CN203502536U - Switch cabinet protection circuit broken line monitoring device - Google Patents
Switch cabinet protection circuit broken line monitoring device Download PDFInfo
- Publication number
- CN203502536U CN203502536U CN201320649065.XU CN201320649065U CN203502536U CN 203502536 U CN203502536 U CN 203502536U CN 201320649065 U CN201320649065 U CN 201320649065U CN 203502536 U CN203502536 U CN 203502536U
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- switch
- monitoring device
- power supply
- switch cubicle
- pressing plate
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Abstract
The utility model provides a switch cabinet protection circuit broken line monitoring device comprising a power supply, an electronic switch, an AD conversion module, an MCU, and an MMI. The power supply is connected with the electronic switch, and the electronic switch is connected with a switch cabinet pressing plate protection circuit. The AD conversion module can be used to acquire signals of the switch cabinet pressing plate protection circuit, and can be used to convert the signals into the digital signals, which can be provided for the MCU for the calculation processing. The MCU can be used to control the MMI to display and output the alarming information. The monitoring device has advantages of simple structure, convenient use, low production costs, stable performance, and abilities of improving stability of power supply of power grid, and facilitating repairment and maintenance.
Description
Technical field
The utility model belongs to power monitoring technical field, relates to more specifically a kind of switch cubicle protection circuit breaking monitoring device.
Background technology
At present; power monitoring technical development is rapid; transformer station has all adopted microcomputer protecting device and in operational process; often find that tripping operation loop line breaks down; and the too many detection by protective device self now realizes detection; thereby when breaking down, hard pressing plate or breaking coil be difficult to find to have affected power supply reliability and very easily generation accident.
Summary of the invention
For the deficiencies in the prior art, problem to be solved in the utility model be to provide a kind of simple and reasonable, cost is low, the switch cubicle of easy to use, dependable performance protection circuit breaking monitoring device.
The utility model connects pressing plate to circuit breaker trip wire loop for being exported to for switch cabinet of converting station electric power system protection equipment; prevent clamping circuit contact virtual connection etc. and cause section design in trip(ping) circuit; this loop is monitored in real time, and by outputing node and RS485 communication.
The technical solution of the utility model is:
A kind of switch cubicle protection circuit breaking monitoring device; comprise power supply, electronic switch, AD modular converter, MCU and MMI; described power supply connects described electronic switch; described electronic switch is connected with switch cubicle pressing plate protection loop; described AD modular converter gathers the signal in described switch cubicle pressing plate protection loop; and be converted to digital signal and offer described MCU and carry out calculation process, described MCU controls described MMI and shows output alarm information.MCU(host CPU part): the relevant controls such as the data analysis that AD is gathered is processed, and shows corresponding pilot lamp according to result, output alarm node operation.
Described power acquisition independent switch power supply, output 15V.Level isolation completely before and after independent switch power supply, MCU loop adopts 5V power supply, and monitoring circuit employing+15V, and design the self-protection functions such as overvoltage, overload prevents power fail and affects other loop.
Described electronic switch adopts metal-oxide-semiconductor 2SJ567.Adopt metal-oxide-semiconductor 2SJ567 as the gauge tap of monitoring power supply, with impulse form, regularly on the loop of being monitored, apply monitoring voltage 10ms.
Described MMI comprises that LED light display module and RS485 communication bus upload alarm module.MMI, for user provides the local operation interface to device, comprises that LED light shows and RS485 communication bus is uploaded alarm signal, completes the real-time monitoring and control to this loop.When there is alarm condition, liquid crystal display warning message, data also will be sent to backstage simultaneously, for staff, make corresponding processing.
Described independent switch power supply provides input power by described switch cubicle.
The break-make of isolating switch is controlled in described pressing plate protection loop by the breaking coil being connected with described pressing plate.
Advantage and the good effect that the utlity model has are:
1. simple in structure, easy to use;
2. low cost of manufacture;
3. dependable performance, improves the reliability of mains supply;
4. convenient for maintaining maintenance.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
1-2 with reference to the accompanying drawings below, describes in detail to embodiment of the present utility model:
A kind of switch cubicle protection circuit breaking monitoring device; comprise power supply, electronic switch, AD modular converter, MCU and MMI; described power supply connects described electronic switch; described electronic switch is connected with switch cubicle pressing plate protection loop; described AD modular converter gathers the signal in described switch cubicle pressing plate protection loop; and be converted to digital signal and offer described MCU and carry out calculation process, described MCU controls described MMI and shows output alarm information.MCU(host CPU part): the relevant controls such as the data analysis that AD is gathered is processed, and shows corresponding pilot lamp according to result, output alarm node operation.
Described power acquisition independent switch power supply, output 15V.Level isolation completely before and after independent switch power supply, MCU loop adopts 5V power supply, and monitoring circuit employing+15V, and design the self-protection functions such as overvoltage, overload prevents power fail and affects other loop.
Described electronic switch adopts metal-oxide-semiconductor 2SJ567.Adopt metal-oxide-semiconductor 2SJ567 as the gauge tap of monitoring power supply, with impulse form, regularly on the loop of being monitored, apply monitoring voltage 10ms.
Described MMI comprises that LED light display module and RS485 communication bus upload alarm module.MMI, for user provides the local operation interface to device, comprises that LED light shows and RS485 communication bus is uploaded alarm signal, completes the real-time monitoring and control to this loop.When there is alarm condition, liquid crystal display warning message, data also will be sent to backstage simultaneously, for staff, make corresponding processing.
Described independent switch power supply provides input power by described switch cubicle.
The break-make of isolating switch is controlled in described pressing plate protection loop by the breaking coil being connected with described pressing plate.
Owing to exist monitoring " blind spot " in protection outlet loop, for this Design of Problems the utility model relay protection outlet loop on-Line Monitor Device, its schematic diagram as shown in Figure 2:
The principle that this device adopts is in monitoring circuit, to apply a voltage, and then by the electric current that passes through in AD measuring circuit, thereby judging whether loop exists opens circuit or the phenomenon such as virtual connection.
The loop of monitoring is from the hard pressing plate in protective device exit to breaking coil end opening, outside the scope of this loop in microcomputer protecting device control loop burn out detection, belongs to monitoring blind area.This device adds pulse voltage by electronic switch on the loop of need monitoring, thus the state in the electric current passing through in periodic monitor loop judgement loop.What power acquisition was used is Switching Power Supply design, and front and back level realizes electrical isolation completely, and in monitoring circuit, adopts current-limiting resistance, and assurance is very little by the electric current in loop, can not affect trip(ping) circuit.In loop, increase in addition non-return diode, prevent the impact of large voltage on device, and the voltage in device real-time monitoring device exit, when voltage is system voltage (110V), to can in monitoring circuit, not apply detection voltage, and while detecting voltage to be applied on loop the time very short, be no more than 10ms, so can not affect operations staff, do not check pressing plate current potential suitable for reading, thereby meet the anti-regulation of arranging.
When the conducting of protection outlet loop, detect loop and produce 1mA electric current and produce the voltage signal that is less than 1V, alarm signal is not sent at this moment monitoring.
When the disconnection of protection outlet loop or virtual connection, the electric current in loop is uA level or less, can be judged to by analysis this loop and disconnect, and now starts warning node and lights corresponding LED lamp as alarm signal, also can upload alerting signal by communication simultaneously.
By this monitoring device is installed in transformer station, protection personnel or operations staff be the operation conditions of check protection outlet loop very intuitively.When unusual circumstance, protection personnel carry out maintenance and inspection by the loop to monitored, and assurance system is normally moved.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (6)
1. a switch cubicle is protected circuit breaking monitoring device; it is characterized in that: comprise power supply, electronic switch, AD modular converter, MCU and MMI; described power supply connects described electronic switch; described electronic switch is connected with switch cubicle pressing plate protection loop; described AD modular converter gathers the signal in described switch cubicle pressing plate protection loop; and be converted to digital signal and offer described MCU and carry out calculation process, described MCU controls described MMI and shows output alarm information.
2. switch cubicle is protected circuit breaking monitoring device according to claim 1, it is characterized in that described power acquisition independent switch power supply, output 15V.
3. switch cubicle is protected circuit breaking monitoring device according to claim 1, it is characterized in that, described electronic switch adopts metal-oxide-semiconductor 2SJ567.
4. switch cubicle according to claim 1 protection circuit breaking monitoring device, is characterized in that: described MMI comprises that LED light display module and RS485 communication bus upload alarm module.
5. switch cubicle protection circuit breaking monitoring device according to claim 2, is characterized in that: described independent switch power supply provides input power by described switch cubicle.
6. switch cubicle protection circuit breaking monitoring device according to claim 1, is characterized in that: the break-make of isolating switch is controlled in described pressing plate protection loop by the breaking coil being connected with described pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320649065.XU CN203502536U (en) | 2013-10-21 | 2013-10-21 | Switch cabinet protection circuit broken line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320649065.XU CN203502536U (en) | 2013-10-21 | 2013-10-21 | Switch cabinet protection circuit broken line monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203502536U true CN203502536U (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320649065.XU Expired - Fee Related CN203502536U (en) | 2013-10-21 | 2013-10-21 | Switch cabinet protection circuit broken line monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203502536U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529349A (en) * | 2013-10-21 | 2014-01-22 | 天津市品通电力科技有限公司 | Break monitoring device for protection circuit of switch cabinet |
-
2013
- 2013-10-21 CN CN201320649065.XU patent/CN203502536U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529349A (en) * | 2013-10-21 | 2014-01-22 | 天津市品通电力科技有限公司 | Break monitoring device for protection circuit of switch cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20181021 |