reset state. The conductive part of the conductive lifting block contacts the conductive part of the wire interface, and the wire interface of the current transformer terminal is short-circuited. By setting the first spring as an elastic reset mechanism, the structure is simple and the cost is reduced. It can also quickly and stably reset the conductive lifting block to contact the conductive part of the wire interface when the insertion end of the push rod is pulled out, preventing unstable contact from causing a high induced electromotive force in the secondary coil.

[0025] Preferably, the push rod is provided with a second spring as an elastic push-away mechanism. One end of the second spring is connected to the push rod, and the other end is connected to the left side of the housing. The current transformer terminal and the detection device terminal are connected in a mating manner, and the second spring is compressed. The second spring releases the compressed elastic force to push the current transformer terminal and the detection device terminal apart. The second spring is used as an elastic push-away mechanism to ensure the rapid separation of the current transformer terminal and the detection device terminal. Slow separation when opening leads to unstable contact and the generation of induced electromotive force.

[0026] Preferably, the right end of the push rod is provided with a bevel as an insertion end for lifting the conductive lifting block; another bevel is provided below the conductive lifting block as a plug interface, and the other bevel of the conductive lifting block is arranged opposite to the bevel of the push rod insertion end; by providing the bevel and the other bevel, it is convenient for the insertion end to be inserted into the plug interface to lift the conductive lifting block and keep it insulated from the conductive part of the wire interface.

[0027] Preferably, the terminals of the detection device are provided with conductive pins, which are respectively located on the right side of the conductive plug; the terminals of the current transformer are provided with conductive contact pieces, which are located in the wire interface; the conductive plug is inserted into the socket, and the conductive pins make contact with the conductive pieces to conduct electricity, thereby connecting the terminals of the current transformer and the terminals of the detection device; through the conductive contact between the conductive pins and the conductive contact pieces, the terminals of the current transformer and the terminals of the detection device are electrically connected, facilitating a stable conductive connection.

[0028] Preferably, the length of the conductive pin inserted into the conductive contact piece is greater than the length of the push rod insertion end extending into the insertion interface below the conductive lifting block; this ensures that the conductive lifting block falls first, and the conductive part on the conductive lifting block contacts and connects with the conductive part of the wire interface first, and then the conductive pin separates from the conductive contact piece, ensuring that the secondary circuit of the current transformer will never be open-circuited, and ensuring the safety of the secondary hot-swappable anti-open-circuit current maintenance terminal during use.

[0029] Preferably, the conductive contact piece is an elastic conductive contact piece, and the elastic contraction position of the conductive contact piece is the contact position between the conductive pin and the conductive contact piece; the conductive contact piece is elastic, ensuring a stable conductive contact connection between the conductive pin and the conductive contact piece.

[0030] Preferably, the conductor pin is configured as a cylindrical cone shape; this facilitates insertion into the conductive contact piece of the conductor pin and achieves tight contact.

[0031] Preferably, the conductive lifting block is provided with a limiting ear, which limits the lowest falling position of the conductive lifting block. The limiting ear is located outside the housing. The conductive lifting block is also provided with a limiting block, which is located inside the current transformer terminal block. The limiting block limits the highest rising position of the conductive lifting block. This limits the upper and lower limit positions of the conductive lifting block, preventing the conductive lifting block from falling off or deforming the conductive part of the wire interface, and ensuring the stability of the secondary hot-swap open-circuit current protection terminal after multiple maintenance.

[0032] Preferably, a rotating plug is provided above the terminal block of the detection device, and the rotating plug is rotatably engaged with the terminal block of the detection device; a slot is provided on the housing, and the rotating plug is inserted into the slot; the rotating plug and the slot serve as a locking mechanism; the rotating plug is inserted into the slot to fix the current transformer terminal block and the terminal block of the detection device; the rotating plug disengages from the slot, and the push rod pushes the terminal block of the detection device away from the current transformer terminal block; the insertion of the rotating plug into the slot facilitates quick and stable locking of the terminal block of the detection device and the terminal block of the current transformer, and the disengagement of the rotating plug from the slot facilitates separation of the terminal block of the detection device and the terminal block of the current transformer, while the elastic pushing mechanism on the push rod ensures quick disengagement of the terminal block of the detection device. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0034] Figure 1 This is a schematic diagram of the separation structure between the current transformer wiring terminals and the detection device wiring terminals of this utility model.

[0035] Figure 2 This is a schematic diagram of the structure in which the terminals of the current transformer and the terminals of the detection device of this utility model are connected together.

[0036] Figure 3 This is a schematic diagram of the multi-piece splicing structure of the secondary hot-swappable maintenance terminal for preventing open-circuit current according to this utility model. Detailed Implementation

[0037] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0041] Example 1

[0042] refer to Figures 1-3 The secondary hot-swappable open-circuit current protection maintenance terminal includes a current transformer terminal 1 and a detection device terminal 2. The current transformer terminal has a wire interface 11, and a socket 12 is conductively connected to the left side of the wire interface 11. The detection device terminal 2 has a conductive plug 21. The conductive plug 21 and the socket 12 adopt a mating plug-in structure. A locking mechanism 22 is also provided between the current transformer terminal 1 and the detection device terminal 2.

[0043] The current transformer terminal block 1 has a housing 13, and the wire interface 11 is disposed in the housing 13;

[0044] The housing 13 is also provided with a vertically movable conductive lifting block 14, which is located above the wire interface 11.

[0045] An elastic reset mechanism is provided between the conductive lifting block 14 and the housing 13. The elastic reset mechanism drives the conductive lifting block 14 to fall, and the conductive part of the falling conductive lifting block 14 makes conductive contact with the conductive part of the wire interface 11.

[0046] The current transformer terminal also includes a conductive sheet 15 disposed on the housing 13, the conductive sheet 15 being provided with conductive terminals, and the conductive lifting block 14 maintaining contact with the conductive sheet 15 for conduction;

[0047] A spring-loaded push-off mechanism is provided on the left side of the current transformer terminal 1.

[0048] The elastic push-off mechanism includes a push rod 16 and a return spring mechanism. The push rod 16 is made of insulating material, and the return spring mechanism is disposed between the push rod 16 and the housing 13.

[0049] The direction of the release of the spring force of the reset spring mechanism is the direction in which the push rod 16 opens the current transformer terminal 1 and the detection device terminal 2;

[0050] At least the right end of the push rod 16 is provided with an insertion end 161;

[0051] A plug-in interface 141 is provided between the conductive part of the conductive lifting block 14 and the conductive part of the wire interface 11. The plug-in interface and the insertion end 161 are size-matched and are plugged into each other.

[0052] The insertion end 161 in the plug interface 141 lifts up the conductive lifting block 14, and the conductive part of the lifted conductive lifting block 14 is disconnected from the conductive part of the wire interface 11.

[0053] In the above design, after the current transformer terminal 1 and the detection device terminal 2 are plugged in, at least the push rod 16 is squeezed and retracted, and the reset spring mechanism is in a stored state; the insertion end 161 is inserted into the plug interface 141, pushing the conductive lifting block 14 upward, thereby achieving insulation between the conductive part of the conductive lifting block 14 and the conductive part of the wire interface 11; after the locking mechanism 22 between the current transformer terminal 1 and the detection device terminal 2 is unlocked, it is subjected to the reset thrust of the reset spring mechanism, and the current transformer terminal 1 and the detection device terminal 2 are separated; during the separation process of the current transformer terminal 1 and the detection device terminal 2: first, the push rod 16 moves to the left and the insertion end 161 is pulled out from the plug interface 141, and the conductive part of the conductive lifting block 14 is connected to the conductive part of the wire interface 11; then, the conductive plug 21 is separated from the plug 12. In this way, the two ends of the secondary winding of the current transformer are respectively connected to the wire interface 11 of the current transformer terminal. The conductive pieces 15 on the two current transformer terminals can be electrically connected by wires or welded together to short-circuit the secondary winding of the current transformer.

[0054] Firstly, by setting a conductive lifting block 14, when the conductive lifting block 14 is in the reset state, the conductive part on the conductive lifting block 14 is also connected to the conductive sheet 15, thereby realizing the connection of the wire interface 11. In this way, when the current transformer testing equipment is disassembled and repaired, the wire interface 11 can be connected through the conductive lifting block 14, and the two ends of the secondary winding of the current transformer can be short-circuited without power outage for maintenance, ensuring the continuous operation of the power system.

[0055] Secondly, by setting the push rod 16, when disassembling or installing the current transformer terminal 1 and the detection device terminal 2, during installation, the insertion end 161 is inserted into the connector 141, pushing the conductive lifting block 14 upward, thereby achieving insulation between the conductive part of the conductive lifting block 14 and the conductive part of the wire connector 11; during disassembly, the insertion end 161 is pushed out of the connector 141 by the elastic force of the elastic push-away mechanism, and the conductive lifting block 14 is automatically reset by the elastic reset mechanism. In this way, during the disassembly, assembly, and maintenance of the current transformer detection equipment, the conductive lifting block 14 can automatically connect the wire connector 11, automatically short-circuiting the two ends of the secondary winding of the current transformer, avoiding the damage to the equipment or the creation of safety hazards caused by worker operation errors that induce extremely high electrodynamics in the secondary winding.

[0056] It has five current transformer terminals 1, with conductive plates 15 on at least two current transformer terminals 1 electrically connected to each other. This allows the secondary hot-swappable open-circuit current protection maintenance terminals to connect multiple current transformer lines, and the integrated manufacturing facilitates the use of the circuit system.

[0057] The conductive sheet 15 is made of conductive metal and is a conductive terminal in its entirety.

[0058] The conductive sheet is grounded. When disassembling the detection device, the two ends of the secondary winding can be short-circuited or grounded to ensure the safe and stable operation of the power system and the safety of personnel.

[0059] A first spring is provided on the conductive lifting block 14 as an elastic reset mechanism. One end of the first spring is connected to the conductive lifting block 14, and the other end is connected to the top of the housing 13. When the conductive lifting block 14 rises, the first spring is compressed. When the first spring releases the compressed force, it pushes the conductive lifting block 14 down. When the conductive lifting block 14 moves upward into the raised state, the second spring 17 is compressed, and the conductive part of the conductive lifting block 14 remains insulated from the conductive part of the wire interface 11. When the insertion end 161 of the push rod 16 is pulled out from below the conductive lifting block 14, the first spring releases the compressed force, and the conductive lifting block 14 moves down into the reset state. The conductive part of the conductive lifting block 14 contacts the conductive part of the wire interface 11 and conducts electricity. The wire interface 11 of the current transformer terminal is short-circuited. By setting the first spring as an elastic reset mechanism, the structure is simple and the cost is reduced. It can also quickly and stably reset the conductive lifting block 14 to contact the conductive part of the wire interface 11 when the insertion end 161 of the push rod 16 is pulled out, preventing unstable contact from causing a high induced electromotive force in the secondary coil.

[0060] A second spring 17 is provided on the push rod 16 as an elastic push-away mechanism. One end of the second spring 17 is connected to the push rod 16, and the other end is connected to the left side of the housing 13. The current transformer terminal 1 and the detection device terminal 2 are connected in a mating manner. The second spring 17 stores and compresses. The second spring 17 releases the compressed elastic force to push the current transformer terminal 1 and the detection device terminal 2 apart. The second spring 17 is used as an elastic push-away mechanism to ensure the rapid separation of the current transformer terminal 1 and the detection device terminal 2. Slow separation when opening leads to unstable contact and the generation of induced electromotive force.

[0061] The right end of the push rod 16 is provided with a bevel, which serves as the insertion end 161 for lifting the conductive lifting block 14; another bevel is provided below the conductive lifting block 14 as a plug interface 141, and the other bevel of the conductive lifting block 14 is set opposite to the bevel of the insertion end 161 of the push rod 16; by providing the bevel and the other bevel, it is convenient for the insertion end 161 to be inserted into the plug interface 141 to lift the conductive lifting block 14 and keep it insulated from the conductive part of the wire interface 11.

[0062] The detection device terminal 2 is provided with conductive pins 23, which are respectively located on the right side of the conductive plug 21; the current transformer terminal 1 is provided with conductive contact pieces, which are located in the wire interface 11; the conductive plug 21 is inserted into the socket 12, and the conductive pins 23 and the conductive pieces 15 make contact and conduct electricity, so that the current transformer terminal 1 and the detection device terminal 2 are connected; through the conductive contact between the conductive pins 23 and the conductive contact pieces, the current transformer terminal 1 and the detection device terminal 2 are electrically connected, which facilitates a stable conductive connection.

[0063] The length of the conductive pin 23 inserted into the conductive contact piece is greater than the length of the insertion end 161 of the push rod 16 extending into the insertion interface 141 below the conductive lifting block 14; this ensures that the conductive lifting block 14 falls first, and the conductive part on the conductive lifting block 14 contacts and connects with the conductive part of the wire interface 11 first, and then the conductive pin 23 separates from the conductive contact piece, ensuring that the secondary circuit of the current transformer will never be open-circuited, and ensuring the safety of the secondary hot-swappable anti-open-circuit current maintenance terminal during use.

[0064] The conductive contact piece is an elastic conductive contact piece, and the position where the conductive pin 23 contacts the conductive contact piece is the position where the conductive contact piece contracts elastically. The conductive contact piece is elastic, which ensures that the conductive pin 23 has a stable conductive contact connection with the conductive contact piece.

[0065] The conductor pin is designed in a cylindrical-conical shape; this facilitates insertion into the conductive contact piece of the conductor pin and achieves a tight contact.

[0066] In use, when the current transformer needs to have its testing device removed for maintenance or replacement, the locking mechanism 22 unlocks, and the compression force of the second spring 17 pushes out the push rod 16, which pushes out the testing device terminal 2. The insertion end 161 of the push rod 16 is pulled out of the insertion interface 141, and the elastic reset mechanism drives the conductive lifting block 14 to reset. In the reset state, the conductive part of the conductive lifting block 14 contacts the conductive part of the wire interface 11, completing the conduction. The conductive lifting block 14 and the conductive sheet 15 remain in contact and conduct electricity, the secondary winding of the current transformer is short-circuited, and then the current transformer terminal 1 and the testing device terminal 2 are separated. Maintenance can be performed without power outage, ensuring the continuous operation of the power system. The length of the conductive pin 23 inserted into the conductive contact sheet is greater than the length of the insertion end 161 of the push rod 16 extending into the insertion interface 141 below the conductive lifting block 14, ensuring the safety of the secondary hot-swappable maintenance terminal when using it to prevent open-circuit current.

[0067] When the detection device is reinstalled in the current transformer, the conductive pin 23 is inserted into the conductive contact piece. The detection device is connected to the current transformer. The conductive lifting block 14 and the conductive piece 15 maintain short-circuit contact with the conductive part of the wire interface 11. Then, the push rod 16 is pushed and retracted by the terminal 2 of the detection device. At least the insertion end 161 is inserted into the insertion interface 141, pushing the conductive lifting block 14 upward to achieve insulation between the conductive part of the conductive lifting block 14 and the conductive part of the wire interface 11. Now, the detection device is reconnected and the conductive lifting block 14 is disconnected to prevent open circuit effects.

[0068] Example 2

[0069] refer to Figure 1 and Figure 2 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0070] The conductive lifting block 14 is provided with a limit ear, which limits the lowest falling position of the conductive lifting block 14. The limit ear is located outside the housing 13. The conductive lifting block 14 is also provided with a limit block, which is located inside the current transformer terminal 1. The limit block limits the highest rising position of the conductive lifting block 14. The upper and lower limit positions of the conductive lifting block 14 are limited to prevent the conductive lifting block 14 from falling off or deforming the conductive part of the wire interface 11, and to ensure the stability of the secondary hot-swap anti-open circuit current maintenance terminal after multiple maintenance.

[0071] A rotating plug is provided above the terminal block 2 of the detection device, and the rotating plug can be rotatably engaged with the terminal block 2 of the detection device; a slot is provided on the housing 13, and the rotating plug can be inserted into the slot; the rotating plug and the slot serve as a locking mechanism 22; the rotating plug is inserted into the slot to fix the terminal block 1 of the current transformer to the terminal block 2 of the detection device; the rotating plug is disengaged from the slot, and the push rod 16 pushes the terminal block 2 of the detection device to separate from the terminal block 1 of the current transformer; the insertion of the rotating plug into the slot facilitates the quick and stable locking of the terminal block 2 of the detection device to the terminal block 1 of the current transformer, and the disengagement of the rotating plug from the slot facilitates the separation of the terminal block 2 of the detection device to the terminal block 1 of the current transformer, while the elastic pushing mechanism on the push rod 16 ensures that the terminal block 2 of the detection device is quickly disengaged.

[0072] In use, when the conductive lifting block 14 slides up and down, the limiting ears and limiting blocks prevent the conductive lifting block 14 from falling off or deforming the conductive part of the wire interface 11. The rotating plug is inserted into the slot to facilitate quick and stable locking between the detection device terminal 2 and the solid current transformer terminal 1. The rotating plug is disengaged from the slot to facilitate separation between the detection device terminal 2 and the solid current transformer terminal 1. The reset spring mechanism on the push rod 16 ensures that the detection device terminal 2 is quickly disengaged.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A secondary hot-swappable open-circuit current protection maintenance terminal, comprising a current transformer terminal and a detection device terminal; the current transformer terminal has a wire interface, and a socket is conductively connected to the left side of the wire interface; the detection device terminal has a conductive plug; the conductive plug and the socket adopt a mating insertion structure; a locking mechanism is also provided between the current transformer terminal and the detection device terminal, characterized in that: The current transformer terminal block has a housing, and the wire interface is disposed in the housing; The housing is also provided with a conductive lifting block that moves up and down, and the conductive lifting block is located above the wire interface; An elastic reset mechanism is provided between the conductive lifting block and the housing. The elastic reset mechanism drives the conductive lifting block to fall, and the conductive part of the falling conductive lifting block makes conductive contact with the conductive part of the wire interface. The current transformer terminal block also includes a conductive sheet disposed on the housing, and the conductive sheet is provided with conductive terminals. The conductive lifting block maintains contact with the conductive sheet for conduction. A spring-loaded push-away mechanism is provided on the left side of the current transformer terminal block. The elastic push-off mechanism includes a push rod and a return spring mechanism. The push rod is made of insulating material, and the return spring mechanism is disposed between the push rod and the housing. The direction of the release of the spring force of the reset spring mechanism is the direction in which the push rod opens the terminals of the current transformer and the terminals of the detection device. At least the right end of the push rod is provided with an insertion end; A connector is provided between the conductive part of the conductive lifting block and the conductive part of the wire interface. The connector is sized to match the insertion end, and the insertion end is inserted into the connector. The insertion end in the connector lifts up the conductive lifting block, and the conductive part of the lifted conductive lifting block is disconnected from the conductive part of the wire interface.

2. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 1, characterized in that: It has at least two current transformer terminals, and the conductive pieces on the at least two current transformer terminals are electrically connected to each other.

3. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 1, characterized in that: The conductive sheet is grounded.

4. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 1, characterized in that: The conductive lifting block is provided with a first spring as an elastic reset mechanism. One end of the first spring is connected to the conductive lifting block, and the other end is connected to the top of the housing. The conductive lifting block rises, and the first spring is compressed. The first spring releases its compressed elastic force, propelling the conductive lifting block downwards.

5. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 1, characterized in that: The push rod is equipped with a second spring as an elastic pushing mechanism. One end of the second spring is connected to the push rod, and the other end is connected to the left side of the housing. The terminals of the current transformer and the terminals of the detection device are connected together, and the second spring is compressed. The second spring releases its compressed elastic force, pushing the current transformer terminals apart from the detection device terminals.

6. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 1, characterized in that: The right end of the push rod is provided with an inclined surface, which serves as the insertion end for lifting the conductive lifting block; The conductive lifting block has another inclined surface below it as an insertion interface, and the other inclined surface of the conductive lifting block is set opposite to the inclined surface of the push rod insertion end.

7. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 1, characterized in that: The detection device is equipped with conductive pins in its wiring terminals, and the conductive pins are respectively located on the right side of the conductive plug. The current transformer terminal is provided with a conductive contact piece, which is disposed in the wire interface; The conductive plug is inserted into the socket, and the conductive pin contacts the conductive plate to conduct electricity, thereby connecting the current transformer terminal to the detection device terminal.

8. The secondary hot-swappable open-circuit current protection maintenance terminal according to claim 7, characterized in that: The length of the conductive pin inserted into the conductive contact piece is greater than the length of the push rod insertion end extending into the interface below the conductive lifting block.

9. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 7, characterized in that: The conductive contact piece is an elastic conductive contact piece, and the elastic contraction position of the conductive contact piece is the contact position between the conductive pin and the conductive contact piece.

10. The maintenance terminal for secondary hot-swappable open-circuit current protection according to claim 1, characterized in that: The conductive lifting block is provided with a limiting ear, which is located outside the housing; The conductive lifting block is also provided with a limit block, which is located inside the current transformer terminal.

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