CN2809656Y - Phase sequence detection device for three-phase alternating current power supply - Google Patents
Phase sequence detection device for three-phase alternating current power supply Download PDFInfo
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- CN2809656Y CN2809656Y CN 200520026723 CN200520026723U CN2809656Y CN 2809656 Y CN2809656 Y CN 2809656Y CN 200520026723 CN200520026723 CN 200520026723 CN 200520026723 U CN200520026723 U CN 200520026723U CN 2809656 Y CN2809656 Y CN 2809656Y
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- emitting diode
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- detection branch
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- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 238000000819 phase cycle Methods 0.000 title claims abstract description 42
- 239000003990 capacitor Substances 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 15
- 230000007547 defect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model relates to a detection apparatus for three-phase alternating current power supply preface. The reference phase branch circuit is formed by connecting a capacitor and a light-emitting diode in series, the two comparison phase branch circuits are respectively formed by connecting the light-emitting diode and voltage-dividing resistors at two ends of the light-emitting diode in series, and a clamping diode and a current-limiting resistor which are connected with the connection point of the front voltage-dividing resistor and the indication light-emitting diode of the other comparison phase branch circuit are arranged at the connection point of the rear voltage-dividing resistor and the indication light-emitting diode of one comparison. The clamping diodes arranged on the two comparison phase detection branches of the detection device can lead the high potential of the anode of the light emitting diode of one comparison phase detection branch to the cathode end of the indication light emitting diode of the other comparison phase detection branch so as to cut off the indication light emitting diode. Therefore, the indicating light emitting diodes of the two comparative phase detection branches are in a conducting and stopping state during detection, so that the serious defect that the existing simple phase sequence indicator is difficult to distinguish due to the fact that incandescent lamps are similar in light and dark is overcome. Has the outstanding advantages of accurate detection, small volume and convenient use and carrying.
Description
Technical field
The utility model belongs to pick-up unit, particularly relates to a kind of pick-up unit of three-phase alternating-current supply phase sequence.
Background technology
The correct ordering of three-phase alternating-current supply is the pacing items that guarantees the consumer operate as normal, detection to the three-phase alternating-current supply phase sequence at present mainly contains following four kinds of device: a, oscillograph, b, branch road serial connection electric capacity, other two branch roads are connected in series incandescent lamp respectively, three branch roads are the simple phase-order indicator of Y-connection, c, three-phase alternating current micromotor formula phase-sequence meter, d, electronic circuit formula phase-sequence meter.
The detection of above-mentioned simple and easy phase-sequence meter mainly is the different judgement of the brightness phase sequence according to two branch road incandescent lamps, the tested phase line that for example is connected to the branch road terminal connection of capacitor is set at the A phase, the tested phase line that the brighter branch road terminal of incandescent lamp connects must be the B phase, and the tested phase line that the branch road terminal that incandescent lamp is darker connects must be the C phase.This is because the terminal voltage of brighter incandescent lamp is 1.49 times of phase voltages, and the terminal voltage of darker incandescent lamp only is 0.4 times a phase voltage.But the phase voltage of tested three-phase alternating-current supply or phase current two incandescent lamp brightness often occur and are similar to and difficult situation about differentiating under asymmetrical state.Therefore above-mentioned simple and easy phase-sequence meter bright with luminescent device, secretly judge that there is the major defect that can not avoid false judgment in phase sequence.
Summary of the invention
The utility model be for solve described simple and easy phase-sequence meter with bright, secretly judge that there is the possible technical matters of false judgment in phase sequence, and propose a kind of with the whether luminous pick-up unit of judging the three-phase alternating-current supply phase sequence of phase sequence of luminescent device.
The utility model is taked following technical scheme for the technical matters that solves simple and easy phase-sequence meter existence: be provided with three circuit of testing the phase sequence that detection branch is formed by Y-connection in the phase-sequence meter housing, wherein benchmark phase detection branch is in series by capacitor and indication light emitting diode and constitutes, two compare the phase detection branch indicates the front and back divider resistance at light emitting diode two ends to constitute by indicating light emitting diode and being series at respectively respectively, two compare respective terminal that the identical end of phase detection branch connects the phase-sequence meter housing respectively, the capacitance terminal of benchmark phase detection branch is connected in respective terminal of phase-sequence meter housing, and one relatively back divider resistance and the indication light emitting diode tie point of phase detection branch are provided with and connect another divider resistance and indicate the light emitting diode tie point and catching diode and current-limiting resistance thereof that this indication light emitting diode is ended before detection branch mutually.
The utility model can also be taked following technical measures:
Described benchmark phase detection branch, the two ends of its indication light emitting diode are parallel with test line and connect the demonstration light emitting diode.
Described relatively phase detection branch, its indication light emitting diode is made of two light emitting diode series connection, and its two ends are parallel with being connected by survey line of being in series and show light emitting diode and stabilivolt.
Described circuit of testing the phase sequence is provided with by comparing the phase shortage closing control circuit that phase detection branch and photoelectrical coupler constitute; be connected to the controlled end of photoelectrical coupler between its indication light emitting diode and back divider resistance and catching diode and the current-limiting resistance thereof; the control end of photoelectrical coupler is connected in another and compares between phase detection branch test line connection demonstration light emitting diode and stabilivolt branch road and the back divider resistance, and the two ends that the test line that is connected in series is connected demonstration light emitting diode and stabilivolt branch road and photoelectrical coupler control end are connected to the photoelectrical coupler holding circuit that is in series and is constituted by diode and stabilivolt.
Described phase-sequence meter housing, the position of the corresponding relatively phase detection branch of its panel indication light emitting diode is provided with the ordering arrow and the ordering alphabet thereof of expression positive sequence and negative phase-sequence.
The beneficial effects of the utility model with advantage are: this pick-up unit two mutually the set catching diode of detection branch can with one relatively the noble potential of phase detection branch indication light emitting diode positive pole cause another relatively phase detection branch indication light emitting diode negative pole end and make it to end.Therefore, make during detection two relatively the indication light emitting diodes of phase detection branch be a conducting, a cut-off state, thereby avoided existing simple phase-order indicator incandescent lamp bright, secretly approximate and be difficult for the major defect differentiated.This pick-up unit utilizes the lower semiconductor devices of forward voltage not only to be convenient to realize above-mentioned control function, has also substituted the incandescent lamp of simple phase-order indicator.The utlity model has and detect outstanding advantage accurate, that volume is small and exquisite, use is easy to carry.
Description of drawings
Accompanying drawing 1 the utility model embodiment 1 electrical schematic diagram.
Accompanying drawing 2 embodiment 1 shell structure synoptic diagram.
Accompanying drawing 3 the utility model embodiment 2 electrical schematic diagrams.
Number in the figure: 1 housing, 2 panels, 3 ordering arrows, 4 ordering alphabets, 5 connection terminal extension lines, 6 light inlet windows.
Embodiment
Further specify the utility model below in conjunction with embodiment and accompanying drawing thereof.
The back divider resistance R2 of the comparison phase detection branch of circuit middle connecting terminal X2 is provided with indication LED 2 tie points and connects connection terminal the X3 preceding divider resistance R5 of detection branch and the catching diode D2 and the current-limiting resistance R4 thereof that indicate LED 7 tie points mutually.Equally, the back divider resistance R6 of the comparison phase detection branch of connection terminal X3 is provided with the preceding divider resistance R1 of the detection branch mutually that connects connection terminal X2 and the catching diode D1 and the current-limiting resistance R3 thereof that indicate LED 1 tie point with indication LED 8 tie points.
In the circuit, the two ends of the indication LED 4 of benchmark phase detection branch are parallel with test line and connect demonstration LED 5. Indication LED 1,2 two ends of the comparison phase detection branch series connection of connection terminal X2 are parallel with being connected by survey line of being in series and show LED 3 and stabilivolt DW1.Indication LED 7,8 two ends of the comparison phase detection branch series connection of connection terminal X3 are parallel with being connected by survey line of being in series and show LED 6 and stabilivolt DW2.
Connect and show that LED 5, LED3 and LED6 are provided with at light inlet window 6 Fig. 2 panel, respectively corresponding each connection terminal extension line 5.The end of each connection terminal extension line 5 is fixed with the wire clamp (not shown).
Phase-sequence meter housing shown in Figure 21 its panel 2 corresponding relatively phase detection branch indication LEDs 1,2 and LED7,8 position are respectively equipped with expression negative phase-sequence and and ordering alphabet 4.
2 courses of work embodiment illustrated in fig. 3 are summarized as follows: connect to show that LED 5, LED3 and LED6 are complete when bright, illustrate that tested each phase line wiring is reliable, and phase sequence is arranged as embodiment 1, this moment, the comparison phase detection branch of connection terminal X3 provided normal working voltage for photoelectrical coupler G1 control end, its controlled end is a conducting state, and the luminous indication LED 1,2 of the comparison phase detection branch of connection terminal X2 is normal indicating status.If tested phase line is not connected with connection terminal X3, connect and show when LED 6 does not work, photoelectrical coupler G1 control end does not have operating voltage yet, indication LED 1,2 does not work yet, therefore can avoid lacking the luminescence phenomenon that C phase time A, B three-phase current cause indication LED 1,2, can not connect mutually by the more obvious user of informing C.According to the principle of phase shortage closing control circuit as can be known, embodiment 2 also can be used for the phase shortage monitoring simultaneously except that detecting with phase sequence.
The foregoing description only is used to illustrate that typical case of the present utility model uses, but do not limit other application form of the present utility model, for example indication LED 1 and the LED7 with Fig. 1 substitutes with photoelectrical coupler, its output signal is used to drive the LCD of multimeter or other device through conversion, not only can realize showing phase sequence, also will make multimeter or other device increase the function that detects phase sequence with symbol.
Claims (5)
1, the pick-up unit of three-phase alternating-current supply phase sequence, three detection branch by Y-connection are formed, it is characterized in that: be provided with three circuit of testing the phase sequence that detection branch is formed in the phase-sequence meter housing by Y-connection, wherein benchmark phase detection branch is in series by capacitor and indication light emitting diode and constitutes, two compare the phase detection branch indicates the front and back divider resistance at light emitting diode two ends to constitute by indicating light emitting diode and being series at respectively respectively, two compare respective terminal that the identical end of phase detection branch connects the phase-sequence meter housing respectively, the capacitance terminal of benchmark phase detection branch is connected in respective terminal of phase-sequence meter housing, and one relatively back divider resistance and the indication light emitting diode tie point of phase detection branch are provided with and connect another divider resistance and indicate the light emitting diode tie point and catching diode and current-limiting resistance thereof that this indication light emitting diode is ended before detection branch mutually.
2, pick-up unit according to claim 1 is characterized in that: described benchmark phase detection branch, the two ends of its indication light emitting diode are parallel with test line and connect the demonstration light emitting diode.
3, pick-up unit according to claim 1 is characterized in that: described relatively phase detection branch, and its indication light emitting diode is made of two light emitting diode series connection, and its two ends are parallel with being connected by survey line of being in series and show light emitting diode and stabilivolt.
4; pick-up unit according to claim 1; it is characterized in that: described circuit of testing the phase sequence is provided with by comparing the phase shortage closing control circuit that phase detection branch and photoelectrical coupler constitute; be connected to the controlled end of photoelectrical coupler between its indication light emitting diode and back divider resistance and catching diode and the current-limiting resistance thereof; the control end of photoelectrical coupler is connected in another and compares between phase detection branch test line connection demonstration light emitting diode and stabilivolt branch road and the back divider resistance, and the two ends that the test line that is connected in series is connected demonstration light emitting diode and stabilivolt branch road and photoelectrical coupler control end are connected to the photoelectrical coupler holding circuit that is in series and is constituted by diode and stabilivolt.
5, pick-up unit according to claim 1 is characterized in that: described phase-sequence meter housing, the position of the corresponding relatively phase detection branch of its panel indication light emitting diode is provided with the ordering arrow and the ordering alphabet thereof of expression positive sequence and negative phase-sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520026723 CN2809656Y (en) | 2005-07-21 | 2005-07-21 | Phase sequence detection device for three-phase alternating current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520026723 CN2809656Y (en) | 2005-07-21 | 2005-07-21 | Phase sequence detection device for three-phase alternating current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2809656Y true CN2809656Y (en) | 2006-08-23 |
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ID=36925841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520026723 Expired - Fee Related CN2809656Y (en) | 2005-07-21 | 2005-07-21 | Phase sequence detection device for three-phase alternating current power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2809656Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2325663A1 (en) * | 2009-11-20 | 2011-05-25 | Itron Metering Solutions UK Ltd | Three-phase electricity meters with phase monitoring indicator |
| CN102411096A (en) * | 2011-11-14 | 2012-04-11 | 常州捷讯电子有限公司 | Phase sequence judging circuit based on asymmetrical three-phase circuit theory |
| CN102721876A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | Phase sequence detection circuit |
-
2005
- 2005-07-21 CN CN 200520026723 patent/CN2809656Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2325663A1 (en) * | 2009-11-20 | 2011-05-25 | Itron Metering Solutions UK Ltd | Three-phase electricity meters with phase monitoring indicator |
| CN102721876A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | Phase sequence detection circuit |
| CN102411096A (en) * | 2011-11-14 | 2012-04-11 | 常州捷讯电子有限公司 | Phase sequence judging circuit based on asymmetrical three-phase circuit theory |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060823 |