CN204858521U - Cross undervoltage protection switch from double entry - Google Patents
Cross undervoltage protection switch from double entry Download PDFInfo
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- CN204858521U CN204858521U CN201520682761.XU CN201520682761U CN204858521U CN 204858521 U CN204858521 U CN 204858521U CN 201520682761 U CN201520682761 U CN 201520682761U CN 204858521 U CN204858521 U CN 204858521U
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- undervoltage protection
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Abstract
The utility model relates to a cross undervoltage protection switch from double entry. It includes power supply circuit, voltage sampling circuit, microprocessor, silicon controlled rectifier, electromagnetic switch unit and drive circuit, microprocessor carries out whether excessive pressure or under -voltage judgement to grid voltage and according to the judged result to drive circuit output actuation signal or release signal, when grid voltage is in excessive pressure or undervoltage state, microprocessor output actuation signal, drive circuit control silicon controlled rectifier switches on, the tripping operation of electromagnetic switch unit, when grid voltage was in normal condition, microprocessor exported the release signal, and drive circuit control silicon controlled rectifier ends, and the electromagnetic switch unit closes a floodgate, microprocessor sets for has a delay time T, and normal condition is resumeed at grid voltage in electromagnetic switch unit tripping operation back, and normal condition maintains T after the time, and microprocessor just exports the release signal. The utility model discloses simple structure, work more reliably, more stable.
Description
Technical field
The utility model relates to a kind of switch, especially a kind of Self-recover overvoltage-undervoltage protection switch.
Background technology
Protection switch is applied in circuit, can play certain protective effect.At present, in common self-recoverage overvoltage/undervoltage protection switch, protection load can be played and cause damaging from overvoltage, under voltage.But these self-recoverage overvoltage/undervoltage protection switch structures are comparatively complicated; and deficient in stability, when especially running into the situation occurring overvoltage or under voltage in the short time by spells, reliability and poor stability; load at short notice by spells power-off with connect electricity, easily cause load to damage.
Summary of the invention
The purpose of this utility model is to propose the simple Self-recover overvoltage-undervoltage protection switch of a kind of structure.
Above-mentioned purpose is achieved by the following technical solution:
A kind of Self-recover overvoltage-undervoltage protection switch, comprises for providing the power circuit of DC power supply, for gathering the voltage sampling circuit of line voltage, microprocessor, controllable silicon, electromagnetic switch unit and for controlling silicon controlled drive circuit; The input of described power circuit connects electrical network, and its output is connected with microprocessor, drive circuit and controllable silicon respectively; The input of described voltage sampling circuit connects electrical network, and its output is connected to make described microprocessor to carry out whether overvoltage or under-voltage judgement to line voltage with microprocessor; The input of described drive circuit is connected with microprocessor, and its output is connected with controllable silicon; Described electromagnetic switch unit is connected between electrical network and load selectively to make load connect or to cut off electrical network; Described microprocessor carries out whether overvoltage or under-voltage judgement to line voltage and exports pickup signal or release signal according to judged result to drive circuit; When line voltage is in overvoltage or under-voltage condition, microprocessor exports pickup signal, and drive circuit controls controlled silicon conducting, and electromagnetic switch unit trips; When line voltage is in normal condition, microprocessor exports release signal, and drive circuit controls controllable silicon cut-off, and electromagnetic switch unit closes a floodgate; Described microprocessor is set with a delay time T, after the tripping operation of electromagnetic switch unit, recovers normal condition at line voltage, and after normal condition maintenance T time, microprocessor just exports release signal.
The utility model structure is simple, and by adopting microprocessor voltage detecting and control, the adjustment of operation voltage value, delay time is simple, and precision is high, and available protecting load causes damaging from overvoltage, under voltage.Adopt controllable silicon as executive component, make to run power consumption hardly at ordinary times, energy-conserving and environment-protective, after protection act, when power up is in normal voltage range, automatically switch on power, ensure that the continuity of power supply, ensured power supply quality.And this Self-recover overvoltage-undervoltage protection switch work can be made more reliable, more stable by arranging delay time T, avoid occurring load power-off and the situation connecing electricity by spells at short notice, more effectively protect load.
Technique scheme can adopt following measure to be improved further:
Described microprocessor comprises a timing module, and described delay time T is set by timing module, by arranging timing module, makes structure more simple, more rationally.
The value of described delay time T be 20 seconds by 40 seconds, reasonable in design, improve reliability and stability.
Described pickup signal and release signal are pulse signal.
The value of described delay time T is 30 seconds.
This Self-recover overvoltage-undervoltage protection switch also comprises working state indicating circuit, and described working state indicating circuit is connected with microprocessor, conveniently artificially uses and operates.
Described working state indicating circuit comprises normal condition indicator light and overvoltage or under-voltage condition indicator light; When line voltage is in overvoltage or under-voltage condition, normal condition indicator light goes out, and overvoltage or under-voltage condition indicator light bright; When line voltage is in normal condition, normal condition indicator light is bright, and overvoltage or under-voltage condition indicator light go out.
Described microprocessor comprises one for judging whether line voltage is overvoltage or under-voltage judge module, by arranging judge module, makes structure more simple, more rationally.
The utility model structure is simple, and by adopting microprocessor voltage detecting and control, the adjustment of operation voltage value, delay time is simple, and precision is high, and available protecting load causes damaging from overvoltage, under voltage.Adopt controllable silicon as executive component, make to run power consumption hardly at ordinary times, energy-conserving and environment-protective, after protection act, when power up is in normal voltage range, automatically switch on power, ensure that the continuity of power supply, ensured power supply quality.And this Self-recover overvoltage-undervoltage protection switch work can be made more reliable, more stable by arranging delay time T, avoid occurring load power-off and the situation connecing electricity by spells at short notice, more effectively protect load.
Accompanying drawing explanation
Fig. 1 shows circuitry block schematic diagram of the present utility model;
Fig. 2 shows circuit diagram of the present utility model.
Embodiment:
As depicted in figs. 1 and 2, a kind of Self-recover overvoltage-undervoltage protection switch, comprises for providing the power circuit 1 of DC power supply, for gathering the voltage sampling circuit 2 of line voltage, microprocessor 3, controllable silicon 4, electromagnetic switch unit 5 and the drive circuit 6 for controlling controllable silicon 4;
The input of described power circuit 6 connects electrical network, and its output is connected with microprocessor 3, drive circuit 6 and controllable silicon 4 respectively;
The input of described voltage sampling circuit 2 connects electrical network, and its output is connected to make described microprocessor to carry out whether overvoltage or under-voltage judgement to line voltage with microprocessor 3;
The input of described drive circuit 6 is connected with microprocessor 3, and its output is connected with controllable silicon 4;
Described electromagnetic switch unit 5 is connected between electrical network and load selectively to make load connect or to cut off electrical network;
Described microprocessor carries out whether overvoltage or under-voltage judgement to line voltage and exports pickup signal or release signal according to judged result to drive circuit;
When line voltage is in overvoltage or under-voltage condition, microprocessor exports pickup signal, and drive circuit controls controlled silicon conducting, and electromagnetic switch unit trips;
When line voltage is in normal condition, microprocessor exports release signal, and drive circuit controls controllable silicon cut-off, and electromagnetic switch unit closes a floodgate;
Described microprocessor is set with a delay time T, after the tripping operation of electromagnetic switch unit, recovers normal condition at line voltage, and after normal condition maintenance T time, microprocessor just exports release signal, and electromagnetic switch unit is converted to combined floodgate from tripping operation.If overvoltage or under-voltage situation appear in line voltage again in T time, need wait until that microprocessor detects that line voltage to recover after normal condition delay time T again again.
In the present embodiment, described power circuit can provide direct current 5V power supply, and drive circuit drives controllable silicon to provide instantaneous operation energy.
Described microprocessor comprises a timing module 31, and described delay time T is set by timing module.Described timing module 31 can be hardware or software program.
The value of described delay time T is 20 seconds to 40 seconds.Especially, the value of described delay time T is 30 seconds.
Described pickup signal and release signal are pulse signal.
This Self-recover overvoltage-undervoltage protection switch also comprises working state indicating circuit 7, and described working state indicating circuit is connected with microprocessor.
Described working state indicating circuit comprises normal condition indicator light and overvoltage or under-voltage condition indicator light;
When line voltage is in overvoltage or under-voltage condition, normal condition indicator light goes out, and overvoltage or under-voltage condition indicator light bright;
When line voltage is in normal condition, normal condition indicator light is bright, and overvoltage or under-voltage condition indicator light go out.
Described microprocessor comprises one for judging whether line voltage is overvoltage or under-voltage judge module 32.Described judge module can set the threshold value with a certain voltage range, for comparing line voltage and threshold value to judge that whether line voltage is overvoltage or under-voltage.Described judge module 32 can be hardware or software program.
Operation principle of the present utility model is as follows:
After electrical network powers on, microprocessor is by the continuous detection of grid voltage of voltage sampling circuit, when detecting that line voltage is in normal range (NR), exporting two groups of signals, exporting to working state indicating circuit for one group, normal condition indicator light is bright, another road exports pickup signal to drive circuit, and control controllable silicon by drive circuit and end, electromagnetic switch unit closes a floodgate, connect major loop, electrical network is load normal power supply.When line voltage overvoltage or under-voltage time; by voltage sampling circuit, microprocessor detects that line voltage is in overvoltage or under-voltage condition; export two groups of signals, export to working state indicating circuit for one group, overvoltage or under-voltage condition indicator light bright; another road exports release signal to drive circuit; control controlled silicon conducting by drive circuit, electromagnetic switch unit trips, and cuts off major loop; load power down, reaches overvoltage/undervoltage protection object.
When line voltage recovers normal, by voltage sampling circuit, microprocessor detects that line voltage recovers normal, normal signal exports to working state indicating circuit, overvoltage or under-voltage condition indicator light go out, normal condition indicator light is bright, and (T time can be 20 seconds to enter T time time delay timing, 30 seconds or 40 seconds etc.), when line voltage in T time is all normal, microprocessor just exports pickup signal to drive circuit, control controllable silicon by drive circuit to end, electromagnetic switch unit closes a floodgate, connect major loop, electrical network is that load restoration is powered, reach runback object.
Claims (8)
1. a Self-recover overvoltage-undervoltage protection switch, is characterized in that:
Comprise for providing the power circuit of DC power supply, for gathering the voltage sampling circuit of line voltage, microprocessor, controllable silicon, electromagnetic switch unit and for controlling silicon controlled drive circuit;
The input of described power circuit connects electrical network, and its output is connected with microprocessor, drive circuit and controllable silicon respectively;
The input of described voltage sampling circuit connects electrical network, and its output is connected to make described microprocessor to carry out whether overvoltage or under-voltage judgement to line voltage with microprocessor;
The input of described drive circuit is connected with microprocessor, and its output is connected with controllable silicon;
Described electromagnetic switch unit is connected between electrical network and load selectively to make load connect or to cut off electrical network;
Described microprocessor carries out whether overvoltage or under-voltage judgement to line voltage and exports pickup signal or release signal according to judged result to drive circuit;
When line voltage is in overvoltage or under-voltage condition, microprocessor exports pickup signal, and drive circuit controls controlled silicon conducting, and electromagnetic switch unit trips;
When line voltage is in normal condition, microprocessor exports release signal, and drive circuit controls controllable silicon cut-off, and electromagnetic switch unit closes a floodgate;
Described microprocessor is set with a delay time T, after the tripping operation of electromagnetic switch unit, recovers normal condition at line voltage, and after normal condition maintenance T time, microprocessor just exports release signal.
2. Self-recover overvoltage-undervoltage protection switch according to claim 1, is characterized in that:
Described microprocessor comprises a timing module, and described delay time T is set by timing module.
3. Self-recover overvoltage-undervoltage protection switch according to claim 1 and 2, is characterized in that:
The value of described delay time T is 20 seconds to 40 seconds.
4. Self-recover overvoltage-undervoltage protection switch according to claim 1 and 2, is characterized in that: the value of described delay time T is 30 seconds.
5. Self-recover overvoltage-undervoltage protection switch according to claim 1 and 2, is characterized in that: described pickup signal and release signal are pulse signal.
6. Self-recover overvoltage-undervoltage protection switch according to claim 1 and 2, is characterized in that: this Self-recover overvoltage-undervoltage protection switch also comprises working state indicating circuit, and described working state indicating circuit is connected with microprocessor.
7. Self-recover overvoltage-undervoltage protection switch according to claim 6, is characterized in that:
Described working state indicating circuit comprises normal condition indicator light and overvoltage or under-voltage condition indicator light;
When line voltage is in overvoltage or under-voltage condition, normal condition indicator light goes out, and overvoltage or under-voltage condition indicator light bright;
When line voltage is in normal condition, normal condition indicator light is bright, and overvoltage or under-voltage condition indicator light go out.
8. Self-recover overvoltage-undervoltage protection switch according to claim 1, is characterized in that: described microprocessor comprises one for judging whether line voltage is overvoltage or under-voltage judge module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520682761.XU CN204858521U (en) | 2015-09-02 | 2015-09-02 | Cross undervoltage protection switch from double entry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520682761.XU CN204858521U (en) | 2015-09-02 | 2015-09-02 | Cross undervoltage protection switch from double entry |
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| Publication Number | Publication Date |
|---|---|
| CN204858521U true CN204858521U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520682761.XU Active CN204858521U (en) | 2015-09-02 | 2015-09-02 | Cross undervoltage protection switch from double entry |
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| CN (1) | CN204858521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528241A (en) * | 2017-07-27 | 2017-12-29 | 杭州电力设备制造有限公司 | A kind of three pairs of cabinet spare powers and automatic switching method |
| CN108733113A (en) * | 2017-04-20 | 2018-11-02 | 硕天科技股份有限公司 | Apply the power supply output control module in electric power source distribution device |
-
2015
- 2015-09-02 CN CN201520682761.XU patent/CN204858521U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108733113A (en) * | 2017-04-20 | 2018-11-02 | 硕天科技股份有限公司 | Apply the power supply output control module in electric power source distribution device |
| CN107528241A (en) * | 2017-07-27 | 2017-12-29 | 杭州电力设备制造有限公司 | A kind of three pairs of cabinet spare powers and automatic switching method |
| CN107528241B (en) * | 2017-07-27 | 2024-05-28 | 杭州电力设备制造有限公司 | Three-double-cabinet spare power switching device and automatic switching method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191107 Address after: 528400, No. 68, No. six, Pok Oi Road, Eastern District, Guangdong, Zhongshan Patentee after: ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORPORATION Address before: 502, room 11, 528400 Sheng garden, east end, Zhongshan, Guangdong Co-patentee before: Liang Yu Patentee before: Li Liangtang Co-patentee before: Zhan Yinghua Co-patentee before: Li Ling |
|
| TR01 | Transfer of patent right |