CN103426699B - A kind of overcurrent protector of safety sensitive - Google Patents
A kind of overcurrent protector of safety sensitive Download PDFInfo
- Publication number
- CN103426699B CN103426699B CN201310342408.2A CN201310342408A CN103426699B CN 103426699 B CN103426699 B CN 103426699B CN 201310342408 A CN201310342408 A CN 201310342408A CN 103426699 B CN103426699 B CN 103426699B
- Authority
- CN
- China
- Prior art keywords
- reed
- circuit
- tongue tube
- current coil
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2445—Electromagnetic mechanisms using a reed switch
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses the overcurrent protector of a kind of safety sensitive in the safety guard field being used in circuit, comprise insulation shell and be placed in inductive means and the signal component of insulation shell inside, this signal component is also connected with execution unit, described execution unit is made up of normally closed type trip gear, this trip gear comprises normally closed switch and performs trigger member, described inductive means is made up of current coil, this signal component is made up of tongue tube open in usual, tongue tube comprises the parallel magnetizable reed in two panels end points place and the packaging container for encapsulating reed, tongue tube is penetrated in current coil.Tongue tube is serially connected with circuit through current coil, makes the electric current flowing through current coil change the magnetic field produced and carry out conducting tongue tube, thus the safety of realizing circuit disconnects; It has again the features such as anti-loading impact capacity is strong, volume is little, lightweight, low price, precision are high, reaction speed is fast, has ensured the person and property safety.
Description
Technical field
The present invention relates to the safety guard field being used in circuit, be specifically related to a kind of overcurrent protector of safety sensitive.
Background technology
When there is overcurrent or short circuit phenomenon in circuit, should take measures timely to cut off circuit, otherwise easily making the equipment in circuit break down, even there will be fire safety evaluating accident.In order to cut off circuit timely, people adopt earth leakage protective device and air switch usually, and air switch is exactly utilize air as the switch of the medium of arc extinguishing, and its advantage is cheap, and use extensively, technology maturation, breaking current is large; Earth leakage protective device; in fact be exactly on the basis of general automatic air-break switch; add zero sequence current mutual inductor and leakage tripping device to detect drain conditions; but the shortcoming of two kinds of switch existence is that arc quenching effect is slightly poor; arcing time is longer; can not cut off circuit rapidly in time, air switch generally performs 1.7 times that electric current is rated current in the case of an overload, performs 10 times that electric current is rated current when short circuit.The more important thing is that general air switch controls many branch roads; the protective current value of setting is also larger than the summation of each branch road; really can not protect the safety of each branch road; but too little meeting is often tripped; impact is normal to be used; contradiction is there is between normal use and safety; can not realize protecting one to one; will burn fast electrocute as human body flows through big current; fail to avoid the person to be endangered, be not enough to ensure the personal safety of operator and the safe power-off of electric equipment with the reaction time of air switch and earth leakage protective device.
Summary of the invention
The object of the invention is to solve above defect, there is provided a kind of volume little, lightweight, be applicable to switch on wall, wall socket, insert, socket, the electrical equipment external connection apparatus such as air switch, also be applicable to various domestic electric appliance inner simultaneously, improve the opening speed when fault such as short circuit or overcurrent appears in circuit because and reaction precision, the reliability making it devote oneself to work is higher.
The object of the invention is to realize in the following manner:
A kind of overcurrent protector of safety sensitive, comprise insulation shell and be placed in inductive means and the signal component of insulation shell inside, this signal component is also connected with execution unit, described execution unit is made up of normally closed type trip gear, this trip gear comprises normally closed switch and performs trigger member, described inductive means is made up of current coil, the wire at current coil two ends is welded with two induction pins toward extension, induction pin is directly plugged in the pin bores of pcb board, induction pin is for being connected in series input circuit, loop inductance is formed with other energized components with the normally closed switch of trip gear, described trip gear is the device that relay etc. can cut off normally closed switch circuit.This signal component is made up of tongue tube open in usual, tongue tube comprises the parallel magnetizable reed in two panels end points place and the packaging container for encapsulating reed, inert gas is filled with in packaging container, two reed end points are provided with contact, contact separation leaves gap makes two reeds be normal opening structure, the two ends of tongue tube are welded with two signal pins by the lead-out wire of two panels reed, signal pins is connected in series with the execution trigger member of trip gear, tongue tube is connected in series with execution trigger member and forms signal circuit, tongue tube is penetrated in current coil, when there is abnormal short circuit or overcurrent in the loop inductance of input circuit, the operating current of flowing through coil changes, the electric current of change makes coil produce magnetic field, magnetic field produces magnetic field force, magnetic field with the change of electric current increase to perform intensity time, magnetic field makes to produce different polarity near two panels reed endpoint location, the contact of reed will be attracted by the attraction in magnetic field, when attraction is greater than the elastic force of reed, to attract each other and close in the contact of the reed of result two panels opposed polarity, signal circuit is connected by the reed after closed, execution trigger member is energized thus the normally closed switch of triggering trip gear does disconnection execution, the loop inductance of input circuit is made to perform disconnection.Because tongue tube reaction speed is high, functional reliability is very high, ensures that the life safety of circuit operation person and circuit appliance are not burnt out by overcurrent.
Further, described tongue tube passes perpendicularly through current coil, by the execution electric current regulating the Distance geometry position between tongue tube and current coil to set overcurrent protector.Size due to magnetic field determines that the reed of tongue tube is attracted each other closed reaction speed; magnetic field is larger; reed closed reaction speed of attracting each other is faster; magnetic field is directly proportional to the size of current flowing through current coil simultaneously, and the electric current namely flowing through current coil is larger, and magnetic field intensity is larger; thus reed attracts the reaction speed that closes faster mutually; therefore, also can adjust magnetic field size by the size and the number of turns regulating current coil simultaneously, thus the execution electric current of accurate alignment protector.
Further, the bearing of trend of described induction pin is identical with the bearing of trend of signal pins, and induction pin and signal pins are plugged on same pcb board jointly, two pairs of pin staggered decussate textures.
Further, described contact is rhodanizing contact or silver-plated contact, and rhodanizing contact the most often uses, and this contact has highly stable operating characteristic and very long working life from underload to heavy load, this is because rhodium has the performance of high-melting-point and high rigidity.
Further, described packaging container is the various containers for sealing such as glass tube or plastic pipe.
Further, described trip gear is the various devices that can cut off circuit such as electronic switch, electromagnetic relay, A.C. contactor, solid-state relay body.
Further, described execution trigger member is magnetic coil.
Overcurrent protector of the present invention can arrange multiple rated current specification; it is made to be widely used in various electrical equipment; as the refrigeration of family expenses, for warm kitchen appliance or plant and equipment; the front end of the end of incoming cables of each electrical equipment is arranged on during use; every platform power consumption equipment is protected one to one; can fast cut-off circuit when there is overcurrent, ensure the safety of the person and property.
Described trip gear is normally closed type trip gear, as all device or devices performing power-off such as electronic switch, relay, A.C. contactor, solid-state relays.Trip gear is a kind of device being produced predetermined response by the relative motion of mechanical part, it comprises execution trigger member and normally-closed contact, wherein perform trigger member to be connected in series with tongue tube, normally-closed contact and current coil are serially connected with circuit, described normally closed type refers to and trip gear is provided with normally-closed contact, closure state is in when not performing, off-state is in after execution, when the electric current flowed through in current coil reaches preset value, magnetic field will be produced, magnetic field force makes tongue tube adhesive, thus drive execution trigger member to obtain electric, produce executive signal, normally-closed contact is finally made to perform disconnection fast.
Overcurrent protector of the present invention has the features such as volume is little, lightweight, low price, precision are high, reaction speed is fast; be not only applicable to switch on wall, wall socket, insert, socket, the electrical equipment external connection apparatus such as air switch; also be applicable to various domestic electric appliance inner simultaneously; current protection value is set as the rated current of being a bit larger tham each electrical appliance; thus achieve and protect one to one, solve the normal contradiction used between safety.When using electric fault, just fault branch part power-off, does not affect the normal use of other circuit, very convenient, effectively can identify faulty circuit simultaneously, facilitate repair and maintenance, not only easy to use and abort situation is very clear.The milestone promoting the use of and be electrical industry of this product.
The beneficial effect that the present invention produces is: compare with leakage switch with traditional air switch; tradition rated current is the air switch of 16A is example: when electric current is 30A; need ability open circuit after lasting 17 seconds, when electric current is 20A, need ability open circuit after lasting 32 seconds; Overcurrent protector of the present invention, when setting rated current is 16A, it reacts precision 0.02A, and that is its cut off value is at 15.98A-16.02A, and its time disconnecting reaction only needs 0.07 ± 0.01 second.Structure of the present invention is simple, and tongue tube is serially connected with circuit through current coil, coordinates trip gear work, makes the electric current flowing through current coil change the magnetic field produced and carry out conducting tongue tube, thus the safety of realizing circuit disconnects, because the dry reed-pipe structure used is simple, volume is little, closing speed is fast, long working life, and compared with electronic switch, it has again the features such as anti-loading impact capacity is strong, functional reliability is very high, various power consumption equipment can be used for, improve the opening speed when fault such as short circuit or overcurrent appears in circuit because and improve reaction precision, ensure the person and the property safety of operator, it is applicable to switch on wall simultaneously, wall socket, insert, socket, the electrical equipment external connection apparatus such as air switch, also be applicable to various domestic electric appliance inner simultaneously, current protection value is set as the rated current of being a bit larger tham each electrical appliance, thus achieve and protect one to one, solve the normal contradiction used between safety.
Accompanying drawing explanation
Fig. 1 is the structural representation of overcurrent protector of the present invention;
Fig. 2 is the schematic internal view of overcurrent protector of the present invention;
Fig. 3 is the circuit diagram of overcurrent protector of the present invention in circuit uses;
In figure, (1) current coil, (2) induction pin, (3) tongue tube, (4) reed, (5) packaging container, (6) contact, (7) signal pins, (8) insulation shell, (9) normally closed switch of relay, (10) trigger member is performed, (11) inductive load, (12) light-emitting diode, (13) rectifier diode, (14) current-limiting resistance.
Embodiment
The operation principle of tongue tube of the present invention is as follows: two panels end points place overlap magnetizable reed, be sealed in a packaging container, distance only about several micron that two reeds are separated, highly purified inert gas is filled with in packaging container, when not yet operating, two panels reed does not contact, additional magnetic field makes to produce different polarity near two panels reed endpoint location, and the reed of result two panels opposed polarity will be attracted each other and close.Technology can make the changeover module of very reduced size volume according to this, and switch speed very fast and have very excellent reliability.The orientation in magnetic field and direction determine when and how many times switch opens and closedown.
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
The present embodiment, see figures.1.and.2, a kind of overcurrent protector of safety sensitive, comprise insulation shell 8 and be placed in inductive means and the signal component of insulation shell 8 inside, this signal component is also connected with execution unit, described execution unit is made up of normally closed type trip gear, this trip gear comprises normally closed switch and performs trigger member, normally closed switch is connected to main circuit, described inductive means is made up of current coil 1, the current coil 1 of the present embodiment is wound with a circle, its electrified wire cross-sectional area used is larger, its electric current that can flow through is larger, the wire at current coil 1 two ends is welded with two induction pins 2 toward extension, induction pin 2 is directly plugged in the pin bores of pcb board.This signal component is made up of tongue tube 3 open in usual, tongue tube 3 comprises the parallel magnetizable reed 4 in two panels end points place and the packaging container 5 for encapsulating reed 4, inert gas is filled with in packaging container 5, its inert gas used is nitrogen or helium, described packaging container is glass tube, two reed 4 end points are provided with contact 6, contact 6 separation leaves gap makes two reeds 4 be normal opening structure, the two ends of tongue tube 3 are welded with two signal pins 7 by the lead-out wire of two panels reed 4, signal pins 7 is directly plugged in the pin bores of pcb board, tongue tube 3 is penetrated in current coil 1, tongue tube 3 passes perpendicularly through current coil 1, by the execution current value regulating the Distance geometry position between tongue tube 3 and current coil 1 to set overcurrent protector.Size due to magnetic field determines that the reed 4 of tongue tube 3 is attracted each other closed reaction speed; magnetic field is larger; reed 4 closed reaction speed of attracting each other is faster; magnetic field is directly proportional to the size of current flowing through current coil 1 simultaneously; namely the electric current flowing through current coil 1 is larger; magnetic field intensity is larger; thus reed 4 phase attracts closed reaction speed faster; therefore; also can adjust magnetic field size by the size and the number of turns regulating current coil 1 simultaneously, thus the execution current value of accurate alignment protector.
With reference to Fig. 3, be serially connected with in circuit by the overcurrent protector of the present embodiment, this circuit comprises relay, inductive load 11, light-emitting diode 12, rectifier diode 13 and current-limiting resistance 14, and light-emitting diode can be used as tripping operation indicator light.Current coil 1 is serially connected with in circuit by induction pin 2, loop inductance is formed with other energized components with the normally closed switch 9 of the relay of circuit, tongue tube 3 is connected in series with the execution trigger member 10 of circuit relay electrical equipment by signal pins 7, tongue tube 3 is connected in series with execution trigger member 10 and forms signal circuit.When there is abnormal short circuit or overcurrent in certain the part energized components in the loop inductance of circuit, the operating current of flowing through coil changes, the electric current of change makes coil produce magnetic field, magnetic field produces magnetic field force, magnetic field with the change of electric current increase to perform intensity time, magnetic field makes to produce different polarity near two panels reed 4 endpoint location, the contact 6 of reed 4 will be attracted by the attraction in magnetic field, when attraction is greater than the elastic force of reed 4, to attract each other and close in the contact 6 of the reed 4 of result two panels opposed polarity, signal circuit is connected by the reed 4 after closed, perform trigger member 10 to be energized thus the disconnection of the normally closed switch 9 of trigger relay execution, the loop inductance of circuit is disconnected, because tongue tube 3 reaction speed is high, functional reliability is very high, ensure that life safety and the circuit appliance of circuit operation person are not burnt out by overcurrent.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as protection scope of the present invention.
Claims (1)
1. the overcurrent protector of a safety sensitive, it is characterized in that: comprise insulation shell and be placed in inductive means and the signal component of insulation shell inside, this signal component is also connected with execution unit, described execution unit is made up of normally closed type trip gear, this trip gear comprises normally closed switch and performs trigger member, described inductive means is made up of current coil, the wire at current coil two ends is welded with two induction pins toward extension, induction pin is used for serial connection and is input to circuit, loop inductance is formed with other energized components in the normally closed switch of trip gear and circuit, this signal component is made up of tongue tube open in usual, tongue tube comprises the parallel magnetizable reed in two panels end points place and the packaging container for encapsulating reed, inert gas is filled with in packaging container, two reed end points are provided with contact, contact separation leaves gap makes two reeds be normal opening structure, the two ends of tongue tube are welded with two signal pins by the lead-out wire of two panels reed, signal pins is connected in series with the execution trigger member of trip gear, tongue tube is connected in series with execution trigger member and forms signal circuit, tongue tube is penetrated in current coil, when there is abnormal short circuit or overcurrent in the loop inductance being input to circuit, the operating current flowing through current coil changes, the electric current of change makes current coil produce magnetic field, when magnetic field increases to and performs intensity, magnetic field makes to produce different polarity near two panels reed endpoint location, the contact of reed will be attracted by the attraction in magnetic field, when attraction is greater than the elastic force of reed, to attract each other and close in the contact of the reed of result two panels opposed polarity, signal circuit is connected by the reed after closed, execution trigger member is energized thus the normally closed switch of triggering trip gear does disconnection execution, the loop inductance being input to circuit is made to perform disconnection, described tongue tube passes perpendicularly through current coil, the bearing of trend of described induction pin is identical with the bearing of trend of signal pins, described contact is rhodanizing contact or silver-plated contact, described packaging container is glass tube or plastic pipe, described trip gear inside comprises execution trigger member and normally-closed contact, normally-closed contact and current coil are serially connected with circuit realiration normally closed type, the normally-closed contact of described normally closed type by described trip gear is arranged, closure state is in when not performing, off-state is in after execution, when the electric current flowed through in current coil reaches preset value, magnetic field will be produced, magnetic field force makes tongue tube adhesive, thus drive execution trigger member to obtain electric, produce executive signal, normally-closed contact is finally made to perform disconnection fast, described execution trigger member is magnetic coil.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310342408.2A CN103426699B (en) | 2013-08-08 | 2013-08-08 | A kind of overcurrent protector of safety sensitive |
| PCT/CN2014/000714 WO2015018180A1 (en) | 2013-08-08 | 2014-07-28 | Safe and sensitive over-current protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310342408.2A CN103426699B (en) | 2013-08-08 | 2013-08-08 | A kind of overcurrent protector of safety sensitive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103426699A CN103426699A (en) | 2013-12-04 |
| CN103426699B true CN103426699B (en) | 2015-12-23 |
Family
ID=49651289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310342408.2A Expired - Fee Related CN103426699B (en) | 2013-08-08 | 2013-08-08 | A kind of overcurrent protector of safety sensitive |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103426699B (en) |
| WO (1) | WO2015018180A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426699B (en) * | 2013-08-08 | 2015-12-23 | 东莞市兆南电子电器科技有限公司 | A kind of overcurrent protector of safety sensitive |
| CN106099840A (en) * | 2016-08-15 | 2016-11-09 | 珠海格力电器股份有限公司 | The protection circuit of a kind of power circuit and power circuit |
| CN110888012A (en) * | 2019-12-11 | 2020-03-17 | 国网河南省电力公司新乡供电公司 | Lightning arrester monitoring system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2184209Y (en) * | 1993-07-02 | 1994-11-30 | 张敬诚 | Automatic fee collecting safety power meter |
| CN2311855Y (en) * | 1997-09-12 | 1999-03-24 | 沈福年 | Anti-mistrip overcurrent protection controller |
| US6433698B1 (en) * | 1998-04-30 | 2002-08-13 | E.O. Schweitzer Mfg. Co. | Fault indicator providing light indication on fault detection |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2057038U (en) * | 1989-09-25 | 1990-05-09 | 浙江省平阳县敖江电子技术中心仪器厂 | Multifuncitonal protector for limiting consumption of electricity, over-current, leakage and avoiding or indicating fraudulent use of electricity |
| CN2185480Y (en) * | 1994-01-06 | 1994-12-14 | 刘在能 | Protector for overcurrent and short circuit of load |
| CN100336147C (en) * | 2004-12-15 | 2007-09-05 | 李弦 | Electromagnetic induction relay and protective relay device composed thereby |
| US20060232366A1 (en) * | 2005-04-15 | 2006-10-19 | Jianshing Li | Over-current actuated reed relay and electrical outlet incorporating the same for providing over-current alarm |
| US7920038B1 (en) * | 2008-05-20 | 2011-04-05 | Keithley Instruments, Inc. | Dual shielded relay |
| CN103426699B (en) * | 2013-08-08 | 2015-12-23 | 东莞市兆南电子电器科技有限公司 | A kind of overcurrent protector of safety sensitive |
-
2013
- 2013-08-08 CN CN201310342408.2A patent/CN103426699B/en not_active Expired - Fee Related
-
2014
- 2014-07-28 WO PCT/CN2014/000714 patent/WO2015018180A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2184209Y (en) * | 1993-07-02 | 1994-11-30 | 张敬诚 | Automatic fee collecting safety power meter |
| CN2311855Y (en) * | 1997-09-12 | 1999-03-24 | 沈福年 | Anti-mistrip overcurrent protection controller |
| US6433698B1 (en) * | 1998-04-30 | 2002-08-13 | E.O. Schweitzer Mfg. Co. | Fault indicator providing light indication on fault detection |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015018180A1 (en) | 2015-02-12 |
| CN103426699A (en) | 2013-12-04 |
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