CN203572900U - Broken line detection circuit for state grid special transformer collection terminal control circuit - Google Patents
Broken line detection circuit for state grid special transformer collection terminal control circuit Download PDFInfo
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- CN203572900U CN203572900U CN201320614470.8U CN201320614470U CN203572900U CN 203572900 U CN203572900 U CN 203572900U CN 201320614470 U CN201320614470 U CN 201320614470U CN 203572900 U CN203572900 U CN 203572900U
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- terminal control
- detection circuit
- acquisition terminal
- control loop
- resistance
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Abstract
The utility model relates to a broken line detection circuit for a state grid special transformer collection terminal control circuit. The detection circuit comprises an AC optical coupler with a collector electrode and an emitter electrode. A first terminal of the collector electrode is connected to a connecting cable of an external controlled object via a first current limiting resistor and one end of a normally open contact of a relay of a special transformer collection terminal control circuit successively. A second terminal of the collector electrode is connected to another connecting cable of the external controlled object via a second current limiting resistor and another end of the normally open contact of the relay of the special transformer collection terminal control circuit successively. A first terminal of the emitter electrode is connected to a CPU signal input terminal via a bidirectional TVS tube, and a second terminal of the emitter electrode is connected to the CPU signal input terminal via a third resistor, a capacitor being connected between the first and the second terminals of the emitter electrode. The CPU signal input terminal is further connected to an external power source via a fourth resistor. The detection circuit is simple in structure, smart in design, and high in safety and reliability. The detection circuit can effectively detect broken line situations of the special transformer collection terminal control circuit.
Description
Technical field
The utility model relates to a kind of break detection circuit, and especially a kind of national grid specially becomes acquisition terminal control loop break detection circuit.
Background technology
According to the knowledge of the applicant, the critical function that national grid specially becomes acquisition terminal is to control output function, by pilot relay, exports to control user power utilization and loads.But in actual application, often owing to specially becoming the stube cable appearance broken string between acquisition terminal and controlled device, cannot realize the object of control overhead.Along with constantly improving and enhancing of national grid power information acquisition terminal function, the reliability of special change acquisition terminal being controlled to output also proposes higher requirement, needs the technical scheme that can detect broken string situation badly.
Utility model content
The purpose of this utility model is: the problem existing for above-mentioned prior art, and propose a kind of national grid and specially become acquisition terminal control loop break detection circuit, can effectively detect special change acquisition terminal control loop and whether break.
In order to reach above object, the technical solution of the utility model is as follows:
A kind of national grid specially becomes acquisition terminal control loop break detection circuit, it is characterized in that, comprise the interchange optocoupler with collector and emitter, described collector first end is successively through the first current-limiting resistance, specially become one end of acquisition terminal control loop relay normally open contact and a stube cable of outside controlled device is connected, and described collector the second end is successively through the second current-limiting resistance, specially become the other end of acquisition terminal control loop relay normally open contact and another stube cable of outside controlled device is connected; Described emitter first end is connected with cpu signal input end through two-way TVS pipe, and described emitter the second end is connected with described cpu signal input end through the 3rd resistance, between first, second end of described emitter, is connected with capacitor; Described cpu signal input end is also connected with external power source through the 4th resistance.
When this structure is used, if controlled device stube cable state is normal, exchange conducting between the collector of optocoupler and emitter, whole testing circuit is to the pulse signal of cpu signal input end output rule; If there is broken string in controlled device stube cable, exchange optocoupler collector no current and flow through, exchange optocoupler in cut-off state, whole testing circuit continues to cpu signal input end output high level.
The utility model further perfect technical scheme is as follows:
Preferably, between first, second end of described collector, be also connected with capacitor.
Preferably, described first, second current-limiting resistance is identical, and forms by two resistor in series.
Preferably, described emitter first end is also through wire ground connection.
Preferably, the resistance value of described the 3rd resistance is less than the resistance value of the 4th resistance.
The utility model is simple in structure, is skillfully constructed, and has higher safety and reliability, can effectively detect the broken string situation of special change acquisition terminal control loop.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
Embodiment
The national grid of the present embodiment specially becomes acquisition terminal control loop by break detection circuit basic structure as shown in Figure 1, comprise the interchange optocoupler U10 with collector and emitter, collector first end 1 successively through the first current-limiting resistance R33 with R32, specially become one end 6 of acquisition terminal control loop relay normally open contact and a stube cable of outside controlled device is connected, collector the second end 2 successively through the second current-limiting resistance R34 with R35, specially become the other end 7 of acquisition terminal control loop relay normally open contact and another stube cable of outside controlled device is connected; Emitter first end 3 is connected with cpu signal input end LC_DX through two-way TVS pipe D11, and emitter the second end 4 is connected with cpu signal input end LC_DX through the 3rd resistance R 44, between first, second end 1,2 of emitter, is connected with capacitor C28; Cpu signal input end LC_DX is also connected with external power source VCC through the 4th resistance R 12.Between two cables of outside controlled device, voltage is AC220V.
In addition, between first, second end 1,2 of collector, be also connected with capacitor C24.First, second current-limiting resistance is identical, and is in series by two resistors (R33 and R32 or R34 and R35).Emitter first end 3 is also through wire ground connection.The resistance value of the 3rd resistance R 44 is less than the resistance value of the 4th resistance R 12.
During use, if controlled device stube cable state is normal, exchange conducting between the collector of optocoupler U10 and emitter, whole testing circuit is to the 100Hz pulse signal of cpu signal input end output rule; If there is broken string in controlled device stube cable, exchange optocoupler U10 collector no current and flow through, exchange optocoupler U10 in cut-off state, whole testing circuit continues to cpu signal input end output high level.Can effectively detect the broken string situation of special change acquisition terminal control loop like this, and whole circuit structure is simple, there is higher safety and reliability.
In addition, owing to specially becoming acquisition terminal, adopt pulsed to control output, in 1 minute cycle, pulsewidth is 3s ± 100ms, therefore it controls output, can not have influence on the burn out detection of the present embodiment circuit.
It should be noted that, the present embodiment circuit all adopts conventional method of the prior art when operation, does not have any improvement to method.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (5)
1. a national grid specially becomes acquisition terminal control loop break detection circuit, it is characterized in that, comprise the interchange optocoupler with collector and emitter, described collector first end is successively through the first current-limiting resistance, specially become one end of acquisition terminal control loop relay normally open contact and a stube cable of outside controlled device is connected, and described collector the second end is successively through the second current-limiting resistance, specially become the other end of acquisition terminal control loop relay normally open contact and another stube cable of outside controlled device is connected; Described emitter first end is connected with cpu signal input end through two-way TVS pipe, and described emitter the second end is connected with described cpu signal input end through the 3rd resistance, between first, second end of described emitter, is connected with capacitor; Described cpu signal input end is also connected with external power source through the 4th resistance.
2. national grid according to claim 1 specially becomes acquisition terminal control loop break detection circuit, it is characterized in that, between first, second end of described collector, is also connected with capacitor.
3. national grid according to claim 2 specially becomes acquisition terminal control loop break detection circuit, it is characterized in that, described first, second current-limiting resistance is identical, and forms by two resistor in series.
4. national grid according to claim 3 specially becomes acquisition terminal control loop break detection circuit, it is characterized in that, described emitter first end is also through wire ground connection.
5. national grid according to claim 4 specially becomes acquisition terminal control loop break detection circuit, it is characterized in that, the resistance value of described the 3rd resistance is less than the resistance value of the 4th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614470.8U CN203572900U (en) | 2013-09-30 | 2013-09-30 | Broken line detection circuit for state grid special transformer collection terminal control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614470.8U CN203572900U (en) | 2013-09-30 | 2013-09-30 | Broken line detection circuit for state grid special transformer collection terminal control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572900U true CN203572900U (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320614470.8U Expired - Fee Related CN203572900U (en) | 2013-09-30 | 2013-09-30 | Broken line detection circuit for state grid special transformer collection terminal control circuit |
Country Status (1)
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| CN (1) | CN203572900U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297620B (en) * | 2014-10-20 | 2017-08-25 | 国网四川省电力公司电力科学研究院 | A kind of break detection circuit for electric power special transformer acquisition terminal |
| CN116667266A (en) * | 2023-07-21 | 2023-08-29 | 烟台东方威思顿电气有限公司 | High-reliability special transformer acquisition terminal |
| CN116840740A (en) * | 2023-08-25 | 2023-10-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
-
2013
- 2013-09-30 CN CN201320614470.8U patent/CN203572900U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297620B (en) * | 2014-10-20 | 2017-08-25 | 国网四川省电力公司电力科学研究院 | A kind of break detection circuit for electric power special transformer acquisition terminal |
| CN116667266A (en) * | 2023-07-21 | 2023-08-29 | 烟台东方威思顿电气有限公司 | High-reliability special transformer acquisition terminal |
| CN116667266B (en) * | 2023-07-21 | 2023-10-20 | 烟台东方威思顿电气有限公司 | High-reliability special transformer acquisition terminal |
| CN116840740A (en) * | 2023-08-25 | 2023-10-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
| CN116840740B (en) * | 2023-08-25 | 2023-11-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170410 Address after: Run Qi Road Jiangning District Nanjing city Jiangsu province 211103 No. 86 Patentee after: ELEFIRST SCIENCE & TECH Co.,Ltd. Address before: Run Qi Road Jiangning District Nanjing city Jiangsu province 211103 No. 86 Patentee before: JIANGSU SUYUAN GUANGYI SCIENCE & TECHNOLOGY Co.,Ltd. |
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| 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: 20140430 Termination date: 20210930 |