CN215299795U - Protection device of medium-voltage switch cabinet and medium-voltage switch cabinet - Google Patents
Protection device of medium-voltage switch cabinet and medium-voltage switch cabinet Download PDFInfo
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- CN215299795U CN215299795U CN202121301822.5U CN202121301822U CN215299795U CN 215299795 U CN215299795 U CN 215299795U CN 202121301822 U CN202121301822 U CN 202121301822U CN 215299795 U CN215299795 U CN 215299795U
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Abstract
The embodiment of the utility model provides a pair of medium voltage switchgear's protection device and medium voltage switchgear, wherein, this protection device includes: the protection circuit comprises a shell, a protection circuit control board and a plug-in terminal module, wherein the plug-in terminal module is clamped with a plug-in groove of the protection circuit control board and comprises a mutual inductor plug-in terminal; the protection circuit control board and the plug-in terminal module are arranged in a shell, and a groove matched with the plug-in terminal of the mutual inductor is formed in the shell; the protection circuit control board is used for being connected with a mutual inductor in the medium-voltage switch cabinet through a mutual inductor plug-in terminal so as to monitor mutual inductance electric energy of the mutual inductor. The protection device can be directly connected with the electric device and the mutual inductor in the medium-voltage switch cabinet through the plug-in terminal module of the protection device, the protection device is not required to be connected with the electric device and the mutual inductor through the fixed terminal strip, the number of internal wiring of the medium-voltage switch cabinet is effectively reduced, wiring complexity is reduced, and production and maintenance efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of the medium voltage switchgear protection technique and specifically relates to a protection device and medium voltage switchgear of medium voltage switchgear are related to.
Background
The medium-voltage switch cabinet is an electrical device, mainly used for opening, closing, controlling and protecting the electrical device in the process of generating, transmitting, distributing and converting electric energy of an electric power system, and the components in the medium-voltage switch cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like, and are mainly suitable for various different occasions such as power plants, transformer substations, petrochemical industry, steel rolling metallurgy, light industrial textiles, factory and mining enterprises, residential quarters, high-rise buildings and the like.
Protection device among the current medium voltage switchgear is connected with fixed terminal row earlier, and reuse fixed terminal row is connected with each electrical component to make protection device protect each protection device, because fixed terminal row wiring is more and easy not hard up and drop, designer and later stage fortune dimension personnel need check every wiring one by one, cause production and maintenance efficiency lower.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a protection device and medium voltage switchgear of medium voltage switchgear to reduce the inside wiring of medium voltage switchgear, improve production and maintenance efficiency.
In a first aspect, an embodiment of the present invention provides a protection device for a medium voltage switchgear, wherein the protection device includes: the protection circuit comprises a shell, a protection circuit control board and a plug-in terminal module, wherein the plug-in terminal module is clamped with a plug-in groove of the protection circuit control board and comprises a mutual inductor plug-in terminal; the protection circuit control board and the plug-in terminal module are arranged in a shell, and a groove matched with the plug-in terminal of the mutual inductor is formed in the shell; the protection circuit control board is used for being connected with a mutual inductor in the medium-voltage switch cabinet through a mutual inductor plug-in terminal so as to monitor mutual inductance electric energy of the mutual inductor.
With reference to the first aspect, embodiments of the present invention provide a first possible implementation manner of the first aspect, wherein the transformer plug-in terminals include a current transformer plug-in terminal and a voltage transformer plug-in terminal; the current transformer plug-in terminal is used for being connected with a current transformer of a transformer; the voltage transformer plug-in terminal is used for being connected with a voltage transformer of the transformer.
With reference to the first aspect, embodiments of the present invention provide a second possible implementation manner of the first aspect, wherein a jack-type current test terminal is disposed at a corresponding position on a side surface of the transformer plug-in terminal; the current test terminal is used for connecting a short circuit line so as to short circuit the plug-in terminal of the mutual inductor.
With reference to the first aspect, embodiments of the present invention provide a third possible implementation manner of the first aspect, wherein the plug-in terminal module further includes a signal input plug-in terminal; the protection circuit control board is used for being connected with a circuit breaker, a disconnecting switch and grounding switch equipment in the medium-voltage switch cabinet through the signal plug-in terminal so as to monitor the opening and closing positions and the working states of the circuit breaker, the disconnecting switch and the grounding switch equipment.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the plug-in terminal module further includes a switching-off and switching-on circuit plug-in terminal and a switching-off and switching-on input plug-in terminal; the opening and closing input plug-in terminal is connected with external equipment through a fixed terminal row in the medium-voltage switch cabinet; the opening and closing circuit plug-in terminal is connected with the circuit breaker; the protection circuit control board is also used for receiving a control signal sent by external equipment so as to execute control operation corresponding to the control signal on the circuit breaker; wherein the control operation comprises at least one of: closing operation and opening operation.
With reference to the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the plug-in terminal module further includes an output plug-in terminal; the output plug-in terminal comprises a signal output plug-in terminal, a time-setting input plug-in terminal and a network port plug-in terminal; the signal outlet plug-in terminal is connected with external public control equipment or a public measurement and control device through the fixed terminal row so as to send an alarm signal of the protection circuit control board to the public measurement and control device; the time synchronization input plug-in terminal is connected with the time synchronization device through the fixed terminal row so as to time synchronize the protection circuit control board; the network port plug-in terminal is connected with the computer monitoring system through the fixed terminal strip so as to realize the communication between the computer monitoring system and the protection circuit control board.
With reference to the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the plug-in terminal module further includes a power plug-in terminal; the power plug-in terminal is connected with an external power supply through the fixed terminal strip so as to supply power to the protection circuit control board.
In combination with the sixth possible implementation manner of the first aspect, an embodiment of the present invention provides the seventh possible implementation manner of the first aspect, wherein the mutual inductor plug-in terminal, the signal switch-in plug-in terminal, the switch-off and switch-on circuit plug-in terminal, the switch-off and switch-on input plug-in terminal, the output plug-in terminal and the power plug-in terminal are spring type wiring terminals.
In combination with the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein a terminal disconnection warning lamp is installed at a corresponding position of each plug-in terminal of the plug-in terminal module, and the terminal disconnection warning lamp is connected to a power supply end of the protection circuit control board to indicate whether a loop where each plug-in terminal is located is connected.
In a second aspect, the embodiment of the present invention further provides a medium voltage switch cabinet, wherein the medium voltage switch cabinet includes the above-mentioned protection device.
The embodiment of the utility model provides a following beneficial effect has been brought:
the embodiment of the utility model provides a pair of medium voltage switchgear's protection device and medium voltage switchgear, wherein, this protection device includes: the protection circuit comprises a shell, a protection circuit control board and a plug-in terminal module, wherein the plug-in terminal module is clamped with a plug-in groove of the protection circuit control board and comprises a mutual inductor plug-in terminal; the protection circuit control board and the plug-in terminal module are arranged in a shell, and a groove matched with the plug-in terminal of the mutual inductor is formed in the shell; the protection circuit control board is used for being connected with a mutual inductor in the medium-voltage switch cabinet through a mutual inductor plug-in terminal so as to monitor mutual inductance electric energy of the mutual inductor. The protection device can be directly connected with the electric device and the mutual inductor in the medium-voltage switch cabinet through the plug-in terminal module of the protection device, the protection device is not required to be connected with the electric device and the mutual inductor through the fixed terminal strip, the number of internal wiring of the medium-voltage switch cabinet is effectively reduced, wiring complexity is reduced, and production and maintenance efficiency is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a protection device for a medium voltage switchgear provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another protection device for a medium voltage switchgear according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a medium voltage switchgear provided in an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
At present, a protection device in a medium-voltage switch cabinet is connected with each protection device through a fixed terminal strip, so that the number of internal wiring of the medium-voltage switch cabinet is increased; in order to reduce the inside wiring of middling pressure cubical switchboard, improve production and maintenance efficiency, the embodiment of the utility model provides a pair of protection device and middling pressure cubical switchboard of middling pressure cubical switchboard can make protection device directly be connected with electric device and mutual-inductor in the middling pressure cubical switchboard through the plug-in components terminal module of self, and need not to arrange protection device and electric device and mutual-inductor through fixed terminal and be connected, effectively reduced the inside wiring quantity of middling pressure cubical switchboard, reduce the wiring complexity, and then improved production and maintenance efficiency.
For the convenience of understanding the present embodiment, the protection device of the medium voltage switchgear disclosed in the embodiments of the present invention will be described in detail first.
The embodiment of the utility model provides a protection device of medium voltage switchgear, as the schematic structure diagram of the protection device of medium voltage switchgear that fig. 1 is shown, this protection device includes: a housing (not shown in fig. 1), a protection circuit control board 100 and a plug-in terminal module 101, wherein the plug-in terminal module 101 is clamped with a plug-in groove of the protection circuit control board 100, and the plug-in terminal module 101 comprises a transformer plug-in terminal 102; the protection circuit control board 100 and the plug-in terminal module 101 are disposed in a housing provided with a groove (not shown in fig. 1) that matches the transformer plug-in terminal 102.
In general, a compression spring is provided inside each of the plug-in groove and the groove matching with the transformer plug-in terminal 102, so that the plug-in terminal module 101 is in a compression state with the plug-in groove and the groove, and the contact reliability is higher.
Specifically, the protection circuit control board 100 is used for connecting with a transformer in a medium voltage switch cabinet through a transformer plug-in terminal 102 to monitor mutual inductance electric energy of the transformer.
In this embodiment, the protection circuit control board 100 is directly connected to a transformer line that needs protection and monitoring through the transformer plug-in terminal 102, and the protection circuit control board 100 does not need to be connected to a fixed terminal row in the medium voltage switchgear by a wire first, and then connects the fixed terminal row to the transformer line, so as to realize the connection between the protection circuit control board 100 and the transformer.
The embodiment of the utility model provides a pair of protection device of medium voltage switchgear, wherein, this protection device includes: the protection circuit comprises a shell, a protection circuit control board and a plug-in terminal module, wherein the plug-in terminal module is clamped with a plug-in groove of the protection circuit control board and comprises a mutual inductor plug-in terminal; the protection circuit control board and the plug-in terminal module are arranged in a shell, and a groove matched with the plug-in terminal of the mutual inductor is formed in the shell; the protection circuit control board is used for being connected with a mutual inductor in the medium-voltage switch cabinet through a mutual inductor plug-in terminal so as to monitor mutual inductance electric energy of the mutual inductor. The protection device can be directly connected with a protection device mutual inductor in a medium voltage switch cabinet through the plug-in terminal module of the protection device, the protection device is not required to be connected with the mutual inductor through the fixed terminal strip, the internal wiring quantity of the medium voltage switch cabinet is effectively reduced, the wiring complexity is reduced, and the production and maintenance efficiency is further improved.
Generally, the transformers in the medium voltage switchgear include a current transformer and a voltage transformer, and therefore, the corresponding terminals of the transformer plug-in terminals are respectively connected with the current transformer and the voltage transformer so as to monitor the current of the current transformer and the voltage of the voltage transformer. Therefore, on the basis of fig. 1, fig. 2 shows a schematic structural diagram of another protection device of a medium voltage switchgear, as shown in fig. 2, the transformer plug-in terminal 102 includes a current transformer plug-in terminal 200 and a voltage transformer plug-in terminal 201; the current transformer plug-in terminal 200 is used for being connected with a current transformer 202 of a transformer; the voltage transformer plug-in terminal 201 is used for connection with a voltage transformer 203 of a transformer.
During specific use, the protection circuit control board 100 is connected with the current transformer 202 through the current transformer plug-in terminal 200, receives current generated on a loop where the current transformer 202 is located, monitors the current, and when the current exceeds a current protection threshold value, the protection circuit control board 100 protects a high-voltage power supply loop.
Similarly, the protection circuit control board 100 is connected to the voltage transformer 203 through the plug-in terminal 201 of the voltage transformer, receives the voltage generated on the loop where the voltage transformer 203 is located, monitors the voltage, and when the voltage exceeds the voltage protection threshold, the protection circuit control board 100 protects the high-voltage power supply loop.
Generally, a jack type current test terminal is arranged at a position corresponding to the side surface of a transformer plug-in terminal; the current test terminal is used for connecting a short circuit line so as to short circuit the plug-in terminal of the mutual inductor.
When the current transformer plug-in terminal 200 and/or the voltage transformer plug-in terminal 201 of the transformer plug-in terminal 102 are tested or a short-circuit plug-in terminal is required for connecting the transformer, a short-circuit line can be inserted into the current test terminal to short-circuit the current transformer plug-in terminal 200 and/or the voltage transformer plug-in terminal 201.
As shown in fig. 2, the card terminal module 101 further includes signal input card terminals 204; the protection circuit control board 100 is used for being connected with a circuit breaker 205, a disconnecting switch 206 and a grounding switch device 207 in a medium-voltage switch cabinet through a signal plug-in terminal 204 so as to monitor the opening and closing positions and the working states of the circuit breaker 205, the disconnecting switch 206 and the grounding switch device 207.
In actual use, the protection circuit control board 100 of the protection device is connected with the circuit breaker 205, the disconnecting switch 206 and the grounding switch device 207 in the medium voltage switch cabinet through the signal plug-in terminal 204, so as to transmit the switching positions and the fault alarm signals of the circuit breaker 205, the disconnecting switch 206 and the grounding switch device 207 to the protection circuit control board 100, so that the switching positions and the working states of the circuit breaker 205, the disconnecting switch 206 and the grounding switch device 207 are monitored through the switching positions, the fault alarm signals and other information by the protection circuit control board 100, and the operation safety of the circuit breaker 205, the disconnecting switch 206 and the grounding switch device 207 is ensured.
As shown in fig. 2, the plug-in terminal module 101 further includes an opening/closing circuit plug-in terminal 208 and an opening/closing input plug-in terminal 209; the switching-on/off input plug-in terminal 209 is connected with an external device 211 through a fixed terminal row 210 in the medium-voltage switch cabinet; the opening and closing circuit plug-in terminal 208 is connected with the circuit breaker 205; the protection circuit control board 100 is further configured to receive a control signal sent by the external device 211, so as to perform a control operation corresponding to the control signal on the circuit breaker 205; wherein the control operation comprises at least one of: closing operation and opening operation.
The external device 211 is a common measurement and control device, a safety and stability device or a bus protection device, and when the protection circuit control board 100 is connected to the LCU device, the safety and stability device or the bus protection device through the switching input plug-in terminal 209 and the fixed terminal row 210, it can receive a control signal sent by the external device 211, where the control signal is a switching-on signal and/or a switching-off signal, and the protection circuit control board 100 performs a remote switching-on operation and/or a remote switching-off operation on the circuit breaker through the switching circuit plug-in terminal according to the control signal.
As shown in fig. 2, the card terminal module 101 further includes output card terminals 212; the output plug-in terminal 212 includes a signal output plug-in terminal 213, a pair time input plug-in terminal 214, and a network port plug-in terminal 215; the signal outlet plug-in terminal 213 is connected with the common measurement and control device 216 through the fixed terminal strip 210 to send the alarm signal of the protection circuit control board 100 to the common measurement and control device; so that the user can know the working state of the current protection circuit control board 100 through the common measurement and control device.
The time setting input plug-in terminal 214 is connected with the time setting device 217 through the fixed terminal row 210 to set time of the protection circuit control board 100; so that the time of the protection circuit control board 100 is synchronized with the time of the time tick device 217.
The network port plug-in terminal 215 is connected to the computer monitoring system 218 through the fixed terminal strip 210 to realize the communication between the computer monitoring system 218 and the protection circuit control board 100, so that a user can control and monitor the protection circuit control board 100 through the computer monitoring system 218.
As shown in fig. 2, the card terminal module 101 further includes power card terminals 219; the power plug-in terminal 219 is connected with the external power supply 220 through the fixed terminal strip 210 to realize power supply to the protection circuit control board 100 so that the protection circuit control board 100 can normally operate.
In this embodiment, each plug-in terminal on the plug-in terminal module, such as the transformer plug-in terminal, the signal input plug-in terminal, the switching circuit plug-in terminal, the switching input plug-in terminal, the output plug-in terminal and the power supply plug-in terminal, is a spring type connection terminal.
The spring force clamp is arranged in each plug-in terminal, and the spring force clamp control end above the plug-in terminal is pressed down only by using a wiring tool, so that the spring force clamp is opened, the wiring head extends into the spring force clamp, and the wiring tool is loosened, so that the spring force clamp can clamp the wire, the wiring is convenient, and the reliability is higher;
in general, in order to find out whether the connection of the plug-in terminal module is bad or disconnected in time to avoid accidents, in this embodiment, a terminal disconnection warning lamp is installed at a position corresponding to each plug-in terminal of the plug-in terminal module, and the terminal disconnection warning lamp is connected to the power supply terminal of the protection circuit control board to indicate whether the circuit where each plug-in terminal is located is connected. The terminal disconnection warning lamp is turned on when the wiring of the plug-in terminal is in poor contact or disconnected, or turned off to indicate that the wiring is abnormal by a user.
The embodiment of the utility model provides a still provide a medium voltage switchgear, fig. 3 shows a medium voltage switchgear's schematic structure diagram, as shown in fig. 3, medium voltage switchgear 300 includes foretell protection device 301. The protection device 301 is used to protect and monitor various protection devices, such as a transformer, a circuit breaker, a disconnecting switch, an earthing switch device, and the like, in the medium voltage switchgear 300, so that the medium voltage switchgear 300 can work normally.
The embodiment of the utility model provides a medium voltage switchgear, the protection device with the medium voltage switchgear that above-mentioned embodiment provided has the same technical characteristic, so also can solve the same technical problem, reach the same technological effect.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the medium voltage switchgear described above may refer to the corresponding process in the foregoing embodiment of the protection device for a medium voltage switchgear, and will not be described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A protection device for medium voltage switchgear, characterized in that it comprises: the protection circuit comprises a shell, a protection circuit control board and a plug-in terminal module, wherein the plug-in terminal module is clamped with a plug-in groove of the protection circuit control board, and comprises a mutual inductor plug-in terminal;
the protection circuit control board and the plug-in terminal module are arranged in the shell, and a groove matched with the plug-in terminal of the mutual inductor is formed in the shell;
the protection circuit control board is used for being connected with a mutual inductor in the medium-voltage switch cabinet through the mutual inductor plug-in terminal so as to monitor mutual inductance electric energy of the mutual inductor.
2. The protection device of claim 1, wherein the transformer package terminals include current transformer package terminals and voltage transformer package terminals;
the current transformer plug-in terminal is used for being connected with a current transformer of the transformer;
and the voltage transformer plug-in terminal is used for being connected with a voltage transformer of the transformer.
3. The protection device according to claim 1, characterized in that a jack type current test terminal is provided at a position corresponding to a side surface of the transformer plug-in terminal;
the current test terminal is used for connecting a short circuit line so as to enable the mutual inductor plug-in terminal to be in short circuit.
4. The protection device of claim 1, wherein said plug terminal module further comprises signal opening plug terminals;
the protection circuit control board is used for being connected with a circuit breaker, a disconnecting switch and grounding switch equipment in the medium-voltage switch cabinet through the signal plug-in terminal so as to monitor the opening and closing positions and the working state of the circuit breaker, the disconnecting switch and the grounding switch equipment.
5. The protection device of claim 4, wherein the plug terminal module further comprises a switch-off/switch-on circuit plug-in terminal and a switch-off/switch-on input plug-in terminal;
the opening and closing input plug-in terminal is connected with external equipment through a fixed terminal row in the medium-voltage switch cabinet; the opening and closing circuit plug-in unit terminal is connected with the circuit breaker;
the protection circuit control board is also used for receiving a control signal sent by the external equipment so as to execute a control operation corresponding to the control signal on the circuit breaker; wherein the control operation comprises at least one of: closing operation and opening operation.
6. The protection device of claim 5, wherein the card terminal module further comprises output card terminals;
the output plug-in terminal comprises a signal output plug-in terminal, a time-setting input plug-in terminal and a network port plug-in terminal;
the signal outlet plug-in terminal is connected with external public control equipment or a public measurement and control device through the fixed terminal strip so as to send the alarm signal of the protection circuit control board to the public measurement and control device;
the time synchronization input plug-in terminal is connected with a time synchronization device through the fixed terminal row so as to time the protection circuit control board;
the network port plug-in terminal is connected with a computer monitoring system through the fixed terminal strip so as to realize the communication between the computer monitoring system and the protection circuit control board.
7. The protection device of claim 6, wherein the card terminal module further comprises power card terminals;
the power plug-in terminal is connected with an external power supply through the fixed terminal strip so as to supply power to the protection circuit control board.
8. The protection device of claim 7, wherein the transformer plug-in terminal, the signal switch-in plug-in terminal, the switch-off and switch-on circuit plug-in terminal, the switch-off and switch-on input plug-in terminal, the output plug-in terminal and the power plug-in terminal are all spring type wiring terminals.
9. The protection device according to claim 1, wherein a terminal disconnection warning lamp is installed at a position corresponding to each card terminal of the card terminal module, and the terminal disconnection warning lamp is connected to the power supply terminal of the protection circuit control board to indicate whether a loop in which each card terminal is located is closed.
10. Medium voltage switchgear, characterized in that it comprises a protection device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121301822.5U CN215299795U (en) | 2021-06-10 | 2021-06-10 | Protection device of medium-voltage switch cabinet and medium-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121301822.5U CN215299795U (en) | 2021-06-10 | 2021-06-10 | Protection device of medium-voltage switch cabinet and medium-voltage switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN215299795U true CN215299795U (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121301822.5U Active CN215299795U (en) | 2021-06-10 | 2021-06-10 | Protection device of medium-voltage switch cabinet and medium-voltage switch cabinet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649868A (en) * | 2022-04-21 | 2022-06-21 | 宁夏凯晨电气集团有限公司 | Measurement and control device and electrical cabinet |
| CN116587256A (en) * | 2023-07-17 | 2023-08-15 | 江苏新惕姆智能装备有限公司 | Valve island for robot integrated clamp |
-
2021
- 2021-06-10 CN CN202121301822.5U patent/CN215299795U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649868A (en) * | 2022-04-21 | 2022-06-21 | 宁夏凯晨电气集团有限公司 | Measurement and control device and electrical cabinet |
| CN116587256A (en) * | 2023-07-17 | 2023-08-15 | 江苏新惕姆智能装备有限公司 | Valve island for robot integrated clamp |
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