CN204374311U - Open phases of three-phase power source testing circuit - Google Patents
Open phases of three-phase power source testing circuit Download PDFInfo
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- CN204374311U CN204374311U CN201520029803.XU CN201520029803U CN204374311U CN 204374311 U CN204374311 U CN 204374311U CN 201520029803 U CN201520029803 U CN 201520029803U CN 204374311 U CN204374311 U CN 204374311U
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Abstract
The utility model relates to open phases of three-phase power source testing circuit, first optocoupler U1, second optocoupler U2, 3rd optocoupler U3, first LED 1, second LED 2, 3rd LED 3, first triode Q1, second triode Q2, 3rd triode Q3 and the second diode D2, 4th diode D4, 6th diode D6, 1 pin of the first optocoupler U1 diode end is connected with power supply A, 2 pin are connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the first LED 1, the negative electrode of the first LED 1 is connected with the base stage of the first triode Q1, the grounded emitter of the first triode Q1, collector is connected with the negative electrode of the second diode D2, B phase, the connected mode of C phase is with A phase.The utility model can detect which phase phase shortage in civil power accurately, and sends acousto-optic alarm; And circuit is simple, cost is low.
Description
Technical field
The utility model relates to power phase shortage detection technique field, particularly relates to open phases of three-phase power source testing circuit.
Background technology
The principle of three-phase electricity is: when coil rotates in magnetic field, and conductor cutting magnetic force lines can produce induction electromotive force, and its Changing Pattern can represent with sinusoidal curve.If we get three coils, they are differed from mutually 120 degree of angles on locus, three coils still rotate with identical speed in magnetic field, are bound to induce the identical induction electromotive force of three frequencies.Because three coils differ from mutually 120 degree of angles in locus, therefore the electric current produced also is three phase sine change, is called three phase sine alternating current.Three-phase electricity is one group, and amplitude is equal, frequency is equal, phase place differs from mutually the three-phase alternating current of 120 °, by there being the three phase generator of three windings to produce, is industrial conventional power supply.
In actual applications, due to various factors, three-phase electricity often has the defect of power down, for the ups power of three-phase input, when power source loads is threephase load, if ups power itself does not have open-phase protection, so once there is a certain phase power down of three-phase electricity, the consequence caused is: one is power-supply device cisco unity malfunction; Two is power to threephase load, causes load cisco unity malfunction possibly, even damages the harm such as load.
Now this pile defection device is rarely found on the market, and existing this kind of device circuit components and parts are many, and circuit is complicated, and cost is high, and testing result which phase phase shortage can not quote accurately be, use very inconvenient.
Summary of the invention
For solving the problem, the utility model provides a kind of open phases of three-phase power source testing circuit, which phase phase shortage in civil power can be detected accurately, and send acousto-optic alarm; And circuit is simple, cost is low.
The utility model adopts following technical scheme: open phases of three-phase power source testing circuit, it comprises: the first optocoupler U1, second optocoupler U2, 3rd optocoupler U3, first LED 1, second LED 2, 3rd LED 3, first triode Q1, second triode Q2, 3rd triode Q3 and the second diode D2, 4th diode D4, 6th diode D6, 1 pin of described first optocoupler U1 diode end is connected with power supply A, 2 pin are connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the first LED 1, the negative electrode of the first LED 1 is connected with the base stage of the first triode Q1, the grounded emitter of the first triode Q1, collector is connected with the negative electrode of the second diode D2, 1 pin of described second optocoupler U2 diode end is connected with power supply B, 2 pin are connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the second LED 2, the negative electrode of the second LED 2 is connected with the base stage of the second triode Q2, the grounded emitter of the second triode Q2, collector is connected with the negative electrode of the 4th diode D4, 1 pin of the 3rd optocoupler U3 diode end is connected with power supply C, 2 pin are connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the 3rd LED 3, the negative electrode of the 3rd LED 3 is connected with the base stage of the 3rd triode Q3, the grounded emitter of the 3rd triode Q3, collector is connected with the negative electrode of the 6th diode D6, and the anode of described second diode D2, the 4th diode D4, the 6th diode D6 is connected in parallel and is connected with DSP control module, the collector of the anode of described first LED 1, second LED 2, the 3rd LED 3 and the first triode Q1, the second triode Q2, the 3rd triode Q3 is connected respectively to power supply VCC and holds.
Being improved to further technique scheme, the zero line N phase of described three-phase electricity is connected with the negative electrode of the first diode D1, and the anode of the first diode D1 is connected with diode end 2 pin of the first optocoupler U1; The zero line N phase of three-phase electricity is connected with the negative electrode of the 3rd diode D3, and the anode of the 3rd diode D3 is connected with diode end 2 pin of the second optocoupler U2; The zero line N phase of three-phase electricity is connected with the negative electrode of the 5th diode D5, and the anode of the 5th diode D5 is connected with diode end 2 pin of the 3rd optocoupler U3.
Being improved to further technique scheme, be connected with diode end 1 pin of the first optocoupler U1 again after the A phase of described three-phase electricity is connected with the first resistance R1, be connected with diode end 1 pin of the second optocoupler U2 again after the B phase of described three-phase electricity is connected with the 6th resistance R6, be connected with diode end 1 pin of the 3rd optocoupler U3 again after the C phase of described three-phase electricity is connected with the 11 resistance R11.
Being improved to further technique scheme, the 3rd resistance R3 is connected between the negative electrode of described first LED 1 and the base stage of the first triode Q1, be connected the 8th resistance R8 between the negative electrode of the second LED 2 and the base stage of the second triode Q2, the negative electrode of the 3rd LED 3 is connected the 13 resistance R13 with between the base stage of the 3rd triode Q3.
Being improved to further technique scheme, the anode of described first LED 1 is connected the second resistance R2 between holding with power supply VCC, the anode of the second LED 2 is connected the 7th resistance R7 between holding with power supply VCC, and the anode of the 3rd LED 3 is connected the 12 resistance R12 between holding with power supply VCC.
Being improved to further technique scheme, the 5th resistance R5 is connected with between the collector of described first triode Q1 and power supply VCC hold, be connected with the tenth resistance R10 between the collector of the second triode Q2 and power supply VCC hold, between the collector of the 3rd triode Q3 and power supply VCC hold, be connected with the 15 resistance R15.
Being improved to further technique scheme, the base stage of described first triode Q1 is connected rear ground connection with the 4th resistance R4, the base stage of the second triode Q2 is connected rear ground connection with the 9th resistance R9, the base stage of the 3rd triode Q3 is connected rear ground connection with the 14 resistance R14.
Open phases of three-phase power source testing circuit described in the utility model, beneficial effect is compared to existing technology:
Provide three-phase electric power open phase testing circuit, export high and low level by optocoupler and control LED lighting, generation light is reported to the police, and receive high and low level signal by DSP control module, drive buzzer warning, send acoustic alarm simultaneously, the timely reminding user phase shortage of sound and light alarm, reminding user takes appropriate measures in time, reduces the loss; And can find out which mutually phase shortage occurs exactly, detect precisely errorless; This circuit uses little circuit devcie, and circuit connects easy, and cost is low.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model embodiment open phases of three-phase power source testing circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Embodiment:
With reference to Fig. 1, open phases of three-phase power source testing circuit described in the utility model, it comprises the first optocoupler U1, second optocoupler U2, 3rd optocoupler U3, first LED 1, second LED 2, 3rd LED 3, first triode Q1, second triode Q2, 3rd triode Q3 and the second diode D2, 4th diode D4, 6th diode D6, be connected with power supply A again after 1 pin of the first optocoupler U1 diode end is connected with the first resistance R1, 2 pin are connected with the anode of the first diode D1, the negative electrode of the first diode D1 is connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the first LED 1, after the negative electrode of the first LED 1 is connected with the 3rd resistance R3
Be connected with the base stage of the first triode Q1, the grounded emitter of the first triode Q1, collector is connected with the negative electrode of the second diode D2, connect power supply VCC again after the anode of the first LED 1 is connected with the second resistance R2 to hold, connects power supply VCC after the collector of the first triode Q1 is connected with the 5th resistance R5 to hold, the base stage of the first triode Q1 is connected ground connection afterwards with the 4th resistance R4.
Be connected with power supply B again after 1 pin of the second optocoupler U2 diode end is connected with the 6th resistance R6,2 pin are connected with the anode of the 3rd diode D3, the negative electrode of the 3rd diode D3 is connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the second LED 2, the negative electrode of the second LED 2 is connected with the 8th resistance R8 and is connected with the base stage of the second triode Q2 afterwards, the grounded emitter of the second triode Q2, and collector is connected with the negative electrode of the 4th diode D4; Connect power supply VCC again after the anode of the second LED 2 is connected with the 7th resistance R7 to hold, connects power supply VCC after the collector of the second triode Q2 is connected with the tenth resistance R10 and hold, the base stage of the second triode Q2 is connected ground connection afterwards with the 9th resistance R9.
Be connected with power supply C again after 1 pin of the 3rd optocoupler U3 diode end is connected with the 11 resistance R11, 2 pin are connected with the anode of the 5th diode D5, the negative electrode of the 5th diode D5 is connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the 3rd LED 3, be connected with the base stage of the 3rd triode Q3 again after the negative electrode of the 3rd LED 3 is connected with the 13 resistance R13, the grounded emitter of the 3rd triode Q3, collector is connected with the negative electrode of the 6th diode D6, connect power supply VCC again after the anode of the 3rd LED 3 is connected with the 12 resistance R12 to hold, connect power supply VCC after the collector of the 3rd triode Q3 is connected with the 15 resistance R15 to hold, the base stage of the 3rd triode Q3 is connected rear ground connection with the 14 resistance R14.
The anode of the second diode D2, the 4th diode D4, the 6th diode D6 is connected in parallel and is connected with DSP control module.
In Fig. 1, Unit 1 is A phase pile defection, and Unit 2 are B phase pile defection, and Unit 3 are C phase pile defection.Q1, Q2, Q3 are NPN type triode.
When civil power input three-phase electricity is normal, because phase line has high voltage to zero line N, so the first optocoupler U1, second optocoupler U2, the 3rd optocoupler U3 conducting, the first optocoupler U1, the 4 pin output low levels of the second optocoupler U2, the 3rd optocoupler U3, LED 1, LED2, LED3 does not work, triode Q1, Q2, Q3 not conducting, then the negative electrode of D2, D4, D6 is high level by clamper, so A point send DSP control module for high level signal, judge that three-phase alternating current input power supply is normal.
When the arbitrary phase power down of civil power input three-phase electricity, such as during the power down of A phase, because A phase electricity does not access, therefore there is no voltage between 1 pin of the first optocoupler U1 and 2 pin, then the first optocoupler U1 not conducting, output 4 pin of the first optocoupler U1 is pulled up as high level, now, A phase phase shortage pilot lamp LED1 lights, the power down of reminding user three-phase alternating current input A phase, triode Q1 conducting simultaneously, output stage 3 pin of Q1 is low level by clamper, this low level signal gives DSP control module by diode D2, DSP control module judges three-phase alternating current phase shortage, give an order simultaneously and drive buzzer alarm circuit to pipe, reminding user three-phase electricity input phase failure.
With should three-phase electricity input B phase and C phase do not access time, B phase phase shortage pilot lamp and C phase phase shortage pilot lamp are lighted, Q2 and Q3 output low level gives DSP control module by D4 and D6 simultaneously, DSP control module judges three-phase alternating current phase shortage, give an order simultaneously and drive buzzer alarm circuit to pipe, reminding user three-phase electricity input phase failure.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (7)
1. an open phases of three-phase power source testing circuit, it is characterized in that, comprise: the first optocoupler U1, second optocoupler U2, 3rd optocoupler U3, first LED 1, second LED 2, 3rd LED 3, first triode Q1, second triode Q2, 3rd triode Q3 and the second diode D2, 4th diode D4, 6th diode D6, 1 pin of described first optocoupler U1 diode end is connected with power supply A, 2 pin are connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the first LED 1, the negative electrode of the first LED 1 is connected with the base stage of the first triode Q1, the grounded emitter of the first triode Q1, collector is connected with the negative electrode of the second diode D2, 1 pin of described second optocoupler U2 diode end is connected with power supply B, 2 pin are connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the second LED 2, the negative electrode of the second LED 2 is connected with the base stage of the second triode Q2, the grounded emitter of the second triode Q2, collector is connected with the negative electrode of the 4th diode D4, 1 pin of the 3rd optocoupler U3 diode end is connected with power supply C, 2 pin are connected with zero line N, 3 pin ground connection of triode end, 4 pin are connected with the anode of the 3rd LED 3, the negative electrode of the 3rd LED 3 is connected with the base stage of the 3rd triode Q3, the grounded emitter of the 3rd triode Q3, collector is connected with the negative electrode of the 6th diode D6, and the anode of described second diode D2, the 4th diode D4, the 6th diode D6 is connected in parallel and is connected with DSP control module, the collector of the anode of described first LED 1, second LED 2, the 3rd LED 3 and the first triode Q1, the second triode Q2, the 3rd triode Q3 is connected respectively to power supply VCC and holds.
2. open phases of three-phase power source testing circuit according to claim 1, is characterized in that: the zero line N phase of described three-phase electricity is connected with the negative electrode of the first diode D1, and the anode of the first diode D1 is connected with diode end 2 pin of the first optocoupler U1; The zero line N phase of three-phase electricity is connected with the negative electrode of the 3rd diode D3, and the anode of the 3rd diode D3 is connected with diode end 2 pin of the second optocoupler U2; The zero line N phase of three-phase electricity is connected with the negative electrode of the 5th diode D5, and the anode of the 5th diode D5 is connected with diode end 2 pin of the 3rd optocoupler U3.
3. open phases of three-phase power source testing circuit according to claim 1, it is characterized in that: be connected with diode end 1 pin of the first optocoupler U1 again after the A phase of described three-phase electricity is connected with the first resistance R1, be connected with diode end 1 pin of the second optocoupler U2 again after the B phase of described three-phase electricity is connected with the 6th resistance R6, be connected with diode end 1 pin of the 3rd optocoupler U3 again after the C phase of described three-phase electricity is connected with the 11 resistance R11.
4. open phases of three-phase power source testing circuit according to claim 1, it is characterized in that: between the negative electrode of described first LED 1 and the base stage of the first triode Q1, be connected the 3rd resistance R3, be connected the 8th resistance R8 between the negative electrode of the second LED 2 and the base stage of the second triode Q2, the negative electrode of the 3rd LED 3 is connected the 13 resistance R13 with between the base stage of the 3rd triode Q3.
5. open phases of three-phase power source testing circuit according to claim 1, it is characterized in that: the anode of described first LED 1 is connected the second resistance R2 between holding with power supply VCC, the anode of the second LED 2 is connected the 7th resistance R7 between holding with power supply VCC, and the anode of the 3rd LED 3 is connected the 12 resistance R12 between holding with power supply VCC.
6. open phases of three-phase power source testing circuit according to claim 1, it is characterized in that: between the collector of described first triode Q1 and power supply VCC hold, be connected with the 5th resistance R5, be connected with the tenth resistance R10 between the collector of the second triode Q2 and power supply VCC hold, between the collector of the 3rd triode Q3 and power supply VCC hold, be connected with the 15 resistance R15.
7. open phases of three-phase power source testing circuit according to claim 1, it is characterized in that: the base stage of described first triode Q1 is connected rear ground connection with the 4th resistance R4, the base stage of the second triode Q2 is connected rear ground connection with the 9th resistance R9, the base stage of the 3rd triode Q3 is connected rear ground connection with the 14 resistance R14.
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| CN201520029803.XU CN204374311U (en) | 2015-01-15 | 2015-01-15 | Open phases of three-phase power source testing circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116351A (en) * | 2015-08-19 | 2015-12-02 | 许继集团有限公司 | Multi-way power supply failure alarm device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116351A (en) * | 2015-08-19 | 2015-12-02 | 许继集团有限公司 | Multi-way power supply failure alarm device |
| CN105116351B (en) * | 2015-08-19 | 2019-02-05 | 许继集团有限公司 | A kind of multiple power supplies power failure alarm device |
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