CN101908752A - Overload protector - Google Patents
Overload protector Download PDFInfo
- Publication number
- CN101908752A CN101908752A CN 201010263006 CN201010263006A CN101908752A CN 101908752 A CN101908752 A CN 101908752A CN 201010263006 CN201010263006 CN 201010263006 CN 201010263006 A CN201010263006 A CN 201010263006A CN 101908752 A CN101908752 A CN 101908752A
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- Prior art keywords
- button
- electromagnet
- protective device
- resistance
- overload
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- 230000001012 protector Effects 0.000 title abstract 3
- 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 overcurrent protection device that especially a kind of accuracy is high.
Background technology
Overload protective device generally all is housed in the present home circuit; it is generally the blown fuse device; it is installed in the knife switch; be characterized in when electric current is excessive in family's electrical network; fuse fuses because of highly generating heat; yet; fuse needs to change again to connect circuit in case the back that fuses just can't be restored, and this just makes follow-up work become and very bothers; especially night; can't see the plug-in strip internal structure clearly after the power failure, be difficult to again fuse safety be connected, 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; electromagnetism swage dropout type circuit breaker; and both various distortion; both all can restore to the original state in the back of opening circuit; yet the former also makes sheet deformation disconnect main circuit by thermal effect, considers 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, the realization overload protection, yet; reach zero dividing value at electric current; armature will be in moving not moving state, and at this moment, the switch place is easy to generate 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 bigger, and secondly, above-mentioned overload protective device is difficult to be installed among ordinary family user's the junction box.
Summary of the invention
At 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 after opening circuit, restore to the original state easily; in addition, this overload protective device can also be installed among 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 the controlling resistance; the cathode terminal zero line side that gets access to grid behind the described electromagnet of connecting; described electromagnet and described button are coupled; and when electric current reaches overload zero dividing value in the assurance electromagnet, described button is disconnected.
As preferably; above-mentioned overload protective device, described shell wraps up other each parts except that button in it, and button is embedded on the described shell; and shell is provided with the metal wiring film that has screw hole, can be directly installed on the fuse installation place of common plug-in strip by this metal wiring film.
Beneficial effect of the present invention is: in this overload protective device; when electric current in the 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, rapidly button is disconnected in case energising can produce great magnetic; 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 press the button again and get final product; this overload protective device not only can reach when transshipping critical current by electric current in main circuit, accurately realizes open circuit protection, and can restore to the original state easily after opening circuit; in addition, this overload protective device can also be installed among the junction box of domestic consumer.
Description of drawings
Fig. 1 is the circuit structure diagram of this overload protective device.
Fig. 2 is the button in this overload protective device and the cooperation figure of electromagnet.
Among 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.
Among 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 the specific embodiment shown in Figure 2; this overload protective device comprises shell (among Fig. 1 shown in the frame of broken lines); 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 the controlling resistance 5; the cathode terminal zero line side 2 that gets access to grid behind the described electromagnet 7 of connecting; described electromagnet 7 is coupled with described button 8; and when guaranteeing that electric current reaches overload zero dividing value in the electromagnet 7, described button 8 is disconnected.
Above-mentioned overload protective device, the resistance of described controlling resistance 5 and divider resistance 9 equate that for guaranteeing the utilance of electric energy, 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; because in the one-period of alternating voltage; in the preceding half period; all there is electric current to pass through in controlling resistance 5 and the divider resistance 9; then in the half period; having only in the divider resistance 9 has electric current to flow through; so; critical overload current I is mean effective value that ac period is interior in the main circuit; if half interior electric current mean effective value of ac period is i in the controlling resistance 5; the pass that then 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 that button 8 in it; button 8 is embedded on the described shell, and shell is provided with the metal wiring film that has screw hole, can be directly installed on the fuse installation place of common plug-in strip by this metal wiring film.
Above-mentioned overload protective device; described electromagnet 7 comprises: coil (not marking among the 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; described coil is twined in the outside; 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 main circuit respectively; 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 backs and described button cap 84 concrete mutuallies; described neck 83 and inner bag 72 be by the projection and the coarse cooperation of depression on surface, and its frictional resistance is greater than the gravity of button 8, and suction this frictional resistance and button 8 gravity and during less than described electromagnet 7 energisings.
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 place, contact 81 places was attracted by electromagnet 7, armature 82 was shifted to electromagnet 7, and made 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; then when electric current in the 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 electric current reaches 9A in the main circuit; 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 the 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, thus thyristor 3 conductings made; electromagnet 7 energisings this moment; and, rapidly button 8 is disconnected in case energising can produce great magnetic; 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 press the button 8 again gets final product; this overload protective device not only can reach when transshipping critical current by electric current in main circuit, accurately realizes open circuit protection, and can restore to the original state easily after opening circuit; in addition, this overload protective device can also be installed among 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; 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 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 the controlling resistance (5); the cathode terminal zero line side (2) that gets access to grid behind the described electromagnet (7) of connecting; described electromagnet (7) is coupled with described button (8); and when guaranteeing that electric current reaches overload zero dividing value in the electromagnet (7), 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) is equal, and all below 2 Ω.
3. overload protective device according to claim 1 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 is characterized in that: described shell wraps up other each parts except that button (8) in it, and button (8) is embedded on the 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; described coil is twined in the outside; 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 main circuit respectively; 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) back and described button cap (84) concrete mutually; described neck (83) and inner bag (72) are by the 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 true CN101908752A (en) | 2010-12-08 |
| CN101908752B CN101908752B (en) | 2013-05-08 |
Family
ID=43264121
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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1310129A (en) * | 1970-06-03 | 1973-03-14 | Allenbradley Co | Overload protection circuit |
| JPS578350A (en) * | 1980-06-19 | 1982-01-16 | Honda Motor Co Ltd | Overvoltage preventive device for engine driven generator |
| 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 |
-
2010
- 2010-08-26 CN CN 201010263006 patent/CN101908752B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1310129A (en) * | 1970-06-03 | 1973-03-14 | Allenbradley Co | Overload protection circuit |
| JPS578350A (en) * | 1980-06-19 | 1982-01-16 | Honda Motor Co Ltd | Overvoltage preventive device for engine driven generator |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101908752B (en) | 2013-05-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
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 |