CN204456298U - The secondary water-supply apparatus control system of automatic identification forward and backward function - Google Patents
The secondary water-supply apparatus control system of automatic identification forward and backward function Download PDFInfo
- Publication number
- CN204456298U CN204456298U CN201420860988.4U CN201420860988U CN204456298U CN 204456298 U CN204456298 U CN 204456298U CN 201420860988 U CN201420860988 U CN 201420860988U CN 204456298 U CN204456298 U CN 204456298U
- Authority
- CN
- China
- Prior art keywords
- phase sequence
- contactor
- secondary water
- supply
- control system
- 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.)
- Active
Links
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Landscapes
- Control Of Multiple Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses the secondary water-supply apparatus control system automatically identifying forward and backward function, access the first A.C. contactor, the second A.C. contactor, phase sequence protective relay in power supply loop, the first A.C. contactor positive phase sequence is in parallel with second A.C. contactor negative-phase sequence; In parallel with phase sequence protective relay after the first described A.C. contactor, the second A.C. contactor parallel connection.The warning contact of phase sequence protective relay enters PLC central controller.The technical program only increases a phase sequence protective relay and two A.C. contactors in circuit loop; ensureing the auto-conversion function achieving phase sequence while secondary water-supply equipment normally runs; thus ensure that secondary water-supply pump motor rotates forward forever; namely the automatic identification function of the forward and backward of secondary water-supply pump motor is achieved; avoid the phenomenon burnt out because of supply-water pump motor reversal; ensure that the normal continuously of secondary water-supply equipment runs, this Control system architecture is simple, economical and practical.
Description
Technical field
The technical program relates to the control system being applied to supply equipment, and precisely one can realize power phase and automatically changes, the control system that assure feed water equipment pump rotates forward forever.
Background technology
Secondary water-supply alleged by usual people, refer to that city public water supply or self-built facility supply water through storing by unit or individual, pressurization, supply user or personal form again by pipeline, therefore, secondary water-supply is the unique selection mode of high-floor feedwater.Whether secondary water-supply facility is directly connected to secondary water-supply water quality, hydraulic pressure and water supply security by the quality of regulation construction, design and construction, closely related with the life of people's normal table.
Secondary water-supply equipment is mainly and compensates municipal water supply line pressure and lack, assure reside abroad or in a place away from one's hometown, livelihood sets up at high-rise crowd's water.More former water supplies water, and the water quality of secondary water-supply is more easily contaminated, and the safety and reliability one of secondary water-supply is extensively paid attention to being all subject to civic.In every case should build the construction project of secondary water-supply non-tower water feeder, secondary water-supply equipment is necessary independent setting backward, and engineering is necessary to design with major project simultaneously, constructs simultaneously, is delivered for use simultaneously.
At present, known secondary water-supply control system is connected by line breaker, A.C. contactor, thermal relay, frequency converter, pressure sensor, PLC central processing unit and button indicating lamp etc. to combine.After power circuit breaker is connected, PLC central controller is by the difference of the pressure set points in computing system and pressure sensor actual measured value, then automatically output signal to frequency converter and adjust its frequency, thus supply-water pump motor speed is changed with the Differential Output of assure feed water pressure.
Above-mentioned secondary water-supply control system can not identify the rotating of supply-water pump motor automatically, can only adjust phase sequence, then immobilize according to the artificial judgement of debugging and maintenance personal.Be easy to that phase sequence is changed when recovering after the change of power supply generation phase sequence or corrective maintenance and form negative-phase sequence, thus cause supply-water pump motor reversal, running time, slightly namely length caused supply-water pump motor to burn out, thus affect the normal operation of secondary water-supply equipment.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of simple circuit, alternating current generator power phase auto-conversion function that cost is low, ensures that secondary water-supply equipment pump rotates forward forever.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
The secondary water-supply apparatus control system of automatic identification forward and backward function, accesses the first A.C. contactor, the second A.C. contactor, phase sequence protective relay in power supply loop, the first A.C. contactor positive phase sequence is in parallel with second A.C. contactor negative-phase sequence; In parallel with phase sequence protective relay after the first described A.C. contactor, the second A.C. contactor parallel connection.
As the further improvement to the technical program, the warning contact of described phase sequence protective relay enters PLC central controller.
The beneficial effect of the technical program is: only increase a phase sequence protective relay and two A.C. contactors; ensureing the auto-conversion function achieving phase sequence while secondary water-supply equipment normally runs; collateral security secondary water-supply pump motor rotates forward forever; namely the automatic identification function of the forward and backward of secondary water-supply pump motor is achieved; avoid the phenomenon burnt out because of supply-water pump motor reversal; ensure that the normal continuously of secondary water-supply equipment runs, this Control system architecture is simple, economical and practical.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present utility model.
Fig. 2 is the element connection diagram of a kind of detailed description of the invention of the utility model.
Description of reference numerals: 1-line breaker; 2-first A.C. contactor; 3-phase sequence protective relay; 4-second A.C. contactor; 5-frequency converter; 6-pump motor.
Detailed description of the invention
Connection with figures is described in further detail the utility model below.
Fig. 2 is known for index map 1; The secondary water-supply apparatus control system of the automatic identification forward and backward function of the technical program, access the first A.C. contactor 2, second A.C. contactor 4 in power supply loop, phase sequence protective relay 3, first A.C. contactor 2 positive phase sequence is in parallel with second A.C. contactor 4 negative-phase sequence; It is in parallel with phase sequence protective relay 3 after the first described A.C. contactor 2, second A.C. contactor 4 is in parallel.The warning contact of described phase sequence protective relay 3 enters PLC central controller.Also be provided with line breaker 1 in foregoing circuit, protection is carried out to power circuit and motor etc., can automatic shutdown circuit when serious overload or short circuit and the fault such as under-voltage occur for they.Control pump motor 6 by foregoing circuit connection PLC control frequency converter 5 to realize automatically identifying forward and backward function, keep forever rotating forward, prevent from burning out pump motor 6.
The control system course of work of the technical program and principle as follows:
1, the forward direction of phase sequence and supply-water pump motor 6 is set when first time energising;
2, when second time or the N time energising, if phase sequence is with identical before, namely phase sequence protective relay 3 can not send alarm signal, PLC central controller is defaulted as positive phase sequence when not receiving the alarm signal that phase sequence protective relay 3 sends, and send output signal simultaneously and make the first A.C. contactor 2 adhesive, by power delivery to the power end of frequency converter 5; If phase sequence is from different before; namely phase sequence protective relay 3 can send alarm signal; PLC central controller sends output signal and makes the second A.C. contactor 4 adhesive when receiving the alarm signal that phase sequence protective relay 3 sends; thus negative-phase sequence is converted to the power end that positive phase sequence delivers to frequency converter 5, namely assure feed water pump motor 6 rotates forward.
Claims (4)
1. automatically identify the secondary water-supply apparatus control system of forward and backward function, it is characterized in that:
Access the first A.C. contactor, the second A.C. contactor, phase sequence protective relay in power supply loop, the first A.C. contactor positive phase sequence is in parallel with second A.C. contactor negative-phase sequence; In parallel with phase sequence protective relay after the first described A.C. contactor, the second A.C. contactor parallel connection.
2. the secondary water-supply apparatus control system of automatic identification forward and backward function according to claim 1, is characterized in that: the warning contact of described phase sequence protective relay enters PLC central controller.
3. the secondary water-supply apparatus control system of automatic identification forward and backward function according to claim 2, is characterized in that: pump motor connects frequency converter, and the duty of pump motor is adjusted by frequency converter.
4. the secondary water-supply apparatus control system of automatic identification forward and backward function according to claim 3, is characterized in that: be also connected with line breaker in described power supply loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860988.4U CN204456298U (en) | 2014-12-31 | 2014-12-31 | The secondary water-supply apparatus control system of automatic identification forward and backward function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860988.4U CN204456298U (en) | 2014-12-31 | 2014-12-31 | The secondary water-supply apparatus control system of automatic identification forward and backward function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204456298U true CN204456298U (en) | 2015-07-08 |
Family
ID=53663206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420860988.4U Active CN204456298U (en) | 2014-12-31 | 2014-12-31 | The secondary water-supply apparatus control system of automatic identification forward and backward function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204456298U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119373A (en) * | 2017-12-19 | 2018-06-05 | 深圳市英威腾电气股份有限公司 | A kind of frequency converter automatic test approach and frequency converter for water pump |
-
2014
- 2014-12-31 CN CN201420860988.4U patent/CN204456298U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119373A (en) * | 2017-12-19 | 2018-06-05 | 深圳市英威腾电气股份有限公司 | A kind of frequency converter automatic test approach and frequency converter for water pump |
| CN108119373B (en) * | 2017-12-19 | 2020-01-21 | 深圳市英威腾电气股份有限公司 | Automatic testing method for frequency converter of water pump and frequency converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MY173242A (en) | Method and apparatus for preventing electricity meter failure | |
| CN104300583B (en) | A kind of meter and the microgrid control method for frequency of equipment governing response characteristic | |
| CN104348183A (en) | Power supplying system with multiple large-power high-voltage diesel generating sets in parallel operation | |
| CN204177854U (en) | Medical Devices and cut-offing alarming circuit thereof | |
| CN204456298U (en) | The secondary water-supply apparatus control system of automatic identification forward and backward function | |
| CN104865833A (en) | Household electrical appliance power supply management method and apparatus | |
| CN204316180U (en) | Dual-power automatic switching water supply equipment control system | |
| CN205160093U (en) | Thermal power plant is diesel generating set parallel machine system for emergency power supply | |
| CN204118813U (en) | Direct-current charging post main circuit dual control electric power system | |
| CN208971235U (en) | Thermal power plant and its emergency power supply system | |
| CN103437985B (en) | The controlling method of water robbed fast by a kind of electrically driven feedpump | |
| CN205303981U (en) | A intelligent power distribution cabinet equipment for electric power system | |
| CN104638663A (en) | Control method for power oscillation | |
| CN204012849U (en) | A kind of portable charger that can automatic decision electric power polarity | |
| CN205154588U (en) | Two frequency constant -voltage water supply control system | |
| CN205960997U (en) | Motor soft starter | |
| CN203891115U (en) | Water supply device with automatic pressure relief function | |
| CN203812010U (en) | Wire fracture automatic controller of steel or iron gauze braiding machine | |
| CN202788951U (en) | Control system of electric control cabinet of oil tank instrument | |
| CN106374678A (en) | Coaxial multi-power electric motor system | |
| CN207442439U (en) | A kind of direct-current micro-grid adaptive guard system based on hierarchical control | |
| CN206099650U (en) | Coaxial many power motor system | |
| CN205195094U (en) | High -low voltage power distribution cabinet | |
| CN204082323U (en) | A kind of waste gas electricity generation grid-connecting unit | |
| CN205827194U (en) | The small hydropower station active and standby changeable control system reform case of integration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |