CN101782438A - Wireless temperature monitoring system device of overheating of electrical device - Google Patents
Wireless temperature monitoring system device of overheating of electrical device Download PDFInfo
- Publication number
- CN101782438A CN101782438A CN200910010177A CN200910010177A CN101782438A CN 101782438 A CN101782438 A CN 101782438A CN 200910010177 A CN200910010177 A CN 200910010177A CN 200910010177 A CN200910010177 A CN 200910010177A CN 101782438 A CN101782438 A CN 101782438A
- Authority
- CN
- China
- Prior art keywords
- wireless
- temperature
- chip microcomputer
- data transmission
- pin
- 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
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a wireless temperature monitoring system device of overheating of an electrical device, which is characterized in that a micro-wireless temperature collector is mounted in the vicinity of a device point which needs to measure the temperature, temperature and humidity values of the measured point are collected through a digital temperature/humidity sensing element, and data transmission is carried out between the wireless temperature monitoring system device and a wireless receiver outside safety distance through a 2.4GHz wireless data transmission module. The wireless temperature monitoring system device can effectively avoid potential safety hazard caused by the traditional methods like contact type, optical temperature measurement, humidity measurement and the like. The wireless receiver can detect the device environmental temperature and the device environmental humidity in a real-time manner, and combine with a relay protection device and an automatic dehumidifying device for completing automatic power-off and automatic dehumidification protection under the situations that the temperature and the temperature increase of the measured point exceed the limits and the device is in over-temperature and over-humidity. The wireless temperature collector uses the ultra-low power consumption design and adopts a lithium hydroxide battery with high temperature resistance, long service life and high capacity for providing a power supply, so that the wireless temperature collector can work for at least 10 years without the need of maintenance.
Description
Technical field
The invention belongs to a kind of wireless temperature data transmission that under high-tension apparatus charging operation situation, realizes, real-time online facility environment humidity and facility environment temperature detection, temperature rise early warning and overtemperature alarm, particularly a kind of wireless temperature monitoring system device of overheating of electrical device.
Technical background
Along with the different renewal of equipment day of high pressure power transmission and distribution industry, various types of switch cubicles have replaced older generation's equipment for power transmission and distribution, because the rubescent heating problem in contact is difficult to discovery and measures, have caused the generation of a lot of major accidents of power transmission and distribution industry.At present, all there is potential safety hazard in method of testings such as common optical fiber on-line measurement, far infrared temperature measurement on-line, far infrared imagery tester to high-tension switch cabinet to some extent to contact and contact, the cable end of the international and domestic mid-high-tension switch cabinet of producing in recent years, all belong to the category that does not have monitoring.The inventor is in " hot fault warning system device " utility model patent of application on November 10th, 2006, the patent No.: ZL200620094006.0; And " hot fault warning system device " application number of application on February 1st, 2008: 200810010362.3.Be to have realized high voltage alive equipment real-time online temperature monitoring in service and early warning by the wireless data communication mode, than method of testings such as general optical fiber temperature measurement on-line, far infrared temperature measurement on-line, far infrared imagery testers, all belong to the category that does not have monitoring with the contacts for vacuum-break switches of present middle high-tension switch cabinet both domestic and external and contact, cable end, all there is in various degree potential safety hazard in high-tension switch cabinet.
Summary of the invention
The present invention has overcome the defective of above-mentioned existence; the deficiency that other thermometric mode of reaching exists; provide that a kind of temperature survey is contactless, information transmission does not have lead and can be connected with industrial field bus again; support daemon software to monitor, provide intuitively in real time temperature data; and carry out facility environment humidity and temperature detection; in conjunction with super wet warning and automatically measures such as dehumidification equipment, overtemperature alarm and protective relaying device power-off protection, and then form the wireless temperature monitoring system device of overheating of electrical device of safe and reliable automated information management platform.
Wireless temperature monitoring system device of overheating of electrical device content Description of the present invention:
Wireless temperature monitoring system device of overheating of electrical device of the present invention, it is characterized in that: form by wireless humiture data receiver and wireless digital Temperature sampler two parts, adopt the wireless data communication mode to carry out data transmission between wireless digital Temperature sampler and the wireless humiture data receiver, adopting the micro radio Temperature sampler to be installed in treats near the thermometric equipment point, gather the humiture numerical value of measured point by digital temperature-sensitive/wet element, and and between the outer wireless receiver of safe distance the wireless data transmission module by 2.4GHz carry out data transmission; The wireless humiture data receiver, by: one chip microcomputer IC1, storer and house dog IC2, differential bus driver IC 3, wireless data transmission module IC4, low pressure difference linearity pressure regulator IC5, Temperature Humidity Sensor IC6, LCDs LCD, super wet warning output relay JD1 and overtemperature alarm output relay JD2 form, wherein: with single-sheet miniature control computer IC1 is core, is connected to storer and house dog IC2 respectively, differential bus driver IC 3, wireless data transmission module IC4, low pressure difference linearity pressure regulator IC5, Temperature Humidity Sensor IC6, LCDs LCD, super wet warning output relay JD1 and overtemperature alarm output relay JD2.
The wireless digital Temperature sampler, by: one chip microcomputer IC1, wireless data transmission module IC2, digital temperature sensor IC3, field effect transistor Q1, high temperature resistance and long life-span lithium hydroxide battery are formed, wherein: with one chip microcomputer IC1 is core, is connected to wireless data transmission module IC2, digital temperature sensor IC3, field effect transistor Q1 respectively.
Wireless temperature monitoring system device of overheating of electrical device of the present invention; by the real-time detector switch cabinet of wireless humiture data receiver internal temperature, humidity situation, when overtemperature, super wet situation take place, finish automatic outage and dehumidify automatically and protect in conjunction with protective relaying device.Facility environment humidity and facility environment temperature data that measured point temperature that the wireless humiture data receiver returns by the wireless digital Temperature sampler and wireless humiture data receiver self collect; to liquid crystal display, and provide real-time, automatic, safe high-tension power transmission and transformation equipment hot stall early warning scheme with measured point temperature, temperature rise, facilities air temperature, facilities air humidity display in conjunction with outside relay protection, dehumidification equipment and background monitoring computing machine.Adopt high temperature resistant long-life lithium hydroxide battery as power supply, battery is remained on more than 10 years service time in conjunction with whole super low-power consumption design.The wireless digital Temperature sampler is whole to adopt the microminiature design, and volume is little, in light weight, is convenient to install and use under the narrow and small environment in space.Simultaneously also help guaranteeing to measure the accuracy of temperature near the testee surface.
Description of drawings
Fig. 1 is wireless humiture data receiver circuit theory diagrams
Fig. 2 is wireless digital Temperature sampler circuit theory diagrams
Embodiment
Wireless temperature monitoring system device of overheating of electrical device of the present invention is to realize like this, the main body of wireless temperature monitoring system device of overheating of electrical device is divided into wireless humiture data receiver and wireless digital Temperature sampler two parts, between them, adopt the 2.4GHz digital transmission module to carry out wireless data communication, to be sent to the wireless humiture data receiver by the temperature data that the wireless digital Temperature sampler measures, and by its show accordingly, upload, operation such as warning.Usually in each transformer station several high-tension switch cabinets are set all, each switch cubicle inside has a plurality of monitoring points again.The present invention generally is provided with a wireless receiver and several wireless digital Temperature samplers supporting with it with each switch cubicle as base unit.Be installed between wireless digital Temperature sampler on the inner measured point of switch cubicle and the wireless humiture data receiver and carry out data transmission by wireless mode, the wireless temperature collector adopts the microminiature design, be applicable to various complex installation test environments, help the wireless digital Temperature sampler is installed in more position near testee.The wireless digital Temperature sampler is emitted to wireless humiture data receiver inside with its measured point temperature data that collects by the 2.4GHz wireless communication module; and finish real time temperature demonstration, overtemperature alarm and super wet warning by the wireless humiture data receiver; in conjunction with super wet warning and measures such as dehumidification equipment, overtemperature alarm and protective relaying device power-off protection automatically, form complete, effective equipment protection mechanism.The wireless humiture data receiver is sent to the background monitoring computing machine by the standard industry fieldbus with information again, the background monitoring computing machine carries out directly perceived, dynamic, real-time demonstration with the temperature data of all measured points, and convenient on-the-spot duty personnel carries out trouble-saving.
Communication between wireless digital Temperature sampler and the wireless humiture data receiver is strict.Each wireless digital Temperature sampler all is provided with a unique address number, and it is staggered that wireless digital Temperature sampler use cpu clock separately carries out the communication sequential, all adopted the frequency hopping mode between each wireless humiture data receiver.Use three kinds of above-mentioned communication modes effectively to guarantee the correct and reliability of data transmission, problem side by side except disturbing each other.
Do below in conjunction with accompanying drawing and to specify, see Fig. 1, the wireless humiture data receiver in the wireless temperature monitoring system device of overheating of electrical device mainly by: one chip microcomputer IC1, storer and house dog IC2, differential bus driver IC 3, wireless data transmission module IC4, low pressure difference linearity pressure regulator IC5, Temperature Humidity Sensor IC6, LCDs LCD, super wet warning output relay JD1 and overtemperature alarm output relay JD2 form.Wherein: with single-sheet miniature control computer IC1 is core, is connected to storer and house dog IC2, differential bus driver IC 3, wireless data transmission module IC4, low pressure difference linearity pressure regulator IC5, Temperature Humidity Sensor IC6, LCDs LCD, super wet warning output relay JD1 and overtemperature alarm output relay JD2 respectively.
One chip microcomputer IC1 is the core controller of wireless humiture data receiver.The P0.2 of one chip microcomputer IC1, P0.3, P0.4, P0.5, P0.6, P0.7 pin are connected to wireless data transmission module IC4, wireless data transmission module is in accepting state when operation, at any time receive the temperature data of uploading by each wireless digital Temperature sampler, and the data that receive are transferred to one chip microcomputer IC1 handle.The P2.0 of one chip microcomputer IC1, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6, P2.7, P0.0, P0.1, P4.0, P4.1, P4.3 pin are connected to LCDs LCD, LCDs LCD shows the temperature data of each measured point that one chip microcomputer IC1 inside is received by wireless data transmission module IC4, for site examining and repairing, maintainer provide intuitively, information display mode easily.The P1.2 of one chip microcomputer IC1, PI.3 pin are connected to Temperature Humidity Sensor IC6; by Temperature Humidity Sensor ambient humidity in environment temperature in the cabinet and the cabinet is returned to one chip microcomputer IC1; when ambient humidity exceeds safe range in the cabinet, can start dehumidification equipment in the cabinet by the super wet warning output terminal of receiver, the security of operation of protection high-tension power transmission and transformation equipment.Environment temperature compares with the temperature data that the wireless digital Temperature sampler measures in the detected cabinet; when exceeding safe temperature rise value, start the overtemperature alarm output of wireless humiture data receiver; and start protective relaying device and carry out power-off protection, and prompting on-site supervision, maintainer in time take safety measures.The P1.4 of one chip microcomputer IC1, P1.5, P1.6, P1.7 pin are connected with front mounted buttons, and the set-up function of alarm temperature, warning humidity and warning temperature rise temperature is provided, for the warning that adapts to distinct device requires to facilitate.The P3.3 of one chip microcomputer IC1, P3.4, P3.5, P3.7 pin are connected with storer and house dog IC2, the temperature alarming, humidity warning and the temperature rise temperature alarming value that operation of receiver frequency, address information and user are provided with by storer store, and the set information of memory inside can be read among the one chip microcomputer IC1 when the wireless humiture data receiver powers on operation.House dog can carry out the forced resetting operation when the wireless receiver misoperation stops, guaranteed wireless temperature monitoring system device of overheating of electrical device reliability in use to greatest extent.The P3.0 of one chip microcomputer IC1, P3.1, P3.2 pin are connected with differential bus driver IC 3, all real time temperature data of one chip microcomputer inside can transfer to the background monitoring computing machine by the standard industry local communication bus transmission model that differential bus driver IC 3 provides, and by the background monitoring computing machine with the temperature data on all communication buses directly perceived, dynamic, real-time be shown to on-site supervision or maintainer.The P1.0 of one chip microcomputer IC1, P1.1 pin are connected with super wet warning output relay JD1, overtemperature alarm output relay JD2 respectively; detecting at the wireless humiture data receiver provides the output of reporting to the police when temperature or humidity exceed alarm threshold; and start the outside relay protection device be attached thereto and automatically dehumidification equipment equipment is carried out complete, effective security protection, be country and enterprise minimizing life and economic loss to greatest extent.
See Fig. 2, the wireless digital Temperature sampler in the wireless temperature monitoring system device of overheating of electrical device mainly by: one chip microcomputer IC1, wireless data transmission module IC2, digital temperature sensor IC3, field effect transistor Q1, high temperature resistance and long life-span lithium hydroxide battery are formed.Wherein: with one chip microcomputer IC1 is core, be connected to wireless data transmission module IC2, digital temperature sensor IC3, field effect transistor Q1 respectively, and use high temperature resistance and long life-span lithium hydroxide battery as power supply, in conjunction with whole super low-power consumption design battery is remained on more than 10 years service time.The wireless digital Temperature sampler is whole to adopt the microminiature design, and volume is little, in light weight, is convenient to install and use under the narrow and small environment in space.Simultaneously also help guaranteeing to measure the accuracy of temperature near the testee surface.
One chip microcomputer IC1 is the core controller of wireless digital Temperature sampler.One chip microcomputer adopts the MSP430F2013 super low-power consumption of Texas Instruments's release, 16 mixed-signal processor, is particularly suitable for making battery-powered wireless digital Temperature sampler.The P1.2 of one chip microcomputer IC1, P1.3, P1.4, P1.5 pin are connected with wireless data transmission module IC2, wireless data transmission module adopts the nRF24L01+ chip, 2.4GHz wireless transmission method, one chip microcomputer IC1 temperature inside data are sent in the wireless humiture data receiver by wireless transmission method, realize the radio detection of measured point temperature.The P1.0 pin of one chip microcomputer IC1 is connected with digital temperature sensor IC3, temperature sensor IC3 is the high accuracy number temperature sensor, by temperature sensor IC3 the temperature data of measured point is reached one chip microcomputer IC1 inside, and temperature data is sent to the wireless humiture data receiver by wireless data transmission module IC2.The P1.6 pin of one chip microcomputer IC1 is connected to field effect transistor Q1, closes wireless data transmission module when one chip microcomputer is finished no temperature data acquisition task by control field effect transistor Q1, thereby reaches the purpose of saving of maximum.
Wireless temperature monitoring system device of overheating of electrical device of the present invention, adopting several micro radio digital temperature collectors to be installed in treats near the thermometric equipment point, gather the humiture numerical value of measured point by digital temperature-sensitive/wet element, and and between the outer wireless humiture data receiver of safe distance the wireless data transmission module by 2.4GHz carry out data transmission.Make and effectively avoided contact and potential safety hazards that classic method is brought such as optics thermometric, hygrometric degree in this way.The wireless humiture data receiver detects in real time to facility environment temperature and facility environment humidity, measured point temperature, temperature rise transfinite and equipment overtemperature, super wet situation under in conjunction with protective relaying device and automatically dehydrating unit finish automatic outage and dehumidifying protection automatically.The wireless digital Temperature sampler uses the super low-power consumption design, and has adopted high temperature resistant, long-life, high-capacity battery to provide power supply to supply with, and it can be worked 10 years under maintenance-free situation at least.Adopt the 2.4GHz wireless transmission method, got rid of the potential safety hazard that wire transmission brings in the high voltage alive equipment.
Claims (3)
1. wireless temperature monitoring system device of overheating of electrical device, it is characterized in that: form by wireless humiture data receiver and wireless digital Temperature sampler two parts, adopt the wireless data communication mode to carry out data transmission between wireless digital Temperature sampler and the wireless humiture data receiver, adopting the micro radio Temperature sampler to be installed in treats near the thermometric equipment point, gather the humiture numerical value of measured point by digital temperature-sensitive/wet element, and and between the outer wireless receiver of safe distance the wireless data transmission module by 2.4GHz carry out data transmission; The wireless humiture data receiver, by: one chip microcomputer IC1, storer and house dog IC2, differential bus driver IC 3, wireless data transmission module IC4, low pressure difference linearity pressure regulator IC5, Temperature Humidity Sensor IC6, LCDs LCD, super wet warning output relay JD1 and overtemperature alarm output relay JD2 form, wherein: with single-sheet miniature control computer IC1 is core, is connected to storer and house dog IC2 respectively, differential bus driver IC 3, wireless data transmission module IC4, low pressure difference linearity pressure regulator IC5, Temperature Humidity Sensor IC6, LCDs LCD, super wet warning output relay JD1 and overtemperature alarm output relay JD2; The wireless digital Temperature sampler, by: one chip microcomputer IC1, wireless data transmission module IC2, digital temperature sensor IC3, field effect transistor Q1, high temperature resistance and long life-span lithium hydroxide battery are formed, wherein: with one chip microcomputer IC1 is core, is connected to wireless data transmission module IC2, digital temperature sensor IC3, field effect transistor Q1 respectively.
2. wireless temperature monitoring system device of overheating of electrical device according to claim 1, it is characterized in that: one chip microcomputer IC 1 is the core controller of wireless receiver, and the P0.2 of one chip microcomputer IC1, P0.3, P0.4, P0.5, P0.6, P0.7 pin are connected to wireless data transmission module IC4; The P2.0 of one chip microcomputer IC1, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6, P2.7, P0.0, P0.1, P4.0, P4.1, P4.3 pin are connected to LCDs LCD; The P1.2 of one chip microcomputer IC1, P1.3 pin are connected to Temperature Humidity Sensor IC6; The P1.4 of one chip microcomputer IC1, P1.5, P1.6, P1.7 pin are connected with front mounted buttons; The P3.3 of one chip microcomputer IC1, P3.4, P3.5, P3.7 pin are connected with storer and house dog IC2; The P3.0 of one chip microcomputer IC1, P3.1, P3.2 pin are connected with differential bus driver IC 3; The P1.0 of one chip microcomputer IC1, P1.1 pin are connected with super wet warning output relay JD1, overtemperature alarm output relay JD2 respectively.
3. wireless temperature monitoring system device of overheating of electrical device according to claim 1, it is characterized in that: one chip microcomputer IC 1 is the core controller of wireless temperature collector, the P1.2 of one chip microcomputer IC1, P1.3, P1.4, P1.5 pin are connected with wireless data transmission module IC2, wireless data transmission module adopts the nRF24L01+ chip, 2.4GHz wireless transmission method is sent to one chip microcomputer IC1 temperature inside data in the wireless receiver by wireless transmission method; The P1.0 pin of one chip microcomputer IC1 is connected with digital temperature sensor IC3; The P1.6 pin of one chip microcomputer IC1 is connected to field effect transistor Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910010177A CN101782438A (en) | 2009-01-20 | 2009-01-20 | Wireless temperature monitoring system device of overheating of electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910010177A CN101782438A (en) | 2009-01-20 | 2009-01-20 | Wireless temperature monitoring system device of overheating of electrical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101782438A true CN101782438A (en) | 2010-07-21 |
Family
ID=42522525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910010177A Pending CN101782438A (en) | 2009-01-20 | 2009-01-20 | Wireless temperature monitoring system device of overheating of electrical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101782438A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930869A (en) * | 2010-08-17 | 2010-12-29 | 安徽鑫龙电器股份有限公司 | High-voltage vacuum breaker with contact temperature measurement function and temperature measurement method thereof |
| CN102967329A (en) * | 2012-11-08 | 2013-03-13 | 大连东方电器制造有限公司 | Switch cabinet monitoring alarming device |
| CN103868605A (en) * | 2012-12-12 | 2014-06-18 | 河南省电力公司焦作供电公司 | Electric power transmission temperature detection system |
| CN104900041A (en) * | 2015-06-29 | 2015-09-09 | 攀枝花学院 | Method and system for wireless temperature monitoring of substation equipment |
| CN105115609A (en) * | 2015-08-26 | 2015-12-02 | 芜湖市凯鑫避雷器有限责任公司 | Switch cabinet temperature on-line monitoring system |
| CN108896194A (en) * | 2018-08-06 | 2018-11-27 | 国网浙江余姚市供电有限公司 | Novel electrical contact temperature on-Line Monitor Device based on wireless sensor network |
| CN113839112A (en) * | 2021-08-16 | 2021-12-24 | 北京航空航天大学 | Method for wirelessly measuring internal temperature of battery in situ |
| CN114839524A (en) * | 2022-05-10 | 2022-08-02 | 怀化建南机器厂有限公司 | On-line monitoring outdoor collector for relay protection of power system |
-
2009
- 2009-01-20 CN CN200910010177A patent/CN101782438A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930869A (en) * | 2010-08-17 | 2010-12-29 | 安徽鑫龙电器股份有限公司 | High-voltage vacuum breaker with contact temperature measurement function and temperature measurement method thereof |
| CN102967329A (en) * | 2012-11-08 | 2013-03-13 | 大连东方电器制造有限公司 | Switch cabinet monitoring alarming device |
| CN103868605A (en) * | 2012-12-12 | 2014-06-18 | 河南省电力公司焦作供电公司 | Electric power transmission temperature detection system |
| CN104900041A (en) * | 2015-06-29 | 2015-09-09 | 攀枝花学院 | Method and system for wireless temperature monitoring of substation equipment |
| CN105115609A (en) * | 2015-08-26 | 2015-12-02 | 芜湖市凯鑫避雷器有限责任公司 | Switch cabinet temperature on-line monitoring system |
| CN108896194A (en) * | 2018-08-06 | 2018-11-27 | 国网浙江余姚市供电有限公司 | Novel electrical contact temperature on-Line Monitor Device based on wireless sensor network |
| CN113839112A (en) * | 2021-08-16 | 2021-12-24 | 北京航空航天大学 | Method for wirelessly measuring internal temperature of battery in situ |
| CN114839524A (en) * | 2022-05-10 | 2022-08-02 | 怀化建南机器厂有限公司 | On-line monitoring outdoor collector for relay protection of power system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101782438A (en) | Wireless temperature monitoring system device of overheating of electrical device | |
| CN204405198U (en) | The wireless contact temp measuring system of a kind of high-tension switch cabinet | |
| CN203396898U (en) | Insulator discharge detection device | |
| KR101017903B1 (en) | Deterioration diagnosis system of power utilites connecter | |
| CN207074246U (en) | A kind of GIS partial discharge on-line monitoring system | |
| CN203102580U (en) | Wireless temperature measuring system | |
| CN203100923U (en) | Online temperature measurement device for cable joint | |
| CN201364208Y (en) | Excessive heating wireless temperature monitoring system device of electrical apparatuses | |
| CN109724710A (en) | High-tension switch cabinet touch-screen type micro radio temperature monitoring device and monitoring method | |
| CN102566621A (en) | Wireless temperature monitoring system for electric power device | |
| CN207650985U (en) | A kind of ring main unit environmental monitoring system | |
| CN201788030U (en) | Intelligent wireless temperature-measuring device for bus contact joint | |
| CN201508408U (en) | Intelligent device for wirelessly monitoring state of storage batteries used for direct current screen of transformer substation | |
| CN204479670U (en) | A kind of electrical equipment malfunction detection system | |
| CN102768075A (en) | Temperature early-warning centralized display system | |
| CN203966321U (en) | Switch cubicle temperature measuring equipment | |
| CN107907157A (en) | Remote temperature monitoring device for electric power wire terminal | |
| CN104236741A (en) | Temperature monitoring device and implementation method for outdoor high-pressure switch | |
| CN103364100B (en) | Contact box with built-in over-temperature protection device | |
| CN205403992U (en) | Wireless temperature measuring device for high -voltage switch cabinet | |
| CN202599561U (en) | On-line monitoring device for ring network cabinet | |
| CN108627278A (en) | Temperature monitoring equipment and system | |
| CN204101934U (en) | A kind of absorption type temperature of oil in transformer monitoring alarm device | |
| CN205263986U (en) | Electric fire monitoring and forewarning system based on point type temperature -sensing element | |
| CN100589138C (en) | Hot fault warning system device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100721 |