CN204376524U - A kind of easy PT duplicate supply switching circuit - Google Patents
A kind of easy PT duplicate supply switching circuit Download PDFInfo
- Publication number
- CN204376524U CN204376524U CN201520084146.9U CN201520084146U CN204376524U CN 204376524 U CN204376524 U CN 204376524U CN 201520084146 U CN201520084146 U CN 201520084146U CN 204376524 U CN204376524 U CN 204376524U
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- China
- Prior art keywords
- contactor
- air switch
- voltage transformer
- connect
- connects
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Abstract
The utility model discloses a kind of easy PT duplicate supply switching circuit, comprise voltage transformer pt 1 and voltage transformer pt 2, the 2a end of described voltage transformer pt 1 connects 1 end of air switch QA1, the 2b end of voltage transformer pt 1 connects 3 ends of air switch QA1, and the 2c end of voltage transformer pt 1 connects 5 ends of air switch QA1; 2 ends of described air switch QA1 connect the A1 end of A.C. contactor K and 13 ends of A.C. contactor K; The utility model only uses an A.C. contactor when electrical source exchange, cost is low, and wiring is simple, therefore greatly improves operating efficiency, decreases the maintenance man-hours in later stage, therefore relatively has greatly improved with existing technology.
Description
Technical field
The utility model relates to electric field, specifically a kind of easy PT duplicate supply switching circuit.
Background technology
Duplicate supply switching circuit plays very large effect in existing life is produced, and be particularly used in power distribution cabinet, namely this design is beneficial to maintenance, can not affect production again simultaneously, therefore range of application very extensive.
But existing duplicate supply switching circuit is too complicated, especially PT duplicate supply switching circuit (PT: voltage transformer), because when switched voltage instrument transformer, need to use two A.C. contactors, cost is high, and wiring is simultaneously complicated.
Utility model content
The purpose of this utility model is to provide a kind of easy PT duplicate supply switching circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of easy PT duplicate supply switching circuit, comprise voltage transformer pt 1 and voltage transformer pt 2, the 2a end of described voltage transformer pt 1 connects 1 end of air switch QA1, the 2b end of voltage transformer pt 1 connects 3 ends of air switch QA1, and the 2c end of voltage transformer pt 1 connects 5 ends of air switch QA1; 2 ends of described air switch QA1 connect the A1 end of A.C. contactor K and 13 ends of A.C. contactor K; 4 ends of air switch QA1 connect the A2 end of A.C. contactor K and 23 ends of A.C. contactor K; 6 ends of air switch QA1 connect 33 ends of A.C. contactor K; The 2a end of described voltage transformer pt 2 connects 1 end of air switch QA2, and the 2b end of voltage transformer pt 2 connects 3 ends of air switch QA2, and the 2c end of voltage transformer pt 2 connects 5 ends of air switch QA2.
As further program of the utility model: 2 ends of described air switch QA2 connect 51 ends of A.C. contactor K, 4 ends of air switch QA2 connect 61 ends of A.C. contactor K, and 6 ends of air switch QA2 connect 71 ends of A.C. contactor K.
As the utility model further scheme: 72 ends of described A.C. contactor K connect 34 ends of A.C. contactor K; 62 ends of A.C. contactor K connect 34 ends of A.C. contactor K; 52 ends of A.C. contactor K connect 14 ends of A.C. contactor K.
Compared with prior art, the beneficial effects of the utility model are: the utility model only uses an A.C. contactor when electrical source exchange, cost is low, wiring is simple, therefore operating efficiency is greatly improved, decrease the maintenance man-hours in later stage, therefore relatively have greatly improved with existing technology.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of easy PT duplicate supply switching circuit of the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of easy PT duplicate supply switching circuit, comprise voltage transformer pt 1 and voltage transformer pt 2, the 2a end of described voltage transformer pt 1 connects 1 end of air switch QA1, the 2b end of voltage transformer pt 1 connects 3 ends of air switch QA1, and the 2c end of voltage transformer pt 1 connects 5 ends of air switch QA1; 2 ends of described air switch QA1 connect the A1 end of A.C. contactor K and 13 ends of A.C. contactor K; 4 ends of air switch QA1 connect the A2 end of A.C. contactor K and 23 ends of A.C. contactor K; 6 ends of air switch QA1 connect 33 ends of A.C. contactor K.
The 2a end of described voltage transformer pt 2 connects 1 end of air switch QA2, and the 2b end of voltage transformer pt 2 connects 3 ends of air switch QA2, and the 2c end of voltage transformer pt 2 connects 5 ends of air switch QA2; 2 ends of described air switch QA2 connect 51 ends of A.C. contactor K, and 4 ends of air switch QA2 connect 61 ends of A.C. contactor K, and 6 ends of air switch QA2 connect 71 ends of A.C. contactor K; 72 ends of described A.C. contactor K connect 34 ends of A.C. contactor K; 62 ends of A.C. contactor K connect 34 ends of A.C. contactor K; 52 ends of A.C. contactor K connect 14 ends of A.C. contactor K.
Operation principle of the present utility model is: work as PT1, and when PT2 has an electricity, QA1, QA2 close.The adhesive of K coil, starts the auxiliary contact K:13-K:14/K:23-K:24/K:33-K:34 conducting of K contactor, and PT1 voltage circuit starts; The auxiliary contact K:51-K:52/K:61-K:62/K:71-K:72 of K contactor disconnects simultaneously; PT2 voltage circuit disconnects.
2, when PT1 has electricity, QA1, QA2 close.The adhesive of K contactor coil, starts the auxiliary contact K:13-K:14/K:23-K:24/K:33-K:34 conducting of K contactor, and PT1 voltage circuit starts; The auxiliary contact K:51-K:52/K:61-K:62/K:71-K:72 of K contactor disconnects simultaneously.PT2 voltage circuit Non voltage output.
3, when PT2 has electricity, QA1, QA2 close.PT1 Non voltage output, K contactor coil cannot adhesive, and the auxiliary contact K:13-K:14/K:23-K:24/K:33-K2:34 of K contactor is in off-state, and PT2 voltage circuit has voltage to export; The auxiliary contact K:51-K:52/K:61-K:62/K:71-K:72 of K contactor is in the close position, and PT2 voltage exports power supply.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. an easy PT duplicate supply switching circuit, comprise voltage transformer pt 1 and voltage transformer pt 2, the 2a end of described voltage transformer pt 1 connects 1 end of air switch QA1, the 2b end of voltage transformer pt 1 connects 3 ends of air switch QA1, and the 2c end of voltage transformer pt 1 connects 5 ends of air switch QA1; It is characterized in that, 2 ends of described air switch QA1 connect the A1 end of A.C. contactor K and 13 ends of A.C. contactor K; 4 ends of air switch QA1 connect the A2 end of A.C. contactor K and 23 ends of A.C. contactor K; 6 ends of air switch QA1 connect 33 ends of A.C. contactor K; The 2a end of described voltage transformer pt 2 connects 1 end of air switch QA2, and the 2b end of voltage transformer pt 2 connects 3 ends of air switch QA2, and the 2c end of voltage transformer pt 2 connects 5 ends of air switch QA2.
2. easy PT duplicate supply switching circuit according to claim 1, it is characterized in that, 2 ends of described air switch QA2 connect 51 ends of A.C. contactor K, and 4 ends of air switch QA2 connect 61 ends of A.C. contactor K, and 6 ends of air switch QA2 connect 71 ends of A.C. contactor K.
3. easy PT duplicate supply switching circuit according to claim 1, is characterized in that, 72 ends of described A.C. contactor K connect 34 ends of A.C. contactor K; 62 ends of A.C. contactor K connect 34 ends of A.C. contactor K; 52 ends of A.C. contactor K connect 14 ends of A.C. contactor K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520084146.9U CN204376524U (en) | 2015-02-05 | 2015-02-05 | A kind of easy PT duplicate supply switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520084146.9U CN204376524U (en) | 2015-02-05 | 2015-02-05 | A kind of easy PT duplicate supply switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204376524U true CN204376524U (en) | 2015-06-03 |
Family
ID=53332703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520084146.9U Expired - Fee Related CN204376524U (en) | 2015-02-05 | 2015-02-05 | A kind of easy PT duplicate supply switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204376524U (en) |
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2015
- 2015-02-05 CN CN201520084146.9U patent/CN204376524U/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: 20150603 Termination date: 20190205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |