CN101908752B - Overload protector - Google Patents
Overload protector Download PDFInfo
- Publication number
- CN101908752B CN101908752B CN 201010263006 CN201010263006A CN101908752B CN 101908752 B CN101908752 B CN 101908752B CN 201010263006 CN201010263006 CN 201010263006 CN 201010263006 A CN201010263006 A CN 201010263006A CN 101908752 B CN101908752 B CN 101908752B
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- Prior art keywords
- button
- electromagnet
- protective device
- overload
- resistance
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- 230000001012 protector Effects 0.000 title abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000012467 final product Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000368 destabilizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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Abstract
The invention provides an overload protector comprising a shell, a thyristor, a diode, a control resistor, an electromagnet, a button and a divider resistor, wherein the diode is connected in series with the control resistor and then connected in parallel with the divider resistor and then connected in series with the button; the diode anode end of a circuit is connected with the live wire end of a power grid; the button end of the circuit is connected with the zero line of the power grid; besides, the anode end of the thyristor is connected with the live wire end of the power grid, and the control end of the thyristor is connected between the diode and the control resistor, and the cathode end is connected in series with the electromagnet and then connected with the zero line of the power grid; and the electromagnet is coupled with the button and ensures that the button is disconnected when the current of the electromagnet reaches an overload zero bound value. The overload protector can not only accurately realize open circuit protection when the current of a main circuit reaches overload critical current, but also be conveniently restored after open circuit.
Description
Affiliated technical field
The present invention relates to power domain, the high current over-load protector of especially a kind of accuracy.
Background technology
overload protective device generally all is housed in present home circuit, it is generally the blown fuse device, it is installed in knife switch, be characterized in when in family's electrical network, electric current is excessive, fuse fuses because highly generating heat, yet, fuse is in case just can't restore after fusing, need again to change to connect circuit, this just makes follow-up work become and very bothers, especially night, can't see the plug-in strip internal structure clearly after power failure, be difficult to again fuse be connected safely, in addition, consider the problems such as heat radiation of fuse, in fact the concrete numerical value inaccuracy very of its overload blowout current.
in addition, in the higher industrial equipment of ask for something, the overload protective device that adopts mainly contains thermal relay, electromagnet type trip circuit breakage current device, and both various distortion, both all can restore to the original state after opening circuit, yet, the former also makes sheet deformation disconnect main circuit by thermal effect, consider the heat radiation destabilizing factor of sheet metal, the overload current accuracy of its open circuit protection is not high, the latter directly attracts armature to disconnect main circuit by electromagnet, realize overload protection, yet, when electric current reaches the overload critical current, armature will be in moving not moving state, at this moment, the switch place easily produces arc phenomenon.And the mechanical motion pair that two kinds of above-mentioned overload protective devices relate to is more, therefore, considers from mechanical configuration aspects, also is difficult to the accuracy that reaches larger, and secondly, above-mentioned overload protective device is difficult to be arranged in ordinary family user's junction box.
Summary of the invention
For the problems referred to above; the object of the present invention is to provide a kind of overload protective device; this overload protective device not only can reach when transshipping critical current by electric current in main circuit; accurately realize open circuit protection; and can restore to the original state easily after opening circuit; in addition, this overload protective device can also be installed in the junction box of domestic consumer.
the technical solution adopted for the present invention to solve the technical problems is: this overload protective device comprises shell, thyristor, diode, controlling resistance, electromagnet, button, divider resistance, described diode is with in parallel with described divider resistance again after described controlling resistance is connected, and then the described button of connecting, the diode anode termination electrical network live wire end of aforementioned circuit, circuit button termination electrical network zero line side, in addition, the anode tap of the described thyristor live wire end that gets access to grid, control end is connected in the middle of described diode and controlling resistance, zero line side gets access to grid after the described electromagnet of cathode terminal series connection, described electromagnet and described button are coupled, and when in the assurance electromagnet, electric current reaches the overload critical value, described button is disconnected.
As preferably; above-mentioned overload protective device, described shell wraps up other each parts except button in it, and button is embedded on described shell; and shell is provided with the metal wiring film that has screw hole, can be directly installed on by this metal wiring film the fuse installation place of common plug-in strip.
beneficial effect of the present invention is: in this overload protective device, when electric current in main circuit reaches the overload critical value, positive half period at alternating voltage, electric current flows through controlling resistance and divider resistance simultaneously, and in the generation voltage drop of their two ends, that is critical potential is poor, thereby make the thyristor conducting, electromagnet energising this moment, and in case energising, can produce great magnetic, rapidly button is disconnected, in common electromagnet type relay switch, the situation that electromagnet magnetic increases gradually, the action of this overload protective device is more accurate, rapidly, during recovery, only need again press the button and get final product, this overload protective device not only can reach when transshipping critical current by electric current in main circuit, accurately realize open circuit protection, and can restore to the original state easily after opening circuit, in addition, this overload protective device can also be installed in the junction box of domestic consumer.
Description of drawings
Fig. 1 is the circuit structure diagram of this overload protective device.
Fig. 2 is button in this overload protective device and the cooperation figure of electromagnet.
In Fig. 1: 1, the live wire end; 2, zero line side; 3, thyristor; 4, diode; 5, controlling resistance; 7, electromagnet; 8, button; 9, divider resistance.
In Fig. 2: 71, iron core; 72, inner bag; 81, contact; 82, armature; 83, neck; 84; Button cap.
Embodiment
The present invention is further described below in conjunction with Fig. 1, Fig. 2 and embodiment:
at Fig. 1, in specific embodiment shown in Figure 2, this overload protective device comprises shell (in Fig. 1 shown in the dotted line frame), thyristor 3, diode 4, controlling resistance 5, electromagnet 7, button 8, divider resistance 9, described diode 4 is with in parallel with described divider resistance 9 again after described controlling resistance 5 is connected, and then the described button 8 of connecting, diode 4 anode taps of the aforementioned circuit live wire end 1 that gets access to grid, circuit button 8 termination electrical network zero line sides 2, in addition, the anode tap of the described thyristor 3 live wire end 1 that gets access to grid, control end is connected in the middle of described diode 4 and controlling resistance 5, zero line side 2 gets access to grid after the described electromagnet 7 of cathode terminal series connection, described electromagnet 7 is coupled with described button 8, and when guaranteeing that in electromagnet 7, electric current reaches the overload critical value, described button 8 is disconnected.
Above-mentioned overload protective device, the resistance of described controlling resistance 5 and divider resistance 9 equate, are the utilance of assurance electric energy, and desirable less resistance is generally below 2 Ω.
above-mentioned overload protective device, the turn-on voltage that brings out of described thyristor 3 control ends is got the value of critical overload current 2/3rds and the product of described controlling resistance 5, its basis is as follows: establishing critical overload current is I, due in the one-period of alternating voltage, in front half period, there is electric current to pass through in controlling resistance 5 and divider resistance 9, then in half period, only having in divider resistance 9 has electric current to flow through, so, critical overload current I is mean effective value that ac period is interior in main circuit, if in controlling resistance 5, half interior electric current mean effective value of ac period is i, the pass that can draw i and I is: (i+i+i+0)/2=I, i=2I/3.
Above-mentioned overload protective device; described shell wraps up other each parts except button 8 in it; button 8 is embedded on described shell, and shell is provided with the metal wiring film that has screw hole, can be directly installed on by this metal wiring film the fuse installation place of common plug-in strip.
above-mentioned overload protective device, described electromagnet 7 comprises: coil (not marking in figure), iron core 71, inner bag 72, described button 8 comprises: contact 81, armature 82, neck 83, button cap 84, described iron core 71 is cylindric, the outside is wound around described coil, inside is provided with described inner bag 72, the contact 81 of described button 8 is four metal bump, two live wire end and zero line sides that connect respectively main circuit, two other is at the two ends of described armature 82, and guarantee that armature 82 can switch on and off main circuit in moving process, described armature 82 is arranged on an end of described neck 83, this neck 83 is the insulation material, its other end passes described electromagnet 7 afterwards and described button cap 84 concrete mutuallies, described neck 83 and inner bag 72 are by projection and the coarse cooperation of depression on surface, its frictional resistance is greater than the gravity of button 8, and suction this frictional resistance and button 8 gravity and during less than 7 energising of described electromagnet.
Above-mentioned overload protective device, when described button cap 84 was pressed, described each contact 81 contacted, and main circuit is switched on, and when the armature 82 at contact 81 places places was attracted by electromagnet 7, armature 82 was shifted to electromagnet 7, and makes each contact 81 separately, and main circuit is disconnected.
Above-mentioned overload protective device, as suppose that the critical overload current of its design is 9A, and the resistance of described controlling resistance 5 and divider resistance 9 is 1 Ω; when electric current in main circuit during less than 9A, controlling resistance 5 both end voltage are less than 6V, and thyristor 3 disconnects; electromagnet 7 is no power also, and is nonmagnetic, when in main circuit, electric current reaches 9A; controlling resistance 5 both end voltage reach 6V; bring out thyristor 3 and connect, electromagnet 7 is also switched on, and electrical current is near 9A; moment produces very big suction, and button 8 is disconnected.
in above-mentioned overload protective device, when electric current in main circuit reaches the overload critical value, positive half period at alternating voltage, electric current flows through controlling resistance 5 and divider resistance 9 simultaneously, and in the generation voltage drop of their two ends, that is critical potential is poor, thereby make thyristor 3 conductings, electromagnet 7 energisings this moment, and in case energising, can produce great magnetic, rapidly button 8 is disconnected, in common electromagnet type relay switch, the situation that electromagnet magnetic increases gradually, the action of this overload protective device is more accurate, rapidly, during recovery, only need again press the button 8 gets final product, this overload protective device not only can reach when transshipping critical current by electric current in main circuit, accurately realize open circuit protection, and can restore to the original state easily after opening circuit, in addition, this overload protective device can also be installed in the junction box of domestic consumer.
Claims (5)
1. overload protective device, comprise shell, electromagnet (7), button (8), it is characterized in that: this overload protective device also comprises thyristor (3), diode (4), controlling resistance (5), divider resistance (9), described diode (4) is with in parallel with described divider resistance (9) again after described controlling resistance (5) is connected, and then the described button (8) of connecting, the diode of aforementioned circuit (4) the anode tap live wire end (1) that gets access to grid, circuit button (8) termination electrical network zero line side (2), in addition, the anode tap of described thyristor (3) the live wire end (1) that gets access to grid, control end is connected in the middle of described diode (4) and controlling resistance (5), zero line side (2) gets access to grid after the cathode terminal described electromagnet of series connection (7), described electromagnet (7) is coupled with described button (8), and when guaranteeing that in electromagnet (7), electric current reaches the overload critical value, described button (8) is disconnected.
2. overload protective device according to claim 1 is characterized in that: the resistance of described controlling resistance (5) and divider resistance (9) equates, and all below 2 Ω.
3. overload protective device according to claim 1, it is characterized in that: the turn-on voltage that brings out of described thyristor (3) control end is got the value of critical overload current 2/3rds and the product of described controlling resistance (5).
4. overload protective device according to claim 1, it is characterized in that: described shell wraps up other each parts except button (8) in it, and button (8) is embedded on described shell, and shell is provided with the metal wiring film that has screw hole.
5. overload protective device according to claim 1, it is characterized in that: described electromagnet (7) comprising: coil, iron core (71), inner bag (72), described button (8) comprising: contact (81), armature (82), neck (83), button cap (84), described iron core (71) is cylindric, the outside is wound around described coil, inside is provided with described inner bag (72), the contact (81) of described button (8) is four metal bump, two live wire end and zero line sides that connect respectively main circuit, two other is at the two ends of described armature (82), and guarantee that armature (82) can switch on and off main circuit in moving process, described armature (82) is arranged on an end of described neck (83), this neck (83) is the insulation material, its other end passes described electromagnet (7) afterwards and described button cap (84) concrete mutually, described neck (83) and inner bag (72) are by projection and the coarse cooperation of depression on surface, its frictional resistance is greater than the gravity of button (8), and suction this frictional resistance and button (8) gravity and when switching on less than described electromagnet (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010263006 CN101908752B (en) | 2010-08-26 | 2010-08-26 | Overload protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010263006 CN101908752B (en) | 2010-08-26 | 2010-08-26 | Overload protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101908752A CN101908752A (en) | 2010-12-08 |
| CN101908752B true CN101908752B (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010263006 Expired - Fee Related CN101908752B (en) | 2010-08-26 | 2010-08-26 | Overload protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101908752B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509963A (en) * | 2011-11-03 | 2012-06-20 | 深圳莱克斯特电气有限公司 | Internet of things power saving protection and control system |
| CN102496813A (en) * | 2011-11-03 | 2012-06-13 | 深圳莱克斯特电气有限公司 | Novel measuring, electricity-saving and protective control system |
| CN106340754A (en) * | 2016-10-17 | 2017-01-18 | 成都尚智恒达科技有限公司 | Anti-overloading combustion-proof socket |
| CN112241191A (en) * | 2020-09-16 | 2021-01-19 | 北京伟仕天成科技有限公司 | Novel power module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1310129A (en) * | 1970-06-03 | 1973-03-14 | Allenbradley Co | Overload protection circuit |
| CN2149044Y (en) * | 1992-12-17 | 1993-12-08 | 徐杞宪 | Protective switch for overload, short circuit, overvoltage and leakage |
| CN1558480A (en) * | 2004-02-02 | 2004-12-29 | 杨季民 | Excess voltage control module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578350A (en) * | 1980-06-19 | 1982-01-16 | Honda Motor Co Ltd | Overvoltage preventive device for engine driven generator |
-
2010
- 2010-08-26 CN CN 201010263006 patent/CN101908752B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1310129A (en) * | 1970-06-03 | 1973-03-14 | Allenbradley Co | Overload protection circuit |
| CN2149044Y (en) * | 1992-12-17 | 1993-12-08 | 徐杞宪 | Protective switch for overload, short circuit, overvoltage and leakage |
| CN1558480A (en) * | 2004-02-02 | 2004-12-29 | 杨季民 | Excess voltage control module |
Non-Patent Citations (1)
| Title |
|---|
| JP昭57-8350A 1982.01.16 |
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| Publication number | Publication date |
|---|---|
| CN101908752A (en) | 2010-12-08 |
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| C14 | Grant of patent or utility model | ||
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Owner name: WUZHI ELECTRIC INDUSTRIES CORPORATION HENAN FEIJIN Effective date: 20140414 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: HENAN FEIJING ELECTRICAL CO., LTD. Effective date: 20140414 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 454950 JIAOZUO, HENAN PROVINCE TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140414 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Wuzhi Electric Power Corporation Patentee after: Henan Feijing Electrical Co., Ltd. Address before: The western part of Wuzhi County, Henan province Henan Longyuan 454950 amorphous Electric Co. Ltd. Patentee before: Henan Feijing Electrical Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20150826 |
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| EXPY | Termination of patent right or utility model |