CN104158148A - Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine - Google Patents
Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine Download PDFInfo
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- CN104158148A CN104158148A CN201410373660.4A CN201410373660A CN104158148A CN 104158148 A CN104158148 A CN 104158148A CN 201410373660 A CN201410373660 A CN 201410373660A CN 104158148 A CN104158148 A CN 104158148A
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Abstract
The utility model discloses an autocorrelation and phase failure protection device for the phase sequence of a three-phase power source for a plate type oil filter machine. The autocorrelation and phase failure protection device comprises a first contactor coil, a first contactor main contact, a first contactor normally-closed contact, a first contactor normally-open contact, a first phase sequence relay, a second contactor coil, a second contactor main contact, a second contactor normally-closed contact, a second contactor normally-open contact, a second phase sequence relay, a thermal relay, a thermal relay normally-closed node, a start button and a stop button. The autocorrelation and phase failure protection device provided by the utility model has the effects as follows: personal injury and equipment damage caused by default phase of the three-phase power source due to external force effects such as lightning strokes and the like can be avoided; personal injury and equipment damage caused by anti-phase access of the three-phase power source can be avoided; transformer oil suck-back during the starting of the oil filter machine can be avoided, and a clean oil source is ensured. The autocorrelation and phase failure protection device has an automatic trip control function in case of over high atmospheric pressure, can ensure in-time tripping and stop working in case of oil circuit blockage, and can prevent the oil circuit of the oil filter machine from being damaged by over high pressure.
Description
Technical field
The invention belongs to Repair of Transformer oil filtering unit renovation technique field, particularly relate to a kind of board-like oil filter three-phase power supply phase sequence automatic calibration and phase-lacking protective device.
Background technology
Board-like oil filter is a kind of very important equipment in main transformer service work, and because it is easy to carry, efficiency is high, is playing the part of very important role in main transformer service work always.But because range of application is little, this equipment has only utilized the function of oil pump at present, lack due automation function in some other electric equipment.When to board-like oil filter three phase mains power supply, traditional way is the correct access by trying to ensure three phase mains.
Under existing condition, it is to judge that by the electric phase modulation of examination whether phase sequence is correct that board-like oil filter connects power supply, and the uncertainty of phase sequence, the uncertainty of power supply exist problems:
1, three phase mains usually opens circuit mutually because certain in three-phase appears in thunderbolt, External Force Acting, causes phase shortage.
If 2 can not carry out open-phase protection to oil filtering unit in running, can make oil filtering unit abnormal work in disconnected phase situation, gently equipment operation is undesired, and heavy burning apparatus causes serious economic loss, can cause what is more personal injury.
3, in the process of trying, there is the possibility of three-phase anti-phase access, short, but equipment is also had to certain infringement.
4, in three-phase anti-phase situation, can cause transformer oil suck-back, pollute clean oil sources.
5, manually try, phase modulation can increase unnecessary manpower work waste, increases dangerous matter sources.
Under this present situation, the function that increases phase sequence automatic calibration and open-phase protection for board-like oil filter is imperative.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of board-like oil filter three-phase power supply phase sequence automatic calibration and phase-lacking protective device.
In order to achieve the above object, board-like oil filter three-phase power supply phase sequence automatic calibration provided by the invention and phase-lacking protective device comprise: the first contactor coil KM1, the first contactor main contacts KM1-1, the first contactor normally-closed contact KM1-2, the first contactor normally opened contact KM1-3, the first phase sequence relay XJ1, the second contactor coil KM2, the second contactor main contacts KM2-1, the second contactor normally-closed contact KM2-2, the second contactor normally opened contact KM2-3, the second phase sequence relay XJ2, thermal relay FR, the normally closed node FR-1 of thermal relay, start button SB1 and stop button SB2, wherein: first contactor coil KM1 one end is connected with zero line N by the second contactor normally-closed contact KM2-2, the other end is connected with the terminal 6 of the first phase sequence relay XJ1, second contactor coil KM2 one end is connected with zero line N by the first contactor normally-closed contact KM1-2, and the other end is connected with the terminal 5 of the second phase sequence relay XJ2, one end of start button SB1 is connected with three phase mains phase line L1 with the normally closed node FR-1 of thermal relay by stop button SB2, and the other end is connected with the terminal 8 of the first phase sequence relay XJ1 and the terminal 7 of the second phase sequence relay XJ2 simultaneously, the first contactor normally opened contact KM1-3 and the second contactor normally opened contact KM2-3 are simultaneously in parallel with start button SB1, the terminal 1,2,3 of the first phase sequence relay XJ1 is connected with 1,2,3 terminals of thermal relay FR respectively by the first contactor main contacts KM1-1, the terminal 1,3,5 of the second phase sequence relay XJ2 is connected with 1,3,5 terminals of thermal relay FR respectively by the second contactor main contacts KM2-1, 2,4,6 terminals of thermal relay coil FR are connected with terminal U, V, the W of three phase electric machine respectively, the terminal 7 of the first phase sequence relay XJ1 is connected with the terminal 6 of the second phase sequence relay XJ2, the terminal 5 of the first phase sequence relay XJ1 is connected with the terminal 8 of the second phase sequence relay XJ2, three phase mains phase line L1 is connected with the terminal 1 of the first phase sequence relay XJ1 and the terminal 1 of the second phase sequence relay XJ2 simultaneously, three phase mains phase line L2 is connected with the terminal 2 of the first phase sequence relay XJ1 and the terminal 3 of the second phase sequence relay XJ2 simultaneously, three phase mains phase line L3 is connected with the terminal 3 of the first phase sequence relay XJ1 and the terminal 2 of the second phase sequence relay XJ2 simultaneously.
Described the first phase sequence relay XJ1 and the second phase sequence relay XJ2 are phase sequence protective relay, and its model is XJ3-G.
Described thermal relay is three phase electric machine overcurrent protection relay, and model is NR2-25, is arranged on 35mm standard electrical installing card rail.
Described start button SB1 is that green is often driven button, and model is NP2-EA31, and stop button SB2 is red normally closed button, and model is NP2-EA42.
The effect of board-like oil filter three-phase power supply phase sequence automatic calibration provided by the invention and phase-lacking protective device: default-phase protection function can be avoided the personal equipment injury causing because of the open phases of three-phase power source that the External Force Actings such as thunderbolt occur; Phase sequence is corrected the personal equipment injury that function can avoid the access of three phase mains anti-phase to cause automatically; Can avoid oil filter to start time, transformer oil suck-back, guarantees clean oil sources.There is the excessive automatic trip control of air pressure function, can guarantee when oil circuit stops up to trip and quit work in time, ensure that oil filter oil circuit can not sustain damage because pressure is excessive.
In addition, implementation process is made easily, cheap, reliable and stable, applied range.Reduced manually try, unnecessary manpower work waste that phase modulation produces, reduce dangerous matter sources.The improvement and design of package unit has thought better of the in use contingent various situation that may endanger human body generation of power consumption equipment, can effectively avoid phase shortage and anti-phase to equipment and the personal injury causing.When use, be automatic control process without in working site Installation and Debugging, both shortened the on-the-spot time that connects power supply process and improved operating efficiency, greatly improved again the security reliability of the person and equipment.
Brief description of the drawings
Fig. 1 is the schematic diagram of board-like oil filter three-phase power supply phase sequence automatic calibration provided by the invention and phase-lacking protective device.
Fig. 2 is phase sequence protective relay electrical connection diagram that in the board-like oil filter three-phase power supply phase sequence automatic calibration providing of the present invention and phase-lacking protective device, model is XJ3-G.
Fig. 3 is the phase sequence protective relay circuit theory diagrams that in board-like oil filter three-phase power supply phase sequence automatic calibration provided by the invention and phase-lacking protective device, model is XJ3-G.
Embodiment
Below in conjunction with the drawings and specific embodiments, board-like oil filter three-phase power supply phase sequence automatic calibration provided by the invention and phase-lacking protective device are elaborated.
As shown in Figure 1, board-like oil filter three-phase power supply phase sequence automatic calibration provided by the invention and phase-lacking protective device comprise: the first contactor coil KM1, the first contactor main contacts KM1-1, the first contactor normally-closed contact KM1-2, the first contactor normally opened contact KM1-3, the first phase sequence relay XJ1, the second contactor coil KM2, the second contactor main contacts KM2-1, the second contactor normally-closed contact KM2-2, the second contactor normally opened contact KM2-3, the second phase sequence relay XJ2, thermal relay FR, the normally closed node FR-1 of thermal relay, start button SB1 and stop button SB2, wherein: first contactor coil KM1 one end is connected with zero line N by the second contactor normally-closed contact KM2-2, the other end is connected with the terminal 6 of the first phase sequence relay XJ1, second contactor coil KM2 one end is connected with zero line N by the first contactor normally-closed contact KM1-2, and the other end is connected with the terminal 5 of the second phase sequence relay XJ2, one end of start button SB1 is connected with three phase mains phase line L1 with the normally closed node FR-1 of thermal relay by stop button SB2, and the other end is connected with the terminal 8 of the first phase sequence relay XJ1 and the terminal 7 of the second phase sequence relay XJ2 simultaneously, the first contactor normally opened contact KM1-3 and the second contactor normally opened contact KM2-3 are simultaneously in parallel with start button SB1, the terminal 1,2,3 of the first phase sequence relay XJ1 is connected with 1,2,3 terminals of thermal relay FR respectively by the first contactor main contacts KM1-1, the terminal 1,3,5 of the second phase sequence relay XJ2 is connected with 1,3,5 terminals of thermal relay FR respectively by the second contactor main contacts KM2-1, 2,4,6 terminals of thermal relay coil FR are connected with terminal U, V, the W of three phase electric machine respectively, the terminal 7 of the first phase sequence relay XJ1 is connected with the terminal 6 of the second phase sequence relay XJ2, the terminal 5 of the first phase sequence relay XJ1 is connected with the terminal 8 of the second phase sequence relay XJ2, three phase mains phase line L1 is connected with the terminal 1 of the first phase sequence relay XJ1 and the terminal 1 of the second phase sequence relay XJ2 simultaneously, three phase mains phase line L2 is connected with the terminal 2 of the first phase sequence relay XJ1 and the terminal 3 of the second phase sequence relay XJ2 simultaneously, three phase mains phase line L3 is connected with the terminal 3 of the first phase sequence relay XJ1 and the terminal 2 of the second phase sequence relay XJ2 simultaneously.
Described the first phase sequence relay XJ1 and the second phase sequence relay XJ2 are phase sequence protective relay, and its model is XJ3-G.
Described the first contactor and the second contactor are three-phase ac contactor, and its model is CJX2-2510.
Described thermal relay FR is three phase electric machine overcurrent protection relay, and model is NR2-25, is arranged on 35mm standard electrical installing card rail.
Described start button SB1 is that green is often driven button, and model is NP2-EA31, and stop button SB2 is red normally closed button, and model is NP2-EA42.
As shown in Figure 1, board-like oil filter three-phase power supply phase sequence automatic calibration provided by the invention and phase-lacking protective device are in the time of work: due to first, second phase sequence relay XJ1, XJ2 is connected on three-phase power line L1, L2, L3 by positive and negative phase sequence.Utilize the phase sequence relay that detects positive and negative phase sequence to control respectively two by the contactor KM1 of paraphase martingale, KM2, realized the identification of automatic phase sequence,, in the time of three-phase power line L1, the L2 of input, L3 phase sequence misphase, its output can be corrected the phase sequence of alternating current automatically; In the time that three-phase power line L1, L2, L3 are positive phase sequence ABC, BCA, CAB, terminal 5,6 conductings of the first phase sequence relay XJ1, terminal 7,8 disconnects, and the terminal 5,6 of the second phase sequence relay XJ2 keeps often opening, and terminal 7,8 remains closed; Now press start button SB1, the first contactor coil KM1 obtains electric, and motor M is input as positive phase sequence, therefore forward.In like manner, in the time that three-phase power line L1, L2, L3 are input as negative phase sequence CBA, ACB, BAC, terminal 5,6 conductings of the second phase sequence relay XJ2, terminal 7,8 disconnects, and the terminal 5,6 of the first phase sequence relay XJ1 keeps often opening, and terminal 7,8 remains closed; Now press start button SB1, the second contactor KM2 obtains electric, and motor input is also positive, is also therefore forward.
When any one lacking mutually (break) phase time in the three-phase of three-phase power line L1, L2, L3, first, second phase sequence relay XJ1, XJ2 are all failure to actuate, and keep terminal 5,6 conductings, terminal 7,8 disconnections; Press after start button SB1, two contactor KM1, not adhesives of KM2, motor M does not start; Therefore, realized default-phase protection function.
Shown in schematic diagram Fig. 2, Fig. 3 of described first, second phase sequence protective relay XJ1, XJ2, in the time that its terminal 1,2,3 is input as respectively positive phase sequence ABC, BCA, CAB, terminal 5,6 conductings of phase sequence protective relay, terminal 7,8 disconnects; When its terminal 1,2,3 is input as respectively negative phase sequence CBA, ACB, BAC or lacks (breaking) phase time, first, second phase sequence protective relay XJ1, XJ2 are failure to actuate, and terminal 5,6 keeps often opening, and terminal 7,8 remains closed.
Positive negative-phase sequence automatic calibration provided by the invention and phase-lacking protective device can utilize the disconnected phase and phase order protection relay that detects positive and negative phase sequence to control respectively two by the contactor of paraphase martingale; realize the automatic identification of the positive negative-phase sequence of three-phase; in the time of the alternating current phase sequence misphase of input, its output can be corrected the phase sequence of alternating current automatically.If there is phase shortage phenomenon, control device can stop immediately motor operation or not carry out start-up performance.
Claims (4)
1. a board-like oil filter three-phase power supply phase sequence automatic calibration and phase-lacking protective device, it is characterized in that: it comprises: the first contactor coil KM1, the first contactor main contacts KM1-1, the first contactor normally-closed contact KM1-2, the first contactor normally opened contact KM1-3, the first phase sequence relay XJ1, the second contactor coil KM2, the second contactor main contacts KM2-1, the second contactor normally-closed contact KM2-2, the second contactor normally opened contact KM2-3, the second phase sequence relay XJ2, thermal relay FR, the normally closed node FR-1 of thermal relay, start button SB1 and stop button SB2, wherein: first contactor coil KM1 one end is connected with zero line N by the second contactor normally-closed contact KM2-2, the other end is connected with the terminal 6 of the first phase sequence relay XJ1, second contactor coil KM2 one end is connected with zero line N by the first contactor normally-closed contact KM1-2, and the other end is connected with the terminal 5 of the second phase sequence relay XJ2, one end of start button SB1 is connected with three phase mains phase line L1 with the normally closed node FR-1 of thermal relay by stop button SB2, and the other end is connected with the terminal 8 of the first phase sequence relay XJ1 and the terminal 7 of the second phase sequence relay XJ2 simultaneously, the first contactor normally opened contact KM1-3 and the second contactor normally opened contact KM2-3 are simultaneously in parallel with start button SB1, the terminal 1,2,3 of the first phase sequence relay XJ1 is connected with 1,2,3 terminals of thermal relay FR respectively by the first contactor main contacts KM1-1, the terminal 1,3,5 of the second phase sequence relay XJ2 is connected with 1,3,5 terminals of thermal relay FR respectively by the second contactor main contacts KM2-1, 2,4,6 terminals of thermal relay coil FR are connected with terminal U, V, the W of three phase electric machine respectively, the terminal 7 of the first phase sequence relay XJ1 is connected with the terminal 6 of the second phase sequence relay XJ2, the terminal 5 of the first phase sequence relay XJ1 is connected with the terminal 8 of the second phase sequence relay XJ2, three phase mains phase line L1 is connected with the terminal 1 of the first phase sequence relay XJ1 and the terminal 1 of the second phase sequence relay XJ2 simultaneously, three phase mains phase line L2 is connected with the terminal 2 of the first phase sequence relay XJ1 and the terminal 3 of the second phase sequence relay XJ2 simultaneously, three phase mains phase line L3 is connected with the terminal 3 of the first phase sequence relay XJ1 and the terminal 2 of the second phase sequence relay XJ2 simultaneously.
2. board-like oil filter three-phase power supply phase sequence automatic calibration according to claim 1 and phase-lacking protective device, is characterized in that: described the first phase sequence relay XJ1 and the second phase sequence relay XJ2 are phase sequence protective relay, and its model is XJ3-G.
3. board-like oil filter three-phase power supply phase sequence automatic calibration according to claim 1 and phase-lacking protective device; it is characterized in that: described thermal relay is three phase electric machine overcurrent protection relay; model is NR2-25, is arranged on 35mm standard electrical installing card rail.
4. board-like oil filter three-phase power supply phase sequence automatic calibration according to claim 1 and phase-lacking protective device; it is characterized in that: described start button SB1 is that green is often driven button; model is NP2-EA31, and stop button SB2 is red normally closed button, and model is NP2-EA42.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373660.4A CN104158148A (en) | 2014-07-31 | 2014-07-31 | Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373660.4A CN104158148A (en) | 2014-07-31 | 2014-07-31 | Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine |
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| CN104158148A true CN104158148A (en) | 2014-11-19 |
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| CN201410373660.4A Pending CN104158148A (en) | 2014-07-31 | 2014-07-31 | Autocorrelation and phase failure protection device for phase sequence of three-phase power source of plate type oil filter machine |
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Cited By (1)
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| CN104600662A (en) * | 2015-03-02 | 2015-05-06 | 臧垒 | Automatic phase-correction protector of three-phase four-line power source |
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| CN104600662A (en) * | 2015-03-02 | 2015-05-06 | 臧垒 | Automatic phase-correction protector of three-phase four-line power source |
| CN104600662B (en) * | 2015-03-02 | 2017-06-20 | 臧垒 | A kind of three-phase four-wire power entangles phase protection device automatically |
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: State Grid Corporation of China Applicant after: State Grid Tianjin Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: State Grid Tianjin Electric Power Company |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141119 |
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| WD01 | Invention patent application deemed withdrawn after publication |