CN210640729U - Three-power-supply automatic switching control loop - Google Patents
Three-power-supply automatic switching control loop Download PDFInfo
- Publication number
- CN210640729U CN210640729U CN201721421849.1U CN201721421849U CN210640729U CN 210640729 U CN210640729 U CN 210640729U CN 201721421849 U CN201721421849 U CN 201721421849U CN 210640729 U CN210640729 U CN 210640729U
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- circuit
- power supply
- fuse
- over switch
- contactor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model provides a three power automatic switch-over control circuit, include: equipment circuit, main power supply circuit, stand-by power supply circuit, emergency power supply circuit, the equipment circuit is connected in main power supply circuit, stand-by power supply circuit through dual power change over switch, be equipped with first return circuit contactor KM1 between dual power change over switch and the equipment circuit, the equipment circuit passes through circuit breaker QF3 and connects in emergency power supply circuit, be equipped with second return circuit contactor KM2 between circuit breaker QF3 and the equipment circuit, be connected with third fuse 3FU on the emergency power supply circuit, third fuse 3FU one side is equipped with third live relay KA3, third pilot lamp HD3, third live relay KA3 and third pilot lamp HD3 parallelly connected back and third fuse 3FU series connection. The utility model discloses the wiring is simple understandable, and economic safe and reliable need not install generating line and inlet wire monitoring PT, does not receive the on-the-spot DCS control system restriction that has or not, but wide application in industry and various civilian occasions.
Description
Technical Field
The utility model relates to a power automatic switch-over control circuit technical field specifically is a three power automatic switch-over control circuit.
Background
With the development of industry, people have higher and higher requirements on power supply reliability, and according to the nature of a load, reliable switching between two or more power supplies is needed in many occasions to ensure the continuity of power supply. When one power supply is abnormal, the standby power supply or the emergency power supply needs to be reliably and automatically switched according to the specified requirements.
In the current engineering construction, the automatic switching application of a dual-power system is more, and the technical level and the application of a dual-power automatic switching switch tend to be mature. However, the three-power system is not applied to many electrical systems, and with the development of industry, according to the nature and importance of the load, in some occasions, an automatic switching system of the three power sources is needed. At present, the practical application adopts double-set dual-power automatic transfer switches, the equipment investment cost is high, the occupied space is large, manual operation cannot be carried out, and the practical application is inconvenient. In addition, with the continuous improvement and perfection of the functions of the DCS control system, the automatic switching of the three power supplies is realized by using the DCS to perform logic programming in some places, and the method is simple in wiring and complex in logic programming and is only suitable for large-scale factories with DCS centralized control.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a three power automatic switch-over control circuit to solve the problem that proposes in the above-mentioned background art.
The utility model provides a technical problem adopt following technical scheme to realize: a three power source automatic switching control loop comprising: equipment circuit, mainly use power supply circuit, stand-by power supply circuit, emergency power supply circuit, its characterized in that: the device circuit is connected with a main power supply circuit and a standby power supply circuit through a dual power supply change-over switch, a first loop contactor KM1 is arranged between the dual power supply change-over switch and the device circuit, the device circuit is connected with an emergency power supply circuit through a breaker QF3, a second loop contactor KM2 is arranged between the breaker QF3 and the device circuit, the main power supply circuit is connected with a first fuse 1FU, one side of the first fuse 1FU is provided with a first electrified relay KA1 and a first indicator light HD1, the first electrified relay KA1 is connected with the first indicator light HD1 in parallel and then connected with the first fuse 1FU in series, the standby power supply circuit is connected with a second fuse 2FU, one side of the second fuse 2FU is provided with a second electrified relay KA2 and a second indicator light KA2, the second electrified relay 2 is connected with the second indicator light HD2 in parallel and then connected with the second fuse 2FU in series, be connected with third fuse 3FU on the emergency power supply circuit, 3FU one side of third fuse is equipped with third electrified relay KA3, third pilot lamp HD3, third electrified relay KA3 and third pilot lamp HD3 are parallelly connected the back and are connected with third fuse 3FU series connection.
A change-over switch XZK is arranged between the dual-power-supply change-over switch and the first loop contactor KM1, the change-over switch XZK is connected between the dual-power-supply change-over switch and the first loop contactor KM1 through a fourth fuse 4FU, a first electrified relay KA1, a second electrified relay KA2, a first current transformer 1TA, a first automatic switch 1QA and a first loop contactor KM1 are connected on the change-over switch XZK, the first electrified relay KA1, the second electrified relay KA2, the first automatic switch 1QA and the first loop contactor KM1 are connected in parallel and then connected in series with the first loop contactor KM1 and the second loop contactor KM2, and a first loop contactor KM1 and a fourth indicator lamp HD4 are connected in parallel on the change-over switch XZK.
A change-over switch XZK is arranged between the breaker QF3 and the second loop contactor KM2, the change-over switch XZK is connected between the breaker QF3 and the second loop contactor KM2 through a fifth fuse 5FU, the change-over switch XZK is connected with a first electrified relay KA1, a second electrified relay KA2, a third electrified relay KA3, a second current transformer 2TA, a second automatic switch 2QA and a second loop contactor KM2, the first electrified relay KA1, the second electrified relay KA2, the third electrified relay KA3, the second automatic switch 2QA and the second loop contactor KM2 are connected in parallel and then connected in series with the first loop contactor KM1 and the second loop contactor KM2, and the change-over switch XZK is connected in parallel with the second loop contactor KM2 and a fifth indicator lamp HD 5.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the wiring is simple understandable, and economic safe and reliable need not install generating line and inlet wire monitoring PT, does not receive the on-the-spot DCS control system restriction that has or not, but wide application in industry and various civilian occasions.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the specific drawings.
As shown in fig. 1, a three-power automatic switching control loop includes: the device circuit is connected with the main power supply circuit and the standby power supply circuit through a dual-power-supply change-over switch, a first loop contactor KM1 is arranged between the dual-power-supply change-over switch and the device circuit, the device circuit is connected with the emergency power supply circuit through a breaker QF3, a second loop contactor KM2 is arranged between the breaker QF3 and the device circuit, the main power supply circuit is connected with a first fuse 1FU, a first live relay KA1 and a first indicator lamp HD1 are arranged on one side of the first fuse 1FU, the first live relay KA1 is connected with the first indicator lamp HD1 in series after being connected in parallel and then is connected with the first fuse 1FU in series, a second fuse 2FU is connected onto the standby power supply circuit, and a second live relay 2 is arranged on one side of the second fuse 2FU, Second pilot lamp HD2, parallelly connected back and the 2FU series connection of second fuse of second electrified relay KA2 and second pilot lamp HD2, be connected with third fuse 3FU on the emergency power supply circuit, third fuse 3FU one side is equipped with third electrified relay KA3, third pilot lamp HD3, third electrified relay KA3 and the parallelly connected back of third pilot lamp HD3 and third fuse 3FU series connection.
A change-over switch XZK is arranged between the dual-power-supply change-over switch and the first loop contactor KM1, the change-over switch XZK is connected between the dual-power-supply change-over switch and the first loop contactor KM1 through a fourth fuse 4FU, a first electrified relay KA1, a second electrified relay KA2, a first current transformer 1TA, a first automatic switch 1QA and a first loop contactor KM1 are connected on the change-over switch XZK, the first electrified relay KA1, the second electrified relay KA2, the first automatic switch 1QA and the first loop contactor KM1 are connected in parallel and then connected in series with the first loop contactor KM1 and the second loop contactor KM2, and a first loop contactor KM1 and a fourth indicator lamp HD4 are connected in parallel on the change-over switch XZK.
A change-over switch XZK is arranged between the breaker QF3 and the second loop contactor KM2, the change-over switch XZK is connected between the breaker QF3 and the second loop contactor KM2 through a fifth fuse 5FU, the change-over switch XZK is connected with a first electrified relay KA1, a second electrified relay KA2, a third electrified relay KA3, a second current transformer 2TA, a second automatic switch 2QA and a second loop contactor KM2, the first electrified relay KA1, the second electrified relay KA2, the third electrified relay KA3, the second automatic switch 2QA and the second loop contactor KM2 are connected in parallel and then connected in series with the first loop contactor KM1 and the second loop contactor KM2, and the change-over switch XZK is connected in parallel with the second loop contactor KM2 and a fifth indicator lamp HD 5.
The electric appliance elements mainly used by the utility model are easy to replace and replace, and are convenient for the work of daily fault treatment, daily maintenance and the like; the automatic switching and recovery of the main power supply and the standby power supply adopt a dual-power automatic transfer switch with mature technology, and are safe and reliable; the emergency power supply loop is provided with a breaker which is in a closing state for a long time. The interlocking contactor is arranged at the lower port of the emergency power circuit breaker after the double power switches of the main power supply and the standby power supply are switched, when the main power supply and the standby power supply are failed at the same time, the first electrified relay KA1 and the second electrified relay KA2 of the main power circuit are all powered off, the third electrified relay KA3 of the emergency power circuit is in a powered-on state, and passes through the automatic position contact of the change-over switch XZK and the locking contact of the first circuit contactor KM1 after the double power switches, at the moment, the second circuit contactor KM2 of the emergency power circuit is switched on, and the automatic switching of the emergency power supply is completed. When any one circuit of the main power supply and the standby power supply recovers power supply, the emergency power supply is automatically cut off through the electrified indicating relay, and the power supply of the main power supply or the standby power supply is recovered.
The switching between the main power supply and the emergency power supply can be completed through manual operation of a manual position contact and a local opening and closing button of the change-over switch XZK. The mechanical locking between the main power supply and the standby power supply is realized by a double-power-supply change-over switch, and the mechanical locking between the main power supply and the standby power supply and the emergency power supply is realized by an interlocking contactor. The mechanical locking between the three power supplies is realized safely and reliably.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A three power source automatic switching control loop comprising: equipment circuit, mainly use power supply circuit, stand-by power supply circuit, emergency power supply circuit, its characterized in that: the utility model discloses a fuse protector, including equipment circuit, dual supply change over switch, main power supply circuit, stand-by power supply circuit, be equipped with first return circuit contactor (KM1) between dual supply change over switch and the equipment circuit, the equipment circuit passes through circuit breaker (QF3) and connects in emergency power supply circuit, be equipped with second return circuit contactor (KM2) between circuit breaker (QF3) and the equipment circuit, be connected with first fuse (1FU) on the main power supply circuit, first fuse (1FU) one side is equipped with first electrified relay (KA1), first pilot lamp (HD1), first electrified relay (KA1) and first pilot lamp (HD1) parallelly connected back and first fuse (1FU) series connection, be connected with second fuse (2FU) on the stand-by power supply circuit, second fuse (2FU) one side is equipped with second electrified relay (KA2), Second pilot lamp (HD2), parallelly connected back and second fuse (2FU) series connection of second electrified relay (KA2) and second pilot lamp (HD2), be connected with third fuse (3FU) on the emergency power supply circuit, third fuse (3FU) one side is equipped with third electrified relay (KA3), third pilot lamp (HD3), parallelly connected back and third fuse (3FU) series connection of third electrified relay (KA3) and third pilot lamp (HD 3).
2. The automatic switching control loop of claim 1, wherein: be equipped with change over switch (XZK) between dual supply change over switch and first return circuit contactor (KM1), change over switch (XZK) is connected to between dual supply change over switch and first return circuit contactor (KM1) through fourth fuse (4FU), change over switch (XZK) is last to be connected with first electrified relay (KA1), second electrified relay (KA2), first current transformer (1TA), first automatic switch (1QA), first return circuit contactor (KM1), first electrified relay (KA1), second electrified relay (KA2) and first automatic switch (1QA), first return circuit contactor (KM1) are established ties in first return circuit contactor (KM1), second return circuit contactor (KM2) after connecting in parallel, change over switch (XZK) is last to connect in parallel to be equipped with first return circuit contactor (KM1), fourth pilot lamp (HD 4).
3. The automatic switching control loop of claim 1, wherein: be equipped with change over switch (XZK) between circuit breaker (QF3) and second return circuit contactor (KM2), change over switch (XZK) is connected to between circuit breaker (QF3) and second return circuit contactor (KM2) through fifth fuse (5FU), change over switch (XZK) is last to be connected with first electrified relay (KA1), second electrified relay (KA2), third electrified relay (KA3), second current transformer (2TA), second automatic switch (2QA), second return circuit contactor (KM2), first electrified relay (KA1), second electrified relay (KA2), third electrified relay (KA3) and second automatic switch (2QA), second return circuit contactor (KM2) are parallelly connected the back and establish ties in first return circuit contactor (KM1), second return circuit contactor (KM2), change over switch (XZK) is last to be equipped with second return circuit contactor (KM) 2 in parallel, And a fifth indicator light (HD 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721421849.1U CN210640729U (en) | 2017-10-30 | 2017-10-30 | Three-power-supply automatic switching control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721421849.1U CN210640729U (en) | 2017-10-30 | 2017-10-30 | Three-power-supply automatic switching control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210640729U true CN210640729U (en) | 2020-05-29 |
Family
ID=70794054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721421849.1U Expired - Fee Related CN210640729U (en) | 2017-10-30 | 2017-10-30 | Three-power-supply automatic switching control loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210640729U (en) |
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2017
- 2017-10-30 CN CN201721421849.1U patent/CN210640729U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200529 Termination date: 20211030 |