CN203025325U - Auxiliary circuit for rapidly finding motor faults - Google Patents
Auxiliary circuit for rapidly finding motor faults Download PDFInfo
- Publication number
- CN203025325U CN203025325U CN 201220649518 CN201220649518U CN203025325U CN 203025325 U CN203025325 U CN 203025325U CN 201220649518 CN201220649518 CN 201220649518 CN 201220649518 U CN201220649518 U CN 201220649518U CN 203025325 U CN203025325 U CN 203025325U
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- CN
- China
- Prior art keywords
- auxiliary contact
- relay
- microrelay
- auxiliary circuit
- electrothermal relay
- 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.)
- Expired - Fee Related
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- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses an auxiliary circuit for rapidly finding motor faults. The auxiliary circuit comprises thermal relays, contactors and key switches and is characterized in that a micro-relay with an indicating lamp is arranged on a control loop, one outgoing line of a micro-relay coil is connected with the back end of a normally-open auxiliary contact of one thermal relay, and the other one outgoing line of the micro-relay coil 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. By virtue of the auxiliary circuit, whether the thermal relays act or not can be judged according to whether the indicating lamp is lightened or not, and further, the motor faults and control loop faults are distinguished; and the judgment is accurate, the operating efficiency is greatly improved, and the maintenance time is shortened.
Description
Technical field
The utility model relates to a kind of circuit, particularly a kind of auxiliary circuit of electrical fault fast finding.
Background technology
In order to protect motor; electrothermal relay is set on major loop usually prevents that motor from burning out; electrothermal relay often is provided with and opens, normally closed two groups of auxiliary contact; be located on 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 normally closed auxiliary contact simultaneously of auxiliary contact and disconnect.The reason of motor tripping operation fault has a lot, 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.Because the electrical fault reason is a lot, and some fault has certain latency and disguise, and this class hidden failure has not occured, in case occur, harm is larger, gently makes the control system cisco unity malfunction, heavy cause the substantial equipment security incident, cause heavy economic losses.
The utility model content
Technical problem to be solved in the utility model is, a kind of auxiliary circuit of electrical fault fast finding is provided, and this auxiliary circuit can judge electrical fault fast, in time processes.
In view of above-mentioned technical matters, the technical scheme that the utility model is taked is, a kind of auxiliary circuit of electrical fault fast finding, comprise electrothermal relay, contactor, keyswitch, it is characterized in that, microrelay from tape light is set on control loop, and an extension line of microrelay coil is connected with the rear end that auxiliary contact often left by electrothermal relay, and another extension line of microrelay coil is connected with zero line or live wire; The extension line of often driving auxiliary contact of microrelay is connected with the front end that auxiliary contact often left by electrothermal relay.
The utility model 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 utility model is in electrothermal relay auxiliary contact normally off auxiliary circuit connection diagram.
Fig. 2 is that the utility model is in electrothermal relay auxiliary contact normally open auxiliary circuit connection diagram.
In 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 last motor 1 that connects of electrothermal relay 2 again, consists of major loop.Between two live wires or between live wire and zero line, secondary control loop is set, in secondary control loop in the auxiliary contact of electrothermal relay 2 and secondary control loop the 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 control loop, an extension line of microrelay 6 coils is connected with the rear end that auxiliary contact often left by electrothermal relay 2, and another extension line of microrelay 6 coils is connected with zero line (N) or live wire; The extension line of often driving auxiliary contact of microrelay 6 is connected 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 utility model is in electrothermal relay 2 auxiliary contact normally off auxiliary circuit connection diagrams.Be connected between live wire and zero line (N).During due to 2 work of secondary control loop electrothermal relay, normally closed auxiliary contact is in normally off, and enforcement the utility model 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) is connected with one group of rear end of often driving auxiliary contact of increase, and another extension line of microrelay 6 coils is connected with zero line (N); The extension line of often driving auxiliary contact of microrelay 6 is connected with the front end that auxiliary contact often left by electrothermal relay 2, consists of auxiliary circuit.Press and often open keyswitch 5 before contactor 3, the coils in 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 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, no action of electrothermal relay 2 is described, that just checks control loop broken string, dead electricity, under-voltage, the problems such as contactor coil damage.After fault handling, again press and often open keyswitch 5 before contactor 3, motor 1 resumes operation.
Embodiment 2:As shown in Figure 2, Fig. 2 is that the utility model is in electrothermal relay 2 auxiliary contact normally open auxiliary circuit connection diagrams.Be connected between live wire and 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 contactor 3, coil in 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) is connected 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 is connected with live wire; The extension line of often driving auxiliary contact of microrelay 6 is connected 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 relay 7 gets electric, inner normally closed auxiliary contact disconnects, make the coil losing electricity in contactor 3, inside is often driven auxiliary contact and is also disconnected, and the coil in 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, no action of microrelay 6 is described, 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, microrelay from tape light is set on control loop, an extension line of microrelay coil is connected with the rear end that auxiliary contact often left by electrothermal relay, and another extension line of microrelay coil is connected with zero line or live wire; The extension line of often driving auxiliary contact of microrelay is connected with the front end that auxiliary contact often left by electrothermal relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220649518 CN203025325U (en) | 2012-12-01 | 2012-12-01 | Auxiliary circuit for rapidly finding motor faults |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220649518 CN203025325U (en) | 2012-12-01 | 2012-12-01 | Auxiliary circuit for rapidly finding motor faults |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203025325U true CN203025325U (en) | 2013-06-26 |
Family
ID=48649304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220649518 Expired - Fee Related CN203025325U (en) | 2012-12-01 | 2012-12-01 | Auxiliary circuit for rapidly finding motor faults |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203025325U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937702A (en) * | 2012-12-01 | 2013-02-20 | 新余钢铁集团有限公司 | Auxiliary circuit capable of rapidly searching motor fault |
-
2012
- 2012-12-01 CN CN 201220649518 patent/CN203025325U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937702A (en) * | 2012-12-01 | 2013-02-20 | 新余钢铁集团有限公司 | Auxiliary circuit capable of rapidly searching motor fault |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20151201 |
|
| EXPY | Termination of patent right or utility model |