CN109167427A - A kind of power supply system - Google Patents
A kind of power supply system Download PDFInfo
- Publication number
- CN109167427A CN109167427A CN201810987388.7A CN201810987388A CN109167427A CN 109167427 A CN109167427 A CN 109167427A CN 201810987388 A CN201810987388 A CN 201810987388A CN 109167427 A CN109167427 A CN 109167427A
- Authority
- CN
- China
- Prior art keywords
- contactor
- power
- power supply
- coil
- normally opened
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Abstract
The invention discloses a kind of power supply systems, belong to field of electrical control.The power supply system includes the first AC power source, the second AC power source, uninterruptible power supply, first contactor, second contactor, the first power state detection relay and second source state-detection relay, the normally opened contact of first contactor is connected on the circuit between the output end of uninterruptible power supply and power load, the normally opened contact of the coil-end of first contactor and the first power state detection relay is cascaded, and the coil-end of the first power state detection relay is electrically connected with uninterruptible power supply；The normally opened contact of second contactor is connected on the circuit between the second AC power source and the input terminal of power load, and the normally opened contact of the coil-end of second contactor, the normally-closed contact of the first power state detection relay and second source state-detection relay is cascaded.Present invention can ensure that continuing to power to power load.
Description
Technical field
The invention belongs to field of electrical control, in particular to a kind of power supply system.
Background technique
Power supply system is used to power load and provides the device of electric energy.Large-scale power load, such as large size are set
For standby, need to guarantee that it can continue to operate normally, so the reliability and continuous power supply capacity to power supply system have very
High requirement.
However, since mains AC has uncontrollability, so supplying if mains AC is used only equipment
Electricity, then once there is power outage, it will cause equipment to be stopped transport, cause a large amount of economic loss.
Summary of the invention
The embodiment of the invention provides a kind of power supply systems, it is ensured that continues to power to power load.The technical side
Case is as follows:
The embodiment of the invention provides a kind of power supply system, the power supply system includes the first AC power source, the second exchange
Power supply, uninterruptible power supply, first contactor, second contactor, the first power state detection relay and the inspection of second source state
Relay is surveyed, first AC power source is electrically connected with the input terminal of the uninterruptible power supply, the output of the uninterruptible power supply
End is electrically connected with the input terminal of power load, and the normally opened contact of the first contactor is connected on the output of the uninterruptible power supply
On circuit between end and the power load, the coil-end of the first contactor and the first power state detection relay
The normally opened contact of device is cascaded and is connected in parallel between the uninterruptible power supply and the normally opened contact of the first contactor
On circuit, the coil-end of the first power state detection relay is electrically connected with the uninterruptible power supply；
The output end of second AC power source is electrically connected with the input terminal of the power load, the second contactor
Normally opened contact is connected on the circuit between second AC power source and the input terminal of the power load, second contact
The coil-end of device, the normally-closed contact of the first power state detection relay and the second source state-detection relay
Normally opened contact is cascaded and and is connected between second AC power source and the normally opened contact of the second contactor
On circuit.
In a kind of implementation of the invention, the second contactor further includes normally-closed contact, the second contactor
Normally-closed contact be connected on the normally opened contact of the first power state detection relay and the coil-end of the first contactor
Between.
In another implementation of the invention, the first contactor further includes normally-closed contact, first contact
The normally-closed contact of device is connected on the normally opened contact of the second source state-detection relay and the coil of the second contactor
Between end.
In another implementation of the invention, the normally opened contact of the first contactor and the second contactor
Mechanical interlock is provided between normally opened contact.
In another implementation of the invention, first AC power source is 380V alternating current.
In another implementation of the invention, the coil-end of the first contactor is 380V AC coil.
In another implementation of the invention, second AC power source is 380V alternating current.
In another implementation of the invention, the coil-end of the second contactor is 380V AC coil.
In another implementation of the invention, the output end of the uninterruptible power supply includes U1Binding post, V1Wiring
Column, W1Binding post, the input terminal of the power load include three-phase terminal, the U1Binding post, the V1It is binding post, described
W1Binding post is electrically connected with the three-phase terminal of the power load respectively, the coil-end of the first contactor and described first
The normally opened contact of power state detection relay be cascaded and with the V1Binding post and the W1Binding post forming circuit.
In another implementation of the invention, the output end of second AC power source includes U2Binding post, V2Wiring
Column, W2Binding post, the input terminal of the power load include three-phase terminal, the U2Binding post, the V2It is binding post, described
W2Binding post is electrically connected with the three-phase terminal of the power load respectively, the first power state detection relay it is normally closed
The normally opened contact of contact and the second source state-detection relay be cascaded and with the V2Binding post and the W2It connects
Terminal forming circuit.
Technical solution provided in an embodiment of the present invention has the benefit that
When the power supply system provided by the embodiment of the present invention is powered power load, by uninterruptible power supply and conduct
Main electricity, when uninterruptible power supply work normally when, the coil-end of the first power state detection relay obtain it is electric so that first
The normally opened contact of power state detection relay is closed, and the normally-closed contact of the first power state detection relay disconnects, so that the
The coil-end of one contactor obtain it is electric, and the coil-end of second contactor power off, thus realize uninterruptible power supply to power load supply
Electricity.When uninterruptible power supply breaks down, and the second AC power source works normally, the coil of the first power state detection relay
End power-off, the coil-end of second source state-detection relay obtain it is electric so that the normally opened touching of the first power state detection relay
Point disconnects, the normally-closed contact closure of the first power state detection relay, the normally opened contact of second source state-detection relay
Closure, so that the coil-end of first contactor power off, and the coil-end of second contactor obtains electric, and then realizes that second exchanges
Power supply is powered to power load.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the circuit diagram of power supply system provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
The embodiment of the invention provides a kind of power supply system, as shown in Figure 1, power supply system includes the first AC power source 1, the
Two AC power sources 2, uninterruptible power supply 3, first contactor KM1, second contactor KM2, the first power state detection relay KA1
With second source state-detection relay KA2, the first AC power source 1 is electrically connected with the input terminal of uninterruptible power supply 3, uninterrupted electricity
The output end in source 3 is electrically connected with the input terminal of power load 4, and the normally opened contact of first contactor KM1 is connected on uninterruptible power supply 3
Output end and power load 4 between circuit on, the coil-end of first contactor KM1 and the first power state detection relay
The normally opened contact of KA1 is cascaded and is connected in parallel on the circuit between uninterruptible power supply 3 and the normally opened contact of first contactor KM1
On, the coil-end of the first power state detection relay KA1 is electrically connected with uninterruptible power supply 3.
The output end of second AC power source 2 is electrically connected with the input terminal of power load 4, the normally opened touching of second contactor KM2
Point is connected on the circuit between the second AC power source 2 and the input terminal of power load 4, the coil-end of second contactor KM2, the
The normally-closed contact of one power state detection relay KA1 and the normally opened contact of second source state-detection relay KA2 are connected on
Together and and the circuit that is connected between the second AC power source 2 and the normally opened contact of second contactor KM2 on.
When the power supply system provided by the embodiment of the present invention is powered power load 4, by uninterruptible power supply 3 and make
For main electricity, when uninterruptible power supply 3 works normally, the coil-end of the first power state detection relay KA1 obtains electric, makes
Obtain the normally opened contact closure of the first power state detection relay KA1, the normally-closed contact of the first power state detection relay KA1
It disconnects, so that the coil-end of first contactor KM1 obtains electric, and the coil-end of second contactor KM2 is powered off, to realize uninterrupted
Power supply 3 is powered to power load 4.When uninterruptible power supply 3 breaks down, and the second AC power source 2 works normally, the first power supply
The coil-end of state-detection relay KA1 powers off, the coil-end of second source state-detection relay KA2 obtain it is electric so that first
The normally opened contact of power state detection relay KA1 disconnects, the normally-closed contact closure of the first power state detection relay KA1,
The normally opened contact of second source state-detection relay KA2 is closed, so that the coil-end of first contactor KM1 powers off, and
The coil-end of second contactor KM2 obtain it is electric, and then realize the second AC power source 2 to power load 4 power.
In embodiments of the present invention, second contactor KM2 further includes normally-closed contact, the normally-closed contact of second contactor KM2
It is connected between the normally opened contact of the first power state detection relay KA1 and the coil-end of first contactor KM1.
In above-mentioned implementation, when the coil-end of second contactor KM2 obtains electric, the normally closed touching of second contactor KM2
Point is opened, so that the coil-end of first contactor KM1 powers off, and then avoids uninterruptible power supply 3 and the second AC power source 2
It powers simultaneously to power load 4, ensure that Electrical Safety.
Specifically, first contactor KM1 further includes normally-closed contact, and the normally-closed contact of first contactor KM1 is connected on second
Between the normally opened contact of power state detection relay KA2 and the coil-end of second contactor KM2.
In above-mentioned implementation, when the coil-end of first contactor KM1 obtains electric, the normally closed touching of first contactor KM1
Point is opened, so that the coil-end of second contactor KM2 powers off, and then avoids uninterruptible power supply 3 and the second AC power source 2
It powers simultaneously to power load 4, ensure that Electrical Safety.
By the setting of the normally-closed contact of first contactor KM1 and second contactor KM2,3 He of uninterruptible power supply is realized
Electrical interlocks between second AC power source 2 have and only that is, within the same time in uninterruptible power supply 3 and the second AC power source 2
There is one to power to power load 4.
In embodiments of the present invention, between the normally opened contact of first contactor KM1 and the normally opened contact of second contactor KM2
It is provided with mechanical interlock 5.
In above-mentioned implementation, mechanical interlock 5 can be lever, branch angle and pedestal, be provided with first on pedestal
The contact of contactor KM1 and the contact of second contactor KM2, branch angle are set on the base, and lever is installed in rotation on branch angle
On, the both ends of lever are respectively arranged with the armature of first contactor KM1 and the armature of second contactor KM2, first contactor KM1
Armature and first contactor KM1 contact it is positioned opposite constitute first contactor KM1 normally opened contact, second contactor KM2
Armature and second contactor KM2 contact it is positioned opposite, constitute second contactor KM2 normally opened contact.In first contactor
When the coil-end of KM1 and second contactor KM2 power off, lever remains parallel to the state of pedestal, at this point, first contactor
The armature of KM1 and the contact separation arrangement of first contactor KM1, the touching of the armature and second contactor KM2 of second contactor KM2
Point arranged for interval；When the coil-end of first contactor KM1 obtains electric, the armature of first contactor KM1 is with first contactor KM1's
Contact is attracted conducting, and under the action of lever, the armature of second contactor KM2 is still kept with the contact of second contactor KM2
Arranged for interval, when the coil-end of second contactor KM2 obtains electric, the touching of the armature and second contactor KM2 of second contactor KM2
Point is attracted conducting, under the action of lever, between the armature of first contactor KM1 and the contact of first contactor KM1 are still kept
Every arrangement.That is, realizing the mechanical mutual between uninterruptible power supply 3 and the second AC power source 2 by mechanical interlock 5
Lock, i.e., within the same time, one and only one in uninterruptible power supply 3 and the second AC power source 2 is powered to power load 4
Optionally, the first AC power source 1 is 380V alternating current.
Specifically, the coil-end of first contactor KM1 be 380V AC coil, so as to preferably with the first alternating current
Source 1 matches.
Optionally, the second AC power source 2 is 380V alternating current.
Specifically, the coil-end of second contactor KM2 be 380V AC coil, so as to preferably with the second alternating current
Source 2 matches.
In the present embodiment, the output end of uninterruptible power supply includes U1Binding post, V1Binding post, W1Binding post, power load
Input terminal include three-phase terminal, U1Binding post, V1Binding post, W1Binding post is electric with the three-phase terminal of power load respectively
The normally opened contact of connection, the coil-end of first contactor and the first power state detection relay is cascaded and and V1Wiring
Column and W1Binding post forming circuit, so as to simplify the circuit design of power supply system.
In the present embodiment, the output end of the second AC power source includes U2Binding post, V2Binding post, W2Binding post, electricity consumption are negative
The input terminal of load includes three-phase terminal, U2Binding post, V2Binding post, W2Binding post respectively with the three-phase terminal of power load
Electrical connection, the normally opened contact series connection of the normally-closed contact and second source state-detection relay of the first power state detection relay
Together and and V2Binding post and W2Binding post forming circuit, so as to further simplify the circuit design of power supply system.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of power supply system, which is characterized in that the power supply system include the first AC power source, the second AC power source, not between
Power-off source, first contactor, second contactor, the first power state detection relay and second source state-detection relay,
First AC power source is electrically connected with the input terminal of the uninterruptible power supply, and the output end of the uninterruptible power supply and electricity consumption are negative
The input terminal of load is electrically connected, the normally opened contact of the first contactor be connected on the uninterruptible power supply output end and the use
On circuit between electric loading, the normally opened touching of the coil-end of the first contactor and the first power state detection relay
Point is cascaded and is connected in parallel on the circuit between the uninterruptible power supply and the normally opened contact of the first contactor, described
The coil-end of first power state detection relay is electrically connected with the uninterruptible power supply；
The output end of second AC power source is electrically connected with the input terminal of the power load, the second contactor it is normally opened
Contact series are on the circuit between second AC power source and the input terminal of the power load, the second contactor
Coil-end, the normally-closed contact of the first power state detection relay and the second source state-detection relay it is normally opened
Contact series are together and and the circuit that is connected between second AC power source and the normally opened contact of the second contactor
On.
2. power supply system according to claim 1, which is characterized in that the second contactor further includes normally-closed contact, institute
The normally-closed contact for stating second contactor is connected on the normally opened contact of the first power state detection relay and described first and connects
Between the coil-end of tentaculum.
3. power supply system according to claim 1, which is characterized in that the first contactor further includes normally-closed contact, institute
The normally-closed contact for stating first contactor is connected on the normally opened contact of the second source state-detection relay and described second and connects
Between the coil-end of tentaculum.
4. power supply system according to claim 1, which is characterized in that the normally opened contact of the first contactor and described
Mechanical interlock is provided between the normally opened contact of two contactors.
5. power supply system according to claim 1, which is characterized in that first AC power source is 380V alternating current.
6. power supply system according to claim 5, which is characterized in that the coil-end of the first contactor is 380V exchange
Coil.
7. power supply system according to claim 1, which is characterized in that second AC power source is 380V alternating current.
8. power supply system according to claim 7, which is characterized in that the coil-end of the second contactor is 380V exchange
Coil.
9. power supply system according to claim 1, which is characterized in that the output end of the uninterruptible power supply includes U1Wiring
Column, V1Binding post, W1Binding post, the input terminal of the power load include three-phase terminal, the U1Binding post, the V1It connects
Terminal, the W1Binding post is electrically connected with the three-phase terminal of the power load respectively, the coil-end of the first contactor
Be cascaded with the normally opened contact of the first power state detection relay and with the V1Binding post and the W1Binding post
Forming circuit.
10. power supply system according to claim 1, which is characterized in that the output end of second AC power source includes U2It connects
Terminal, V2Binding post, W2Binding post, the input terminal of the power load include three-phase terminal, the U2Binding post, the V2
Binding post, the W2Binding post is electrically connected with the three-phase terminal of the power load respectively, first power state detection
The normally opened contact of the normally-closed contact of relay and the second source state-detection relay be cascaded and with the V2It connects
Terminal and the W2Binding post forming circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810987388.7A CN109167427B (en) | 2018-08-28 | 2018-08-28 | Power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810987388.7A CN109167427B (en) | 2018-08-28 | 2018-08-28 | Power supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109167427A true CN109167427A (en) | 2019-01-08 |
| CN109167427B CN109167427B (en) | 2020-12-08 |
Family
ID=64893071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810987388.7A Active CN109167427B (en) | 2018-08-28 | 2018-08-28 | Power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109167427B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586292A (en) * | 2019-01-31 | 2019-04-05 | 中车株洲电力机车有限公司 | A kind of library power supply protection system |
| CN110247472A (en) * | 2019-07-17 | 2019-09-17 | 珠海格力电器股份有限公司 | Power supply unit, method and its equipment |
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| CN204794328U (en) * | 2015-04-28 | 2015-11-18 | 中国华电工程(集团)有限公司 | Three -phase electricity dual supply automatic switching control equipment |
| CN106059053A (en) * | 2016-05-31 | 2016-10-26 | 广州地铁集团有限公司 | Double-power-supply automatic switching device |
| CN106340953A (en) * | 2016-09-30 | 2017-01-18 | 上海华虹宏力半导体制造有限公司 | Dual-supply automatic transfer switch |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2003128338A (en) * | 2002-09-13 | 2005-04-10 | Максим Станиславович Лысенко (UA) Лысенко Максим Станиславович (UA) | EMERGENCY START-UP DEVICE (ABP) WITH ELECTROMECHANICAL LOCKING |
| CN101551057A (en) * | 2008-04-02 | 2009-10-07 | 中国航天科技集团公司长征机械厂 | Mechanical attached safety protector for hydraulic compressor |
| CN103414241A (en) * | 2013-08-21 | 2013-11-27 | 山西汾西机电有限公司 | Automatic switching power supply circuit used in underground coal mine |
| CN204794328U (en) * | 2015-04-28 | 2015-11-18 | 中国华电工程(集团)有限公司 | Three -phase electricity dual supply automatic switching control equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586292A (en) * | 2019-01-31 | 2019-04-05 | 中车株洲电力机车有限公司 | A kind of library power supply protection system |
| CN110247472A (en) * | 2019-07-17 | 2019-09-17 | 珠海格力电器股份有限公司 | Power supply unit, method and its equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109167427B (en) | 2020-12-08 |
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