CN204536399U - A kind of alterating and direct current detection system - Google Patents
A kind of alterating and direct current detection system Download PDFInfo
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- CN204536399U CN204536399U CN201520217018.7U CN201520217018U CN204536399U CN 204536399 U CN204536399 U CN 204536399U CN 201520217018 U CN201520217018 U CN 201520217018U CN 204536399 U CN204536399 U CN 204536399U
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Abstract
The utility model relates to detection system technical field, discloses a kind of alterating and direct current detection system, comprising: the first light emitting diode, the second light emitting diode and current-limiting resistance; First light emitting diode and the second light emitting diode reverse parallel connection form parallel circuit; The first end of parallel circuit is connected with power supply to be measured, and the second end of parallel circuit is by current-limiting resistance ground connection.The utility model is based on the unilateral conduction of diode, by two light emitting diode reverse parallel connections, when having, electric current positive flow is out-of-date, LED lighting, can not only detect alternating current and direct current, and the polarity of galvanic positive-negative power can also be detected, be conducive to the use of consumer, ensure that carrying out smoothly of production operation on the one hand, prevent consumer not to be burned on the other hand, on the basis reducing use cost, ensure the personal safety of staff.The utility model also have structure simple, be convenient to the feature safeguarded, use cost is low.
Description
Technical field
The utility model relates to detection system technical field, is mainly applicable to alterating and direct current detection system.
Background technology
Current, generally there are the direct supply of 220V and the AC power of 220V in the electrical secondary system of generating plant, transformer station, electric substation etc.Conventional low pressure electroscope is composed in series by neon bulb and current-limiting resistance, cannot distinguish alternating current and the direct current of 220V, more can not distinguish the polarity of the galvanic positive-negative power of 220V.If alternating current and direct current and galvanic positive-negative power polarity cannot be distinguished, then be unfavorable for the use of consumer, carrying out smoothly of production operation may be hindered, time serious, also consumer can be burnt out, not only increase use cost, but also the personal safety of staff is worked the mischief.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of alterating and direct current detection system, and it can not only detect alternating current and direct current, and can also detect the polarity of galvanic positive-negative power.
For solving the problems of the technologies described above, the utility model provides a kind of alterating and direct current detection system, comprising: the first light emitting diode, the second light emitting diode and current-limiting resistance; Described first light emitting diode and described second light emitting diode reverse parallel connection form parallel circuit; The first end of described parallel circuit is connected with power supply to be measured, and the second end of described parallel circuit is by described current-limiting resistance ground connection.
Further, the pressure drop of described first light emitting diode and described second light emitting diode is all between 2-2.5V; The resistance of described current-limiting resistance is 100K Ω, and is
watt metal film current-limiting resistance.
The beneficial effects of the utility model are:
The alterating and direct current detection system that the utility model provides, based on the unilateral conduction of diode, by two light emitting diode reverse parallel connections, when having, electric current positive flow is out-of-date, LED lighting, alternating current and direct current can not only be detected, and the polarity of galvanic positive-negative power can also be detected, be conducive to the use of consumer, ensure that carrying out smoothly of production operation on the one hand, prevent consumer not to be burned on the other hand, on the basis reducing use cost, ensure the personal safety of staff.The utility model also have structure simple, be convenient to the feature safeguarded, use cost is low.
Accompanying drawing explanation
The circuit diagram of the alterating and direct current detection system that Fig. 1 provides for the utility model embodiment.
Embodiment
For setting forth the utility model further for the technological means reaching predetermined utility model object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, be described in detail to according to the embodiment of alterating and direct current detection system that the utility model proposes and principle of work.
See Fig. 1, the alterating and direct current detection system that the utility model embodiment provides, comprising: the first light emitting diode, the second light emitting diode and current-limiting resistance; First light emitting diode and the second light emitting diode reverse parallel connection form parallel circuit; The first end (a end) of parallel circuit is connected with power supply to be measured, and second end (b end) of parallel circuit is by current-limiting resistance ground connection.The selection of the parameter of the first light emitting diode, the second light emitting diode and current-limiting resistance needs to ensure when there being electric current to flow through the first light emitting diode and the second light emitting diode, LED lighting.
The control power supply of transformer station applies the direct supply of 220V usually, and direct supply is generally provided by HF switch, and system monitoring direct supply both positive and negative polarity current-limiting resistance over the ground, is generally set to 99.9K Ω.Thus and the resistance connecing the current-limiting resistance of this circuit can not be less than 99.9K Ω in the state of the equilibrium, direct supply voltage-to-ground is+110V and-110V.For anti-locking system generation misoperation, to the test of direct supply, the current-limiting resistance of equivalence must be greater than 99.9K Ω.Again because the drive current of common light emitting diode is 1-2mA, thus in the utility model embodiment, the pressure drop of the first light emitting diode and the second light emitting diode is all between 2-2.5V, and the first light emitting diode is red common light emitting diode, the second light emitting diode is green common light emitting diode; The resistance of current-limiting resistance is 100K Ω, and is
watt metal film current-limiting resistance.
When detected circuit is DC220V, diode drive current is:
When detected circuit is AC220V, diode drive current is:
Visible, the selection of above-mentioned components and parts, can not only meet the performance requirement of detected circuit, and can reach the drive current of light emitting diode.
In the utility model embodiment, the first end (a end) of parallel circuit is connected with the positive pole of the first light emitting diode.During detection, the first end (a end) of parallel circuit is connect test line, the second end (b end) ground connection.When red light emitting diodes is bright, tested end is the positive pole of the direct supply of 220V; When green LED is bright, tested end is the negative pole of the direct supply of 220V; Hot green light emitting diode complete bright time, tested end is the AC power live wire of 220V; If red and green luminous diode does not all work, tested end is without electricity.
After the utility model embodiment is made into material object, in all previous installation, debugging, fault handling, obtain application.Detect sensitive, reliability is high, and flase drop situation does not occur, and improves construction and accident treatment speed, effectively ensure that normally carrying out of production operation.
The alterating and direct current detection system that the utility model embodiment provides, based on the unilateral conduction of diode, by two light emitting diode reverse parallel connections, when having, electric current positive flow is out-of-date, LED lighting, alternating current and direct current can not only be detected, and the polarity of galvanic positive-negative power can also be detected, be conducive to the use of consumer, ensure that carrying out smoothly of production operation on the one hand, prevent consumer not to be burned on the other hand, on the basis reducing use cost, ensure the personal safety of staff.The utility model embodiment also have structure simple, be convenient to the feature safeguarded, use cost is low.
It should be noted last that, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to example, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (2)
1. an alterating and direct current detection system, is characterized in that, comprising: the first light emitting diode, the second light emitting diode and current-limiting resistance; Described first light emitting diode and described second light emitting diode reverse parallel connection form parallel circuit; The first end of described parallel circuit is connected with power supply to be measured, and the second end of described parallel circuit is by described current-limiting resistance ground connection.
2. alterating and direct current detection system as claimed in claim 1, it is characterized in that, the pressure drop of described first light emitting diode and described second light emitting diode is all between 2-2.5V; The resistance of described current-limiting resistance is 100K Ω, and is
watt metal film current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520217018.7U CN204536399U (en) | 2015-04-10 | 2015-04-10 | A kind of alterating and direct current detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520217018.7U CN204536399U (en) | 2015-04-10 | 2015-04-10 | A kind of alterating and direct current detection system |
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| Publication Number | Publication Date |
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| CN204536399U true CN204536399U (en) | 2015-08-05 |
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| CN201520217018.7U Active CN204536399U (en) | 2015-04-10 | 2015-04-10 | A kind of alterating and direct current detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680821A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of novel tooling circuit applied to BMS detections |
-
2015
- 2015-04-10 CN CN201520217018.7U patent/CN204536399U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680821A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of novel tooling circuit applied to BMS detections |
| CN108680821B (en) * | 2018-05-28 | 2020-12-08 | 天津市捷威动力工业有限公司 | Be applied to novel frock circuit that BMS detected |
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