CN203014358U - High capacity contactor start protection circuit - Google Patents
High capacity contactor start protection circuit Download PDFInfo
- Publication number
- CN203014358U CN203014358U CN 201220674143 CN201220674143U CN203014358U CN 203014358 U CN203014358 U CN 203014358U CN 201220674143 CN201220674143 CN 201220674143 CN 201220674143 U CN201220674143 U CN 201220674143U CN 203014358 U CN203014358 U CN 203014358U
- Authority
- CN
- China
- Prior art keywords
- contactor
- circuit
- high capacity
- protection circuit
- output end
- 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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Abstract
The utility model discloses a high capacity contactor start protection circuit. The high capacity contactor start protection circuit comprises connecting an output end of a power source with an input end of a start circuit, connecting an output end of the start circuit and an input end of a contactor, connecting an output end of the contactor with an input end of a lifting operation mechanism and connecting a detection circuit in series between the output end of the contactor and the input end of the start circuit. The protection circuit can protect a high capacity contactor to realize detection and protection during frequent starts and frequent power failure operations within certain time and can effectively avoid hidden safety trouble caused by coil burning during frequent starts and frequent power failure operations on the high capacity contactor, and thereby reliability and production efficiency of equipment are improved.
Description
Technical field:
The utility model relates to a kind of route protection, uses when being specially adapted to the large Capacity AC Contactor of start-up circuit use on crane.
Background technology:
When existing crane complete machine capacity is larger, also the phase strain is large for the capacity of the A.C. contactor that its start-up circuit is controlled, but when using the larger contactor of some brand capacity, its coil is electronic coil, be not suitable for the higher occasion of frequency of operation, if in use start frequently, will inevitably cause coil to be burnt, equipment can not normally use, and even can cause great security incident.
Summary of the invention:
Task of the present utility model is to propose a kind of reliability and high a kind of large volume contactor starting protection circuit of service efficiency that improves equipment.Task of the present utility model is completed like this; a kind of large volume contactor starting protection circuit; it comprises that the output of power supply is connected with the input of start-up circuit; the output of start-up circuit is connected with the input of contactor; the output of contactor is connected with the input of the travelling mechanism that hoists, and it is characterized in that: be serially connected with testing circuit in the middle of the output of contactor and the input of described start-up circuit.
The utlity model has following effect: use protection circuit of the present utility model; can protect large volume contactor detect and protect when frequent starting is with outage within a certain period of time; the potential safety hazard that when effectively having avoided large volume contactor frequent start-stop, coil burnout brings, thus reliability and the production efficiency of equipment improved.
Description of drawings:
Fig. 1 is the prior art block diagram; Fig. 2 is structural representation of the present utility model.
Drawing explanation: 1, power supply, 2, start-up circuit, 3, contactor, 4, the travelling mechanism that hoists, 5, detection line.
Embodiment:
Describe embodiment in detail in conjunction with above accompanying drawing, prior art is referring to Fig. 1, the output of power supply 1 is connected with the input of start-up circuit 2, and the output of start-up circuit is connected with the input of contactor, and the output of contactor 3 is connected with the input of the travelling mechanism that hoists.The different characteristic of the utility model and prior art scheme is: be serially connected with testing circuit 5 in the middle of the input of the output of contactor 3 and described start-up circuit 2, detection line is that the signal that will the contactor frequent starting be detected flows to described start-up circuit 2 protections.
During work; power supply 1 uses AC380V; power supply inputs to contactor through start-up circuit; startup drives the travelling mechanism that hoists and carries out work; detection line detects contactor coil frequent starting whether within a certain period of time; if the contactor coil frequent starting detected, disconnect immediately contactor protection after fault being detected, and output alarm signal alert and attendant process in time and keep in repair.
Claims (1)
1. large volume contactor starting protection circuit; it comprises that the output of power supply is connected with the input of start-up circuit; the output of start-up circuit is connected with the input of contactor; the output of contactor is connected with the input of the travelling mechanism that hoists, and it is characterized in that: be serially connected with testing circuit in the middle of the output of contactor and the input of described start-up circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674143 CN203014358U (en) | 2012-12-10 | 2012-12-10 | High capacity contactor start protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674143 CN203014358U (en) | 2012-12-10 | 2012-12-10 | High capacity contactor start protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203014358U true CN203014358U (en) | 2013-06-19 |
Family
ID=48605915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220674143 Expired - Fee Related CN203014358U (en) | 2012-12-10 | 2012-12-10 | High capacity contactor start protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203014358U (en) |
-
2012
- 2012-12-10 CN CN 201220674143 patent/CN203014358U/en not_active Expired - Fee Related
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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: 20130619 Termination date: 20151210 |
|
| EXPY | Termination of patent right or utility model |