CN105556636A - Fuse element for an overvoltage protection device - Google Patents
Fuse element for an overvoltage protection device Download PDFInfo
- Publication number
- CN105556636A CN105556636A CN201480043771.7A CN201480043771A CN105556636A CN 105556636 A CN105556636 A CN 105556636A CN 201480043771 A CN201480043771 A CN 201480043771A CN 105556636 A CN105556636 A CN 105556636A
- Authority
- CN
- China
- Prior art keywords
- housing
- overvoltage protection
- conductor
- housing part
- protector
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/36—Means for applying mechanical tension to fusible member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3031—Means for locking the spring in a charged state
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
Abstract
The invention relates to a fuse element for an overvoltage protection device (uSE). The fuse device has a multi-part housing, which has at least a first housing part and a second housing part, wherein the first housing part and the second housing part engage with each other in a form-closed manner at least in some sections, such that a pressure-resistant interior is formed. The interior has a continuous conductor, wherein the first housing part and the second housing part can be moved in relation to each other. In a first state, the first housing part and the second housing part are under pre-load, wherein mutual movement of the housing parts is prevented by a retaining mechanism, wherein the continuous conductor provides an electrically conductive connection. In a second state, the pre-load F has led to a movement of the housing parts in relation to each other, wherein the continuous conductor is interrupted. The continuous electrical conductor is dimensioned in such a way that the maximum pulse current of the overvoltage protection device (uSE) to be protected can be nondestructively conducted in the first state. The retaining mechanism can be released by external triggering, wherein the triggering is effected by means of a measured variable with regard to the overvoltage protection device (uSE) to be protected.
Description
Technical field
The present invention relates to a kind of protector for overvoltage protection.
Background technology
Overvoltage protection needs to prevent electric equipment from occurring overvoltage, especially impacts, just as when equipment is opened or or even thunderbolt situation within the scope of several milliseconds under occur.If there is such class situation, so, on said device the electric current of process just need to be flowed out by described overvoltage protection within this short time.Within all the other times, i.e. so-called specified running time, usually without any electric current or only there is minimum electric current to flow through described overvoltage protection.
But overvoltage protection also will bear ageing process, described overvoltage protection thus may be caused impaired.These processes may also depend on impulsive discharge process.If described overvoltage protection occurs lasting impaired, that is break down situation, so, the immeasurable magnitude of current also can be had to flow through described overvoltage protection.In the worst cases, described electric current reaches the short circuit current intensity driving electrical network.
Due to the time of staying longer, current flux that intensity is larger; even if on the minimum residual resistance of impaired overvoltage protection its feeder in other words; also can produce amount of heat, these heats may cause described overvoltage protection or relevant device is on fire or blast.
Due to this reason, overvoltage protection is provided with security unit more and more, can interrupt the short circuit current occurred in case of a fault.
If the isolation of overvoltage protection and AC network constructs more smooth and easy due to periodic zero passage usually, so, become more thorny with the isolation of high power DC electrical network owing to lacking zero passage.In addition, particularly photovoltaic system has particular challenge, because it has special source characteristic.
By the known locking device from AC power field of prior art, it just can interrupt short circuit current by mechanical device before reaching maximum amplitude.Wherein, even if when having there is electric arc when isolating, so, electric arc has also been interrupted due to zero passage below.Otherwise lighting without (the answering) under stream mode is not the high voltage of requirement, be exactly require that distance is very little.For this reason, can set less nominal distance when relating to specified operation, this just makes described locking device can realize minimum structure size.
No matter these measures are for direct current network, or for high power AC electrical network, all can not directly transform.All the time to consider at this and there will be electric arc.Because lack zero passage in direct current network, electric arc just cannot extinguish immediately and interruptive current passes through thus.In high power DC electrical network, isolation distance is sufficiently large, to prevent from again lighting a fire.Need the measure be applicable to for this reason, to improve so-called isolation distance, thus arc voltage is raised by this way, so that realize isolation by the extinguishing of electric arc.
In other words, due to good arc quenching effect, suggestion uses fusing insurance.Wherein, these fusing insurances can have such specification, and described fusing insurance can be tripped under the current condition being greater than rated current.The surge current of event but these fusing insurances also can withstand shocks simultaneously, that is rated current of described overvoltage protection.In order to consider this needs, larger melt cross section must be provided.But larger melt cross section can cause the electric current that will trip in case of a fault thus also higher.
In other words, two require to be difficult to meet simultaneously, therefore cause the high cost of device and somewhat expensive thus.
This is especially very difficult in photovoltaic system because wherein in the case of a fault short circuit current only slightly larger than the rated current when maximum light.So, in principle, described fusing insurance must only only slight beyond recognizing short circuit during rated current and triggering open circuit thus.But this is extremely difficult to realize in practice.
Summary of the invention
No matter the object of the invention is to, be at high power AC electrical network or in direct current network, and the cutout ability of fusing insurance all becomes available.
The solution of above-mentioned purpose is drawn by the feature described in independent claims according to the present invention.Expedients of the present invention is illustrated by dependent claims.
Accompanying drawing explanation
With reference to the accompanying drawings by preferred embodiment setting forth the present invention further.
Wherein:
Fig. 1 is under schematic locking device according to the present invention is in the first state;
Fig. 2 is under schematic locking device according to the present invention is in the second state; And
Fig. 3 is each indicative icon of the element according to locking device of the present invention.
Mark explanation
Protector S1
Overvoltage protection
First shell body G1
Second housing body G2
The inner chamber IR of sealing
Uniaxial pressure F
Locking mechanism H
Conductor L
External trigger T
Arc-extinguishing medium LM
Embodiment
Show a kind of for overvoltage protection in fig. 1 and 2
protector S1.Described protector has the more than one piece sectional casing comprising at least the first housing G1 and the second housing G2 and be nested.In order to identify better, show separately described two shell bodies in figure 3.
Described first housing G1-illustrates that above Fig. 3 just illustrating that-two housings have at least under figure 3 with described second housing G2-is partly fitted together to each other in the mode of form fit thus is formed a kind of inner chamber IR of basic sealing.
Guided the conductor L run through by this inner chamber IR, see Fig. 1.This conductor can by outside on the position being labeled with A and B by electrical contact.For this reason, such as can arrange applicable metallisation on described shell body G1 and G2 to be fixed.
Described two shell body G1 and G2 can relative movement, as Fig. 1 and Fig. 2 relatively shown in.Wherein, described shell body G2 can move in the inside of described shell body G1, and wherein very advantageously, described second housing body G2 depends on state and stays in described first outer casing member, thus carrys out definition structure size by described first shell body.
Under the running status of described protector, i.e. the first state (initial condition), under described first shell body G1 and described second housing body G2 is in uniaxial pressure F.
The formation of uniaxial pressure F, such as by be placed into or by shaping enter spring between described first shell body G1 and described second housing body G2 formed, but therefore do not get rid of and form other active force, such as magnetic force.
In order to avoid the less desirable mutual movement of shell body G1, G2 described in initial condition, as shown in Figure 1, prevented mobile by locking mechanism H, wherein, described in the conductor L that runs through provide conduction to connect.
Figure 2 illustrates locking mechanism H.Described shell body G1 and G2 be movement mutually under the effect of uniaxial pressure F.Wherein, described conductor is because the effect of uniaxial pressure is by mechanical load to a certain extent, and described conductor L is isolated in inner chamber IR, and that is described conductor L is pulled off disconnection.Become more simple therefrom, that is: only described conductor L both need be fixed on described shell body G1 on the side of terminal A, the side of terminal B be fixed on described shell body G2.
In order to corresponding overvoltage protection can be born
maximum impact electric current, described in the electric conductor L that runs through there is such size in an initial condition, thus claimed overvoltage protection can not conducted with bringing any destruction in a first state
maximum impact electric current.
Described locking mechanism H has and removes by external trigger T.Described locking mechanism H can be activated by this triggering T.Wherein, a kind of like this triggering T is by claimed overvoltage protection
relevant measurement parameter carries out.
That is, can utilize the cutout ability of safety fuse by the triggering T of described outside, this bears a kind of mode of the mechanical strain isolated that causes by described conductor L to realize.Electric arc simultaneously also by producing causes described conductor to fuse, thus isolation distance becomes farther and arc voltage rising.If described arc voltage has exceeded rated voltage, electric arc just extinguishes and current circuit is interrupted.Therefore, as preferably, what be disposed in the conductor in inner chamber IR is a kind of fusing melt at least partially.
Therefore, even if under direct current network condition, also can realize cutting off, thus form hard-core impulse current compatible.
One of them of described two shell bodies G1, G2 forms by selecting from the one in pottery, metal, plastics or composite material kind.The very favorable protector of cost can be made thus.
Can relative to described claimed overvoltage protection
causing the measurement parameter of external trigger T, such as, can be claimed overvoltage protection
leakage current measurement, and/or claimed overvoltage protection
the optical monitoring of electric current, and/or claimed overvoltage protection
the heating power monitoring of electric current, and/or by claimed overvoltage protection
the foil gauge of upper reaches overcurrent, and/or by the described overvoltage protection of expression
wearing and tearing or other of physical parameter of flaw directly or indirectly measure and trigger.That is, by suitably selecting one or more measurement parameter, just can in case of a fault by external trigger T and accurately according to the isolation realization disconnection reliably of time.If the value that the measurement parameter monitored is given in advance more than, spacer assembly is just activated and by out of order overvoltage protection
keep apart with electrical network.
Especially advantageously, described inner chamber IR is filled with arc-extinguishing medium LM.Can improve cutout effect thus makes structure space minimize in other words, because can produce the electric arc suppressing conductor part when locking mechanism H activates.Metallic vapour condenses upon on described arc-extinguishing medium LM, and make electric arc cool thus, arc voltage raises thus.If described arc voltage has exceeded rated voltage, electric arc just extinguishes and current circuit is interrupted.
Described arc-extinguishing medium LM is such as quartz sand and/or polyformaldehyde.
Described overvoltage protection
also very advantageously can combine as insurance according to safeties of the present invention with one, in the mode connected of connecting, be integrated into safeties.Thus, described external trigger T just can very reliably be directed on described protector.Especially, in heating power monitoring, suggestion is a kind of device of spaces compact, to make the cutout time keep minimum thus.
The overvoltage protection that can use together with safety element SI according to the present invention
it is such as the one from selecting by comprising discharging gap, kind that piezo-resistance, twin zener dioder, semiconductor switch are formed.
The movement each other of described shell body also can be used to display easily, such as to show activation thus.For this reason, applicable form or discoloration effect can be set.In addition, no matter be external trigger T, or the movement of described shell body G1, G2, or the triggering of described locking mechanism H, all can independently or be jointly used, the activation of described protector SI is reported to long-range supervising device, such as by the informationization of holding wire or another kind of form.
In a word, feature of the present invention is, the present invention when version is compact, can makes fusing insurance also can utilize good electric current capacity for quenching while tectonic type is compact, but need not receive the high activated current under shortcoming, the i.e. failure condition of tradition fusing insurance.
For this reason, (fusing) melt L and/or arc-extinguishing medium LM be positioned at sealing, the shell that is at least constructed to two-piece type.Inner part, described second shell body G2 of described shell are implemented like this, and it can be shifted out, until reach set length to described outer enclosure, the i.e. side of described first shell body G1.In order to cause described second housing body G2 to move in described first shell body G1, such as, use a kind of spring mechanism, it is placed into described between two shell bodies G1, G2 at set uniaxial pressure F.Described uniaxial pressure F and described second housing body G2 in described first shell body G1 fixing such as by a kind ofly triggering, the retainer realization that forms locking mechanism H.
If described fixed mechanism H is activated by external trigger T, uniaxial pressure F just presses to described second housing body G2 like this by a kind of (set) active force, and it is pushed out.In addition, the active force of described uniaxial pressure F wants enough highly selected, to disconnect described (fusing) melt by this uniaxial pressure.Then, on the isolated location formed thus of described (fusing) melt, form a kind of electric arc respectively according to configuration, this electric arc is isolated described (fusing) melt L further and is increased isolation distance thus.On the arc-extinguishing medium LM that the metal vapor deposition of fusing melt burnt down may exist around, and no longer continue as conductive plasma for electric arc.When sufficiently high isolation distance and resultant high arc voltage, arc extinction and electric current are by being interrupted.
In addition, the electric arc of generation causes pressure rapidly to raise.This pressure additionally produced acts on the translational speed improving described second housing body G2.Result just brings extinguishing process faster.For this reason, the design of the basic sealing of described inner chamber IR is just very favourable.This can such as realize thus, that is: on the smooth surface of each shell body G1 with G2, arrange protrusion parallel accordingly, so as alleviate all press while a kind of guiding is provided.
Even if when excess load is larger, do not use external trigger T, described (fusing) melt L also can evaporate and cause isolation thus.
Claims (8)
1. one kind for overvoltage protection
protector (SI), comprise the sectional casing that there is the first housing (G1) and the second housing (G2) and be nested, it is characterized in that, described first housing (G1) and described second housing (G2) have at least part chimeric each other thus form the inner chamber (IR) of sealing, the conductor (L) run through is provided with at described inner chamber (IR), wherein, described first housing (G1) and the second housing (G2) can relative movements;
A uniaxial pressure (F) is provided with between described first housing (G1) and described second housing (G2), in an initial condition, a locking mechanism (H) is pinned uniaxial pressure and is stoped described two housing (G1, G2) relative movement, described in the conductor (L) that runs through fixedly provide a kind of conduction respectively with the first housing and the second housing and be connected;
Cause described uniaxial pressure (F) to cause described housing (G1, G2) to be moved each other when described locking mechanism is triggered, described in the conductor (L) that runs through be pulled off;
Wherein, the conductor (L) run through described in is in an initial condition by claimed overvoltage protection
maximum impact electric current,
Wherein, described locking mechanism (H) is removed by external trigger (T), is by described overvoltage protection
trigger.
2. protector according to claim 1, is characterized in that, described first housing (G1) and the second housing (G2) one of them be one in pottery, metal, plastics or composite material.
3. the protector according to any one of the claims, is characterized in that, described external trigger (T) passes through voltage protection
to leakage current measurement, and/or the optical monitoring to electric current, and/or the heating power of electric current is monitored, and/or by flowing through the foil gauge of electric current, and/or represent voltage protection
wearing and tearing or the physical parameter of flaw directly or indirectly measure to trigger.
4. the protector according to any one of the claims, is characterized in that, described inner chamber (IR) is filled with arc-extinguishing medium (LM).
5. protector according to claim 4, is characterized in that, described arc-extinguishing medium (LM) has quartz sand and/or polyformaldehyde.
6. the protector according to any one of the claims, is characterized in that, described fuse has display unit, and it makes can pick out from the outside to be pulled off state under being initial condition or at conductor.
7. safeties, is characterized in that, described safeties comprise overvoltage protection
and the fuse (SI) according to any one of the claims, wherein, described overvoltage protection
be connected in series with described protector (SI).
8. safeties according to claim 6, is characterized in that, described overvoltage protection
it is the one in discharging gap, piezo-resistance, twin zener dioder, semiconductor switch.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013217320.2A DE102013217320A1 (en) | 2013-08-30 | 2013-08-30 | Fuse element for an overvoltage protection device |
| DE102013217320.2 | 2013-08-30 | ||
| PCT/EP2014/068333 WO2015028586A1 (en) | 2013-08-30 | 2014-08-29 | Fuse element for an overvoltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105556636A true CN105556636A (en) | 2016-05-04 |
Family
ID=51660433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480043771.7A Pending CN105556636A (en) | 2013-08-30 | 2014-08-29 | Fuse element for an overvoltage protection device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN105556636A (en) |
| DE (1) | DE102013217320A1 (en) |
| WO (1) | WO2015028586A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI695400B (en) * | 2016-05-23 | 2020-06-01 | 大陸商力特半導體（無錫）有限公司 | Transient voltage suppression device with thermal cutoff |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017105029B4 (en) | 2017-03-09 | 2019-10-31 | Phoenix Contact Gmbh & Co. Kg | Turn-off and overvoltage protection device with a shutdown |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3851217A (en) * | 1972-09-08 | 1974-11-26 | Sprecher & Schuh Ag | Voltage surge arrester |
| EP0791946A1 (en) * | 1996-02-29 | 1997-08-27 | Fritz Driescher KG, Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co. | High-voltage high-power fuse |
| CN101461113A (en) * | 2006-06-08 | 2009-06-17 | 德恩及索恩两合股份有限公司 | Overcurrent protection device for use in an overvoltage protection device, comprising an additional mechanical tripping device preferably designed as a striker |
| DE202012000339U1 (en) * | 2011-12-09 | 2013-03-11 | Phoenix Contact Gmbh & Co. Kg | Electric disconnecting device |
-
2013
- 2013-08-30 DE DE102013217320.2A patent/DE102013217320A1/en not_active Withdrawn
-
2014
- 2014-08-29 CN CN201480043771.7A patent/CN105556636A/en active Pending
- 2014-08-29 WO PCT/EP2014/068333 patent/WO2015028586A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3851217A (en) * | 1972-09-08 | 1974-11-26 | Sprecher & Schuh Ag | Voltage surge arrester |
| EP0791946A1 (en) * | 1996-02-29 | 1997-08-27 | Fritz Driescher KG, Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co. | High-voltage high-power fuse |
| CN101461113A (en) * | 2006-06-08 | 2009-06-17 | 德恩及索恩两合股份有限公司 | Overcurrent protection device for use in an overvoltage protection device, comprising an additional mechanical tripping device preferably designed as a striker |
| DE202012000339U1 (en) * | 2011-12-09 | 2013-03-11 | Phoenix Contact Gmbh & Co. Kg | Electric disconnecting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI695400B (en) * | 2016-05-23 | 2020-06-01 | 大陸商力特半導體（無錫）有限公司 | Transient voltage suppression device with thermal cutoff |
| US11139287B2 (en) | 2016-05-23 | 2021-10-05 | Littefluse Semiconductor (WUXI) Co., Ltd. | Transient voltage suppression device with thermal cutoff |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015028586A1 (en) | 2015-03-05 |
| DE102013217320A1 (en) | 2015-03-05 |
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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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160504 |
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| WD01 | Invention patent application deemed withdrawn after publication |