CN204947581U - A kind of station service cuts decision logic circuit soon - Google Patents
A kind of station service cuts decision logic circuit soon Download PDFInfo
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- CN204947581U CN204947581U CN201520768682.0U CN201520768682U CN204947581U CN 204947581 U CN204947581 U CN 204947581U CN 201520768682 U CN201520768682 U CN 201520768682U CN 204947581 U CN204947581 U CN 204947581U
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Abstract
The utility model provides a kind of station service and cuts decision logic circuit soon, comprises circuit breaker and divides a signal, circuit breaker current, logical block, abnormality alarming unit and start fast cut unit; Described circuit breaker divides a signal to be connected with abnormality alarming unit and the input starting fast cut unit respectively by the output of logical block with the input of circuit breaker current.The damage electrical source exchange logic of the utility model design, cut soon except function except starting station service when having former working power circuit breaker jump, false tripping concurrently, also avoid the leak of former logic, realize automatically detecting circuit breaker position abnormal signal function, stopped to switch phenomenon by mistake.Meanwhile, add circuit breaker position abnormal signal alarm function, strengthen 6kV system run all right, ensure that device security.
Description
Technical field
The utility model relates to safety technique for using electricity field, and concrete a kind of station service cuts decision logic circuit soon.
Background technology
Large-size thermal power plant 6kV station service is equipped with main power supply, auxiliary power high-speed transfer device is applicable to the quick switching of service power, possess main power supply under normal circumstances mutually switch or under accident and abnormal conditions working power to stand-by power supply unidirectional handover function.
Wherein damage has a kind of situation to be that working power switch mis-jumping starts in switching.All adopt working power position of the switch auxiliary node as basis for estimation in existing situation, when auxiliary node disconnects, fast switching device acquiescence working power switch disconnects, thus startup is cut soon.And in actual moving process, mechanical mechanism is aging, auxiliary node contact oxidation, secondary cable ground connection, the reasons such as secondary cable broken string all may cause fast switching device not collect working power switch co-bit signal, cause station service to switch, electrical source exchange process just may cause Important Auxiliary equipment trip, affects whole generating set reliability of operation by mistake.In order to avoid this kind of situation occurs, a kind of circuit breaker abnormal logic detection of specialized designs.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of station service and cuts decision logic circuit soon, and this station service is cut decision logic circuit soon and divided a signal, circuit breaker current, logical block, abnormality alarming unit by circuit breaker and start fast cut unit and solve station service by mistake switching problem.
The utility model is achieved by the following technical programs.
A kind of station service that the utility model provides cuts decision logic circuit soon, comprise circuit breaker divide a signal, circuit breaker current detection signal, logical block, abnormality alarming unit and start fast cut unit, described circuit breaker divides a signal to be connected with abnormality alarming unit and the signal input part starting fast cut unit respectively by logical block with circuit breaker current detection signal.
Described circuit breaker divide a signal and circuit breaker current detection signal respectively with being connected with two signal input parts of door A in logical block, be connected with the signal input part of abnormality alarming unit with the signal output part of door A.
Described circuit breaker divides a signal to be connected with a signal input part of door B, and circuit breaker current detection signal is oppositely rear to be connected with another signal input part of door B, is connected with the signal input part starting fast cut unit with the signal output part of door B.
The beneficial effects of the utility model are: the damage electrical source exchange logic of the utility model patented technology design, cut soon except function except starting station service when having former working power circuit breaker jump, false tripping concurrently, also avoid the leak of former logic, realize automatically detecting circuit breaker position abnormal signal function, stopped to switch phenomenon by mistake.Meanwhile, add circuit breaker position abnormal signal alarm function, strengthen 6kV system run all right, ensure that device security.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Further describe the technical solution of the utility model below, but described in claimed scope is not limited to.
A kind of station service as shown in Figure 1 cuts decision logic circuit soon, comprise circuit breaker divide a signal, circuit breaker current detection signal, logical block, abnormality alarming unit and start fast cut unit, it is characterized in that: described circuit breaker divides a signal to be connected with abnormality alarming unit and the signal input part starting fast cut unit respectively by logical block with circuit breaker current detection signal.
Described circuit breaker divide a signal and circuit breaker current detection signal respectively with being connected with two signal input parts of door A in logical block, be connected with the signal input part of abnormality alarming unit with the signal output part of door A.In circuit-breaker status abnormality alarming logic, circuit breaker divides a signal and circuit breaker current to be more than or equal to 10% rated current to meet simultaneously, and after time delay 2s, abnormality alarming unit sends working power abnormality alarming.
Described circuit breaker divides a signal to be connected with a signal input part of door B, and circuit breaker current detection signal is oppositely rear to be connected with another signal input part of door B, is connected with the signal input part starting fast cut unit with the signal output part of door B.In the abnormal switch logic of circuit-breaker status, circuit breaker divides a signal to meet, and crowbar current is more than or equal to 10% rated current and does not meet, and starts fast cut unit and start electrical source exchange after time delay 30ms.
The damage electrical source exchange logic of the utility model patented technology design, designs working power circuit breaker position abnormal signal and detects alarm function and the improper switch logic of a kind of Novel work power circuit breaker.
Claims (3)
1. a station service cuts decision logic circuit soon, comprise circuit breaker divide a signal, circuit breaker current detection signal, logical block, abnormality alarming unit and start fast cut unit, it is characterized in that: described circuit breaker divides a signal to be connected with abnormality alarming unit and the signal input part starting fast cut unit respectively by logical block with circuit breaker current detection signal.
2. station service as claimed in claim 1 cuts decision logic circuit soon, it is characterized in that: described circuit breaker divide a signal and circuit breaker current detection signal respectively with being connected with two signal input parts of door A in logical block, be connected with the signal input part of abnormality alarming unit with the signal output part of door A.
3. station service as claimed in claim 1 cuts decision logic circuit soon, it is characterized in that: described circuit breaker divides a signal to be connected with a signal input part of door B, circuit breaker current detection signal is oppositely rear to be connected with another signal input part of door B, is connected with the signal input part starting fast cut unit with the signal output part of door B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520768682.0U CN204947581U (en) | 2015-09-30 | 2015-09-30 | A kind of station service cuts decision logic circuit soon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520768682.0U CN204947581U (en) | 2015-09-30 | 2015-09-30 | A kind of station service cuts decision logic circuit soon |
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| Publication Number | Publication Date |
|---|---|
| CN204947581U true CN204947581U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520768682.0U Active CN204947581U (en) | 2015-09-30 | 2015-09-30 | A kind of station service cuts decision logic circuit soon |
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| CN (1) | CN204947581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711261A (en) * | 2020-07-02 | 2020-09-25 | 陕西榆林能源集团横山煤电有限公司 | Method for manually switching factory power supply to different network power supply and automatically judging |
-
2015
- 2015-09-30 CN CN201520768682.0U patent/CN204947581U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711261A (en) * | 2020-07-02 | 2020-09-25 | 陕西榆林能源集团横山煤电有限公司 | Method for manually switching factory power supply to different network power supply and automatically judging |
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