CN104458294B - A kind of fault monitoring method of train detection equipment and system - Google Patents
A kind of fault monitoring method of train detection equipment and system Download PDFInfo
- Publication number
- CN104458294B CN104458294B CN201410790181.2A CN201410790181A CN104458294B CN 104458294 B CN104458294 B CN 104458294B CN 201410790181 A CN201410790181 A CN 201410790181A CN 104458294 B CN104458294 B CN 104458294B
- Authority
- CN
- China
- Prior art keywords
- fault
- threshold value
- total current
- brake shoe
- device operation
- 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.)
- Active
Links
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
A kind of fault monitoring method of train detection equipment and system that the application is provided, the train detection equipment are brake shoe testing equipment, and the method and system obtain the operating current of the brake shoe testing equipment first, as total current value;Then the total current value is compared with default total current threshold value;Finally judge when total current value is beyond the total current threshold value that brake shoe testing equipment breaks down, and export fault-signal.As brake shoe detecting system is certain during its operating current in normal work, therefore by the change of its electric current of monitoring, fault-signal is exported when its operating current is operating current threshold value beyond normal value, monitoring personnel can find fault in time according to fault-signal.
Description
Technical field
The application is related to train safe operation safeguards technique field, more particularly, it relates to a kind of train detection equipment
Fault monitoring method and system.
Background technology
With the development of industrial automation technology, in order to the work for reducing staff is born, how using unattended
Automatic checkout equipment is detected to train.Brake shoe testing equipment is that a kind of brake shoe to train carries out the automatic of automatic detection
Equipment, but be because as one, being arranged at open-air atmosphere, working environment is more severe, once break down will be to testing result
Impact, or even brake shoe cannot be detected, it is therefore desirable to the work shape to train detection equipments such as brake shoe testing equipments
State is monitored, to find its fault in time.
Content of the invention
In view of this, the application provides a kind of fault monitoring method of train detection equipment and system, for examining to train
The working condition of measurement equipment is monitored, to find its fault in time.
To achieve these goals, it is proposed that scheme as follows:
A kind of fault monitoring method of train detection equipment, the train detection equipment include brake shoe testing equipment, including
Following steps:
The operating current of the brake shoe testing equipment is obtained, as total current value;
The total current value is compared with default total current threshold value;
Judge that the brake shoe testing equipment breaks down when the total current value is beyond the total current threshold value, and export
Fault-signal.
Preferably, described when the total current value beyond the total current threshold value when judge the brake shoe testing equipment occur
Fault, including:
Sentence when the upper limit of the total current value higher than the total current threshold value or the lower limit less than the total current threshold value
The fixed brake shoe testing equipment breaks down.
Preferably, also include:
After judging that the brake shoe testing equipment breaks down, the work of all devices of the brake shoe testing equipment is obtained
Electric current, and as device operation current;
The device operation current is compared with default device operation current threshold value;
The device failure is judged when the device operation current is beyond the device operation current threshold value, and defeated
Go out to represent the device fault information of the device failure.
Preferably, described when the device operation current beyond the device operation current threshold value when judge that the device goes out
Existing fault, including:
When the device operation current is beyond the upper limit of the device operation current threshold value or less than the device work electricity
The device failure is judged during the lower limit of stream threshold value.
Preferably, the device includes temperature sensor, camera, motor and/or light compensating lamp;
The fault message includes temperature sensor fault information, camera fault message, electrical fault information and/or benefit
Light lamp failure information.
A kind of fault monitoring system of train detection equipment, the train detection equipment include brake shoe testing equipment, described
Brake shoe testing equipment includes:
Total current detection means, for detecting the operating current of the brake shoe testing equipment, as total current value;
Device is compared to determine, for the total current value is compared with default total current threshold value, when total electricity
Flow valuve is beyond output fault-signal during the total current threshold value.
Preferably, the device that compares to determine is for by the upper limit, the lower limit of the total current value and the total current threshold value
It is compared respectively, when lower limit of the total current value higher than the upper limit of the total current threshold value or less than the total current threshold value
When export the fault-signal.
Preferably, also include:
Device current detection means, for detecting all devices of the brake shoe testing equipment according to the fault-signal
Operating current, and as device operation current;
Device fault decision maker, for being compared the device operation current with default device operation current threshold value
Relatively, the device failure is judged when the device operation current is beyond the device operation current threshold value, and export table
Show the device fault information of the device failure.
Preferably, the device fault decision maker is used for the device operation current and the device operation current
The upper limit, lower limit are compared respectively, when the device operation current higher than the upper limit of the device operation current threshold value or is less than
The device fault information is exported during the lower limit of the device operation current threshold value.
Preferably, the device includes temperature sensor, camera, motor and/or light compensating lamp;
The fault message includes temperature sensor fault information, camera fault message, electrical fault information and/or benefit
Light lamp failure information.
From technique scheme as can be seen that a kind of fault monitoring method of train detection equipment that provides of the application and being
System, the train detection equipment include that brake shoe testing equipment, the method and system obtain the work electricity of the brake shoe testing equipment first
Stream, as total current value;Then the total current value is compared with default total current threshold value;Finally when total current value
Break down beyond judgement brake shoe testing equipment during the total current threshold value, and export fault-signal.Due to brake shoe detecting system
Certain during its operating current in normal work, therefore by the change of its electric current of monitoring, when its operating current is beyond normal
Fault-signal is exported when value is operating current threshold value, and monitoring personnel can find fault in time according to fault-signal.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for technology description is had to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of application, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
A kind of flow chart of the fault monitoring method of train detection equipment that Fig. 1 is provided for the embodiment of the present application;
Fig. 2 is a kind of flow chart of the fault monitoring method of train detection equipment that another embodiment of the application is provided;
Fig. 3 is a kind of structure chart of the fault monitoring system of train detection equipment that the another embodiment of the application is provided;
Fig. 4 is a kind of structure chart of the fault monitoring system of train detection equipment that the another embodiment of the application is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of the application protection.
Embodiment one
A kind of flow chart of the fault monitoring method of train detection equipment that Fig. 1 is provided for the embodiment of the present application, the train
Testing equipment is brake shoe testing equipment.
As shown in figure 1, the fault monitoring method that the present embodiment is provided comprises the steps:
S101:Obtain the total working electric current of brake shoe testing equipment.
The operating current during brake shoe testing equipment normal work, i.e. its total working electric current is detected, as total current
Value.
S102:Judge total current value whether beyond total current threshold value.
Total current value is compared by this step with total current threshold value.
One of preset in advance value during total current threshold value, its be according to required electricity during brake shoe testing equipment normal work
The current range value that flow valuve is determined, and flow out certain nargin according to actual conditions, this step is by previous step
The total current value of acquisition is compared with total current threshold value, if total current value is within the total current threshold value, i.e. total current value
Lower limit higher than total current threshold value, the lower limit less than total current value, then show that the brake shoe testing equipment is normal;Total current value is such as crossed
Next step is then carried out beyond the total current threshold value.
S103:Output fault message.
When total current value is beyond the total current threshold value, i.e., the total current value is higher than the upper limit of the total current threshold value or is less than
During the lower limit of the total current value, fault-signal is exported such that it is able to notify the monitoring personnel brake shoe testing equipment to break down.
From technique scheme as can be seen that the present embodiment provide a kind of train detection equipment fault monitoring method,
The train detection equipment is brake shoe testing equipment, and the method obtains the operating current of the brake shoe testing equipment first, as
Total current value;Then the total current value is compared with default total current threshold value;Finally when total current value exceeds total current
Judge during threshold value that brake shoe testing equipment breaks down, and export fault-signal.Due to brake shoe detecting system in normal work its
Certain during operating current, therefore by the change of its electric current of monitoring, when its operating current is operating current threshold beyond normal value
Fault-signal is exported during value, and monitoring personnel can find fault in time according to fault-signal.
A upper embodiment only can determine that the brake shoe testing equipment breaks down, but not can determine that be actually therein which
Individual device failure, therefore also needing to maintainer carries out the test of complexity, takes time and effort, and does not solve this problem, and spy carries
Go out following examples, to determine defective device.
Embodiment two
Fig. 2 is a kind of flow chart of the fault monitoring method of train detection equipment that another embodiment of the application is provided, should
Train detection equipment is brake shoe testing equipment.
As shown in Fig. 2 the fault monitoring method that the present embodiment is provided comprises the steps:
S201:Obtain the total working electric current of brake shoe testing equipment.
The operating current during brake shoe testing equipment normal work, i.e. its total working electric current is detected, as total current
Value.
S202:Judge total current value whether beyond total current threshold value.
One of preset in advance value during total current threshold value, its be according to required electricity during brake shoe testing equipment normal work
The current range value that flow valuve is determined, and flow out certain nargin according to actual conditions, this step is by previous step
The total current value of acquisition is compared with total current threshold value, if total current value is within the total current threshold value, i.e. total current value
Lower limit higher than total current threshold value, the lower limit less than total current value, then show that the brake shoe testing equipment is normal;Total current value is such as crossed
Next step is then carried out beyond the total current threshold value.
S203:Output fault message.
When total current value is beyond the total current threshold value, i.e., the total current value is higher than the upper limit of the total current threshold value or is less than
During the lower limit of the total current value, fault-signal is exported such that it is able to notify the monitoring personnel brake shoe testing equipment to break down.
S204:Obtain the device operation current of all devices of brake shoe testing equipment.
After judging that brake shoe testing equipment breaks down, the work of all devices of the brake shoe testing equipment is detected further
Electric current, and using the operating current as device operation current.
S205:Judge device operation current whether beyond device operation current threshold value.
Device operation current is compared with default device operation current threshold value, if the device operation current is in
Within the device operation current threshold range, i.e., less than the upper limit of device operation current threshold value or higher than device operation current threshold value
Lower limit when, the surface device is working properly.
Electric current when above-mentioned device operation current threshold value is the proper device operation, if the device work electricity for detecting
Stream illustrates that the electric current consumed by the device belongs to normal range (NR) within the scope of device operation current threshold value.
S206:Output device fault message.
When device operation current beyond default device operation current threshold value when, device operation current higher than device work
The upper limit of current threshold or less than device operation current threshold value lower limit when, show the device failure, now output represent
The device fault information of the device failure.
When maintainer is keeped in repair to the brake shoe testing equipment for breaking down, it is possible to fast according to device fault information
Speed ground is positioned to trouble point such that it is able to mitigate the difficulty of service work.
Multiple devices are provided with brake shoe testing equipment, for detecting to many kinds of parameters of brake shoe.Including temperature
Sensor, camera, motor and light compensating lamp is spent, therefore the device fault information in this step is respectively temperature sensor fault letter
Breath, camera fault message, electrical fault information and light compensating lamp fault message.
Embodiment three
Fig. 3 is a kind of structure chart of the fault monitoring system of train detection equipment that the another embodiment of the application is provided, should
Train detection equipment is brake shoe testing equipment.
As shown in figure 3, the fault monitoring system that the present embodiment is provided includes total current detection means 10 and compares to determine dress
Put 20.
Total current detection means 10 is used for detecting the total working electric current of brake shoe testing equipment.Which is arranged at brake shoe testing equipment
Power supply (not shown) on.The operating current of its power supply when detecting the brake shoe testing equipment normal work, as total current
Value.
The signal input part for comparing to determine device 20 is connected with the signal output part of total current detection means 10, for connecing
Receive the total current value and total current value is compared with default way circuit threshold value, and defeated by its signal according to comparative result
Go out end output fault-signal.
One of preset in advance value during total current threshold value, its be according to required electricity during brake shoe testing equipment normal work
The current range value that flow valuve is determined, and certain nargin is flowed out according to actual conditions, total current is examined by this device
The total current value for surveying the acquisition of device 10 is compared with total current threshold value, if total current value is within total current threshold value, i.e.,
Lower limit of the total current value higher than total current threshold value, the lower limit less than total current value, then show that the brake shoe testing equipment is normal;As mistake
Total current value is beyond the total current threshold value, the i.e. total current value higher than the upper limit of the total current threshold value or less than the total current value
Fault-signal is exported during lower limit.So as to notify the monitoring personnel brake shoe testing equipment to break down.
From technique scheme as can be seen that the present embodiment provide a kind of train detection equipment fault monitoring system,
The train detection equipment is brake shoe testing equipment, and the system includes total current acquisition device and compare to determine device that total electricity is obtained
The operating current that device obtains the brake shoe testing equipment is taken, as total current value;Then device is compared to determine by total electricity
Flow valuve is compared with default total current threshold value, judges that when total current value is beyond total current threshold value brake shoe testing equipment occurs
Fault, and export fault-signal.As brake shoe detecting system is certain during its operating current in normal work, therefore by prison
The change of its electric current being surveyed, fault-signal being exported when its operating current is operating current threshold value beyond normal value, monitoring personnel is
Fault can be found in time according to the fault-signal.
A upper embodiment only can determine that the brake shoe testing equipment breaks down, but not can determine that be actually therein which
Individual device failure, therefore also needing to maintainer carries out the test of complexity, takes time and effort, and does not solve this problem, and spy carries
Go out following examples, to determine defective device.
Facility four
Fig. 4 is a kind of structure chart of the fault monitoring system of lock train measurement equipment that the another embodiment of the application is provided, should
Train detection equipment is brake shoe testing equipment.
As shown in figure 4, the fault monitoring system that the present embodiment is provided is to be additionally arranged device on the basis of a upper embodiment
Current sensing means 30 and device fault decision maker 40.
Device current detection means 30 be when compare to determine device 20 export fault-signal when, to the brake shoe testing equipment
The operating current of each device is detected, and exports the operating current of each device by its signal output part, as
Device operation current.
The signal input part of device fault decision maker 40 is used for receiving the device operation current and by itself and default device
Part operating current threshold value is compared.
After the device operation current for obtaining corresponding device, by device operation current and default device operation current threshold value
Be compared, if corresponding device operation current beyond its corresponding device operation current threshold value, be higher than the device work
Make current threshold the upper limit or less than device operation current threshold value lower limit when the device is represented by the output of its signal output part
The device fault information for breaking down.
In general, each device all has corresponding device operation current, and these devices include temperature sensor, photograph
Mechanical, electrical machine and light compensating lamp, correspondingly just have temperature sensor operating current, cameras work electric current, motor working current and benefit
Light lamp operating current.Corresponding with each device is temperature sensor fault information, camera fault message, motor event respectively
Barrier information or light compensating lamp fault message.
When maintainer is keeped in repair to the brake shoe testing equipment for breaking down, it is possible to fast according to device fault information
Speed ground is positioned to trouble point such that it is able to mitigate the difficulty of service work.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.To the upper of the disclosed embodiments
State bright, so that professional and technical personnel in the field is realized or use the application.Multiple modifications to these embodiments are to ability
Will be apparent for the professional and technical personnel in domain, generic principles defined herein can be without departing from the application's
In the case of spirit or scope, realize in other embodiments.Therefore, the application be not intended to be limited to shown in this article these
Embodiment, and it is to fit to the most wide scope consistent with principles disclosed herein and features of novelty.
Claims (4)
1. a kind of fault monitoring method of train detection equipment, it is characterised in that the train detection equipment includes that brake shoe is detected
Equipment, comprises the steps:
The operating current of the brake shoe testing equipment is obtained, as total current value;
The total current value is compared with default total current threshold value;
Judge that the brake shoe testing equipment breaks down when the total current value is beyond the total current threshold value, and export fault
Signal;
Described when the total current value beyond the total current threshold value when judge that the brake shoe testing equipment breaks down, including:
Institute is judged when the upper limit of the total current value higher than the total current threshold value or the lower limit less than the total current threshold value
State brake shoe testing equipment to break down;
Also include:
After judging that the brake shoe testing equipment breaks down, the work electricity of all devices of the brake shoe testing equipment is obtained
Stream, and as device operation current;
The device operation current is compared with default device operation current threshold value;
The device failure is judged when the device operation current is beyond the device operation current threshold value, and export table
Show the device fault information of the device failure.
2. fault monitoring method as claimed in claim 1, it is characterised in that described when the device operation current is beyond described
The device failure is judged during device operation current threshold value, including:
When the device operation current beyond the upper limit of the device operation current threshold value or is less than the device operation current threshold
The device failure is judged during the lower limit of value.
3. fault monitoring method as claimed in claim 2, it is characterised in that the device include temperature sensor, camera,
Motor and light compensating lamp;
The fault message includes the event of temperature sensor fault information, camera fault message, electrical fault information and light compensating lamp
Barrier information.
4. a kind of fault monitoring system of train detection equipment, it is characterised in that the train detection equipment includes that brake shoe is detected
Equipment, including:
Total current detection means, for detecting the operating current of the brake shoe testing equipment, as total current value;
Device is compared to determine, for the total current value is compared with default total current threshold value, when the total current value
Beyond output fault-signal during the total current threshold value;
Described compare to determine device for by the upper limit of the total current value and the total current threshold value, lower limit respectively than
Relatively, when the upper limit of the total current value higher than the total current threshold value or the lower limit less than the total current threshold value, output is described
Fault-signal;
Also include:
Device current detection means, for detecting the work of all devices of the brake shoe testing equipment according to the fault-signal
Electric current, and as device operation current;
Device fault decision maker, for the device operation current is compared with default device operation current threshold value,
The device failure is judged when the device operation current is beyond the device operation current threshold value, and exports expression institute
State the device fault information of device failure;
The device fault decision maker is used for dividing the upper limit of the device operation current and the device operation current, lower limit
It is not compared, when the device operation current is higher than the upper limit of the device operation current threshold value or less than the device work
The device fault information is exported during the lower limit of current threshold;
The device includes temperature sensor, camera, motor and light compensating lamp;
The fault message includes the event of temperature sensor fault information, camera fault message, electrical fault information and light compensating lamp
Barrier information.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410790181.2A CN104458294B (en) | 2014-12-18 | 2014-12-18 | A kind of fault monitoring method of train detection equipment and system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410790181.2A CN104458294B (en) | 2014-12-18 | 2014-12-18 | A kind of fault monitoring method of train detection equipment and system |
Publications (2)
Publication Number | Publication Date |
---|---|
CN104458294A CN104458294A (en) | 2015-03-25 |
CN104458294B true CN104458294B (en) | 2017-03-08 |
Family
ID=52904708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201410790181.2A Active CN104458294B (en) | 2014-12-18 | 2014-12-18 | A kind of fault monitoring method of train detection equipment and system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN104458294B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110133442A (en) * | 2019-05-30 | 2019-08-16 | 中车青岛四方机车车辆股份有限公司 | A kind of rail vehicle extra-high voltage over current fault detection device and method |
CN113532805B (en) * | 2020-04-15 | 2024-07-30 | 华兴源创(成都)科技有限公司 | Fault detection method and device for display panel detection equipment |
CN114735045B (en) * | 2022-06-14 | 2022-08-19 | 成都铁安科技有限责任公司 | Fault self-diagnosis method and system for wheel set detection equipment |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002538043A (en) * | 1999-03-01 | 2002-11-12 | シーメンス アクチエンゲゼルシヤフト | Vehicle monitoring method and device |
CN102042909A (en) * | 2009-10-14 | 2011-05-04 | 中国北车集团大同电力机车有限责任公司 | Locomotive fault diagnosis method and system |
CN102520347A (en) * | 2011-12-20 | 2012-06-27 | 南车株洲电力机车有限公司 | Locomotive main circuit-breaker fault detection method and device |
CN102830302A (en) * | 2012-08-08 | 2012-12-19 | 南车株洲电力机车有限公司 | Monitoring system and method of current collector |
CN204302366U (en) * | 2014-12-18 | 2015-04-29 | 成都铁安科技有限责任公司 | A kind of fault monitoring system of brake shoe checkout equipment |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006033165A1 (en) * | 2004-09-24 | 2006-03-30 | Mitsubishi Denki Kabushiki Kaisha | Armature movement detection apparatus and armature position estimation apparatus for an elevator brake |
CN100533107C (en) * | 2007-03-30 | 2009-08-26 | 株洲南车时代电气股份有限公司 | Train running monitoring device comprehensive test method and comprehensive testbench |
-
2014
- 2014-12-18 CN CN201410790181.2A patent/CN104458294B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002538043A (en) * | 1999-03-01 | 2002-11-12 | シーメンス アクチエンゲゼルシヤフト | Vehicle monitoring method and device |
CN102042909A (en) * | 2009-10-14 | 2011-05-04 | 中国北车集团大同电力机车有限责任公司 | Locomotive fault diagnosis method and system |
CN102520347A (en) * | 2011-12-20 | 2012-06-27 | 南车株洲电力机车有限公司 | Locomotive main circuit-breaker fault detection method and device |
CN102830302A (en) * | 2012-08-08 | 2012-12-19 | 南车株洲电力机车有限公司 | Monitoring system and method of current collector |
CN204302366U (en) * | 2014-12-18 | 2015-04-29 | 成都铁安科技有限责任公司 | A kind of fault monitoring system of brake shoe checkout equipment |
Also Published As
Publication number | Publication date |
---|---|
CN104458294A (en) | 2015-03-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101699306B (en) | Method for monitoring current acquisition circuit of electric power secondary system | |
KR101670785B1 (en) | Inspection Device for Angular Velocity Sensor | |
EP3611520B1 (en) | Apparatus and method for detecting the absence of voltage | |
CN106291219A (en) | Single-phase earthing/PT disconnection fault automatic discrimination alarm device and method | |
JPWO2016092871A1 (en) | Diagnostic equipment for electric motors | |
CN104458294B (en) | A kind of fault monitoring method of train detection equipment and system | |
US10012684B2 (en) | Ground fault detection circuit | |
JP6195091B2 (en) | Distributed detection of leakage and fault currents and string fault detection | |
KR20120065830A (en) | Smart solar generation system | |
KR20170101680A (en) | Internet of Things (IoT) based on the combined arc overload blocking device for electric fire prevention | |
CN104501873B (en) | Integrated information monitoring system for ring main unit | |
CN204302366U (en) | A kind of fault monitoring system of brake shoe checkout equipment | |
KR101213163B1 (en) | Method and system for a analyzing failure of power line using protective relay | |
CN106814288A (en) | A kind of multi-functional discharging detection device of high-voltage capacitor | |
KR101663936B1 (en) | Method for Examination of Sensing Signal and Control Signal in Power Plants and Apparatus thereof | |
CN206132897U (en) | Alarm device is differentiated automatically to single -phase ground connection PT disconnection fault | |
CN104360238A (en) | Lightning stroke detection method of electric transmission line | |
CN105429102A (en) | Protection warning method and system for frequency converter equipped with multiple motors | |
JP2003172758A (en) | Lightning strike detection section orientation method by transmission line failure section detection system | |
CN104267319B (en) | Electric power control system and method | |
KR20110043512A (en) | System and method for deciding a fault type of power transmission line | |
CN204964727U (en) | Power detection equipment | |
CN202093641U (en) | Circuit break fault diagnostic instrument of fire hazard alarm detector line | |
CN206311237U (en) | A kind of temperature of oil in transformer detection means | |
CN205941610U (en) | Main transformer bushing tap adapter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |