CN2498775Y - Phase-off protector for power supply of multiple pump sets frequency varying water supplier - Google Patents
Phase-off protector for power supply of multiple pump sets frequency varying water supplier Download PDFInfo
- Publication number
- CN2498775Y CN2498775Y CN 01261423 CN01261423U CN2498775Y CN 2498775 Y CN2498775 Y CN 2498775Y CN 01261423 CN01261423 CN 01261423 CN 01261423 U CN01261423 U CN 01261423U CN 2498775 Y CN2498775 Y CN 2498775Y
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- China
- Prior art keywords
- phase
- power supply
- type flip
- flip flop
- output
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- Expired - Fee Related
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model relates to a phase deficient or phase fault protector for the power applied in the multi-pump variable-frequency water supply equipment. The utility model consists of three limit shapers which are connected with three phases of the power supply respectively. A trigger D of phase A is connected with a limit shaper of phase A and a trigger D of phase B is connected with a limit shaper of phase B. The reset ends of the triggers D of phase A and phase B is connected with a limit shaper of phase C. The output end of the trigger D of phase A is connected with the triggering end of the trigger D of phase B. The load that is an amplifier of a relay is connected with the output of the trigger D of phase B. The coiling of the main alternating current contactor in the controlling cabinet is connected with the normally open contactor of the relay in series and then is connected between one phase of power supply and the zero line. When the phase deficient or phase fault occurs in the power supply, the phase deficient or phase fault protector for the power applied in the multi-pump variable-frequency water supply equipment will not supply the power to the variable-frequency pump and the general frequency pump, thereby avoiding the damage to the pump, and the working life of the pump is prolonged.
Description
Technical field
The utility model relates to the power supply phase shortage or the fault-phase protection device of many pumps group frequency-changing water supply device.
Background technology
In the installing and using of supply equipment, three characteristics of the middle term power supply lacks misphase and causes the accident of burning motor, damage equipment of common occurrence, the minority frequency-changing water supply device, since frequency converter input module type difference, still operation after the phase shortage, and long frequency conversion input module will explode the time one, bring about great losses, as for misphase,, can forbid that parameter solves by presetting counter-rotating for single pump group frequency-changing water supply device.But just be difficult to solve for the supply equipment of many pumps group circulation frequency conversion, this is that microcomputer is then controlled another pump variable frequency and moved because when the water pump of converting operation reaches maximum (top) speed and still can not meet the demands, this water pump will be transformed into the power frequency constant-speed operation.When above, whenever variable frequency pump reaches maximum (top) speed, all will take place as above to change, and new pump group putting into parallel operation will be arranged more than 2 as the pump group.The three-phase power supply phase sequence wrong is forbidden though variable frequency pump can reverse, the operation and many general pumps reverse, and its consequence, the one, cause the general pump water that do not reverse; The 2nd, general pump idle running heating, acceleration mechanical wearing and tearing, reduction of service life; The 3rd, water pump switches frequently in the pump group, and the operating mode shakiness does not reach the purpose of constant pressure water supply.
Summary of the invention
The purpose of this utility model provides a kind of phase-off protector for power supply of many pumps group frequency-changing water supply device that can both be protected to variable frequency pump and general pump when phase shortage or misphase appear in three phase mains.
The phase-off protector for power supply of this many pumps group frequency-changing water supply device; comprise respectively with the three phase supply power supply in wherein three amplitude limit reshapers that are connected; the output of the amplitude limit reshaper that is connected with A and the A clock end of d type flip flop mutually are connected; the output of the amplitude limit reshaper that is connected with B and the B clock end of d type flip flop mutually are connected; the trigger end of A phase d type flip flop is connected with DC power supply; output and the B trigger end connection of d type flip flop mutually; be in series with differential circuit and buffer circuit on the output of the amplitude limit reshaper that is connected with C; the output of buffer circuit and the A reset terminal of d type flip flop and the reset terminal of B phase d type flip flop mutually are connected; be connected to integrating circuit on the output of B phase d type flip flop; the output of integrating circuit is connected with amplifier; the load of this amplifier is a relay coil, is connected on wherein one in the normally opened contact of this relay and the control cubicle after the series connection of the coil of total A.C. contactor mutually between power supply and the zero line.
As improvement, be connected on wherein one after the normally-closed contact of relay and the series connection of fault display lamp mutually between power supply and the zero line to the phase-off protector for power supply of many pumps group frequency-changing water supply device.
The operation principle of the phase-off protector for power supply of this many pumps group frequency-changing water supply device is: in the one-period of alternating current; the three-phase alternating current power supply is by after the amplitude limit reshaper shaping separately; form a; b; c three road reshaping signals; a road signal wherein arrives the clock end of A phase d type flip flop earlier; because the trigger end of A phase d type flip flop is connected with DC power supply; therefore the output of A phase d type flip flop is just exported the trigger end that high level is given B phase d type flip flop; when b road signal arrives the clock end of B phase d type flip flop; the output of B phase d type flip flop is just exported high level; this high level is behind integrating circuit; make amplifier continue to be conducting to next cycle; the amplifier conducting; there is electric current to flow through in the relay coil as load; the normally-closed contact of this relay disconnects; disengagement failure display lamp path; the fault display lamp does not work; simultaneously; the normally opened contact adhesive of this relay; connect the wire loop of total A.C. contactor in the control cubicle; total A.C. contactor is connected the power supply of many pumps group frequency-changing water supply device, until the next cycle of alternating current.In the one-period of alternating current, last c road signal produces positive and negative pointed peaky pulse through differential circuit, because the isolation of buffer circuit, only allows positive pointed peaky pulse to remove A phase d type flip flop and the B reset terminal of d type flip flop mutually, these two d type flip flops are resetted, wait for the arrival of next cycle.If the phase sequence that the three-phase alternating current power supply connects not to or the communication power supply phase shortage, the output of B phase d type flip flop just can not exported high level, amplifier is not worked, the not adhesive of normally opened contact of relay, the wire loop of total A.C. contactor disconnects in the control cubicle, the not adhesive of contact of total A.C. contactor, many pumps group frequency-changing water supply device can not worked because of there being electricity, the normally-closed contact of relay does not disconnect, and the fault display lamp is bright, reminds operating personnel to fix a breakdown.
From the above mentioned, adopt the phase-off protector for power supply of this many pumps group frequency-changing water supply device, when in a single day misphase or phase shortage appearred in three-phase alternating-current supply, just not variable frequency pump in supply equipment and general pump power supply avoided making it to be damaged, and has prolonged useful life.
Description of drawings
Accompanying drawing shows the circuit structure schematic diagram of the phase-off protector for power supply embodiment of this many pumps group frequency-changing water supply device.
Embodiment
With reference to accompanying drawing; in the present embodiment; the phase-off protector for power supply of many pumps group frequency-changing water supply device; comprise power supply connection mutually with A; the amplitude limit reshaper 1 that constitutes by resistance R A and voltage-stabiliser tube DA; with B power supply connection mutually; the amplitude limit reshaper 2 that constitutes by resistance R B and voltage-stabiliser tube DB; with C power supply connection mutually; the amplitude limit reshaper 3 that constitutes by resistance R C and voltage-stabiliser tube DC; the output of amplitude limit reshaper 1 and the A clock end connection of d type flip flop 4 mutually; the output of amplitude limit reshaper 2 and the B clock end connection of d type flip flop 5 mutually; the trigger end of A phase d type flip flop 4 is connected with+12V power supply; output and the B trigger end connection of d type flip flop 5 mutually are in series with by capacitor C on the output of amplitude limit reshaper 3
1, resistance R
1The differential circuit 6 that constitutes and by diode D
1, resistance R
2The buffer circuit 7 that constitutes, the output of buffer circuit 7 and the A reset terminal of d type flip flop 4 and the reset terminal of B phase d type flip flop 5 mutually are connected, and are connected to by resistance R on the output of B phase d type flip flop 5
3, capacitor C
2The integrating circuit 8 that constitutes, the output of integrating circuit 8 is connected with the amplifier 9 that is made of compound transistor T, the load of amplifier 9 is relay coil J, be connected on B in the normally opened contact J-1 of this relay and the control cubicle after coil 10 series connection of total A.C. contactor mutually between power supply and the zero line, the normally opened contact J-2 of relay be connected on C after the fault display lamp is connected mutually between power supply and the zero line.
In the present embodiment, A phase d type flip flop 4 and B d type flip flop 5 shared integrated circuit (IC) chip CD4013 mutually.
Claims (2)
1; a kind of phase-off protector for power supply of many pumps group frequency-changing water supply device; it is characterized in that comprising respectively with the three phase supply power supply in wherein three the amplitude limit reshapers (1) that are connected; (2); (3); the output of the amplitude limit reshaper (1) that is connected with A and the A clock end of d type flip flop (4) mutually are connected; the output of the amplitude limit reshaper (2) that is connected with B and the B clock end of d type flip flop (5) mutually are connected; the trigger end of A phase d type flip flop (4) is connected with DC power supply; output and the B trigger end connection of d type flip flop (5) mutually; be in series with differential circuit (6) and buffer circuit (7) on the output of the amplitude limit reshaper (3) that is connected with C; the output of buffer circuit (7) and the A reset terminal of d type flip flop (4) and the reset terminal of B phase d type flip flop (5) mutually are connected; be connected to integrating circuit (8) on the output of B phase d type flip flop (5); the output of integrating circuit (8) is connected with amplifier (9); the load of this amplifier (9) is a relay coil (7), is connected on wherein one in the normally opened contact of this relay (J-1) and the control cubicle after the series connection of the coil (10) of total A.C. contactor mutually between power supply and the zero line.
2, be connected on wherein one behind the phase-off protector for power supply of many pumps group frequency-changing water supply device according to claim 1, the normally-closed contact (J-2) that it is characterized in that relay and fault display lamp (11) series connection mutually between power supply and the zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01261423 CN2498775Y (en) | 2001-09-03 | 2001-09-03 | Phase-off protector for power supply of multiple pump sets frequency varying water supplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01261423 CN2498775Y (en) | 2001-09-03 | 2001-09-03 | Phase-off protector for power supply of multiple pump sets frequency varying water supplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2498775Y true CN2498775Y (en) | 2002-07-03 |
Family
ID=33669367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01261423 Expired - Fee Related CN2498775Y (en) | 2001-09-03 | 2001-09-03 | Phase-off protector for power supply of multiple pump sets frequency varying water supplier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2498775Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739085A (en) * | 2012-06-20 | 2012-10-17 | 陕西煤业化工技术研究院有限责任公司 | Inverter phase sequence detection phase locking device and phase locking and phase sequence identifying method |
| CN105762784A (en) * | 2016-04-14 | 2016-07-13 | 成都法姆科技有限公司 | Default-phase protection circuit used for three-phase alternating current power supply and method thereof |
-
2001
- 2001-09-03 CN CN 01261423 patent/CN2498775Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739085A (en) * | 2012-06-20 | 2012-10-17 | 陕西煤业化工技术研究院有限责任公司 | Inverter phase sequence detection phase locking device and phase locking and phase sequence identifying method |
| CN102739085B (en) * | 2012-06-20 | 2014-07-02 | 陕西煤业化工技术研究院有限责任公司 | Inverter phase sequence detection phase locking device and phase locking and phase sequence identifying method |
| CN105762784A (en) * | 2016-04-14 | 2016-07-13 | 成都法姆科技有限公司 | Default-phase protection circuit used for three-phase alternating current power supply and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |