CN1856856A - Short-circuit and overload release for a switchgear - Google Patents
Short-circuit and overload release for a switchgear Download PDFInfo
- Publication number
- CN1856856A CN1856856A CNA2004800248069A CN200480024806A CN1856856A CN 1856856 A CN1856856 A CN 1856856A CN A2004800248069 A CNA2004800248069 A CN A2004800248069A CN 200480024806 A CN200480024806 A CN 200480024806A CN 1856856 A CN1856856 A CN 1856856A
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- CN
- China
- Prior art keywords
- switchgear
- piezoelectric transducer
- piezo
- activator
- overload
- 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.)
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- 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
- H01H71/127—Automatic release mechanisms with or without manual release using piezoelectric, electrostrictive or magnetostrictive trip units
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- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
Abstract
Switchgears wherein piezoelectric converters have the function of an actuator are known. According to the invention, a magnetic actuator (5) is associated with the piezoelectric converter (11) as an actuator for unlocking the switch latch (10), in order to provide an overload and short-circuit protection. The piezoelectric converter (11) can be used in conjunction with the solenoid as a sensor for determining the circulating flow.
Description
The present invention relates to a kind of short circuit and overload release that is used for switchgear, wherein said switchgear comprises that one can be provided with a piezoelectric transducer by the switch lock of piezo-activator dropout for this reason.
Piezo-activator is suitable for overload release in the power switch in conjunction with flow measurement device and electronic processing unit.At this, it has substituted the bimetallic release of conventional power switch, and directly acts on switch lock in the mode that is similar to this bimetallic release.At this, electronic processing unit is transfused to the signal of the electric current that an expression flows through.In order to measure this electric current, need an independent image current transducer or the current sensor of analog.Based on itself just method and rule, this electronic processing unit calculates overload when occurs.By this electronic processing unit, this overlond trip unit has the regulatory region that a quilt obviously enlarges, and that is to say, nominal current and the electric current that is regarded as in addition thus transshipping can be changed in wide boundary by the user, and are complementary with applicable cases thus.
Usually adopt magnetic actuator as short-circuit release in the switchgear of machinery, this magnetic actuator flows through electric current, and impels switch lock to thread off by the magnetic machinery ground that causes thus under the situation of short circuit, thereby impels disconnection.
US 4042967A for example discloses the employing piezo-activator in advance and has disconnected ground connection.Here, piezo-activator is directly controlled by an electronic installation under short-circuit conditions, and impels disconnection apace under short-circuit conditions thus.
But the power switch that does not also openly have piezo-activator so far is as closing the actual product of symbol.Have on the market a kind of trip gear with piezo-activator only be used to the DI switch (
Www.servocell.com), for this reason can be further referring to EP 0548732B1.
In addition, in EP 0517049A1, told about a kind of fault current release of permanent magnetism, it has an element that contains permanent magnet and have pole-face, and one of them armature element reaction is on this pole-face, and this armature element is held to resist the power of spring by permanent flux.Described pole-face is assigned with an actuator of being made by piezoelectric, and wherein this actuator reacts on anchor-hold when signal occurring, and/or this armature element promotes from pole-face.
Disclose a kind of relay of electromechanical at last from WO 00/63939A1, assembled independent tracer wherein for relay mechanism.This device is quite complicated thus.
From the prior art of described labor, task of the present invention is to create the release that a kind of switchgear with switch lock is used, and wherein piezo-activator and magnetic release are with advantageously mode cooperation.Utilize this mode both can under overload situations, thread off, also can under short-circuit conditions, thread off.
This task solves according to the invention through the features of claim 1.Improvement project is provided by dependent claims.
Theme of the present invention is, piezo-activator is controlled by self known electronic installation under overload situations on the one hand, and the switch lock of threading off thus is to separate contact, on the other hand, in order under short-circuit conditions, to thread off apace, encourage one by the electric current by tripping coil (solenoid)-be in this case short circuit current-the affact power on the piezo-activator that includes ferromagnetic material.Under the excitation of tripping coil, piezo-activator is handled described switch lock, and this switch lock affacts the switch of interruption short circuit/overload current again.Described coil can have a plurality of windings as magnetic actuator.In some cases, only the conductor of water conservancy diversion may be also with regard to it is enough in piezo-activator place process.
Following two kinds of optional prominent features of the present invention are very favorable: in first kind of prominent features, opposite with prior art, there is the combination of piezo-activator and magnet short-cut path actuator in the present invention, wherein not only causes that overload disconnects but also cause that short circuit disconnects by magnetic characteristic and the dielectric property of utilizing piezo-activator simultaneously.
In another prominent features of the present invention, can preferably utilize the combination of tripping coil and piezo-activator in the following manner as current sensor, promptly cause deflection by the magnetic force that causes by tripping coil on piezo-activator, the amplitude of this deflection is exactly measuring of the electric current that flows through.This deflection impels by piezoelectric principle produce voltage on piezo-activator, and this voltage can be analyzed by affiliated electronic installation.Because piezo-activator not only was transducer by work for actuator but also by work in this case, so here usually based on notion " piezoelectric transducer ".
In the present invention, utilized the favourable combination of magnetictrip and piezoelectric transducer,, realized overload protection again so that reliable short-circuit protection had both been realized in the electronic analysis unit of connection before utilizing in some cases.Have tangible task division this moment: short-circuit protection is by magnetictrip realization fast, and overload protection is realized by the piezoelectric transducer of electronically being controlled in some cases.
According to the application, preferably have only the release of described piezoelectric transducer and switch lock mechanically to mesh.Dropout under short-circuit conditions is directly realized by the magnetic reaction to piezoelectric transducer by described electromagnetic transducer.For this reason, described piezoelectric transducer is provided with ferromagnetic material.
In the present invention, described piezoelectric transducer can be used as current sensor equally, its mode is, by because of causing the bending of described piezoelectric transducer by the power that current flux produced of described electromagnetic transducer, the voltage that this bending can be used as again on the terminal of described piezoelectric transducer is analyzed.
Can obtain of the present invention other details and advantage by means of accompanying drawing to the description of drawings of embodiment and in conjunction with claims from following.
Fig. 1 and Fig. 2 show a kind of tripping system, and the piezoelectric transducer that it comprises electricity on the one hand comprises being used for short circuit setting-out line circle-alternately at blocking or trip status on the other hand,
Fig. 3 shows to have additional being used to and transships the tripping system shown in Fig. 1/2 of independent current converter of identification, and
Fig. 4 shows the realization of the tripping system of further improvement.
In Fig. 1, characterize mechanical switch with 1.This mechanical switch 1 is assigned with the tripping system that for example can be made up of switch lock 10.This switch lock 10 is assigned with a piezo-activator 11.This piezo-activator 11 is positioned at a support 12, and is controlled by the electronic circuit that a usefulness 20 is generally represented.
Switch 1 is connected with switch lock 10 by mechanical handling bar 2.A coil 5 also is set in treating the current circuit of switch in addition.
If in Fig. 1 of the blocking that shows switch 1, send a signal by electronic installation 20 to piezo-activator 11, just then piezo-activator 11 is activated on the meaning of bending, lock releasing switch 10 thus.Switch 1 disconnects, as shown in Figure 2.
In Fig. 1 to 4, the network with current circuit for the treatment of switch has formed a load circuit 2, and wherein coil 5 has at least one coil windings, but preferably a plurality of winding.
Under short-circuit conditions, reach in the following manner fast and to thread off, promptly show as solenoid and produce 5 pairs of piezoelectric transducers of coil, the 11 generation effects in magnetic field, and realize a kind of magnetic actuator thus by what load current flow through.This piezoelectric transducer 11 has comprised ferromagnetic material usually, makes the magnetic field of coil 5 can cause moving of piezoelectric transducer 11.Thus, utilize piezoelectric transducer 11 can cause the disconnection of switch 1 by switch lock 10.If piezoelectric transducer 11 does not comprise the magnetic material, then on piezoelectric transducer 11, can for example one ferromagnetic plate be set by stickup.
According to Fig. 3, the trip gear shown in Fig. 1/2 is replenished in the following manner: be provided with an additional current converter 30 in load circuit 2.In view of the above, in this case, the mensuration of electric current is undertaken by this additional current converter 30, has wherein connected an overload recognition unit 35 that acts on the electronic unit 20 ' after being corrected in the back of this current converter 30.
So, in Fig. 3, measure electric current, and in this overload recognition unit 35, analyze by current converter 30.The output signal of overload recognition unit arrives electronic unit 20 '.Under the situation of overload, electronic unit 20 ' control piezo-activator 11, this piezo-activator reacts and cut-off switch 1 according to Fig. 2 then.
On the contrary, piezoelectric transducer 11 directly act as current sensor in Fig. 4, and its mode is, the electric current by tripping coil 5 is mobile in this wise piezo-activator 11 at first just, makes and does not also thread off.But the mobile voltage that can be used as of piezo-activator 11 is extracted.In this case, the electronic unit of further being revised 20 " except unit 20, comprise that also independent unit 20 are used to measure and analyze the voltage signal that is produced by piezoelectric transducer 11.Therefore can additionally realize desirable current measurement with overload identification.
In above-mentioned all embodiment, especially in Fig. 3 and/or Fig. 4, piezoelectric transducer 11 is used as the actuator on the release meaning.The piezo-activator 11 of Que Dinging is advantageously saved the place like this, and only needs little control energy.
Overload identification for electronics can be scheduled to another adjustable range.The short circuit that can directly utilize piezo-activator 11 to inspire by the coil of being located in the load circuit 25 is now threaded off and is only needed simple structure, because have only a trigger element to be located in the switch lock 10.
Do not contain ferromagnetic material as long as in Fig. 1-4, be used as the piezoelectric transducer of piezo-activator 11, then can on this piezoelectric transducer, install a kind of ferromagnetic small pieces simply.
In addition, can also measure the magnetic field of magnetic actuator and measure electric current thus by piezoelectric transducer.Therefore, only just realized amperometric determination-switch lock is threaded off because of moving of producing of the electric current of load circuit by analyzing piezoelectric transducer.
Claims (10)
1. be used for the short circuit of switchgear and the release of overload protection; wherein said switchgear comprises the switch lock that can thread off by piezo-activator; be provided with a piezoelectric transducer for this reason; it is characterized in that:, distribute a magnetic actuator (5) to realize overload and short-circuit protection for described piezoelectric transducer (11) as the actuator of described switch lock (10) that are used to trip.
2. the switchgear of claim 1 is characterized in that: described piezoelectric transducer (11) is controlled to realize overlond trip by an electronic processing unit (20,20 ', 20 ").
3. the switchgear of claim 1, it is characterized in that: described magnetic actuator comprises that one acts on the tripping coil (5) of described piezoelectric transducer (11).
4. the switchgear of claim 3, it is characterized in that: described coil (5) comprises at least one winding.
5. the switchgear that one of requires of aforesaid right, it is characterized in that: described piezoelectric transducer comprises the magnetic material.
6. the switchgear of claim 5 is characterized in that: go up at described piezoelectric transducer (11) small pieces of being made by the magnetic material are installed.
7. the switchgear of one of aforesaid right requirement is characterized in that: be provided with an extra current transducer (30) at load circuit (2).
8. the switchgear of claim 7 is characterized in that: described extra current transducer (30) is by overload recognition unit (a 35) control electronic unit (20 ').
9. the switchgear of one of claim 2-6 is characterized in that: described tripping coil (5) is realized the function of current sensor in conjunction with described piezoelectric transducer (11).
10. the switchgear of claim 9 is characterized in that: measured the magnetic field of described magnetic actuator (5) and measured electric current thus by described piezoelectric transducer (11).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10340003.6 | 2003-08-29 | ||
| DE2003140003 DE10340003B4 (en) | 2003-08-29 | 2003-08-29 | Short-circuit and overload release for a switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1856856A true CN1856856A (en) | 2006-11-01 |
Family
ID=34258290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800248069A Pending CN1856856A (en) | 2003-08-29 | 2004-08-26 | Short-circuit and overload release for a switchgear |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1658628A1 (en) |
| CN (1) | CN1856856A (en) |
| DE (1) | DE10340003B4 (en) |
| WO (1) | WO2005024879A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105830190A (en) * | 2013-03-08 | 2016-08-03 | 西门子公司 | Switch, in particular power switch, for low voltages |
| CN110832652A (en) * | 2017-06-23 | 2020-02-21 | 皇家飞利浦有限公司 | Electroactive material based actuator device and method of actuation |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2884962A1 (en) | 2005-04-22 | 2006-10-27 | Norbert Roger Beyrard | CONTACTOR CIRCUIT BREAKER OPENED BY TRIGGERING USING A PIEZO ELECTRIC ACTUATOR. |
| GB2434851A (en) * | 2006-02-03 | 2007-08-08 | Pbt | A vibration resistant release mechanism |
| DE102008030095B4 (en) | 2008-06-25 | 2012-02-23 | Eaton Industries Gmbh | Switching drive for an electrical switch and electrical switch |
| DE102009033542B4 (en) | 2009-07-14 | 2013-09-19 | Siemens Aktiengesellschaft | Protection unit and electrical switching arrangement with a protection unit |
| WO2020064109A1 (en) | 2018-09-27 | 2020-04-02 | Siemens Aktiengesellschaft | Low-voltage circuit breaker |
| CN110262387B (en) * | 2019-05-31 | 2021-08-17 | 温州大学激光与光电智能制造研究院 | Magnetic effect intelligent switch automation control system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4042967A (en) * | 1975-10-28 | 1977-08-16 | Yujiro Yamamoto | Ground fault sensor |
| DE4118177C2 (en) * | 1991-06-03 | 1996-11-28 | Abb Patent Gmbh | Permanent magnetic residual current release |
| DE4142969A1 (en) * | 1991-12-24 | 1993-07-01 | Abb Patent Gmbh | Fault current protection switch |
| AU4583900A (en) * | 1999-04-19 | 2000-11-02 | Pbt (Ip) Limited | Integrated electrically actuated mechanical release mechanism |
| US6642832B2 (en) * | 2000-12-08 | 2003-11-04 | Texas Instruments Incorporated | ARC responsive thermal circuit breaker |
| DE10118098A1 (en) * | 2001-04-11 | 2002-10-17 | Abb Patent Gmbh | Service switching device |
-
2003
- 2003-08-29 DE DE2003140003 patent/DE10340003B4/en not_active Expired - Fee Related
-
2004
- 2004-08-26 WO PCT/EP2004/009544 patent/WO2005024879A1/en active Search and Examination
- 2004-08-26 CN CNA2004800248069A patent/CN1856856A/en active Pending
- 2004-08-26 EP EP04764519A patent/EP1658628A1/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105830190A (en) * | 2013-03-08 | 2016-08-03 | 西门子公司 | Switch, in particular power switch, for low voltages |
| US10147566B2 (en) | 2013-03-08 | 2018-12-04 | Siemens Aktiengesellschaft | Switch, in particular power switch, for low voltages |
| CN105830190B (en) * | 2013-03-08 | 2019-10-22 | 西门子公司 | It switchs, in particular for the power switch of low pressure |
| CN110832652A (en) * | 2017-06-23 | 2020-02-21 | 皇家飞利浦有限公司 | Electroactive material based actuator device and method of actuation |
| CN110832652B (en) * | 2017-06-23 | 2023-05-02 | 皇家飞利浦有限公司 | Electroactive material based actuator device and actuation method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10340003A1 (en) | 2005-04-07 |
| DE10340003B4 (en) | 2006-02-16 |
| WO2005024879A1 (en) | 2005-03-17 |
| EP1658628A1 (en) | 2006-05-24 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |