CN109322798A - A kind of wind power generating set theft-resistant link chain automatic diagnostic device - Google Patents
A kind of wind power generating set theft-resistant link chain automatic diagnostic device Download PDFInfo
- Publication number
- CN109322798A CN109322798A CN201811290099.8A CN201811290099A CN109322798A CN 109322798 A CN109322798 A CN 109322798A CN 201811290099 A CN201811290099 A CN 201811290099A CN 109322798 A CN109322798 A CN 109322798A
- Authority
- CN
- China
- Prior art keywords
- theft
- link chain
- resistant link
- generating set
- wind power
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The present invention relates to a kind of wind power generating set theft-resistant link chain automatic diagnostic device, which includes connector modules, display module, logic card and power module, and the connector modules, display module are connect with logic card respectively；The connector modules are for accessing at least two theft-resistant link chain node signals, the display module is for showing theft-resistant link chain state, the logic card shows the corresponding theft-resistant link chain state of each theft-resistant link chain node for judging theft-resistant link chain state according to collected theft-resistant link chain node signal and controlling display module, and the power module is used for as connector modules, display module and logic card power supply.The device of the invention can test multiple theft-resistant link chain node signals simultaneously, to quickly judge that position occurs for theft-resistant link chain failure, it is significantly improved compared to traditional multimeter test method testing efficiency, diagnostic result is shown by display module in time, facilitates on-the-spot record.
Description
Technical field
The present invention relates to mechanical realization technical fields, and in particular to a kind of wind power generating set theft-resistant link chain diagnoses dress automatically
It sets.
Background technique
The theft-resistant link chain of wind power generating set is also security system, and the software and hardware protection that it is independently of computer system is arranged
It applies.It is designed using antilogical, it would be possible to a circuit is connected into the malfunctioning node that Wind turbine causes serious harm: promptly being stopped
Machine button (tower bottom main control cabinet), two generators overrun module, turn round cable switch, the signal from pitch-controlled system theft-resistant link chain, tightly
Anxious stop botton (engine room control cabinet), vibroswitch, PLC are overrun signal, the safety chain signal to pitch-controlled system, bus OK signal
Deng.Once one of node action will cause whole circuit to power off, unit enters emergency shutdown process, and makes master control system
Blocking is in converter system.
Theft-resistant link chain is also last pipe protection of entire unit, it is in after the software protection of unit.Security system by
The Logic control module and hardware switch node composition, its implementation for meeting international standard keep unit more safe and reliable.If
Theft-resistant link chain malfunctioning node cannot restore, and the normal operation operation of entire unit all can not achieve.Existing safety chain system
When failure, it is necessary to the reason of starting device could be resetted again after carrying out on-the-spot test confirmation, and lead to theft-resistant link chain failure
Have very much, and traditional test mode is repeatedly tested using multimeter, inefficiency, the operating time is long, influences unit
Generating efficiency.Such as pitch-controlled system theft-resistant link chain in wind power generating set, pitch-controlled system theft-resistant link chain is all made of 24V power supply, due in wind
In power generator group, cabin uses cable connection to wheel hub distance close to 10 meters between the two, and connection meet is variable-pitch sliding ring
Rotor and stator.When theft-resistant link chain breaks down, it usually needs the safety chain signal of test variable-pitch sliding ring interface is to judge
Failure is in cabin side or hub side.Obviously, above-mentioned test is carried out using traditional test method, testing efficiency is low, behaviour
It is long to make the time.
Therefore, it is badly in need of a kind of theft-resistant link chain automatic fault diagnosis device of wind power generating set, to improve detection efficiency, reduces
Operating time, and then improve the generating efficiency of unit.
Summary of the invention
The present invention provides a kind of wind power generating set theft-resistant link chain automatic diagnostic devices, are surveyed with solving traditional test method
The problem of examination inefficiency, the operating time is long, influences the generating efficiency of unit.
In order to solve the above technical problems, wind power generating set theft-resistant link chain automatic diagnostic device of the invention includes connector mould
Block, display module, logic card and power module, the connector modules, display module are connect with logic card respectively；
For at least two theft-resistant link chain node signals of access, the display module is used to show theft-resistant link chain state the connector modules,
The logic card according to collected theft-resistant link chain node signal for judging theft-resistant link chain state and controlling display module to show
The corresponding theft-resistant link chain state of each theft-resistant link chain node, the power module are used for as connector modules, display module and logic electricity
The power supply of road plate.
Wind power generating set theft-resistant link chain automatic diagnostic device of the invention can test multiple theft-resistant link chain node signals simultaneously,
To quickly judge that position occurs for theft-resistant link chain failure, significantly improved compared to traditional multimeter test method testing efficiency,
Diagnostic result is shown in time by display module, facilitates on-the-spot record.
In order to realize logic card to the accurate judgement of theft-resistant link chain state, logic card includes sequentially connected front end
Sample circuit, analog/digital conversion module and control chip.
In order to realize the fast insert-pull of connection cables between theft-resistant link chain node and automatic diagnostic device link block, connector
Module uses registered jack socket.
The problem of in order to be suitable for different types of theft-resistant link chain nodal point connecting and the interconnection of connector modules interfix, connector
Module includes male and female connector socket.
For carrying, property easy to use, safe and anti-tampering consideration, the device of the invention is provided with outer housing, described
Display module is arranged on the upper surface of outer housing, and the male and female connector socket is separately positioned on two sides of outer housing.
For ease of operation, which further includes a handle, and the handle setting is in public connector socket or female connection
On that opposite side of face where device socket.
For the ease of installation and removal, screw thread is provided on the handle, handle is screwed in by the threaded hole on outer housing
Outer housing, and pass through the locking nut fixed handle on the inside of outer housing.
In order to save occupied space, the handle inner is provided with card slot, and power module is mounted in the card slot.
For the ease of reading theft-resistant link chain state, the display module is digital display screen, the number of the digital display screen
Towards handle orientations.
In order to fast implement theft-resistant link chain Obstacle detection, the collected theft-resistant link chain node signal is voltage signal, described
Logic card is used to judge according to the size of voltage signal that theft-resistant link chain to be disconnection or connection.
Detailed description of the invention
Fig. 1 is the schematic diagram of wind power generating set theft-resistant link chain automatic diagnostic device；
Fig. 2 is the perspective view of wind power generating set theft-resistant link chain automatic diagnostic device；
Fig. 3 is the top view of wind power generating set theft-resistant link chain automatic diagnostic device；
Fig. 4 is the front view of wind power generating set theft-resistant link chain automatic diagnostic device；
Fig. 5 is the right view of wind power generating set theft-resistant link chain automatic diagnostic device；
In figure, 1 is male connector heavy-duty connector, and 2 be upper cover plate, and 3 be digital display screen, and 4 be logic card, and 5 be locking
Nut, 6 be handle, and 7 be power module, and 8 be outer housing, and 9 be female heavy-duty connector.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, wind power generating set theft-resistant link chain automatic diagnostic device includes connector modules, display module, logic
Circuit board and power module, connector modules, display module are connect with logic card respectively；The connector modules are for connecing
Entering at least two theft-resistant link chain node signals, the display module is used to show the corresponding theft-resistant link chain state of each theft-resistant link chain node,
The logic card according to collected theft-resistant link chain node signal for judging theft-resistant link chain state and controlling display module to show
The corresponding theft-resistant link chain state of each theft-resistant link chain node, power module are used to be connector modules, display module and logic card
Power supply.
Logic card include control chip, with control the analog/digital conversion module that connect of chip and with analog/digital conversion module
The front-end sampling circuit of connection.Front-end sampling circuit samples theft-resistant link chain node signal by connector modules.Wherein control chip
For MCU.
In order to realize that diagnostic device is connect quick pluggable with theft-resistant link chain node, connector modules use modular company
Connect device plug.The present invention can also configure male and female connector socket, to adapt to different classes of connector interfix interconnection.
Carrying, property easy to use, safe and anti-tampering consideration, diagnostic device are provided with outer housing, wherein shell
Upper cover plate is provided on the upper surface of body, display module is set at upper cover plate.And the side of outer housing is arranged in connector modules
On face, for including at least the diagnostic device of two connector sockets, two connector sockets are separately positioned on outer housing difference
Side on.Logic card is arranged in outer enclosure interior.
In order to easy to operate, handle is provided on the outer housing side opposite with connector modules.For the ease of installation
And disassembly, screw thread can be set on handle, and the spiral shell matched with handle can be set on the side of outer housing accordingly
Pit screws handle on upper outer shell that side with threaded hole, is then spun on locking nut on the inside of outer housing
On handle, to realize the assembly of handle and outer housing.It is stronger in order to install outer housing and handle, on locking nut
It is screwed on handle again after screw thread glue can be smeared.Certainly, handle can also be mounted on outer housing using other modes, such as
Directly the side of handle and outer housing is integrally formed.
In order to save space, card slot can be set in handle inner, power module is mounted in card slot.
Display module uses digital display screen, digital display screen is mounted on upper cover plate, the number on digital display screen
Towards the direction of handle, in order to read.The present embodiment preferably uses shaft coupling digital display screen.
Below by above-mentioned automatic diagnostic device for being explained for testing the safety chain signal of variable-pitch sliding ring interface in detail
State the assembling process of wind generating set pitch control slip ring theft-resistant link chain automatic diagnostic device:
In the Wind turbines using electric variable pitch, variable-pitch sliding ring is a very crucial equipment, it is wheel hub variable pitch
System provides the connection of the electric energy such as electrical source of power, communication, electrical control coherent signal, emergency lighting power supply.So theft-resistant link chain
When failure, the position of test failure generation is needed.As shown in Figure 2-5, a kind of wind generating set pitch control slip ring safety is provided
Chain automatic diagnostic device.
Variable-pitch sliding ring theft-resistant link chain automatic diagnostic device includes two connector sockets, respectively 1 He of male connector heavy-duty connector
Female heavy-duty connector 9.The outer housing 8 of the diagnostic device is that there are six the square casing in face, male connector heavy-duty connectors 1 for a tool
It is separately positioned on two adjacent sides of outer housing 8 with female heavy-duty connector 9, with 1 place side of male connector heavy-duty connector
Relative to side on be provided with handle 6.The upper surface of outer housing 8 is upper cover plate 2, and digital display screen 3 is arranged in upper cover plate 2
On, and shown on digital display screen 3 digital towards handle 6.Power module 7 is two section 24V lithium batteries, is arranged in handle 6
In the card slot in portion.Logic card 4 is arranged inside outer housing 8, divides and connects with power module 7, digital display screen 3, male connector heavy duty
It connects device 1 and female heavy-duty connector 9 connects, and the connecting line between logic card 4 and above-mentioned modules is also respectively positioned on outside
Inside shell 8.
Handle 6, power module 7, logic card 4, digital display screen 3, male connector heavy-duty connector 1 are connected with female heavy duty
The specific assembling process of device 9 are as follows:
First two section 24V lithium batteries are fitted into 6 inner card cage of handle, then handle 6 is screwed into threaded hole that of upper outer shell 8
On one side until completely attaching to, finally the smearing screw thread glue of locking nut 5 is spun on handle 6 on the inside of outer housing 8.
After electronic component corresponding on logic card 4 is installed test normally, respectively by 24V lithium battery, digital-scroll technique
Respective lines access logic card 4 on screen 3；Again respectively by logic card 4 with male and female head heavy-duty connector (1,9) phase
The conducting wire for answering position to connect is drawn；Finally logic card 4 is mounted in the corresponding mounting base in outer housing 8.
Digital display screen 3 is mounted on upper cover plate 2, upper cover plate 2 is mounted in the upper surface (digital display screen 3 of outer housing 8
Number is towards 6 direction of handle), alignment hole location stamps 8 crossed countersunk head screws, and upper cover plate 2 and outer housing 8 are fixedly mounted.
Assembling 1 module of male connector heavy-duty connector: the male end conducting wire that logic card 4 is accordingly drawn is crimped on respectively each
On the respective pins position of module, ties and male connector heavy-duty connector 1 is pressed in outer housing 8 and 6 place side phase of handle after harness
Pair the side on, be aligned urgent 4 Cross Recess Head Screws of hole location, realize male connector heavy-duty connector 1 and outer housing 8 dress
Match.
Assembling 9 module of female heavy-duty connector: the female end conducting wire that logic card 4 is accordingly drawn is crimped on respectively each
On the respective pins position of module, ties and female heavy-duty connector 9 is pressed in outer housing 8 and 6 place side phase of handle after harness
In the adjacent side, urgent 4 Cross Recess Head Screws of hole location are directed at, realize the dress of female heavy-duty connector 9 and outer housing 8
Match.
Blower variable-pitch slip ring theft-resistant link chain is direct current 24V series circuit, and the voltage mainly tested on each connector pin is
No is 24V DC, and specific test process is as follows:
Front-end sampling circuit successively scans each contact pin of heavy-duty connector in logic card 4, sweeps each time
When retouching, by the voltage on the mutual inductor sample contact pin, according to the logic of theft-resistant link chain, when theft-resistant link chain is connected, voltage should be 24V
± 1V should be 0V ± 0.5V when theft-resistant link chain disconnects.
The analog quantity of front-end sampling circuit sampling is sent into control chip MCU after analog/digital conversion and is calculated each time
Processing when the voltage value after calculating is 24V ± 1V, then judges that the theft-resistant link chain in the channel is connection, and record Current Scan
Stitch number.Voltage value after calculating is 0V ± 0.5V, then judges that the theft-resistant link chain in the channel is to disconnect, and record and currently sweep
The stitch number retouched.Although sampled value should be 0V when theft-resistant link chain disconnects, it is certain electrical due to that can be brought into sampling process
Noise, therefore the thresholding judged is 0V ± 0.5V.
The 24V or 0V that MCU will calculate storage, which correspond to stitch result and be sent to digital display screen 3, to be shown.Power supply mould
Block 7 provides required power supply for each perform function module.
Claims (10)
1. a kind of wind power generating set theft-resistant link chain automatic diagnostic device, which is characterized in that the device includes connector modules, display
Module, logic card and power module, the connector modules, display module are connect with logic card respectively；The company
Connect device module for access at least two theft-resistant link chain node signals, the display module be used for show theft-resistant link chain state, it is described to patrol
It collects circuit board and shows each peace for judging theft-resistant link chain state according to collected theft-resistant link chain node signal and controlling display module
The corresponding theft-resistant link chain state of chain node entirely, the power module are used to supply for connector modules, display module and logic card
Electricity.
2. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 1, which is characterized in that the logic electricity
Road plate includes sequentially connected front-end sampling circuit, analog/digital conversion module and control chip.
3. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 1, which is characterized in that the connector
Module uses modular connector socket.
4. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 2, which is characterized in that the connector
Module includes male and female connector socket.
5. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 4, which is characterized in that device setting
There is outer housing, the display module is arranged on the upper surface of outer housing, and the male and female connector socket is separately positioned on shell
Two sides of body.
6. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 5, which is characterized in that the device also wraps
A handle is included, on that opposite side of face where public connector socket or female connectors socket is arranged in the handle.
7. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 6, which is characterized in that on the handle
It is provided with screw thread, handle screws in outer housing by the threaded hole on outer housing, and fixes by the locking nut on the inside of outer housing
Handle.
8. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 6, which is characterized in that in the handle
Portion is provided with card slot, and power module is mounted in the card slot.
9. according to wind power generating set theft-resistant link chain automatic diagnostic device described in claim 6-8 any one, which is characterized in that
The display module is digital display screen, and the number of the digital display screen is towards handle orientations.
10. wind power generating set theft-resistant link chain automatic diagnostic device according to claim 1, which is characterized in that the acquisition
The theft-resistant link chain node signal arrived is voltage signal, and the logic card is used to judge that theft-resistant link chain is according to the size of voltage signal
It is disconnecting or connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290099.8A CN109322798A (en) | 2018-10-31 | 2018-10-31 | A kind of wind power generating set theft-resistant link chain automatic diagnostic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290099.8A CN109322798A (en) | 2018-10-31 | 2018-10-31 | A kind of wind power generating set theft-resistant link chain automatic diagnostic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109322798A true CN109322798A (en) | 2019-02-12 |
Family
ID=65260575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811290099.8A Pending CN109322798A (en) | 2018-10-31 | 2018-10-31 | A kind of wind power generating set theft-resistant link chain automatic diagnostic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109322798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456269A (en) * | 2019-07-01 | 2019-11-15 | 许昌许继风电科技有限公司 | A kind of wind power pitch-controlled system failure wave-recording method and oscillograph |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050174607A1 (en) * | 2004-02-05 | 2005-08-11 | Hille David G. | Diagnostic tool with fax transmission capability |
| CN201794726U (en) * | 2010-09-10 | 2011-04-13 | 杨志一 | Lightning stroke recorder for wind generating set |
| CN102434387A (en) * | 2011-11-16 | 2012-05-02 | 三一电气有限责任公司 | Draught fan detection and diagnosis system |
| CN102748215A (en) * | 2012-07-12 | 2012-10-24 | 国电南京自动化股份有限公司 | Safety chain system of wind generating set and fault rapid identification method thereof |
| CN102803715A (en) * | 2010-02-12 | 2012-11-28 | 三菱重工业株式会社 | Wind power generation device handy terminal, wind power generation device, and wind power generation site |
| CN204188201U (en) * | 2014-11-03 | 2015-03-04 | 西南科技大学 | A kind of portable gentle breeze-driven generator running status remote monitoring instrument |
| CN205333818U (en) * | 2015-12-04 | 2016-06-22 | 哈尔滨理工大学 | Wind generating set does not have sensor failure diagnostic system based on DSP |
| CN205451439U (en) * | 2015-12-28 | 2016-08-10 | 国家电网公司 | Hand -held type platform district debugging terminal |
| CN205453734U (en) * | 2016-03-07 | 2016-08-10 | 南京新和普电力科技有限公司 | Hand -held type digit trouble network record all -in -one |
| CN205592075U (en) * | 2016-05-06 | 2016-09-21 | 莆田学院 | Aerogenerator monitoring system based on wireless communication |
| CN205826827U (en) * | 2016-07-20 | 2016-12-21 | 中能电力科技开发有限公司 | Wind turbines fault display device |
| CN207516553U (en) * | 2017-11-13 | 2018-06-19 | 中能电力科技开发有限公司 | Inspection prior-warning device in wind power plant field |
| CN108519241A (en) * | 2018-05-27 | 2018-09-11 | 山东梅拉德能源动力科技有限公司 | A kind of electric vehicle holds detection device and its fault detection method |
| CN209244736U (en) * | 2018-10-31 | 2019-08-13 | 许昌许继风电科技有限公司 | Wind power generating set theft-resistant link chain automatic diagnostic device |
-
2018
- 2018-10-31 CN CN201811290099.8A patent/CN109322798A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050174607A1 (en) * | 2004-02-05 | 2005-08-11 | Hille David G. | Diagnostic tool with fax transmission capability |
| CN102803715A (en) * | 2010-02-12 | 2012-11-28 | 三菱重工业株式会社 | Wind power generation device handy terminal, wind power generation device, and wind power generation site |
| CN201794726U (en) * | 2010-09-10 | 2011-04-13 | 杨志一 | Lightning stroke recorder for wind generating set |
| CN102434387A (en) * | 2011-11-16 | 2012-05-02 | 三一电气有限责任公司 | Draught fan detection and diagnosis system |
| CN102748215A (en) * | 2012-07-12 | 2012-10-24 | 国电南京自动化股份有限公司 | Safety chain system of wind generating set and fault rapid identification method thereof |
| CN204188201U (en) * | 2014-11-03 | 2015-03-04 | 西南科技大学 | A kind of portable gentle breeze-driven generator running status remote monitoring instrument |
| CN205333818U (en) * | 2015-12-04 | 2016-06-22 | 哈尔滨理工大学 | Wind generating set does not have sensor failure diagnostic system based on DSP |
| CN205451439U (en) * | 2015-12-28 | 2016-08-10 | 国家电网公司 | Hand -held type platform district debugging terminal |
| CN205453734U (en) * | 2016-03-07 | 2016-08-10 | 南京新和普电力科技有限公司 | Hand -held type digit trouble network record all -in -one |
| CN205592075U (en) * | 2016-05-06 | 2016-09-21 | 莆田学院 | Aerogenerator monitoring system based on wireless communication |
| CN205826827U (en) * | 2016-07-20 | 2016-12-21 | 中能电力科技开发有限公司 | Wind turbines fault display device |
| CN207516553U (en) * | 2017-11-13 | 2018-06-19 | 中能电力科技开发有限公司 | Inspection prior-warning device in wind power plant field |
| CN108519241A (en) * | 2018-05-27 | 2018-09-11 | 山东梅拉德能源动力科技有限公司 | A kind of electric vehicle holds detection device and its fault detection method |
| CN209244736U (en) * | 2018-10-31 | 2019-08-13 | 许昌许继风电科技有限公司 | Wind power generating set theft-resistant link chain automatic diagnostic device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456269A (en) * | 2019-07-01 | 2019-11-15 | 许昌许继风电科技有限公司 | A kind of wind power pitch-controlled system failure wave-recording method and oscillograph |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106841735B (en) | Electric power collector and energy consumption monitoring method thereof | |
| CN206638742U (en) | Portable electronic equipment auto testing instrument | |
| CN203798898U (en) | High-voltage electriferous display locking device | |
| CN209244736U (en) | Wind power generating set theft-resistant link chain automatic diagnostic device | |
| CN201293801Y (en) | Customspass cabinet for metering electric energy | |
| CN109322798A (en) | A kind of wind power generating set theft-resistant link chain automatic diagnostic device | |
| CN106768018B (en) | Site installs the on-line monitoring and diagnostic system and method for second power equipment | |
| CN102570213B (en) | Detection combination plugboard with uninterruptible power supply, hot-pluggable detection plugboard and power supply plugboard | |
| CN110244176A (en) | A kind of high-tension connector fault detection system and high-voltage power system | |
| CN215867023U (en) | Transformer non-electric quantity signal loop insulation resistance detection device | |
| CN205333125U (en) | Measurement test machine people | |
| CN204649937U (en) | A kind of electric battery detection system and testing circuit, collector | |
| CN2350771Y (en) | Inserted electric energy meter | |
| CN101345470B (en) | Current transformer | |
| CN219497695U (en) | Measuring switch convenient to disassemble and assemble | |
| CN218717270U (en) | Become oar bearing monitoring devices | |
| CN204496277U (en) | A kind of electric battery detection system | |
| CN220040696U (en) | On-line monitoring device for locomotive accumulator | |
| CN219418664U (en) | Current transformer assembly for measuring switch and measuring switch | |
| CN215005682U (en) | Portable 10kV power cable phase rapid checking alarm device | |
| CN214899254U (en) | A changeover mechanism and changeover subassembly for solar module detects | |
| CN221078811U (en) | Slip ring testing machine for wind driven generator | |
| CN216310244U (en) | Open-circuit fault diagnosis device for power tube of direct-current charging pile rectifier | |
| CN212905195U (en) | Portable direct current fault detector | |
| CN210607901U (en) | Signal acquisition unit box convenient for sensor connection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |