CN203881856U - Three-phase AC phase sequence detecting circuit - Google Patents
Three-phase AC phase sequence detecting circuit Download PDFInfo
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- CN203881856U CN203881856U CN201420272795.7U CN201420272795U CN203881856U CN 203881856 U CN203881856 U CN 203881856U CN 201420272795 U CN201420272795 U CN 201420272795U CN 203881856 U CN203881856 U CN 203881856U
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- phase
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- alternating current
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- phase sequence
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- 238000000819 phase cycle Methods 0.000 title claims abstract description 35
- 239000003990 capacitor Substances 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to a three-phase AC phase sequence detecting circuit, wherein three detecting ends are externally and correspondingly connected with three phases in a to-be-detected three-phase AC power supply electrically. The three-phase AC phase sequence detecting circuit is characterized in that: the three-phase AC phase sequence detecting circuit comprises a rectifying module, an indicating unit and/or driving unit which is electrically connected with the output end of the rectifying module and is driven by a positive input voltage; the first input end of the rectifying module is electrically connected with a first detecting end and a second detecting end in three detecting ends respectively through a first capacitor (C1) and a second resistor (R2); the second input end of the rectifying module is electrically connected with the first detecting end and a third detecting end in the three detecting ends respectively through a first resistor (R1) and a third resistor (R3); and resistance of the second resistor is larger than the resistance of the first resistor and the resistance of the third resistor. The three-phase AC phase sequence detecting circuit has advantages of: simple structure, low cost, and automatic control based on phase sequence detection.
Description
Technical field
The utility model relates to electric technology, is specifically related to a kind of three-phase alternating current circuit of testing the phase sequence.
Background technology
Three-phase alternating current, by three electric system that frequency is identical, electromotive force amplitude equates, the alternating circuit at phase differential mutual deviation 120 degree angles forms, is divided into A phase, B phase and C phase phase line.In prior art, three-phase alternating current is carried out to phase sequence detection, the phase sequence of judgement three-phase alternating current needs professional instrument to detect, such as oscillograph or power quality analyzer, but professional instrument volume is large, and price is high, cause phase order of 3-phase AC testing cost high.
Utility model content
The utility model technical issues that need to address are, how a kind of three-phase alternating current circuit of testing the phase sequence is provided, and can professional instrument detect three-phase alternating current phase sequence, reduce testing cost.
Above-mentioned technical matters of the present utility model solves like this, build a kind of three-phase alternating current circuit of testing the phase sequence, by outside corresponding each phase being electrically connected in three-phase alternating current to be checked in three test sides, it is characterized in that, comprise the indicating member being driven by positive output voltage or driver element that rectification module and output terminal thereof are electrically connected to; The first input end of described rectification module is electrically connected to respectively the first test side and the second test side in three test sides by the first electric capacity and the second resistance, and the second input end of described rectification module is electrically connected to respectively the first test side and the 3rd test side in three test sides by the first resistance and the 3rd resistance; The resistance of the second resistance is greater than the resistance of the first resistance and the resistance of the 3rd resistance.
The three-phase alternating current circuit of testing the phase sequence providing according to the utility model, described rectification module is half-wave rectification, full-wave rectification or bridge rectifier module.
The three-phase alternating current circuit of testing the phase sequence providing according to the utility model, driver element comprises relay and second electric capacity in parallel with it.
The three-phase alternating current circuit of testing the phase sequence providing according to the utility model, driver element also comprises the 4th resistance of connecting with relay.
The three-phase alternating current circuit of testing the phase sequence providing according to the utility model, driver element also comprises five resistance in parallel with relay.
The three-phase alternating current circuit of testing the phase sequence providing according to the utility model, indicating member comprises pilot lamp.
The three-phase alternating current circuit of testing the phase sequence providing according to the utility model, the first test side, the second test side and the 3rd test side are corresponding successively is respectively electrically connected to C phase, B phase and A phase, if phase sequence mistake rectification module Non voltage output.
The three-phase alternating current circuit of testing the phase sequence that the utility model provides, compared with prior art, has following advantage:
1, only must ball bearing made using, reduce and exchange phase sequence testing cost;
2, the driving based on exchanging phase sequence detection, provides basis for automatically controlling.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, further the utility model is elaborated.
Fig. 1 is the electrical block diagram of the three-phase alternating current circuit of testing the phase sequence of the utility model preferred embodiment.
Embodiment
The three-phase alternating current phase sequence testing circuit of the utility model preferred embodiment, circuit structure as shown in Figure 1, comprises resistance R 1-R5, the first capacitor C 1 (claiming again shift capacitor), the second capacitor C 2 (claiming again filter capacitor), commutation diode D1-D4, relay R LY; One end of the first resistance R 1 connects a phase of input three-phase alternating current, the in addition positive pole of one end of one end contact resistance the 3rd R3 and the negative pole of commutation diode D1 and commutation diode D3.The second resistance R 2 connects an other phase of input three-phase alternating current, and other one end of the second resistance R 2 connects the positive level of one end of shift capacitor C1 and the negative pole of commutation diode D4 and commutation diode D2.The 3rd resistance R 3 connects the input third phase of three-phase alternating current and other one end of shift capacitor C1.The positive pole of the positive pole of commutation diode D4 and commutation diode D3 is connected one end of the 5th resistance R 5, filter capacitor C2 and relay R LY.The negative pole of commutation diode D2 is connected one end of the 5th resistance R 5 with the negative pole of commutation diode D3, other one end of R5 connects other one end of the 4th resistance R 4, filter capacitor C2 and relay R LY.
In the present embodiment, the value of R1 and R3 is 330K, and the value of R2 is 561K, and R4 is 10K, and the value of R5 is 15K, and the value of C1 is 0.01uF, and the value of C2 is 100uF; Relay working voltage is 12VDC.
During use, the test side that is positioned at R1-R3 input end is connected respectively to the three-phase of inputting three-phase alternating current, when inputting, phase sequence is correct, for example: R1 connects the A phase of input three-phase alternating current, R2 connects the B phase of input three-phase alternating current, and R3 connects the C phase of input three-phase alternating current; Because the phase shift effect of C1 and the resistance of R2 are greater than R1 and R3, the rectifier bridge output voltage now forming through commutation diode D1-D4, for just, makes relay adhesive, normally opened contact m and p closure.When input phase sequence mistake, for example: R1 connects the B phase of input three-phase alternating current, R2 connects the A phase of input three-phase alternating current, and R3 connects the C phase of input three-phase alternating current; Because the phase shift effect of C1 and the resistance of R2 are greater than R1 and R3, the rectifier bridge output voltage now forming through commutation diode D1-D4 is zero, not adhesive of relay, and normally opened contact m and p are not closed.
The foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim scope change and modify, and all should belong to the covering scope of the utility model claim.
Claims (7)
1. a three-phase alternating current circuit of testing the phase sequence, by outside corresponding each phase being electrically connected in three-phase alternating current to be checked in three test sides, it is characterized in that, this circuit of testing the phase sequence comprise the indicating member being driven by positive output voltage that rectification module and output terminal thereof are electrically connected to and or driver element; The first input end of described rectification module is electrically connected to respectively the first test side and the second test side in three test sides by the first electric capacity (C1) and the second resistance (R2), and the second input end of described rectification module is electrically connected to respectively the first test side and the 3rd test side in three test sides by the first resistance (R1) and the 3rd resistance (R3); The resistance of the second resistance is greater than the resistance of the first resistance and the resistance of the 3rd resistance.
2. three-phase alternating current circuit of testing the phase sequence according to claim 1, is characterized in that, described rectification module is half-wave rectification, full-wave rectification or bridge rectifier module (D1+D2+D3+D4).
3. three-phase alternating current circuit of testing the phase sequence according to claim 2, is characterized in that, driver element comprises relay (RLY) and second electric capacity (C2) in parallel with it.
4. three-phase alternating current circuit of testing the phase sequence according to claim 3, is characterized in that, driver element also comprises the 4th resistance (R4) of connecting with relay (RLY).
5. three-phase alternating current circuit of testing the phase sequence according to claim 4, is characterized in that, driver element also comprises five resistance (R5) in parallel with relay (RLY).
6. three-phase alternating current circuit of testing the phase sequence according to claim 2, is characterized in that, indicating member comprises pilot lamp.
7. according to three-phase alternating current circuit of testing the phase sequence described in any one in claim 1-6, it is characterized in that, the first test side, the second test side and the 3rd test side difference be corresponding C phase, B phase and the A phase of being electrically connected to successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420272795.7U CN203881856U (en) | 2014-05-26 | 2014-05-26 | Three-phase AC phase sequence detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420272795.7U CN203881856U (en) | 2014-05-26 | 2014-05-26 | Three-phase AC phase sequence detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881856U true CN203881856U (en) | 2014-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420272795.7U Expired - Lifetime CN203881856U (en) | 2014-05-26 | 2014-05-26 | Three-phase AC phase sequence detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881856U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253212A (en) * | 2016-08-24 | 2016-12-21 | 国网山东省电力公司单县供电公司 | A kind of lack zero, phase shortage, phase sequence mistake power-off protection apparatus |
-
2014
- 2014-05-26 CN CN201420272795.7U patent/CN203881856U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253212A (en) * | 2016-08-24 | 2016-12-21 | 国网山东省电力公司单县供电公司 | A kind of lack zero, phase shortage, phase sequence mistake power-off protection apparatus |
| CN106253212B (en) * | 2016-08-24 | 2018-07-31 | 国网山东省电力公司单县供电公司 | One kind lacking zero, phase shortage, phase sequence mistake power-off protection apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |