CN203241481U - Middle-high voltage open-phase detecting alarm - Google Patents
Middle-high voltage open-phase detecting alarm Download PDFInfo
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- CN203241481U CN203241481U CN 201320181249 CN201320181249U CN203241481U CN 203241481 U CN203241481 U CN 203241481U CN 201320181249 CN201320181249 CN 201320181249 CN 201320181249 U CN201320181249 U CN 201320181249U CN 203241481 U CN203241481 U CN 203241481U
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Abstract
The utility model relates to the technical field of detection circuits and specifically relates to a middle-high voltage open-phase detecting alarm. The middle-high voltage open-phase detecting alarm includes a high-voltage sampling module and a signal isolating processing module. The high-voltage sampling module is a voltage-dividing sampling circuit composed of voltage-dividing resistors. The signal isolating processing module includes a three-phase half-bridge rectifying circuit, an opto-isolating circuit and an Or-gate operator. According to the utility model, by adopting the circuit structure formed by combining the high-voltage sampling module with the signal isolating processing module together, quick open-phase judgment and alarm of three-phase AC in a range of 380V to 3000V can be realized. At the same time, the middle-high voltage open-phase detecting alarm has advantages that the middle-high voltage open-phase detecting alarm is high in response speed, easy to realize, low in manufacturing cost, small in size.
Description
Technical field
The utility model relates to the testing circuit technical field, is specifically related to a kind of mesohigh phase shortage detection alarm device.
Background technology
In the high pressure rotor frequency conversion system, because the transformer of a built-in high voltage variable mesohigh, in the process of variable frequency work, any one phase shortage of former secondary of built-in transformer all can cause the frequency conversion failure, makes the motor parking or forwards power frequency to.The high pressure rotor frequency converter is to be made of power electronic devices, and higher to the speed responsive requirement that detects, in the high pressure lacuna detection alarm of the prior art, general method is to carry out Check processing after being converted to low pressure by voltage transformer (VT) again.Traditional mechanical type isolating switch detects and can't meet the demands at all, adapted two cover mutual inductors and phase shortage pick-up unit have not only increased volume but also increased cost, the detection method of simultaneously mutual inductor conversion low pressure is also slower on response speed, can't well satisfy the requirement of frequency converter.
Summary of the invention
The purpose of this utility model is to avoid the defective of prior art that a kind of mesohigh phase shortage detection alarm device is provided, thereby effectively solves the defective that exists in the prior art.
For achieving the above object, the technical scheme that the utility model is taked is: described a kind of mesohigh phase shortage detection alarm device, be characterized in comprising high pressure sampling module and signal isolation processing module, described high pressure sampling module is the pressure sampling circuit that divider resistance consists of, and described signal isolation processing module comprises three-phase Half bridge rectifier circuit, optical coupling isolation circuit or the door arithmetical unit that links to each other successively.
Described high pressure sampling module comprises terminal row JP1, JP2 and six high-tension resistives, three road terminals of terminal row JP1 are connected with the 4th port of terminal row JP2 by two resistance of mutually connecting respectively, link to each other with other three road terminals of terminal row JP2 from drawing wiring between two resistance of mutually connecting respectively.
The input end 201,202,203,200 of the three-phase Half bridge rectifier circuit of described signal isolation processing module links to each other with four terminals of terminal row JP2 in the high pressure sampling module respectively, the output of three-phase Half bridge rectifier circuit links to each other with the input end of optical coupling isolation circuit with capacitor C 2 by resistance R 1, the output one end ground connection of optical coupling isolation circuit, the other end is divided into two-way, wherein one the tunnel directly with or the input end of door arithmetical unit link to each other, another road by resistance R 2 respectively with or the input end of arithmetical unit link to each other with the 12V power supply.
The beneficial effects of the utility model are: described a kind of mesohigh phase shortage detection alarm device, its circuit structure by adopting high pressure sampling module and signal isolation processing module to combine, can realize that 380V is carried out quick phase shortage to the three-phase alternating current of 3KV to be judged and report to the police, have advantages of simultaneously fast response time, easily realization, cheap, volume is little.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model high pressure sampling module circuit theory schematic diagram;
Fig. 2 is the utility model signal isolation processing modular circuit principle schematic.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used for explaining the utility model, is not be used to limiting scope of the present utility model.
As shown in Figure 1, described a kind of mesohigh phase shortage detection alarm device, be characterized in comprising high pressure sampling module and signal isolation processing module, described high pressure sampling module is the pressure sampling circuit that divider resistance consists of, and described signal isolation processing module comprises three-phase Half bridge rectifier circuit, optical coupling isolation circuit or the door arithmetical unit that links to each other successively.
Further, described high pressure sampling module comprises terminal row JP1, JP2 and six high-tension resistives, three road terminals of terminal row JP1 are connected with the 4th port of terminal row JP2 by two resistance of mutually connecting respectively, link to each other with other three road terminals of terminal row JP2 from drawing wiring between two resistance of mutually connecting respectively.
Further, the input end 201,202,203,200 of the three-phase Half bridge rectifier circuit of described signal isolation processing module links to each other with four terminals of terminal row JP2 in the high pressure sampling module respectively, the output of three-phase Half bridge rectifier circuit links to each other with the input end of optical coupling isolation circuit with capacitor C 2 by resistance R 1, the output one end ground connection of optical coupling isolation circuit, the other end is divided into two-way, wherein one the tunnel directly with or the input end of door arithmetical unit link to each other, another road by resistance R 2 respectively with or the input end of arithmetical unit link to each other with the 12V power supply.
Described a kind of mesohigh phase shortage detection alarm device, it is long logical by optocoupler behind the three phase half wave rectification when three-phase alternating current is normal in use, or door continues to export low.When three-phase disappearance one phase or is above mutually, the optocoupler intermittent conduction, or the intermittent output of door is high.The rear utmost point of output can add rest-set flip-flop keeps open-phase fault.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. mesohigh phase shortage detection alarm device, it is characterized in that comprising high pressure sampling module and signal isolation processing module, described high pressure sampling module is the pressure sampling circuit that divider resistance consists of, and described signal isolation processing module comprises three-phase Half bridge rectifier circuit, optical coupling isolation circuit or the door arithmetical unit that links to each other successively.
2. a kind of mesohigh phase shortage detection alarm device as claimed in claim 1, it is characterized in that: described high pressure sampling module comprises terminal row JP1, JP2 and six high-tension resistives, three road terminals of terminal row JP1 are connected with the 4th port of terminal row JP2 by two resistance of mutually connecting respectively, link to each other with other three road terminals of terminal row JP2 from drawing wiring between two resistance of mutually connecting respectively.
3. a kind of mesohigh phase shortage detection alarm device as claimed in claim 1, it is characterized in that: the input end 201 of the three-phase Half bridge rectifier circuit of described signal isolation processing module, 202,203,200 link to each other with four terminals of terminal row JP2 in the high pressure sampling module respectively, the output of three-phase Half bridge rectifier circuit links to each other with the input end of optical coupling isolation circuit with capacitor C 2 by resistance R 1, the output one end ground connection of optical coupling isolation circuit, the other end is divided into two-way, wherein one the tunnel directly with or the input end of door arithmetical unit link to each other, another road by resistance R 2 respectively with or the input end of arithmetical unit link to each other with the 12V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181249 CN203241481U (en) | 2013-04-12 | 2013-04-12 | Middle-high voltage open-phase detecting alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181249 CN203241481U (en) | 2013-04-12 | 2013-04-12 | Middle-high voltage open-phase detecting alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203241481U true CN203241481U (en) | 2013-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320181249 Expired - Fee Related CN203241481U (en) | 2013-04-12 | 2013-04-12 | Middle-high voltage open-phase detecting alarm |
Country Status (1)
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| CN (1) | CN203241481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809073A (en) * | 2014-02-19 | 2014-05-21 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of novel welding machine |
-
2013
- 2013-04-12 CN CN 201320181249 patent/CN203241481U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809073A (en) * | 2014-02-19 | 2014-05-21 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of novel welding machine |
| CN103809073B (en) * | 2014-02-19 | 2017-01-25 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of welding machine |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20180412 |