CN102937702A - Auxiliary circuit capable of rapidly searching motor fault - Google Patents
Auxiliary circuit capable of rapidly searching motor fault Download PDFInfo
- Publication number
- CN102937702A CN102937702A CN2012105034715A CN201210503471A CN102937702A CN 102937702 A CN102937702 A CN 102937702A CN 2012105034715 A CN2012105034715 A CN 2012105034715A CN 201210503471 A CN201210503471 A CN 201210503471A CN 102937702 A CN102937702 A CN 102937702A
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- relay
- auxiliary contact
- auxiliary circuit
- microrelay
- auxiliary
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Abstract
The invention discloses an auxiliary circuit capable of rapidly searching motor faults. The auxiliary circuit comprises a thermal relay, a contactor and a key switch. The auxiliary circuit is characterized in that a control circuit is provided with a micro-relay (provided with an indicator light), one outgoing line of a coil of the micro-relay is connected with the rear end of a normally open auxiliary contact of the thermal relay, and the other outgoing line of the coil of the micro-relay is connected with a zero line or a power line; and an outgoing line of a normally open auxiliary contact of the micro-relay is connected with the front end of the normally open auxiliary contact of the thermal relay. The auxiliary circuit has the advantages that the arranged auxiliary circuit can judge whether the thermal relay operates or not according to the action of the micro-relay and the lightening situation of the indicator light so as to distinguish the motor faults or the control circuit faults, the judgment is accurate, the work efficiency is greatly enhanced, and the maintenance time is shortened.
Description
Technical field
The present invention relates to a kind of circuit, particularly a kind of auxiliary circuit of electrical fault fast finding.
Background technology
In order to protect motor; usually at major loop electrothermal relay is set and prevents that motor from burning out; electrothermal relay often is provided with and opens, normally closed two groups of auxiliary contact; be located on the control loop; can be used alone or in combination; when being used in combination, often open, normally closed auxiliary contact has linkage function, namely often open the closed simultaneously normally closed auxiliary contact of auxiliary contact and disconnect.The reason of motor tripping operation fault has a lot, such as motor overload, overcurrent, and control loop broken string, dead electricity, under-voltage, contactor coil damages etc. if search one by one, will inevitably be wasted the plenty of time.Owing to the electrical fault reason is a lot, and some fault has certain latency and disguise, and this class hidden failure has not occured then, in case occur, then harm is larger, gently then makes the control system cisco unity malfunction, heavy then cause the substantial equipment security incident, cause heavy economic losses.
Summary of the invention
Technical matters to be solved by this invention is, a kind of auxiliary circuit of electrical fault fast finding is provided, and this auxiliary circuit can be judged electrical fault fast, in time processes.
In view of above-mentioned technical matters, the technical scheme that the present invention takes is, a kind of auxiliary circuit of electrical fault fast finding, comprise electrothermal relay, contactor, keyswitch, it is characterized in that, at control loop microrelay (from tape light) is set, an extension line of microrelay coil links to each other with the rear end that auxiliary contact often left by electrothermal relay, and another extension line of microrelay coil links to each other with zero line or live wire; The extension line of often driving auxiliary contact of microrelay links to each other with the front end that auxiliary contact often left by electrothermal relay.
The present invention compared with prior art, its advantage is that auxiliary circuit is set, and moves according to microrelay, whether pilot lamp is lighted, and judges whether electrothermal relay moves, and then differentiation is electrical fault or control loop fault, accuracy of judgement is increased work efficiency greatly, shortens the repair time.
Description of drawings
Fig. 1 is that the present invention is in electrothermal relay auxiliary contact normally off auxiliary circuit connection diagram.
Fig. 2 is that the present invention is in electrothermal relay auxiliary contact normally open auxiliary circuit connection diagram.
Among the figure: 1, motor, 2, electrothermal relay (KH), 3, contactor (KM), 4, air switch, 5, keyswitch, 6, the microrelay (KA1) of tape light, 7, relay (KA).
Embodiment
As shown in Figure 1 and Figure 2, industrial motor uses the 380V alternating current usually, and alternating current connects contactor 3 by air switch 4 and connects the electrothermal relay 2 last motors 1 that connect again, and consists of major loop.Between two live wires or between live wire and the zero line secondary control loop is set, in the secondary control loop in the auxiliary contact of electrothermal relay 2 and the secondary control loop coil of contactor 3, auxiliary contact and keyswitch 5 control the operation of motor 1.A kind of auxiliary circuit of electrical fault fast finding, comprise electrothermal relay 2, contactor 3, keyswitch 5, it is characterized in that, microrelay 6 from tape light is set in the control loop, an extension line of microrelay 6 coils links to each other with the rear end that auxiliary contact often left by electrothermal relay 2, and another extension line of microrelay 6 coils links to each other with zero line (N) or live wire; The extension line of often driving auxiliary contact of microrelay 6 links to each other with the front end that auxiliary contact often left by electrothermal relay 2, consists of auxiliary circuit.
Embodiment 1:As shown in Figure 1, Fig. 1 is that the present invention is in electrothermal relay 2 auxiliary contact normally off auxiliary circuit connection diagrams.Be connected between live wire and the zero line (N).Because normally closed auxiliary contact is in normally off during 2 work of secondary control loop electrothermal relay, enforcement the present invention need to increase by one group and often drive auxiliary contact, is used in combination.An extension line from microrelay 6 coils of tape light (220V) links to each other with one group of rear end of often driving auxiliary contact of increase, and another extension line of microrelay 6 coils links to each other with zero line (N); The extension line of often driving auxiliary contact of microrelay 6 links to each other with the front end that auxiliary contact often left by electrothermal relay 2, consists of auxiliary circuit.Press and often open keyswitch 5 before the contactor 3, the coils in the contactor 3 get electric, and auxiliary contact closure, self-locking are often opened in inside, and the main contacts of contactor 3 is closed, starter motor 1 operation.Main contacts tripping when contactor 3, motor 1 is out of service, if electrothermal relay 2 actions, one group of normally closed auxiliary contact of electrothermal relay 2 disconnects, another group that links is simultaneously often opened the auxiliary contact closure, coil in the microrelay 6 gets electric, and auxiliary contact closure, self-locking are often opened in inside, and pilot lamp is lighted, even electrothermal relay 2 resets, the pilot lamp of microrelay 6 is still bright, can determine fault at motor 1, checks motor 1 overcurrent or overload situations.If it is bright that the pilot lamp of microrelay 6 does not have, illustrate that electrothermal relay 2 does not have action, that just checks control loop broken string, dead electricity, under-voltage, the problems such as contactor coil damage.After the fault handling, again press and often open keyswitch 5 before the contactor 3, motor 1 resumes operation.
Embodiment 2:As shown in Figure 2, Fig. 2 is that the present invention is in electrothermal relay 2 auxiliary contact normally open auxiliary circuit connection diagrams.Be connected between live wire and the live wire.Because secondary control loop electrothermal relay 2 is in normally open, control loop itself is provided with relay 7, presses often to open keyswitch 5 before the contactor 3, coil in the contactor 3 gets electric, auxiliary contact closure, self-locking are often opened in inside, and the main contacts of contactor 3 is closed, starter motor 1 operation.An extension line from microrelay 6 coils of tape light (380V) links to each other with the rear end of often driving auxiliary contact electrothermal relay 2 by normally closed auxiliary contact, and another extension line of microrelay 6 coils links to each other with live wire; The extension line of often driving auxiliary contact of microrelay 6 links to each other with the front end that auxiliary contact often left by electrothermal relay 2, consists of auxiliary circuit.Main contacts tripping when contactor 3, motor 1 is out of service, if electrothermal relay 2 actions, the auxiliary contact of electrothermal relay 2 by when work off-state transfer closure to, coil in the relay 7 gets electric, inner normally closed auxiliary contact disconnects, so that the coil losing electricity in the contactor 3, inside is often driven auxiliary contact and is also disconnected, and the coil in the microrelay 6 gets electric, and auxiliary contact closure, self-locking are often opened in inside, simultaneously inner normally closed auxiliary contact disconnects, pilot lamp is lighted, and can determine fault at motor 1, checks motor 1 overcurrent or overload situations.If it is bright that the pilot lamp of microrelay 6 does not have, illustrate that microrelay 6 does not have action, that just checks control loop broken string, dead electricity, under-voltage, the problems such as contactor coil damage.
Claims (1)
1. the auxiliary circuit of an electrical fault fast finding, comprise electrothermal relay, contactor, keyswitch, it is characterized in that, at control loop microrelay (from tape light) is set, an extension line of microrelay coil links to each other with the rear end that auxiliary contact often left by electrothermal relay, and another extension line of microrelay coil links to each other with zero line or live wire; The extension line of often driving auxiliary contact of microrelay links to each other with the front end that auxiliary contact often left by electrothermal relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105034715A CN102937702A (en) | 2012-12-01 | 2012-12-01 | Auxiliary circuit capable of rapidly searching motor fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105034715A CN102937702A (en) | 2012-12-01 | 2012-12-01 | Auxiliary circuit capable of rapidly searching motor fault |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102937702A true CN102937702A (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105034715A Pending CN102937702A (en) | 2012-12-01 | 2012-12-01 | Auxiliary circuit capable of rapidly searching motor fault |
Country Status (1)
| Country | Link |
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| CN (1) | CN102937702A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443482A (en) * | 2018-09-29 | 2019-03-08 | 南京化学工业园热电有限公司 | Electric precipitation ash bucket level measurement warning device, alarm method and alarm method of calibration |
| CN109785719A (en) * | 2019-03-27 | 2019-05-21 | 厦门大学嘉庚学院 | Portable electric wiring fault finding training box and using method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5582063A (en) * | 1978-12-15 | 1980-06-20 | Fuoresuto:Kk | Motor failure detector |
| US4319297A (en) * | 1980-02-07 | 1982-03-09 | Arie Lapsker | Low winding resistance protective device |
| JPH01144390A (en) * | 1987-11-27 | 1989-06-06 | Toshiba Corp | Control center |
| JPH04291182A (en) * | 1991-03-20 | 1992-10-15 | Sumitomo Jukikai Plast Mach Kk | Measuring device of insulation resistance of motor |
| JPH1144390A (en) * | 1997-05-26 | 1999-02-16 | Furukawa Electric Co Ltd:The | Pipe joint |
| CN201466683U (en) * | 2009-08-07 | 2010-05-12 | 上海船厂船舶有限公司 | Multi-motor protection and fault detection device |
| CN203025325U (en) * | 2012-12-01 | 2013-06-26 | 新余钢铁集团有限公司 | Auxiliary circuit for rapidly finding motor faults |
-
2012
- 2012-12-01 CN CN2012105034715A patent/CN102937702A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5582063A (en) * | 1978-12-15 | 1980-06-20 | Fuoresuto:Kk | Motor failure detector |
| US4319297A (en) * | 1980-02-07 | 1982-03-09 | Arie Lapsker | Low winding resistance protective device |
| JPH01144390A (en) * | 1987-11-27 | 1989-06-06 | Toshiba Corp | Control center |
| JPH04291182A (en) * | 1991-03-20 | 1992-10-15 | Sumitomo Jukikai Plast Mach Kk | Measuring device of insulation resistance of motor |
| JPH1144390A (en) * | 1997-05-26 | 1999-02-16 | Furukawa Electric Co Ltd:The | Pipe joint |
| CN201466683U (en) * | 2009-08-07 | 2010-05-12 | 上海船厂船舶有限公司 | Multi-motor protection and fault detection device |
| CN203025325U (en) * | 2012-12-01 | 2013-06-26 | 新余钢铁集团有限公司 | Auxiliary circuit for rapidly finding motor faults |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443482A (en) * | 2018-09-29 | 2019-03-08 | 南京化学工业园热电有限公司 | Electric precipitation ash bucket level measurement warning device, alarm method and alarm method of calibration |
| CN109785719A (en) * | 2019-03-27 | 2019-05-21 | 厦门大学嘉庚学院 | Portable electric wiring fault finding training box and using method |
| CN109785719B (en) * | 2019-03-27 | 2024-04-12 | 厦门大学嘉庚学院 | Portable electric wiring fault finding training box and using method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130220 |