CN204886397U - Stand -by power supply automatic switch -over circuit - Google Patents
Stand -by power supply automatic switch -over circuit Download PDFInfo
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- CN204886397U CN204886397U CN201520533964.2U CN201520533964U CN204886397U CN 204886397 U CN204886397 U CN 204886397U CN 201520533964 U CN201520533964 U CN 201520533964U CN 204886397 U CN204886397 U CN 204886397U
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- power supply
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- contactor
- relay
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Abstract
The utility model provides a stand -by power supply automatic switch -over circuit, includes an ac contactor (b) KM1 (b) and the 2nd ac contactor KM2, the switching circuit is including postponing control circuit, it has included auxiliary relay KA1, time relay KT1, relay KA2 to postpone control circuit. Postpone control circuit through setting up to it has corresponding delay at the in -process that stand -by power supply is switching to make, and sets up the start -up that stand -by power supply was controlled to auxiliary relay, time relay and relay through the centre in circuit arrangement, makes the reliability of circuit increase simple structure.
Description
Technical field
The utility model relates to equipment power supply control field, particularly a kind of stand-by power supply automatic switch-over circuit.
Background technology
In some production equipment, if line failure, production line does not have electricity can use, very large loss will be brought to production, therefore need to increase stand-by power supply.When the line fault of the main power source got access to grid, stand-by power supply can be produced by automatic switching in production.
Generally utilize one group of A.C. contactor to carry out for the switching of stand-by power supply in prior art, the normally-closed contact of A.C. contactor is connected between stand-by power supply and equipment, the coil termination main power circuit of A.C. contactor, under normal situation powered by main power source, ac contactor coil end contact-actuating is opened, now main power source is powered, when primary power source de-energizes, the tip side of A.C. contactor recovers closed, stand-by power supply power-off, although this kind of mode can solve the switching between main power source and stand-by power supply, but do not consider postpone switching and ration the power supply, if the circuit controlling stand-by power supply switching can accomplish as far as possible few power consumption, to greatly increase operation rate.
Utility model content
It is few that technical problem to be solved in the utility model is to provide a kind of power consumption, and structure simply, controls the stand-by power supply automatic switch-over circuit reliable, efficiency is high.
In order to solve above technical problem, a kind of stand-by power supply automatic switch-over circuit of the utility model, comprises the first A.C. contactor
kM1with the second A.C. contactor KM2, described first A.C. contactor includes main contacts KM1-1, described main contacts KM1-1 is connected between main power source and power consumption equipment, described second A.C. contactor includes main contacts KM2-1, described main contacts KM2-1 is connected between stand-by power supply and power consumption equipment, the coil-end of described first A.C. contactor KM1 is connected to main power circuit, described commutation circuit comprises delay control circuit, described delay control circuit includes auxiliary relay KA1, time relay KT1, relay K A2, power module and not gate, described first A.C. contactor includes auxiliary contact KM1-2, coil-end and the described auxiliary contact KM1-2 of described auxiliary relay KA1 are connected on stand-by power supply loop, described relay K A1 comprises the first contact KA1-1, with the second contact KA1-2, the coil-end of described first contact KA1-1 and time relay KT1 is connected on stand-by power supply loop, the input of described second contact KA1-2 and described power module is connected on stand-by power supply loop, the output of described power module connects not gate, the contact KT1-1 of described time relay KT1 is connected between not gate input and the ground of power module, the output of described not gate controls the coil-end of described relay K A2, the contact KA2-1 of described relay K A2 and the coil-end of the second A.C. contactor KM2 are connected on stand-by power supply loop.
Preferably, described second A.C. contactor KM2 comprises auxiliary contact KM2-2, and described auxiliary contact KM2-2 connects with the coil-end of the first A.C. contactor KM1, and described auxiliary contact KM2-2 is normally-closed contact under normal conditions.
Preferably, described second A.C. contactor KM2 comprises auxiliary contact KM2-3, and the coil-end of described auxiliary contact KM2-3 and time relay KT1 is connected in series.
Preferably, described second A.C. contactor KM2 comprises auxiliary contact KM2-4, and the contact KA2-1 of described auxiliary contact KM2-4 and described relay K A2 is connected in parallel.
Preferably, described second A.C. contactor KM2 comprises auxiliary contact KM2-5, and the coil-end of described auxiliary contact KM2-5 and auxiliary relay KA1 is connected in series.
Preferably, described auxiliary contact KM2-3, auxiliary contact KM2-5 are normally-closed contact under normal conditions, and described auxiliary contact KM2-4 is normally opened contact under normal conditions
Preferably, described power module comprises transformer, regulator rectifier circuit, and described not gate exports and drives relay K A2 by triode.
Preferably, described main contacts KM1-1, main contacts KM2-1, the first contact KA1-1, the second contact KA1-2, contact KT1-1, contact KA2-1 are normally opened contact under normal conditions, and described auxiliary contact KM1-2 is normally-closed contact under normal conditions.
Beneficial effect: by arranging delay control circuit, thus make in the process switched, have corresponding delay at stand-by power supply, and in circuit is arranged, the startup that auxiliary relay, the time relay and relay control stand-by power supply is set by centre, the reliability of circuit is increased, and structure is simple.
By A.C. contactor KM2 normally closed auxiliary contact is connected with the coil-end of A.C. contactor KM1, make before not determining main power source maintenance, it can not be made to continue power supply again even if main power source restores electricity, promote the global reliability of circuit.
Simultaneously, utilize other auxiliary contact of A.C. contactor KM2 to control auxiliary relay, the time relay simultaneously, and use the auxiliary contact of A.C. contactor KM2 to carry out self-locking, make after stand-by power supply normally switches use, this circuit of the coil of A.C. contactor KM2 and auxiliary contact KM2-4 is only had to have electricity, other circuit does not all have electricity, thus reaches the function of rationing the power supply, and decreases line loss.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the circuit diagram of the utility model stand-by power supply automatic switchover embodiment 1.
Embodiment
Embodiment 1:
As shown in Figure 1, a kind of stand-by power supply automatic switch-over circuit of the utility model, comprises the first A.C. contactor
kM1with the second A.C. contactor KM2, described first A.C. contactor includes main contacts KM1-1, described main contacts KM1-1 is connected between main power source and power consumption equipment, described second A.C. contactor includes main contacts KM2-1, described main contacts KM2-1 is connected between stand-by power supply and power consumption equipment, the coil-end of described first A.C. contactor KM1 is connected to main power circuit, it is characterized in that, described commutation circuit comprises delay control circuit, described delay control circuit includes auxiliary relay KA1, time relay KT1, relay K A2, power module and not gate, described first A.C. contactor includes auxiliary contact KM1-2, coil-end and the described auxiliary contact KM1-2 of described auxiliary relay KA1 are connected on stand-by power supply loop, described relay K A1 comprises the first contact KA1-1, with the second contact KA1-2, the coil-end of described first contact KA1-1 and time relay KT1 is connected on stand-by power supply loop, the input of described second contact KA1-2 and described power module is connected on stand-by power supply loop, the output of described power module connects not gate, the contact KT1-1 of described time relay KT1 is connected between not gate input and the ground of power module, the output of described not gate controls the coil-end of described relay K A2, the contact KA2-1 of described relay K A2 and the coil-end of the second A.C. contactor KM2 are connected on stand-by power supply loop.
In the present embodiment, described main contacts KM1-1, main contacts KM2-1, the first contact KA1-1, the second contact KA1-2, contact KT1-1, contact KA2-1 are normally opened contact under normal conditions, and described auxiliary contact KM1-2 is normally-closed contact under normal conditions.Main power source and stand-by power supply are respectively equipped with residual current circuit breaker, fuse before access, and under normal conditions, residual current circuit breaker QS1 and QS2 is closed.Residual current circuit breaker QS1's is closed, the coil of A.C. contactor KM1 is obtained electric, and its main contacts KM1-1 closes, and main power source gives subscriber equipment through residual current circuit breaker QS1, fuse FU1, main contacts KM1-1.Simultaneously, the auxiliary contact KM1-2 of A.C. contactor KM1 disconnects, and auxiliary relay KA1 coil must not be electric, its second contact KA1-2 not adhesive, the transformer T primary side of power module does not have electricity, transformer T secondary side does not also have voltage, and its follow-up circuit does not work, and relay K A2 coil-end does not have voltage, the KA2-1 not adhesive of its contact, A.C. contactor KM2 coil must not be electric, and its main contacts KM2-1 not adhesive, then stand-by power supply can not to subscriber equipment power transmission.
When main power source is because of fault during power-off, A.C. contactor KM1 coil losing electricity, its main contacts KM1-1 disconnects, and the main power source on electrical network disconnects, and user can not obtain electricity from electrical network, and power network line etc. are to be repaired.Simultaneously due to the dead electricity of A.C. contactor KM1 coil, its auxiliary contact KM1-2 is closed, then that the coil of auxiliary relay KA1 is obtained is electric for a phase voltage of stand-by power supply.Obtaining of auxiliary relay KA1 coil is electric, its second contact KA1-2 is made to close on the one hand, thus transformer T primary side obtains electric, after the step-down of transformer T, alternating voltage is sent from secondary side, the direct current of pulsing is obtained again through rectifier UR work, thereafter again through the work of pressurizer IC1, stable+5V direct voltage is obtained at the two ends of electric capacity C2, its first contact KA1-1 is made to close on the other hand, then the coil of time relay KT1 obtains electric, after suitable time delay, its contact KT1-1 closes, the input side input low level of not gate IC2, then the outlet side of not gate IC2 obtains high level, this high level driving transistors VT saturation conduction, thus it is electric to make the coil of relay K A2 obtain, its contact KA2-1 is closed, the coil of A.C. contactor KM2 is finally allowed to obtain electric, the main contacts KM2-1 of KM2 closes, then stand-by power supply is through residual current circuit breaker QS2, fuse FU3, main contacts KM2-1 provide voltage to user.
By arranging delay control circuit, thus make in the process switched, have corresponding delay at stand-by power supply, and in circuit is arranged, the startup that auxiliary relay, the time relay and relay control stand-by power supply being set by centre, the reliability of circuit is increased, and structure is simple.
In the present embodiment, in order to improve reliability, before not determining main power source maintenance, it can not be made to continue power supply again even if main power source restores electricity, for this reason, described second A.C. contactor KM2 comprises auxiliary contact KM2-2, and described auxiliary contact KM2-2 connects with the coil-end of the first A.C. contactor KM1, and described auxiliary contact KM2-2 is normally-closed contact under normal conditions.
When main power source starts normally to work, according to aforementioned principles, the coil of A.C. contactor KM2 must not electricity, and therefore auxiliary contact KM2-2 is in closure state, makes the coil of A.C. contactor KM1 can just often-have-electricity, therefore guarantees main power source normal power supply.And when main power source breaks down, from above-mentioned principle, the coil-end of A.C. contactor KM2 obtains electric, therefore its auxiliary contact KM2-2 will be in off-state, now the coil of A.C. contactor KM1 will disconnect with main power circuit, therefore before non-Repair Confirmation, even if main power source restores electricity, also still adopt stand-by power supply to power, make circuit safer.
In the present embodiment, further can increase the reliability of circuit, save power consumption, because when stand-by power supply is by after normal access user equipment, then no longer need delay control circuit to carry out work, therefore then need its power supply to disconnect, thus save energy and reduce the cost.So in the present embodiment, described second A.C. contactor KM2 comprises auxiliary contact KM2-3, and the coil-end of described auxiliary contact KM2-3 and time relay KT1 is connected in series.Described second A.C. contactor KM2 comprises auxiliary contact KM2-4, and the contact KA2-1 of described auxiliary contact KM2-4 and described relay K A2 is connected in parallel.Described second A.C. contactor KM2 comprises auxiliary contact KM2-5, and the coil-end of described auxiliary contact KM2-5 and auxiliary relay KA1 is connected in series.Described auxiliary contact KM2-3, auxiliary contact KM2-5 are normally-closed contact under normal conditions, and described auxiliary contact KM2-4 is normally opened contact under normal conditions.
A.C. contactor KM2 coil electric, also make that its auxiliary contact KM2-4 is closed, auxiliary contact KM2-3 and KM2-5 disconnects.Auxiliary contact KM2-4's is closed, and achieve auto-lock function, even if contact KA2-1 disconnects like this, the coil of A.C. contactor KM2 still has electricity, and stand-by power supply keeps to customer power supply.And the disconnection of auxiliary contact KM2-3 makes the coil losing electricity of time relay KT1.In addition, the disconnection of auxiliary contact KM2-5 makes the coil losing electricity of auxiliary relay KA1, and its auxiliary contact KA1-2 disconnects, transformer T dead electricity, and relay K A2 is thereafter also without electricity, and its contact KA2-1 disconnects.Due to the auto-lock function of KM2, KM2 still has electricity.Now in control circuit, only have this circuit of the coil of A.C. contactor KM2 and auxiliary contact KM2-4 to have electricity, other circuit does not all have electricity, thus reaches the function of rationing the power supply, and decreases line loss.
By arranging delay control circuit, thus make in the process switched, have corresponding delay at stand-by power supply, and in circuit is arranged, the startup that auxiliary relay, the time relay and relay control stand-by power supply being set by centre, the reliability of circuit is increased, and structure is simple.
By A.C. contactor KM2 normally closed auxiliary contact is connected with the coil-end of A.C. contactor KM1, make before not determining main power source maintenance, it can not be made to continue power supply again even if main power source restores electricity, promote the global reliability of circuit.
Simultaneously, utilize other auxiliary contact of A.C. contactor KM2 to control auxiliary relay, the time relay simultaneously, and use the auxiliary contact of A.C. contactor KM2 to carry out self-locking, make after stand-by power supply normally switches use, this circuit of the coil of A.C. contactor KM2 and auxiliary contact KM2-4 is only had to have electricity, other circuit does not all have electricity, thus reaches the function of rationing the power supply, and decreases line loss.
It is emphasized that protection range of the present utility model is including but not limited to above-mentioned embodiment.It should be pointed out that for a person skilled in the art, under the prerequisite not departing from the utility model principle, can also make some distortion and improvement, these also should be regarded as belonging to protection range of the present utility model.
Claims (8)
1. a stand-by power supply automatic switch-over circuit, comprise the first A.C. contactor KM1 and the second A.C. contactor KM2, described first A.C. contactor includes main contacts KM1-1, described main contacts KM1-1 is connected between main power source and power consumption equipment, described second A.C. contactor includes main contacts KM2-1, described main contacts KM2-1 is connected between stand-by power supply and power consumption equipment, the coil-end of described first A.C. contactor KM1 is connected to main power circuit, it is characterized in that, described commutation circuit comprises delay control circuit, described delay control circuit includes auxiliary relay KA1, time relay KT1, relay K A2, power module and not gate, described first A.C. contactor includes auxiliary contact KM1-2, coil-end and the described auxiliary contact KM1-2 of described auxiliary relay KA1 are connected on stand-by power supply loop, described relay K A1 comprises the first contact KA1-1, with the second contact KA1-2, the coil-end of described first contact KA1-1 and time relay KT1 is connected on stand-by power supply loop, the input of described second contact KA1-2 and described power module is connected on stand-by power supply loop, the output of described power module connects not gate, the contact KT1-1 of described time relay KT1 is connected between not gate input and the ground of power module, the output of described not gate controls the coil-end of described relay K A2, the contact KA2-1 of described relay K A2 and the coil-end of the second A.C. contactor KM2 are connected on stand-by power supply loop.
2. stand-by power supply automatic switch-over circuit according to claim 1, it is characterized in that, described second A.C. contactor KM2 comprises auxiliary contact KM2-2, and described auxiliary contact KM2-2 connects with the coil-end of the first A.C. contactor KM1, and described auxiliary contact KM2-2 is normally-closed contact under normal conditions.
3. stand-by power supply automatic switch-over circuit according to claim 1, is characterized in that, described second A.C. contactor KM2 comprises auxiliary contact KM2-3, and the coil-end of described auxiliary contact KM2-3 and time relay KT1 is connected in series.
4. stand-by power supply automatic switch-over circuit according to claim 3, is characterized in that, described second A.C. contactor KM2 comprises auxiliary contact KM2-4, and the contact KA2-1 of described auxiliary contact KM2-4 and described relay K A2 is connected in parallel.
5. stand-by power supply automatic switch-over circuit according to claim 4, is characterized in that, described second A.C. contactor KM2 comprises auxiliary contact KM2-5, and the coil-end of described auxiliary contact KM2-5 and auxiliary relay KA1 is connected in series.
6. stand-by power supply automatic switch-over circuit according to claim 5, is characterized in that, described auxiliary contact KM2-3, auxiliary contact KM2-5 are normally-closed contact under normal conditions, and described auxiliary contact KM2-4 is normally opened contact under normal conditions.
7. stand-by power supply automatic switch-over circuit according to claim 1, is characterized in that, described power module comprises transformer, regulator rectifier circuit, and described not gate exports and drives relay K A2 by triode.
8. stand-by power supply automatic switch-over circuit according to claim 1, it is characterized in that, described main contacts KM1-1, main contacts KM2-1, the first contact KA1-1, the second contact KA1-2, contact KT1-1, contact KA2-1 are normally opened contact under normal conditions, and described auxiliary contact KM1-2 is normally-closed contact under normal conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533964.2U CN204886397U (en) | 2015-07-22 | 2015-07-22 | Stand -by power supply automatic switch -over circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533964.2U CN204886397U (en) | 2015-07-22 | 2015-07-22 | Stand -by power supply automatic switch -over circuit |
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| CN204886397U true CN204886397U (en) | 2015-12-16 |
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| CN201520533964.2U Expired - Fee Related CN204886397U (en) | 2015-07-22 | 2015-07-22 | Stand -by power supply automatic switch -over circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
| CN106130176A (en) * | 2016-08-29 | 2016-11-16 | 苏州工业园区科佳自动化有限公司 | A kind of band lightning protection miniature double loop power supply switch |
| CN107834695A (en) * | 2017-11-08 | 2018-03-23 | 柏宜照明（上海）股份有限公司 | A kind of fire-fighting equipment power supply with relay protection circuit |
| CN110266099A (en) * | 2019-06-04 | 2019-09-20 | 华电电力科学研究院有限公司 | A kind of three phase mains switching device and its working method |
| CN110601352A (en) * | 2019-10-11 | 2019-12-20 | 云南大红山管道有限公司 | Automatic switching device for main and standby power supplies of lubricating system in long-distance large-pipe-diameter water regulating system and implementation method |
-
2015
- 2015-07-22 CN CN201520533964.2U patent/CN204886397U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
| CN106130176A (en) * | 2016-08-29 | 2016-11-16 | 苏州工业园区科佳自动化有限公司 | A kind of band lightning protection miniature double loop power supply switch |
| CN106130176B (en) * | 2016-08-29 | 2018-07-17 | 苏州工业园区科佳自动化有限公司 | A kind of miniature double loop power supply switch of band lightning protection |
| CN107834695A (en) * | 2017-11-08 | 2018-03-23 | 柏宜照明（上海）股份有限公司 | A kind of fire-fighting equipment power supply with relay protection circuit |
| CN107834695B (en) * | 2017-11-08 | 2024-05-17 | 柏宜照明（上海）股份有限公司 | Fire-fighting equipment power supply with relay protection circuit |
| CN110266099A (en) * | 2019-06-04 | 2019-09-20 | 华电电力科学研究院有限公司 | A kind of three phase mains switching device and its working method |
| CN110266099B (en) * | 2019-06-04 | 2023-11-14 | 华电电力科学研究院有限公司 | Three-phase power supply switching device and working method thereof |
| CN110601352A (en) * | 2019-10-11 | 2019-12-20 | 云南大红山管道有限公司 | Automatic switching device for main and standby power supplies of lubricating system in long-distance large-pipe-diameter water regulating system and implementation method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20180722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |