FR2826798A1 - Supply circuit for domestic appliances, comprises relay and electronic switch which are connected in parallel between mains and load and separately operated by control and zero detecting units - Google Patents
Supply circuit for domestic appliances, comprises relay and electronic switch which are connected in parallel between mains and load and separately operated by control and zero detecting units Download PDFInfo
- Publication number
- FR2826798A1 FR2826798A1 FR0108630A FR0108630A FR2826798A1 FR 2826798 A1 FR2826798 A1 FR 2826798A1 FR 0108630 A FR0108630 A FR 0108630A FR 0108630 A FR0108630 A FR 0108630A FR 2826798 A1 FR2826798 A1 FR 2826798A1
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- France
- Prior art keywords
- signal
- load
- relay
- electronic switch
- controlled
- 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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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
- H03K17/08144—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in thyristor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/10—Adaptation for built-in fuses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
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- Electronic Switches (AREA)
Abstract
Description
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La présente invention concerne un circuit d'alimentation d'une charge à partir d'une tension alternative, notamment du réseau électrique. The present invention relates to a circuit for supplying a load from an alternating voltage, in particular from the electrical network.
Il existe de multiples dispositifs d'alimentation d'une charge à partir d'une tension alternative, notamment du réseau électrique, consistant à commuter directement la charge ou par l'intermédiaire d'un relais. There are multiple devices for supplying a load from an alternating voltage, in particular from the electrical network, consisting in switching the load directly or by means of a relay.
La présente invention a pour but de développer un circuit d'alimentation d'une charge à partir d'une tension alternative, permettant de commuter la charge dans des conditions simples et en mettant en peuvre des moyens réduits, notamment pour l'alimentation d'appareils électroménagers d'une puissance de quelques centaines de watts jusqu'à quelques kW. The aim of the present invention is to develop a circuit for supplying a load from an alternating voltage, making it possible to switch the load under simple conditions and by using reduced means, in particular for supplying household appliances with a power of a few hundred watts up to a few kW.
A cet effet, l'invention concerne un circuit d'alimentation caractérisé en ce qu'il comprend : - en parallèle, un relais et un commutateur électronique commandé pour brancher la charge à la tension alternative d'alimentation, - une commande pour envoyer un signal de branchement ou de coupure de la charge, - un circuit de commande branché entre les bornes de la tension d'alimentation, pour en détecter les passages à 0, recevant les signaux de commande de la charge pour - émettre, à la réception d'un signal de branchement de la charge, * un signal de conduction destiné au commutateur commandé pour le débloquer à un instant donné, fixé à un passage par 0 de la tension d'alimentation et de durée suffisante pour permettre la fermeture du relais entre deux passages à 0 de la tension d'alimentation, * un signal de fermeture destiné au relais pour en commander la fer- meture pendant le temps d'alimentation de la charge, ce signal de fermeture étant postérieur au signal de conduction, - émettre, à la réception d'un signal de coupure de la charge, * un signal destiné au composant commandé pour le débloquer entre deux passages par 0 de la tension d'alimentation, pendant le temps nécessaire à l'ouverture du relais, pour se fermer avant l'ouverture du relais et s'ouvrir après la fermeture de ce relais, * un signal pour ouvrir le relais, ce signal étant envoyé au relais après le signal bloquant le composant. To this end, the invention relates to a supply circuit characterized in that it comprises: - in parallel, a relay and an electronic switch controlled to connect the load to the alternating supply voltage, - a command to send a load connection or cut-off signal, - a control circuit connected between the supply voltage terminals, to detect changes to 0, receiving the load control signals to - transmit, upon reception of the load '' a load connection signal, * a conduction signal intended for the commanded switch to unlock it at a given instant, fixed at a passage of 0 of the supply voltage and of sufficient duration to allow the closing of the relay between two changes to 0 of the supply voltage, * a closing signal intended for the relay to control closing during the load supply time, this closing signal being subsequent to the signal conduction, - issue, on receipt of a load cut-off signal, * a signal intended for the component controlled to unlock it between two passages of the supply voltage by 0, for the time necessary for the opening of the relay, to close before the relay opens and open after the relay is closed, * a signal to open the relay, this signal being sent to the relay after the signal blocking the component.
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Ce circuit permet de brancher une charge, par exemple de manière cyclique, pendant une durée au minimum de quelques minutes tout en bénéficiant de la précision de la commutation assurée par un commutateur électronique sans pour autant que celui-ci ne doive être dimensionné pour dissiper la puissance qu'il consommerait lui-même, s'il restait en service pendant toute la durée d'alimentation de la charge. Ceci permet de sous-dimensionner le commutateur électronique du fait de son temps de conduction très court se traduisant par une puissance dissipée très faible. This circuit makes it possible to connect a load, for example cyclically, for a period of at least a few minutes while benefiting from the precision of the switching ensured by an electronic switch without, however, this having to be sized to dissipate the power that it would consume itself, if it remained in service for the entire duration of supply of the load. This makes it possible to undersize the electronic switch because of its very short conduction time resulting in a very low dissipated power.
Cela permet également de couper la tension de manière précise lors de son passage au 0 de tension. This also makes it possible to cut the voltage precisely when it goes to voltage 0.
De façon avantageuse, le commutateur électronique est un triac. Ce triac est de préférence en série avec un fusible de protection. Advantageously, the electronic switch is a triac. This triac is preferably in series with a protective fuse.
La présente invention sera décrite ci-après de manière plus détaillée à l'aide des dessins annexés dans lesquels : - la figure 1 est un schéma par blocs d'un circuit d'alimentation d'une charge selon l'invention, - la figure 2 est un mode de réalisation du schéma de la figure 1, - la figure 3 montre dans ses parties A, B, C, D, E, les chronogrammes d'une commutation de charge avec le circuit d'alimentation selon l'invention. The present invention will be described below in more detail using the accompanying drawings in which: - Figure 1 is a block diagram of a load supply circuit according to the invention, - Figure 2 is an embodiment of the diagram in FIG. 1, FIG. 3 shows in its parts A, B, C, D, E, the timing diagrams of a load switching with the supply circuit according to the invention.
Selon la figure 1, l'invention concerne un circuit d'alimentation d'une charge CH par une tension d'alimentation alternative V, par exemple le réseau électrique fournissant une tension de 230 V sous une fréquence de 50 Hz. According to FIG. 1, the invention relates to a circuit for supplying a load CH with an alternating supply voltage V, for example the electrical network supplying a voltage of 230 V at a frequency of 50 Hz.
Ce circuit d'alimentation se compose d'un montage en parallèle formé d'un relais R et d'un commutateur électronique commandé TR. Ce montage est branché entre l'une des bornes d'alimentation, de préférence la borne de phase PH et la charge CH. This supply circuit consists of a parallel circuit formed by a relay R and a controlled electronic switch TR. This circuit is connected between one of the supply terminals, preferably the PH phase terminal and the load CH.
Le circuit comprend également une commande C qui dans le cas le plus simple peut être un bouton marche-arrêt de mise en oeuvre de la charge CH ou de sa coupure. La commande C envoie un signal de branchement SF pour mettre en oeuvre la charge ou un risque de coupure SC pour couper la charge CH. The circuit also includes a command C which in the simplest case can be an on-off button for implementing the load CH or for cutting it off. The command C sends a connection signal SF to carry out the load or a risk of cut SC to cut the load CH.
Le circuit d'alimentation comprend également un circuit de commande CC branché entre les deux bornes PH/N de l'alimentation en tension alternative pour détecter les variations du signal de tension alternative et notamment ses passages à 0. Le circuit d'alimentation CC reçoit The power supply circuit also includes a DC control circuit connected between the two PH / N terminals of the AC voltage supply to detect variations in the AC voltage signal and in particular its passage to 0. The DC power supply circuit receives
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les signaux de la commande C et les combine aux signaux de détection de la tension V, pour générer les signaux S 1 TR, S2TR de mise en oeuvre du commutateur électronique ainsi que les signaux SIR, S2R de commutation du relais R. the signals of the command C and combines them with the signals for detecting the voltage V, to generate the signals S 1 TR, S2TR for operating the electronic switch as well as the signals SIR, S2R for switching the relay R.
Le signal S1TR est un signal de conduction destiné au commutateur commandé TR pour le débloquer à un instant donné après la réception par le circuit de commande CC du signal SF de la commande C. Ce signal S1TR débloque le commutateur commandé TR à un passage par 0 de la tension d'alimentation V. Ce signal de conduction S 1 TR reste appliqué pendant une durée courte mais suffisante pour permettre la fermeture du relais R. Le signal de conduction S1TR est supprimé à un passage à 0 de la tension V. The signal S1TR is a conduction signal intended for the controlled switch TR to unlock it at a given instant after reception by the control circuit CC of the signal SF of the command C. This signal S1TR unblocks the controlled switch TR at a passage through 0 of the supply voltage V. This conduction signal S 1 TR remains applied for a short time but sufficient to allow the closing of the relay R. The conduction signal S1TR is suppressed at a change to 0 of the voltage V.
Ce signal S 1 TR est représenté par le chronogramme B à la figure 3, en liaison avec la courbe de la tension représentée dans le chronogramme A. This signal S 1 TR is represented by the timing diagram B in FIG. 3, in conjunction with the voltage curve represented in the timing diagram A.
Le signal SlR est un signal de fermeture destiné au relais R. Il commande la fermeture du relais pendant toute la durée d'alimentation prévue pour la charge CH. Ce signal est postérieur au signal S 1 TR. Il ferme le relais R après la fermeture du commutateur commandé TR pour être certain que la commutation de la charge CH se fasse au passage à 0 à l'instant tl de la courbe de tension. Dans ces conditions, la charge CH commence à être alimentée dès l'instant tl (chronogramme B, figure 3), le courant passant d'abord intégralement par le commutateur commandé TR à partir de l'instant tl puis il se partage entre les deux branches formées du relais R et du commutateur électronique commandé TR, la quasi-totalitéé du courant passant par le relais R. The signal SlR is a closing signal intended for the relay R. It controls the closing of the relay during all the supply duration planned for the load CH. This signal is posterior to the signal S 1 TR. It closes the relay R after the closing of the controlled switch TR to be certain that the switching of the load CH takes place at the transition to 0 at the instant tl of the voltage curve. Under these conditions, the load CH begins to be supplied from the instant tl (timing diagram B, FIG. 3), the current first passing entirely through the controlled switch TR from the instant tl then it is shared between the two branches formed by relay R and the controlled electronic switch TR, almost all of the current passing through relay R.
A l'instant t2, le signal de conduction SI TRI est coupé, ce qui bloque le commutateur commandé TR à l'état non conducteur, l'intégralité du courant passant alors par le relais R. At time t2, the conduction signal SI TRI is cut, which blocks the controlled switch TR in the non-conductive state, all of the current then passing through the relay R.
La durée de conduction du commutateur électronique commandé TR est dans l'exemple de la figure 3 égale à une période du signal de tension V. Cette durée peut correspondre à plusieurs périodes. Mais cette durée est très courte comparée à la durée de branchement de la charge CH qui selon l'exemple de la figure 3 est compris entre les instants tl et t4. The conduction time of the controlled electronic switch TR is in the example of FIG. 3 equal to one period of the voltage signal V. This duration can correspond to several periods. However, this duration is very short compared to the duration of connection of the load CH which, according to the example in FIG. 3, is between the times tl and t4.
Le signal S2TR est un signal de conduction destiné au composant commandé TR pour le débloquer et le rendre conducteur pendant un intervalle de temps au cours duquel on ouvre le relais R. Ce signal The signal S2TR is a conduction signal intended for the controlled component TR to unlock it and make it conductive during a time interval during which the relay R is opened. This signal
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S2TR est compris entre deux passages à 0 de la tension V. Dans l'exemple, il est représenté également par le chronogramme de la ligne B et s'étend sur une alternance de la courbe de tension V. S2TR is between two changes to 0 of voltage V. In the example, it is also represented by the timing diagram of line B and extends over an alternation of the voltage curve V.
Le signal SIR représenté par le chronogramme C de la figure 3 est un signal de déclenchement du relais R ou un signal de courant de maintien, alimentant la bobine du relais R. Dans le premier cas, le signal SIR est un signal impulsionnel d'une durée brève alors que dans le second cas le signal a une durée correspondant à la durée de branchement souhaitée pour le relais. The SIR signal represented by the timing diagram C in FIG. 3 is a triggering signal of the relay R or a holding current signal, supplying the coil of the relay R. In the first case, the SIR signal is a pulse signal of a short duration whereas in the second case the signal has a duration corresponding to the desired connection duration for the relay.
Le signal S2R est un signal destiné au relais R pour ouvrir celui-ci. Ce signal S2R est envoyé après le signal S2TR, c'est-à-dire après l'instant T3, pour être sûr que le relais R s'ouvre pendant la période de conduction du commutateur électronique TR. The S2R signal is a signal intended for the relay R to open it. This signal S2R is sent after the signal S2TR, that is to say after the instant T3, to be sure that the relay R opens during the conduction period of the electronic switch TR.
Ce signal S2R est envoyé après l'instant t3. Il produit l'ouverture du relais R et à partir de ce moment tout le courant alimentant la charge CH passe par le commutateur électronique TR jusqu'à l'instant de blocage du commutateur TR à la fin du signal S2TR, c'est-à-dire à l'instant t4. Cet instant correspond, comme déjà indiqué, à un passage par 0. This signal S2R is sent after time t3. It produces the opening of the relay R and from this moment all the current supplying the load CH passes by the electronic switch TR until the moment of blocking of the switch TR at the end of the signal S2TR, that is to say - say at time t4. This instant corresponds, as already indicated, to a passage through 0.
En d'autres termes, le circuit de commande fonctionne de la manière suivante en s'appuyant sur le chronogramme E de la figure 3 :
A l'instant TO, la commande C envoie un signal de fermeture SF au circuit CC. Celui-ci déclenche les signaux SI TR, S IR pour fermer d'abord le commutateur commandé TR puis le relais R pour que la fermeture se fasse à l'instant Tl correspondant à un point de passage à 0 de la tension V. Puis après l'instant t2, l'alimentation de la charge CH est assurée exclusivement par le relais R car le commutateur commandé TR étant bloqué de nouveau à l'instant t2. In other words, the control circuit operates in the following manner, based on the timing diagram E of FIG. 3:
At time TO, the command C sends a closing signal SF to the circuit CC. This triggers the signals SI TR, S IR to close first the controlled switch TR then the relay R so that the closing takes place at the instant Tl corresponding to a crossing point at 0 of the voltage V. Then after at time t2, the load CH is supplied exclusively by relay R because the controlled switch TR being blocked again at time t2.
A l'instant Tl, la commande C envoie un signal de coupure SC au circuit CC. Celui-ci commande le déblocage du commutateur TR par l'envoi du signal S2TR. Puis, lorsque le commutateur TR est débloqué, il envoie un signal d'ouverture S2R du relais R pour ouvrir celui-ci, à un instant quelconque de la courbe de tension V. Cela est possible et n'intervient pas sur l'alimentation de la charge puisque cette alimentation est alors assurée en intégralité à travers le commutateur commandé TR. A l'instant t4, lorsque le signal S2TR disparaît, en un point de passage à 0 de la tension V, l'alimentation de la charge CH est coupée. At time T1, the command C sends a cut-off signal SC to the circuit CC. This controls the release of the switch TR by sending the signal S2TR. Then, when the switch TR is released, it sends an opening signal S2R of the relay R to open the latter, at any time of the voltage curve V. This is possible and does not intervene on the supply of the load since this supply is then provided in full through the controlled switch TR. At time t4, when the signal S2TR disappears, at a crossing point at 0 of the voltage V, the supply of the load CH is cut.
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Le chronogramme D de la figure 3 montre le signal rectangulaire représentant l'alimentation de la charge. The timing diagram D in FIG. 3 shows the rectangular signal representing the supply of the load.
Il est à remarquer que les signaux de déclenchement SFSC envoyés par la commande C au circuit de commande CC peuvent être des signaux impulsionnels comme représenté par le chronogramme E de la figure 3. Il peut également s'agir d'un signal de type logique 0/1 (marche/arrêt), qui reste appliqué pendant toute la durée TO, Tl. Quelle que soit la nature de ce ou de ces signaux envoyés par la commande C, le déroulement de la commutation de la charge CH correspond aux opérations représentées aux chronogrammes B, C en liaison avec la courbe de tension V du chronogramme A. It should be noted that the trigger signals SFSC sent by the command C to the control circuit CC can be impulse signals as represented by the timing diagram E in FIG. 3. It can also be a signal of logic type 0 / 1 (on / off), which remains applied throughout the duration TO, Tl. Whatever the nature of this or these signals sent by the command C, the sequence of switching of the load CH corresponds to the operations represented in timing diagrams B, C in conjunction with the voltage curve V of timing diagram A.
La commande C peut être une commande manuelle. Il peut également s'agir d'une commande automatique déclenchée par une horloge ou par un capteur, par exemple un capteur de température ou de luminosité. La charge CH représente une puissance de quelques centaines de watts à quelques milliers de watts. Il s'agit notamment d'un appareil domestique tel qu'une plaque de cuisson, un four ou un appareil de chauffage électrique, une installation d'éclairage sans que cet énoncé ne soit limitatif. Command C can be a manual command. It can also be an automatic command triggered by a clock or by a sensor, for example a temperature or brightness sensor. The CH load represents a power of a few hundred watts to a few thousand watts. It is in particular a domestic appliance such as a hob, an oven or an electric heater, a lighting installation without this statement being limiting.
La figure 2 montre un mode de réalisation du circuit d'alimentation selon l'invention reliant la charge CH à la phase PH et au neutre N d'une source de tension alternative V. Pour le circuit de commande ce circuit d'alimentation comprend un relais R avec sa bobine de commande B et sa lamelle de commutation L commutant entre deux positions, une position ouverte et une position fermée. Ce circuit comporte comme commutateur électronique commandé TR, un triac. En amont du triac, du côté chaud, se trouve un fusible F protégeant le triac. FIG. 2 shows an embodiment of the supply circuit according to the invention connecting the load CH to the phase PH and to the neutral N of an alternating voltage source V. For the control circuit this supply circuit comprises a relay R with its control coil B and its switching plate L switching between two positions, an open position and a closed position. This circuit includes a triac as a controlled electronic switch TR. Upstream of the triac, on the hot side, is a fuse F protecting the triac.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0108630A FR2826798B1 (en) | 2001-06-29 | 2001-06-29 | CIRCUIT FOR SUPPLYING A LOAD FROM AN ALTERNATING VOLTAGE, IN PARTICULAR FROM THE ELECTRICAL NETWORK |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0108630A FR2826798B1 (en) | 2001-06-29 | 2001-06-29 | CIRCUIT FOR SUPPLYING A LOAD FROM AN ALTERNATING VOLTAGE, IN PARTICULAR FROM THE ELECTRICAL NETWORK |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2826798A1 true FR2826798A1 (en) | 2003-01-03 |
| FR2826798B1 FR2826798B1 (en) | 2003-12-12 |
Family
ID=8864935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0108630A Expired - Fee Related FR2826798B1 (en) | 2001-06-29 | 2001-06-29 | CIRCUIT FOR SUPPLYING A LOAD FROM AN ALTERNATING VOLTAGE, IN PARTICULAR FROM THE ELECTRICAL NETWORK |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2826798B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1605592A2 (en) * | 2004-06-07 | 2005-12-14 | IRCA S.p.A. | Improvement in a TRIAC protection circuit |
| WO2008102147A1 (en) * | 2007-02-24 | 2008-08-28 | Cable Management Products Ltd | Switching means for connecting a load to a power supply and its method of operation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60119128A (en) * | 1983-12-01 | 1985-06-26 | Matsushita Electric Ind Co Ltd | Switching device |
| GB2284100A (en) * | 1993-11-12 | 1995-05-24 | Caradon Mk Electric Ltd | Electrical switch |
| DE19917214A1 (en) * | 1999-04-16 | 2000-11-02 | Fsm Elektronik Gmbh | Switching electrical load using parallel switching circuit by closing and opening single contact when supply voltage polarity changes from switch-on to switch-off process |
-
2001
- 2001-06-29 FR FR0108630A patent/FR2826798B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60119128A (en) * | 1983-12-01 | 1985-06-26 | Matsushita Electric Ind Co Ltd | Switching device |
| GB2284100A (en) * | 1993-11-12 | 1995-05-24 | Caradon Mk Electric Ltd | Electrical switch |
| DE19917214A1 (en) * | 1999-04-16 | 2000-11-02 | Fsm Elektronik Gmbh | Switching electrical load using parallel switching circuit by closing and opening single contact when supply voltage polarity changes from switch-on to switch-off process |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 009, no. 277 (E - 355) 6 November 1985 (1985-11-06) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1605592A2 (en) * | 2004-06-07 | 2005-12-14 | IRCA S.p.A. | Improvement in a TRIAC protection circuit |
| EP1605592A3 (en) * | 2004-06-07 | 2006-08-02 | IRCA S.p.A. | Improvement in a TRIAC protection circuit |
| WO2008102147A1 (en) * | 2007-02-24 | 2008-08-28 | Cable Management Products Ltd | Switching means for connecting a load to a power supply and its method of operation |
| GB2460004A (en) * | 2007-02-24 | 2009-11-18 | Cable Man Products Ltd | Switching means for connecting a load to a power supply and its method of operation |
| GB2460004B (en) * | 2007-02-24 | 2011-05-18 | Cable Man Products Ltd | Switching means for connecting a load to a power supply and its method of operation |
| US8053933B2 (en) | 2007-02-24 | 2011-11-08 | Cable Management Products Ltd. | Switching means for connecting a load to a power supply and its method of operation |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2826798B1 (en) | 2003-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20090228 |