CN211578671U - One-time and two-time integrated on-column circuit breaker - Google Patents

One-time and two-time integrated on-column circuit breaker Download PDF

Info

Publication number
CN211578671U
CN211578671U CN202020473082.2U CN202020473082U CN211578671U CN 211578671 U CN211578671 U CN 211578671U CN 202020473082 U CN202020473082 U CN 202020473082U CN 211578671 U CN211578671 U CN 211578671U
Authority
CN
China
Prior art keywords
box
circuit breaker
wireless temperature
control system
sensing signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN202020473082.2U
Other languages
Chinese (zh)
Inventor
潘雷
潘大海
陈玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Ludian Intelligent Technology Co ltd
Original Assignee
Nanjing Ludian Intelligent Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Ludian Intelligent Technology Co ltd filed Critical Nanjing Ludian Intelligent Technology Co ltd
Priority to CN202020473082.2U priority Critical patent/CN211578671U/en
Application granted granted Critical
Publication of CN211578671U publication Critical patent/CN211578671U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model relates to a circuit breaker on secondary fusion complete set post, its technical scheme's main points are: contain the circuit breaker body that sets up on the pole, be equipped with input, output and mechanism case on the circuit breaker body respectively, the below of circuit breaker body is equipped with the control box, be equipped with control system in the control box, be equipped with wireless temperature sensor on input and the output respectively, wireless temperature sensor is used for monitoring the temperature of input and output and sends the sensing signal and give control system, control system is used for receiving wireless temperature sensor's sensing signal and sends warning signal to backstage fortune dimension platform. The utility model discloses the technical effect who has is: the temperature measurement can be carried out at the wire inlet end and the wire outlet end of the circuit breaker, so that the abnormal conditions of the circuit breaker can be known in time by a backstage operation and maintenance personnel and the maintenance can be carried out.

Description

One-time and two-time integrated on-column circuit breaker
Technical Field
The utility model belongs to the technical field of the technique of circuit breaker and specifically relates to a circuit breaker on complete set post is fused to a secondary.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like.
Publication number CN209747426U discloses a primary and secondary fused pole upper circuit breaker, which comprises two electric poles, two bearing beams, two fixing assemblies, a circuit breaker body, a plurality of connecting screws and connecting nuts; the fixing component comprises an upper anchor ear, a lower anchor ear, an extension angle plate and a connecting plate; the two extending angle plates are oppositely arranged, the extending angle plates are horizontally arranged, and one ends of the extending angle plates are fixed on the upper hoop; the connecting plate has two, the one end rigid coupling of connecting plate is on extending the scute and other end rigid coupling in staple bolt down, the both ends of spandrel girder are fixed in respectively on two fixed subassemblies go up two relative extension scutes, the circuit breaker body supports on two spandrel girders, the through-hole that supplies connecting screw to pass is seted up to the backup pad below, the spandrel girder is seted up along length direction interval and is supplied the via hole that connecting screw passed, connecting screw passes the through-hole in the backup pad in proper order and the via hole on the spandrel girder, coupling nut cooperates in the connecting screw lower extreme.
The above prior art solutions have the following drawbacks: the inlet wire end and the outlet wire end of the pole-mounted circuit breaker can show abnormal high-temperature states when the circuit breaker breaks down or is connected in a loose mode and other abnormal conditions, and the pole-mounted circuit breaker is not provided with a temperature measuring device at the inlet wire end and the outlet wire end and is difficult to feed back the abnormal conditions of the circuit breaker in time.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a circuit breaker on complete set post is fused to a secondary, its advantage: the temperature measurement can be carried out at the wire inlet end and the wire outlet end of the circuit breaker, so that the abnormal conditions of the circuit breaker can be known in time by a backstage operation and maintenance personnel and the maintenance can be carried out.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a circuit breaker on one secondary fuses complete set post, contains the circuit breaker body that sets up on the pole, be equipped with input, output and mechanism case on the circuit breaker body respectively, the below of circuit breaker body is equipped with the control box, be equipped with control system in the control box, be equipped with wireless temperature sensor on input and the output respectively, wireless temperature sensor is used for monitoring the temperature of input and output and sends the sensing signal and give control system, control system is used for receiving wireless temperature sensor's sensing signal and sends warning signal to backstage fortune dimension platform.
Through the technical scheme, wireless temperature sensor can carry out incessant detection to the temperature of the input of circuit breaker body and output terminal department, when circuit breaker body trouble or junction are not hard up etc. abnormal conditions lead to input and output temperature unusual rising to exceed wireless temperature sensor default, wireless temperature sensor can be triggered and send sensing signal for control system, can send warning signal after the sensing signal that control signal received and come from wireless temperature sensor and give backstage fortune dimension platform, so that backstage fortune dimension personnel can in time learn this circuit breaker body abnormal conditions and maintain.
The utility model discloses further set up to: the mechanism is characterized in that a wireless temperature and humidity sensor is arranged in the mechanism box and used for monitoring the temperature and humidity in the mechanism box and sending a sensing signal to the control system, and the control system is further used for receiving the sensing signal of the wireless temperature and humidity sensor and sending a warning signal to the background operation and maintenance platform.
Through the technical scheme, the wireless temperature and humidity sensor can continuously detect the temperature and the humidity in the mechanism box, when the abnormal condition occurs in the mechanism box, the temperature or the humidity inside the mechanism box exceeds the preset value of the temperature and humidity sensor, the wireless temperature and humidity sensor can be triggered and sends a sensing signal to the control system, the control signal can also send a warning signal to the background operation and maintenance platform after receiving the sensing signal from the wireless temperature and humidity sensor, and therefore the background operation and maintenance personnel can timely know that the abnormal condition occurs in the mechanism box of the circuit breaker body and maintain the circuit breaker.
The utility model discloses further set up to: and wireless data transmission is carried out between the wireless temperature sensor and the control system and between the wireless temperature and humidity sensor and the control system in a 433M mode.
Through above-mentioned technical scheme, 433M wireless transmission mode has characteristics such as low power dissipation, propagation distance are far away and transmission process is difficult for receiving overcast and rainy weather interference to wireless temperature sensor and wireless temperature and humidity sensor can be stable send the sensing signal to control system department, thereby strengthened the stability among the wireless transmission process.
The utility model discloses further set up to: the wireless temperature and humidity sensor is further provided with an external antenna, a connecting hole is formed in the wall of the mechanism box, and the external antenna partially extends out of the mechanism box from the connecting hole.
Through the technical scheme, the sensing signal generated when the wireless temperature and humidity sensor is triggered can be transmitted to the control system through the external antenna; the arrangement that the external antenna part extends out of the mechanism box reduces the possibility that the sensing signals of the wireless temperature and humidity sensor are shielded by the shell of the mechanism box and are difficult to stably transmit to a control system.
The utility model discloses further set up to: the connecting hole is provided with a rubber block for sealing the connecting hole, and the rubber block is provided with a wire outlet hole matched with the outer periphery of the transmitting end of the external antenna.
Through the technical scheme, the rubber block is arranged to play a role in sealing the connecting hole, so that external moisture and dust are difficult to enter the mechanism box from the connecting gap between the connecting hole and the external antenna, and the dustproof and waterproof effects inside the mechanism box are enhanced.
The utility model discloses further set up to: the mechanism is characterized in that a dehumidifying box is arranged in the mechanism box, and a dehumidifying agent is arranged in the dehumidifying box.
Through above-mentioned technical scheme, the desiccant in the dehumidification box can absorb the moisture of mechanism incasement for mechanism incasement portion can keep the state of dry relatively, has reduced mechanism incasement portion equipment because of the incasement is too moist and has damaged or the possibility of trouble, so that mechanism case can be stable open and shut the floodgate operation to the circuit breaker body.
The utility model discloses further set up to: the utility model discloses a dehumidification box, including mechanism case, dehumidification box, fixing plate, the lateral wall of mechanism case is equipped with the backup pad, the dehumidification box erects in the backup pad, still seted up on the lateral wall of mechanism case with dehumidification box assorted disassembly hole, the opening part that the backup pad was kept away from in the disassembly hole has seted up the heavy groove, the heavy inslot joint have with heavy groove assorted fixed plate, the terminal surface that the dehumidification box was towards disassembly hole is connected with the fixed plate, still be equipped with the handle on the terminal surface that the fixed plate deviates from the dehumidification box.
Through above-mentioned technical scheme, the maintainer is when overhauing the circuit breaker body, and the accessible is taken out fixed plate and dehumidification box from the mechanism incasement with the mode that grasps the handle with the hand to the maintainer can change the desiccant regularly.
The utility model discloses further set up to: the fixed plate is further provided with two connecting plates which are respectively connected onto the mechanism box through bolts, the end face, facing the dehumidification box, of each connecting plate is further provided with a sealing gasket matched with the corresponding sinking groove, and the sealing gaskets are abutted to the corresponding sinking grooves.
Through the technical scheme, the sealing performance of the disassembly hole is enhanced due to the arrangement of the sealing gasket, and the possibility that moisture or dust enters the mechanism box from the connecting gap between the fixing plate and the mechanism box is reduced; meanwhile, the connecting plate and the mechanism box are connected through the bolts, so that the effect of reinforcing the connection strength between the fixing plate and the mechanism box is achieved, and the possibility that the sealing performance of the dismounting hole is influenced by the fact that the fixing plate drives the sealing gasket to deviate in the direction away from the mechanism box under the action of external force is reduced.
To sum up, the utility model discloses a beneficial technological effect does:
1. the wireless temperature sensor can measure the temperature of the wire inlet end and the wire outlet end of the circuit breaker body, so that a backstage operator can know the abnormal condition of the circuit breaker body in time and maintain the circuit breaker body;
2. the wireless temperature and humidity sensor can detect the temperature and the humidity of the mechanism box, so that a backstage operation and maintenance worker can know the abnormal condition of the mechanism box in time and maintain the mechanism box;
3. the arrangement of the dehumidification box reduces the possibility that internal equipment of the mechanism box is damaged or broken due to over-damp in the box, so that the mechanism box can stably carry out switching operation on the circuit breaker body.
Drawings
Fig. 1 is a schematic view of the overall structure of the present embodiment.
Fig. 2 is a schematic structural diagram of the circuit breaker body in the present embodiment.
Fig. 3 is a schematic cross-sectional view of the external antenna according to the present embodiment.
Fig. 4 is a schematic diagram of a framework of the sensing signal trend in the present embodiment.
Fig. 5 is a schematic cross-sectional view of the dehumidifying cartridge according to the present embodiment.
Reference numerals: 1. an electric pole; 2. a circuit breaker body; 3. an input end; 4. an output end; 5. a mechanism box; 6. a control box; 7. a wireless temperature sensor; 8. a wireless temperature and humidity sensor; 9. an external antenna; 10. connecting holes; 11. a rubber block; 12. a wire outlet hole; 13. a dehumidification box; 14. a moisture remover; 15. a support plate; 16. disassembling the hole; 17. sinking a groove; 18. a fixing plate; 19. a handle; 20. a connecting plate; 21. a gasket; 22. and connecting the grooves.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): a primary and secondary fusion column-mounted circuit breaker comprises a circuit breaker body 2 arranged on an electric pole 1, wherein three input ends 3, three output ends 4 and a mechanism box 5 for opening and closing the circuit breaker body 2 are respectively arranged on the circuit breaker body 2, a control box 6 is also arranged on the electric pole 1, the control box 6 is positioned right below the circuit breaker body 2, and a control system is arranged in the control box 6; the input end 3 and the output end 4 are respectively provided with a wireless temperature sensor 7 for monitoring the temperature of the connection part of the input end 3 and the output end 4, and the wireless temperature sensor 7 can be an intelligent wireless temperature sensor-a mother row type produced by Shandong rhododendron intelligent technology limited company; several wireless temperature sensors 7 are provided: when the temperature of the input end 3 and the output end 4 is detected to be higher than the preset value of the wireless temperature sensor 7, the sensing signal can be stably sent to the control system through the 433M wireless transmission mode.
As shown in fig. 3, a wireless temperature and humidity sensor 8 for detecting the temperature and humidity inside the mechanism box 5 is installed on the inner bottom wall of the mechanism box 5, and the wireless temperature and humidity sensor 8 can be an intelligent wireless temperature and humidity sensor AITH2411S-IH manufactured by intelligent technologies limited of shandong rhododendron; the wireless temperature and humidity sensor 8 is set to: when the temperature or the humidity in the mechanism box 5 is detected to be higher than the preset value of the wireless temperature and humidity sensor 8, the sensing signal is stably sent to the control system through the 433M wireless transmission mode.
As shown in fig. 2 and 4, the control system can receive the sensing signal sent by the wireless temperature sensor 7 and the wireless temperature and humidity sensor 8 through 433M wireless transmission mode, and send a warning signal to the backstage operation and maintenance platform to warn after receiving the sensing signal, so that the backstage operation and maintenance personnel can timely know that the input end 3, the output end 4 or the mechanism box 5 of the circuit breaker body 2 have a fault and arrange the maintenance personnel to maintain.
As shown in fig. 3, the wireless temperature and humidity sensor 8 is further connected with an external antenna 9, and sensing signals of the wireless temperature and humidity sensor 8 are sent out through the external antenna 9; the bottom of the mechanism box 5 is provided with a connecting hole 10, the wall of the connecting hole 10 is bonded with a rubber block 11 with the same size as the connecting hole 10, the rubber block 11 is provided with a wire outlet 12 matched with the outer periphery of the transmitting end of the external antenna 9, the transmitting end of the external antenna 9 penetrates through the mechanism box 5 from the part of the wire outlet 12, and the periphery of the transmitting end of the external antenna 9 is tightly abutted against the rubber block 11. Therefore, the rubber block 11 has the effect of sealing the connecting hole 10 on one hand, and on the other hand, the rubber block 11 has the function of fixing and limiting the external antenna 9, so that the transmitting end of the external antenna 9 is not easy to collide with the mechanism box 5 under the action of external force, and the possibility of damage to the external antenna 9 is reduced; meanwhile, the arrangement of the external antenna 9 enables the sensing signal of the wireless temperature and humidity sensor 8 to be transmitted to the control system without penetrating through the box wall of the mechanism box 5, so that the stability of the wireless temperature and humidity sensor 8 in transmitting the sensing signal to the control system is further enhanced.
As shown in fig. 5, a supporting plate 15 is vertically and fixedly arranged on one side wall of the mechanism box 5 along the length direction, a dehumidifying box 13 is erected on the supporting plate 15, and a dehumidifying agent 14 such as calcium chloride and activated carbon is placed in the dehumidifying box 13; the arrangement of the dehumidifying agent 14 and the dehumidifying box 13 has the function of reducing the humidity inside the mechanism box 5, and reduces the possibility of humidity abnormality inside the mechanism box 5.
As shown in fig. 5, the mechanism box 5 is further provided with a dismounting hole 16 having the same size as the dehumidifying box 13, a lower hole wall of the dismounting hole 16 is flush with the upper end surface of the support plate 15 and integrally corresponds to the dehumidifying box 13, a port of the dismounting hole 16 far away from the dehumidifying box 13 is provided with a sink 17, the side wall of the mechanism box 5 is further provided with two connecting grooves 22 opposite to the sink 17, a fixing plate 18 having the same size as the sink 17 is inserted into the sink 17, and two connecting plates 20 having the same size as the connecting grooves 22 are relatively fixedly connected to the periphery of the fixing plate 18.
As shown in fig. 5, the two connecting plates 20 are respectively inserted into the two connecting grooves 22 and are mutually bolted with the mechanism box 5, the end surface of the fixing plate 18 facing the dehumidifying box 13 is fixedly connected with the dehumidifying box 13, and the end surface of the fixing plate 18 facing away from the dehumidifying box 13 is fixedly provided with a handle 19. Therefore, when the maintenance personnel regularly overhauls the circuit breaker body 2, the connecting plate 20 can be detached from the mechanism box 5 through the bolt detaching mode, and then the fixing plate 18 and the dehumidifying box 13 are pulled out of the mechanism box 5 together in a mode of grabbing the handle 19 by hands, so that the maintenance personnel can replace the dehumidifying agent 14 in the dehumidifying box 13, and the possibility of reducing the dehumidifying effect after the dehumidifying agent 14 is used for a long time is reduced.
As shown in fig. 5, an annular gasket 21 matched with the sinking groove 17 is adhered to the end surface of the fixing plate 18 facing the dehumidifying box 13, and the gasket 21 may be made of rubber. Therefore, when the connecting plate 20 is bolted on the mechanism box 5, the sealing gasket 21 is pressed tightly by the fixing plate 18 in the sunken groove 17 to seal the connecting gap at the dismounting hole 16, thereby further enhancing the whole sealing performance of the mechanism box 5.
The implementation principle of the embodiment is as follows: wireless temperature sensor 7 and wireless temperature and humidity sensor 8 can be respectively to input 3 on the circuit breaker body 2, output 4 and mechanism case 5 monitor, and at input 3, send the sensing signal for control system when the temperature abnormal conditions appears in output 4 or the condition that humidity or humidity are unusual appears in mechanism case 5, control system can send the signal of warning and give backstage fortune dimension platform after receiving the sensing signal, thereby reached with input 3, the effect of the timely feedback of the fault conditions of output 4 or mechanism case 5, so that backstage fortune dimension personnel can in time learn this circuit breaker body 2 abnormal conditions and maintain.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a circuit breaker on secondary fusion complete set post, contains circuit breaker body (2) that sets up on pole (1), be equipped with input (3), output (4) and mechanism case (5) on circuit breaker body (2) respectively, the below of circuit breaker body (2) is equipped with control box (6), be equipped with control system, its characterized in that in control box (6): be equipped with wireless temperature sensor (7) on input (3) and output (4) respectively, wireless temperature sensor (7) are used for monitoring the temperature of input (3) and output (4) and send the sensing signal and give control system, control system is used for receiving the sensing signal of wireless temperature sensor (7) and sends warning signal to backstage fortune dimension platform.
2. The primary and secondary fused gang pole breaker of claim 1, wherein: the mechanism is characterized in that a wireless temperature and humidity sensor (8) is arranged in the mechanism box (5), the wireless temperature and humidity sensor (8) is used for monitoring the temperature and humidity in the mechanism box (5) and sending a sensing signal to the control system, and the control system is further used for receiving the sensing signal of the wireless temperature and humidity sensor (8) and sending a warning signal to the background operation and maintenance platform.
3. The primary and secondary fused gang pole breaker of claim 2, wherein: and wireless data transmission is carried out between the wireless temperature sensor (7) and the control system and between the wireless temperature and humidity sensor (8) and the control system in a 433M mode.
4. The primary and secondary fused gang pole breaker of claim 2, wherein: the wireless temperature and humidity sensor (8) is further provided with an external antenna (9), a connecting hole (10) is formed in the wall of the mechanism box (5), and the external antenna (9) partially extends out of the mechanism box (5) from the connecting hole (10).
5. The primary and secondary fused gang pole breaker of claim 4, wherein: the antenna is characterized in that a rubber block (11) used for sealing the connecting hole (10) is arranged at the connecting hole (10), and a wire outlet hole (12) matched with the outer peripheral edge of the transmitting end of the external antenna (9) is formed in the rubber block (11).
6. The primary and secondary fused gang pole breaker of claim 1, wherein: a dehumidifying box (13) is arranged in the mechanism box (5), and a dehumidifying agent (14) is arranged in the dehumidifying box (13).
7. The primary and secondary fused gang pole breaker of claim 6, wherein: be equipped with backup pad (15) on the lateral wall of mechanism case (5), dehumidification box (13) erect in backup pad (15), still seted up on the lateral wall of mechanism case (5) with dehumidification box (13) assorted disassembly hole (16), the opening part that backup pad (15) were kept away from in disassembly hole (16) has seted up heavy groove (17), it has and sinks groove (17) assorted fixed plate (18) to joint in heavy groove (17), dehumidification box (13) are connected with fixed plate (18) towards the terminal surface of disassembly hole (16), still be equipped with handle (19) on the terminal surface that fixed plate (18) deviate from dehumidification box (13).
8. The primary and secondary fused gang pole breaker of claim 7, wherein: still be equipped with two connecting plates (20) on fixed plate (18) respectively, two connecting plate (20) bolted connection respectively is on mechanism case (5), still be equipped with on the terminal surface of connecting plate (20) orientation dehumidification box (13) with heavy groove (17) assorted sealed pad (21), sealed pad (21) are supported tightly in heavy groove (17).
CN202020473082.2U 2020-04-02 2020-04-02 One-time and two-time integrated on-column circuit breaker Expired - Fee Related CN211578671U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020473082.2U CN211578671U (en) 2020-04-02 2020-04-02 One-time and two-time integrated on-column circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020473082.2U CN211578671U (en) 2020-04-02 2020-04-02 One-time and two-time integrated on-column circuit breaker

Publications (1)

Publication Number Publication Date
CN211578671U true CN211578671U (en) 2020-09-25

Family

ID=72527182

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020473082.2U Expired - Fee Related CN211578671U (en) 2020-04-02 2020-04-02 One-time and two-time integrated on-column circuit breaker

Country Status (1)

Country Link
CN (1) CN211578671U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113363108A (en) * 2021-06-02 2021-09-07 安徽华希电力科技有限公司 One-time and two-time integrated complete-set pole-mounted circuit breaker with good sealing performance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113363108A (en) * 2021-06-02 2021-09-07 安徽华希电力科技有限公司 One-time and two-time integrated complete-set pole-mounted circuit breaker with good sealing performance

Similar Documents

Publication Publication Date Title
KR20190051225A (en) Intelligent switchboard management system using integrated sensing module
CN211578671U (en) One-time and two-time integrated on-column circuit breaker
CN102866688B (en) Environment-friendly system and method for remotely monitoring industrial sewage discharge
CN102129005B (en) Transformer substation/power plant secondary circuit direct-current ground indicator and application thereof
CN110926421A (en) Early warning detection device and method for inclined damage of transformer side lightning arrester in transformer area
CN211778143U (en) Local fan monitoring device with redundancy function
CN106774026B (en) Intelligent line controller
CN206096372U (en) Unusual vibration online monitoring system of GIS equipment isolator
CN219066222U (en) Tension type fence perimeter alarm system with climbing monitoring function
CN105429102A (en) Protection warning method and system for frequency converter equipped with multiple motors
CN212135613U (en) Building fire alarm device
CN211653726U (en) ETC portal automated inspection early warning device
CN210670144U (en) Transformer arrester slope damage early warning device based on NB-IOT wireless transmission technology
CN215911899U (en) Troubleshooting device for relay protection of power system
CN220730925U (en) Fire detector and battery pack
CN117079429A (en) Generator outlet bus shell telescopic joint falling off alarm device and method
CN205680953U (en) A kind of explosion-proof energy-saving distribution box
KR20090050215A (en) Housing for ball sensor
CN220583303U (en) Bridge superstructure lateral deviation monitoring devices
CN214477166U (en) Vacuum circuit breaker capable of monitoring
CN219990340U (en) Chain breakage protection device of scraper conveyor
CN218334842U (en) Outdoor looped netowrk cabinet with ventilation dehumidification function
CN215449542U (en) Voltage transformer secondary multiple spot earth fault on-line monitoring device
CN218829980U (en) Fault alarm system for natural gas station power supply system
CN217034890U (en) Intelligent operation and maintenance management system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200925