SI24371A - Varistor energy absorber with the absorption of high energies - Google Patents
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Abstract
Predmet izuma je varistorski energijski absorber za absorpcijo velikih energij, ki rešuje problem učinkovite zaščite elektronskih in električnih sistemov pred učinki izjemno močnih napetostnih impulzov, ki nastajajo na primer pri hitrih zaustavitvah generatorjev, nenadnih izklopih centralnih fotovoltaičnih inverterjev oziroma povsod tam, kjer se pojavljajo izklopi velikih induktivnih ali kapacitivnih bremen. Vključuje zgornjo in spodnjo zaključno ploščo, eno ali več vmesnih elektrod, ZnO varistorskekeramične elemente, termično in električno povezane v enoten sklop, ki omogoča dobro električno in termično prevodnost in hitro odvajanje toplote v okolico. Ko se na vhodu varistorskega energijskega absorberja pojavi izjemno močan napetostno tokovni impulz in skozenj steče tok na primer do okrog 5kA, ki lahko traja nekaj deset sekund ali celo minut, aktivira njegovo delovanje in prenapetost na vhodu omeji na nenevaren nivo. Energija, ki so jo absorbirali ZnO varistorji se hitro in v večjem delu prenese nakovinske elektrode v obliki toplote od tod pa naprej v prostor. Zaradi velike energije na volumsko enoto (J/cm3) ZnO varistorjev in specifične konstrukcije, ki omogoča intenzivno odvajanje toplote, je podaljšana življenjska doba vgrajenih varistorjev in energijski absorber po izumu lahko absorbira veliko število napetostnih oz. energijskih impulzov v času življenjske dobe naprave. Izum omogoča enostavne tehnične izvedbe, ki so zanesljive in enostavne za servisiranje.The object of the invention is a varistor energy absorber for the absorption of large energies that solves the problem of effective protection of electronic and electrical systems against the effects of extremely strong voltage pulses that are generated, for example, in the case of rapid shutdowns of generators, sudden disconnection of central photovoltaic inverters, or wherever there are disconnections of large inductive or capacitive loads. Includes upper and lower end plate, one or more intermediate electrodes, ZnO varistor-ceramic elements, thermally and electrically connected in a single assembly, which provides good electrical and thermal conductivity and rapid discharge of heat into the environment. When an exceptionally strong voltage current pulse occurs at the input of the varistor energy absorber, and flows through it for example up to about 5 kA, which may take a few ten seconds or even minutes, activates its operation and limits the overvoltage at the input to a non-dangerous level. The energy absorbed by the ZnO varistors is rapidly and in large part transferred to the transfer electrodes in the form of heat, from there to the space. Due to the large amount of energy per volume unit (J / cm3) of the ZnO varistors and the specific construction that allows intense heat dissipation, the extended lifetime of the built-in varistors is prolonged, and the energy absorber according to the invention can absorb a large number of voltage- energy pulses during the lifetime of the device. The invention provides simple technical designs that are reliable and easy to service.
Description
VARISTORSKI ENERGIJSKI ABSORBER ZA ABSORPCIJO VELIKIH ENERGIJVARISTOR ENERGY ABSORBER FOR HIGH ENERGY ABSORPTION
Področje izumaFIELD OF THE INVENTION
Izum se nanaša na varistorski energijski absorber velikih energij, izdelan s tehnologijo ZnO keramike, ki spada v družino prenapetostnih zaščitnih elementov.The invention relates to a varistor energy absorber of high energies made with the technology of ZnO ceramics, which belongs to the family of surge protection elements.
Ozadje izumaBACKGROUND OF THE INVENTION
Potrebe po energijskih absorberjih za absorpcijo velikih energij so nastale na področju obnovljivih virov energije z zahtevo po učinkoviti zaščiti elektronskih in električnih sistemov pred učinki izjemno močnih napetostnih oz. energijskih impulzov, ki nastajajo na primer pri hitrih zaustavitvah generatorjev, nenadnih izklopih centralnih fotovoltaičnih inverterjev oziroma povsod tam, kjer se pojavljajo izklopi velikih induktivnih bremen. Pri omenjenih prehodnih pojavih stečejo tokovi v razredu do 5kA (ali še večji), ki lahko trajajo nekaj deset sekund ali celo minut. Zahtevana energijska absorpcija se giblje v področju do 200 kJ v določenih aplikacijah tudi več.The need for energy absorbers for the absorption of large energies has arisen in the field of renewable energy sources, with the requirement for effective protection of electronic and electrical systems against the effects of extremely high voltage or voltage. energy impulses generated by, for example, rapid shutdowns of generators, sudden shutdowns of central photovoltaic inverters, or wherever large inductive load shutdowns occur. With these transient phenomena, currents in the class up to 5kA (or even larger) can flow, which can last for tens of seconds or even minutes. The required energy absorption ranges up to 200 kJ in certain applications even more.
Praksa je pokazala, da so klasični prenapetostni zaščitni sistemi, ki ščitijo elektronske in električne naprave pred učinki prenapetosti pri direktnih in indirektnih udarih strele in drugih hitrih prehodnih pojavih za zaščito pred učinki omenjenih velikih impulzov, neustrezni. Za direktne in indirektne udare strele so značilne velike amplitude tokov od nekaj 10kA tudi do 100kA, njihovo trajanje pa je v časovnem področju nekaj μ sekund. Varistorski energijski absorberji za absorpcijo velikih energij po izumu so zgrajeni z zato posebej skonstruiranimi ZnO varistorji, povezanimi v vezave, ki omogočajo hitro odvajanje toplote v okolico. Pri prehodnih pojavih kjer se sproščajo zelo velike energije vPractice has shown that the classic surge protection systems that protect electronic and electrical devices from the effects of surges in direct and indirect lightning strikes and other rapid transient phenomena to protect against the effects of these large pulses are inadequate. Direct and indirect lightning strikes are characterized by high current amplitudes from a few 10kA up to 100kA, with a duration of several μ seconds. Varistor energy absorbers for the absorption of high energies according to the invention are constructed with specially designed ZnO varistors connected in bindings that allow rapid heat dissipation to the environment. For transient phenomena where very high energies are released in
relativno dolgem času, lahko brez večjih poškodb absorbirajo veliko energije. S tem uspešno zaščitijo elektronske in električne sisteme pred uničenjem.For a relatively long time, they can absorb a lot of energy without major damage. This successfully protects electronic and electrical systems from destruction.
Znano stanje tehnike in tehnični problemKnown state of the art and technical problem
Pri pregledu rešitev po stanju tehnike lahko ugotovimo, da večji del nam znanih patentov opisuje varistorske zaščitne sisteme s standardnimi zaščitnimi moduli za zaščito elektronskih in električnih sistemov. V patentih opisane rešitve so neustrezne, ker je zaščita pred učinki opisanih prehodnih pojavov z izjemno močnimi napetostnimi impulzi, prešibka. Prenapetostni zaščitni elementi po stanju tehnike bi imeli v opisanih pogojih prekratko življenjsko dobo, saj se giblje povprečna energijska sposobnost teh modulov največ do 5kJ (na eno absorpcijo). Zato bi bili potrebni pogosti vzdrževalni posegi povezani z zamenjavo modulov, kar bi podaljšalo izpadne čase in povečalo ekonomsko škodo.When examining the solutions according to the state of the art, it can be found that the majority of patents known to us describe varistor protection systems with standard protection modules for the protection of electronic and electrical systems. The solutions described in the patents are inadequate because the protection against the effects of the described transient phenomena with extremely strong voltage pulses is weak. According to the prior art, overvoltage protection elements would have a very short lifetime, as the average energy capacity of these modules ranges up to 5kJ (per absorption). Therefore, frequent maintenance interventions would be required in connection with module replacement, which would prolong downtime and increase economic damage.
Prav tako niso ustrezne rešitve z SiC varistorji, saj imajo nizek indeks nelinearnosti a v primerjavi z ZnO varistorji, kar pomeni v praksi, da je napetostni nivo ščitenja SiC varistorjev zelo visok v primerjavi z ZnO varistorji in zato občutljivejši elektronski elementi s SiC zaščitnimi sistemi niso dovolj zaščiteni.Also, solutions with SiC varistors are not suitable because they have a low nonlinearity index compared to ZnO varistors, which means in practice that the voltage level of protection of SiC varistors is very high compared to ZnO varistors and therefore more sensitive electronic elements with SiC protection systems are not enough protected.
Rešitev tehničnega problemaThe solution to a technical problem
Varistorski energijski absorberji po izumu predstavljajo povsem novo in učinkovito rešitev. Izum učinkovito rešuje problem absorpcije velikih energij do katerih prihaja na primer pri izklopih velikih induktivnih bremen. Po doseženih karakteristikah, vsebini in konstrukciji se izum bistveno razlikuje od vseh do sedaj znanih tovrstnih zaščit na trgu. Varistorski energijski absorber za absorpcijo velikih energij po izumu je izveden z enim ali večimi omenjenimi ZnO varistorskimi keramičnimi elementi in vmesnimi elektrodami ki so nameščeni med zgornjo in spodnjo zaključno ploščo in so s spojnimi elementi povezani v celoto. Varistorski energijski absorber po izumu bolj uspešno zaščiti občutljive elektronske in električne sisteme pred učinki močnih napetostnih impulzov kot znani prenapetostni zaščitni sistemi.Varistor energy absorbers of the invention are a completely new and effective solution. The invention effectively solves the problem of the absorption of high energies, which occurs, for example, when switching off large inductive loads. In terms of the achieved characteristics, content and construction, the invention differs significantly from all known protection of this type on the market. The high energy absorber varistor absorber of the invention is made with one or more of the aforementioned ZnO varistor ceramic elements and intermediate electrodes which are arranged between the upper and lower end plates and are connected in their entirety by the connecting elements. The varistor energy absorber of the invention more successfully protects sensitive electronic and electrical systems from the effects of high voltage pulses than known surge protection systems.
Omenjeni varistorski energijski absorber za absorpcijo velikih energij ima več ključnih prednosti glede na stanje tehnike:Said varistor energy absorber for high energy absorption has several key advantages over the prior art:
- absorbira lahko veliko energije v relativno dolgem času brez večjih poškodb;- can absorb a lot of energy in a relatively long time without major damage;
- prenapetostni odvodniki so ZnO varistorji, ki že po svoji strukturi premorejo veliko energijo na volumsko enoto (J/cm3).- surge arresters are ZnO varistors that already have large energy per volume unit (J / cm 3 ) by their structure.
- energija, ki jo absorbira ZnO varistor se hitro in v večjem delu prenese na kovinske elektrode v obliki toplote, z elektrod pa v okolico,- the energy absorbed by the ZnO varistor is rapidly and largely transferred to the metal electrodes in the form of heat and from the electrodes to the environment,
- zaradi intenzivnega odvajanja toplote je podaljšana življenjska doba vgrajenih ZnO varistorjev,- due to the intensive heat dissipation, the lifetime of the built-in ZnO varistors is extended,
- zaradi izvirne konstrukcije lahko v splošnem absorbira veliko število energijskih impulzov.- Due to its original construction, it can generally absorb a large number of energy impulses.
Nadaljnje prednosti in uporabnosti izuma bodo postale še bolj jasne tudi povprečnemu strokovnjaku iz priloženih slik in opisov.The further advantages and applicability of the invention will become even more apparent to the average person skilled in the art and accompanying drawings.
Slika 1 Varistorski energijski absorber po izumu z dvema ZnO varistorjema v razporeditvenem prikazu,Figure 1 Varistor energy absorber of the invention with two ZnO varistors in layout view,
Slika 2 Prikaz varistorskega energijskega absorberja z električnima priključkoma,Figure 2 Illustration of a varistor energy absorber with electrical connections,
Slika 3 Prikaz izvedbe varistorskega energijskega absorberja s štirimi ZnO varistorji.Figure 3 Demonstration of a varistor energy absorber with four ZnO varistors.
Varistorski energijski absorber za absorpcijo velikih energij 1, prikazan na Sliki 1, je v osnovi sestavljen iz zgornje zaključne plošče 2, prednostno cilindrične oblike. Pod njo so v navpični smeri nameščeni, ZnO varistorski keramični element 6, vmesna elektroda 8, spet ZnO varistorski keramični element 6, ki nalega na spodnjo zaključno ploščo 10.The varistor energy absorber for high energy absorption 1 shown in Figure 1 is essentially composed of an upper end plate 2, preferably a cylindrical shape. Below it, in a vertical direction, are mounted a ZnO varistor ceramic element 6, an intermediate electrode 8, and again a ZnO varistor ceramic element 6 which rests on the lower end plate 10.
V stike med navedenimi elementi (zgornja zaključna plošča 2, ZnO varistorska keramična elementa 6, vmesna elektroda 8, spodnja zaključna plošča 10) so, kot to prikazuje Slika 1, lahko nameščene plasti električno in termično prevodnega medija 4, ki so izdelane iz materialov z visoko električno in termično prevodnostjo in namenjene izboljšanju prevodnosti med navedenimi elementi energijskega absorberja 1.The contacts between said elements (upper end plate 2, ZnO varistor ceramic elements 6, intermediate electrode 8, lower end plate 10), as shown in Figure 1, can be applied layers of electrically and thermally conductive medium 4 made of materials with high electrical and thermal conductivity and designed to improve the conductivity between said energy absorber elements 1.
Zgornja zaključna plošča 2, spodnja zaključna plošča 10, vmesna elektroda 8, ZnO varistorska keramična elementa 6, omenjene plasti termično prevodnega medija 4 so med seboj povezani z enim ali več spojnimi elementi prednostno vijaki 12, ki vključujejoThe upper end panel 2, the lower end panel 10, the intermediate electrode 8, the ZnO varistor ceramic element 6, said layers of thermally conductive medium 4 are interconnected by one or more connecting elements preferably screws 12 which include
steblo vijaka 16 in matico 14 in zagotavljajo dober mehanski in električni stik med omenjenimi elementi varistorskega energijskega absorberja 1. V zgornjo zaključno ploščo 2 in spodnjo zaključno ploščo 10 so lahko vdelane odprtine 24 za namestitev omenjenih spojnih elementov prednostno vijakov 12.bolt 16 and nut 14 and provide good mechanical and electrical contact between said elements of the varistor energy absorber 1. In the upper end plate 2 and the lower end plate 10, openings 24 may be provided to accommodate said connecting elements, preferably screws 12.
Vmesne elektrode 8 so lahko različnih oblik, odvisno od zahtevane konstrukcije energijskega absorberja, izdelane so iz termično in električno prevodnih materialov prednostno kovin kot so aluminij, baker, železo in oblikovane kot hladilna telesa (glej, Sliko 1, Sliko 2), da se energija, ki sojo absorbirali ZnO varistorski keramični elementi 6 v čim večjem delu v obliki toplote prenese nanje, od njih pa v okolje.Intermediate electrodes 8 can be of different shapes, depending on the energy absorber construction required, made of thermally and electrically conductive materials, preferably metals such as aluminum, copper, iron, and formed as heat sinks (see, Figure 1, Figure 2) to generate energy , which absorb soybean ZnO varistor ceramic elements 6 as much as possible in the form of heat and transfer them to the environment.
Število ZnO varistorskih keramičnih elementov 6, ki jih vgradimo v varistorski energijski absorber po izumu, glede na zahteve po obsegu zaščite, lahko variira. Minimalna izvedba ima vgrajen vsaj en ZnO varistorski keramični element 6. Na Sliki 2 je prikazana izvedba z dvema ZnO varistorskima keramičnima elementoma 6, na Sliki 3 pa s štirimi. Število vgrajenih ZnO varistorskih keramičnih elementov 6 je lahko sodo ali liho, odvisno od zahtevane aplikacije. Število vmesnih elektrod 8 določimo glede na zahtevano električno vezavo, potrebno hlajenje in zahtevano absorpcijo energije.The number of ZnO varistor ceramic elements 6 to be incorporated into the varistor energy absorber of the invention may vary depending on the extent of protection required. The minimum embodiment has at least one ZnO varistor ceramic element 6 installed. Figure 2 shows an embodiment with two ZnO varistor ceramic elements 6 and four with four. The number of installed ZnO varistor ceramic elements 6 may be even or odd, depending on the application required. The number of intermediate electrodes 8 is determined according to the required electrical connection, the cooling required and the energy absorption required.
Na zgornjo zaključno ploščo 2, spodnjo zaključno ploščo 10, v kolikor sta električno prevodni (delujeta kot elektrodi) in na vmesne elektrode 8, je glede na električno vezavo, mogoče pritrditi električne priključke 22, ki povezujejo omenjene elektrode s sistemom, ki ga varistorski energijski absorber 1 ščiti. Električni priključek 22 prednostno sestavlja električni kabel 18, izdelan iz električno prevodnega materiala, s presekom, ki mora ustrezati največjemu toku in vijak 20. Omenjeni električni priključek 22 je pritrjen na zgornjo priključno ploščo 2 z vijakom 20 ali je lahko prispajkan ali privarjen. Drugi električni priključek 22 je pritrjen na vmesno elektrodo 8 kot je to prikazano na Sliki 2.To the upper end plate 2, the lower end plate 10, insofar as they are electrically conductive (act as electrodes) and to the intermediate electrodes 8, depending on the electrical connection, it is possible to attach electrical terminals 22 which connect said electrodes to a system which is varistor energy absorber 1 protects. The electrical connector 22 preferably consists of an electrical cable 18 made of electrically conductive material with a cross section that corresponds to the maximum current and a screw 20. Said electrical connector 22 is secured to the upper terminal board 2 by a screw 20 or may be soldered or welded. The second electrical terminal 22 is attached to the intermediate electrode 8 as shown in Figure 2.
V splošnem so možne različne vezave navedenih elementov varistorskega energijskega absorberja 1. Sestaviti jih je mogoče v navpično, vodoravno ali kombinirano konfiguracijo. Dva primera sta prikazana na Sliki 2 in Sliki 3. Varistorske energijske absorberje po izumu v splošnem vgradimo v zaščitna ohišja prednostno plastična ali kovinska ali jih uporabimo brez ohišja Uporabljamo jih za odvajanje energije v enosmernih, izmeničnih enofaznih in večfaznih sistemih.Generally, different attachments of said elements of the varistor energy absorber 1 are possible. They can be assembled in a vertical, horizontal or combined configuration. Two examples are shown in Figure 2 and Figure 3. Generally, the varistor energy absorbers of the invention are generally incorporated into protective housings, preferably plastic or metal, or used without housing. They are used for energy dissipation in single-phase, alternating single-phase and multiphase systems.
Delovanje varistorskega energijskega absorberja 1 in prednosti izuma so pojasnjene na naslednjem primeru.The operation of the varistor energy absorber 1 and the advantages of the invention are explained in the following example.
Varistorski energijski absorber 1 v splošnem ščiti pred uničenjem električne in elektronske dele neke naprave. V primerih nekontrolirane ali kontrolirane sprostitve nakopičene električne energije v obliki močnega tokovno napetostnega impulza varistorski energijski absorber 1 absorbira energijo, ki se je nakopičila v induktivnih/kapacitivnih delih električnih sistemov na primer v navitjih električnih generatorjev. V nedelujočem stanju skozenj teče zanemarljivo majhen tok. V primerih kot so hitre zaustavitve generatorjev, nenadni izklopi centralnih fotovoltaičnih inverterjev oziroma povsod tam, kjer se pojavljajo izklopi velikih induktivnih bremen, se na primer na električnem priključku 22 ki je pritrjen na zgornjo zaključno ploščo 2 (glej Sliko 2), pojavi izjemno močan napetostni impulz in aktivira delovanje varistorskega energijskega absorberja 1, ki prenapetost na vhodu omeji na nenevaren nivo. Ob močnem napetostnem impulzu steče skozi ZnO varistorska keramična elementa 6 in vmesno elektrodo 8 visok tok (do okrog 5kA), ki lahko traja nekaj deset sekund ali celo minut. ZnO varistorska keramična elementa 6 v tem času absorbirata zelo veliko energije. Prejeto toploto oddata v največji meri vmesni elektrodi 8, izdelani iz termično in električno prevodnih materialov, ki jo prenese v okolje in na ta način učinkovito hladi ZnO varistorska keramična elementa 6. Temperatura omenjenih ZnO varistorskih keramičnih elementov 6 v povprečju zaradi učinkovitega hlajenja ne presega za več kot nekaj 10°C temperature okolja. Varistorski energijski absorber po izumu lahko učinkovito absorbira tudi ponavljajoče impulze, na primer več kot 1000 krat v življenjski dobi. Varistorski energijski absorberji za absorpcijo velikih energij po izumu so zgrajeni z ZnO varistorji, povezanimi v sestave, ki omogočajo hitro odvajanje toplote v okolico in imajo številne prednosti glede na stanje tehnike. Absorbirajo lahko veliko energije v relativno dolgem času brez večjih poškodb. Energija, ki jo absorbirajo vgrajeni ZnO varistorji, se hitro in v večjem delu prenese na kovinske elektrode v obliki toplote in od elektrod naprej v prostor. Življenjska doba vgrajenih varistorjev je zaradi intenzivnega odvajanja toplote podaljšana, zaradi omenjene konstrukcije pa varistorski energijski absorber po izumu v življenjski dobi lahko absorbira veliko število napetostnih oz. energijskih impulzov.The varistor energy absorber 1 generally protects against the destruction of the electrical and electronic parts of a device. In cases of uncontrolled or controlled release of accumulated electricity in the form of a strong current-voltage pulse, the varistor energy absorber 1 absorbs the energy that has accumulated in the inductive / capacitive parts of electrical systems, for example in winding electrical generators. In an inactive state, a negligible flow flows through it. In cases such as rapid shutdowns of generators, sudden shutdowns of central photovoltaic inverters, or wherever large inductive load shutdowns occur, for example, an extremely high voltage appears at the electrical terminal 22 attached to the upper terminal board 2 (see Figure 2). pulse and activates the operation of the varistor energy absorber 1, which limits the input voltage to a non-hazardous level. With a strong voltage pulse, the varistor ceramic elements 6 and the high-current intermediate electrode 8 (up to about 5kA) can flow through the ZnO, which can take several tens of seconds or even minutes. The ZnO varistor ceramic elements 6 absorb a great deal of energy during this time. The received heat is mainly emitted by intermediate electrodes 8 made of thermally and electrically conductive materials, which it transfers to the environment and thus effectively cools the ZnO varistor ceramic elements 6. The average temperature of said ZnO varistor ceramic elements 6 does not, on average, exceed by more than some 10 ° C ambient temperature. The varistor energy absorber of the invention can also effectively absorb repetitive impulses, for example, more than 1000 times over a lifetime. Varistor energy absorbers for the absorption of large energies according to the invention are constructed with ZnO varistors connected in compositions that allow rapid heat dissipation to the environment and have many advantages over the prior art. They can absorb a lot of energy in a relatively long time without major damage. The energy absorbed by the built-in ZnO varistors is quickly and largely transmitted to the metal electrodes in the form of heat and from the electrodes to the room. Due to the intense heat dissipation, the lifetime of the built-in varistors is extended, and due to the mentioned construction, the varistor energy absorber according to the invention can absorb a large number of voltage or voltage sources according to the invention. energy impulses.
Izum omogoča tehnične izvedbe, ki so enostavne za servisiranje in zanesljivo delujejo. Zgornji opis vsebuje veliko posebnosti, ki pa ne omejujejo širine izuma in služijo le kot ponazoritev izvedb izumljenega proizvoda. Obseg izuma ne določajo opisani primeri ampak patentni zahtevki, ki so dodani v nadaljevanju.The invention provides technical implementations that are easy to service and reliably operate. The above description has many features, which do not, however, limit the scope of the invention and serve only to illustrate embodiments of the invented product. The scope of the invention is not determined by the examples described, but by the claims which are added below.
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| US10707678B2 (en) | 2016-12-23 | 2020-07-07 | Ripd Research And Ip Development Ltd. | Overvoltage protection device including multiple varistor wafers |
| US11223200B2 (en) | 2018-07-26 | 2022-01-11 | Ripd Ip Development Ltd | Surge protective devices, circuits, modules and systems including same |
| US11723145B2 (en) | 2021-09-20 | 2023-08-08 | Raycap IP Development Ltd | PCB-mountable surge protective device modules and SPD circuit systems and methods including same |
| US11862967B2 (en) | 2021-09-13 | 2024-01-02 | Raycap, S.A. | Surge protective device assembly modules |
-
2013
- 2013-05-23 SI SI201300125A patent/SI24371A/en not_active IP Right Cessation
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| US9634554B2 (en) | 2014-09-24 | 2017-04-25 | Raycap, S.A. | Short-circuit switch having semiconductor switch and arrangement for short-circuiting a three-phase alternating voltage |
| US10319545B2 (en) | 2016-11-30 | 2019-06-11 | Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. | Surge protective device modules and DIN rail device systems including same |
| US10734176B2 (en) | 2016-11-30 | 2020-08-04 | Raycap, Surge Protective Devices, Ltd. | Surge protective device modules and DIN rail device systems including same |
| US10707678B2 (en) | 2016-12-23 | 2020-07-07 | Ripd Research And Ip Development Ltd. | Overvoltage protection device including multiple varistor wafers |
| US10447026B2 (en) | 2016-12-23 | 2019-10-15 | Ripd Ip Development Ltd | Devices for active overvoltage protection |
| US11165246B2 (en) | 2016-12-23 | 2021-11-02 | Ripd Research And Ip Development Ltd. | Overvoltage protection device including multiple varistor wafers |
| US11374396B2 (en) | 2016-12-23 | 2022-06-28 | Ripd Research And Ip Development Ltd. | Devices for active overvoltage protection |
| US11881704B2 (en) | 2016-12-23 | 2024-01-23 | Ripd Research And Ip Development Ltd. | Devices for active overvoltage protection including varistors and thyristors |
| US10679814B2 (en) | 2017-05-12 | 2020-06-09 | Raycap IP Development Ltd | Surge protective device modules including integral thermal disconnect mechanisms and methods including same |
| US10340110B2 (en) | 2017-05-12 | 2019-07-02 | Raycap IP Development Ltd | Surge protective device modules including integral thermal disconnect mechanisms and methods including same |
| US10685767B2 (en) | 2017-09-14 | 2020-06-16 | Raycap IP Development Ltd | Surge protective device modules and systems including same |
| US11223200B2 (en) | 2018-07-26 | 2022-01-11 | Ripd Ip Development Ltd | Surge protective devices, circuits, modules and systems including same |
| US11862967B2 (en) | 2021-09-13 | 2024-01-02 | Raycap, S.A. | Surge protective device assembly modules |
| US11723145B2 (en) | 2021-09-20 | 2023-08-08 | Raycap IP Development Ltd | PCB-mountable surge protective device modules and SPD circuit systems and methods including same |
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Legal Events
| Date | Code | Title | Description |
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| OO00 | Grant of patent |
Effective date: 20141202 |
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| SP73 | Change of data on owner |
Owner name: CRDCE D.O.O.; SI Effective date: 20170302 |
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| SP73 | Change of data on owner |
Owner name: RAYCAP D.O.O.; SI Effective date: 20201217 |
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| KO00 | Lapse of patent |
Effective date: 20170302 |