NO317719B1 - Safety device for installation materials - Google Patents
Safety device for installation materials Download PDFInfo
- Publication number
- NO317719B1 NO317719B1 NO20034680A NO20034680A NO317719B1 NO 317719 B1 NO317719 B1 NO 317719B1 NO 20034680 A NO20034680 A NO 20034680A NO 20034680 A NO20034680 A NO 20034680A NO 317719 B1 NO317719 B1 NO 317719B1
- Authority
- NO
- Norway
- Prior art keywords
- thermocouple
- electrical
- safety device
- article
- installation
- Prior art date
Links
- 238000009434 installation Methods 0.000 title claims description 15
- 238000010616 electrical installation Methods 0.000 claims abstract description 16
- 238000013021 overheating Methods 0.000 description 7
- 230000020169 heat generation Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
- H01R13/7137—Structural association with built-in electrical component with built-in switch the switch being a safety switch with thermal interrupter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/64—Contacts
- H01H37/70—Resetting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2103/00—Two poles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/76—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure with sockets, clips or analogous contacts and secured to apparatus or structure, e.g. to a wall
- H01R24/78—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure with sockets, clips or analogous contacts and secured to apparatus or structure, e.g. to a wall with additional earth or shield contacts
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Breakers (AREA)
- Control Of Combustion (AREA)
Abstract
Det er beskrevet en elektrisk installasjonsartikkel (l, 10, 15) for fast montering i elektriske anlegg der den elektriske installasjonsartikkelen er tilveiebragt med en Sikkerhetsinnretning i form av et termoelement (2) som er elektrisk tilkoblet den elektriske artikkelen slik at termoelementet bryter strømmen når temperaturen overskrider en bestemt grenseverdi.An electrical installation article (1, 10, 15) is described for fixed mounting in electrical installations where the electrical installation article is provided with a safety device in the form of a thermocouple (2) which is electrically connected to the electrical article so that the thermocouple breaks the current when the temperature exceeds a certain limit value.
Description
Den foreliggende oppfinnelse vedrører elektrisk installa-sjonsmateriell for fast montering i elektriske anlegg, som betydelig øker sikkerheten ved elektriske anlegg. The present invention relates to electrical installation material for fixed installation in electrical installations, which significantly increases the safety of electrical installations.
Hvert år forårsaker branner at store verdier og mange men-neskeliv går tapt. I 2002 utbetalte forsikringsselskapene i Norge 1,6 milliarder NOK for branner i boliger, og 1,3 milliarder for branner i næringsbygg. Ifølge statistikk fra Direktoratet for brann- og elsikkerhet for 2001 omkom to-talt 65 personer i branner i Norge det året. 9 % av disse brannene var forårsaket av varmeutvikling i stikkontakter, brytere og sikringsmateriell. Slik systemet i det elektriske anlegget fungerer i dag vil ikke en vanlig sikring som sitter i sikringsskapet fange opp dette proble-met. En sikring vil bare slå seg ut når maksimalbelastning-en på en kurs kommer over en viss strømgrense. Every year, fires cause great value and many lives to be lost. In 2002, insurance companies in Norway paid out NOK 1.6 billion for fires in homes, and NOK 1.3 billion for fires in commercial buildings. According to statistics from the Directorate for Fire and Electrical Safety for 2001, a total of 65 people died in fires in Norway that year. 9% of these fires were caused by heat generation in sockets, switches and fuses. The way the system in the electrical system works today, a normal fuse in the fuse box will not catch this problem. A fuse will only trip when the maximum load on a course exceeds a certain current limit.
Det er tidligere kjent å koble termoelementer/-sikringer inn i elektriske artikler slik som hårfønere, skjøteled-ningstromler osv. slik at strømmen brytes når temperaturen stiger over en bestemt temperaturgrense. Hensikten er å beskytte de elektriske artiklene mot overoppvarming. Imidlertid er det bare selve den elektriske artikkelen som beskyt-tes. Oppstår det en feil i det elektriske anlegget for øv-rig, for eksempel i stikkontakten som utstyret er koblet til, vil dette ikke innvirke på termoelementet slik at det utløses. It is previously known to connect thermocouples/fuses into electrical articles such as hair dryers, extension cable reels, etc., so that the current is interrupted when the temperature rises above a certain temperature limit. The purpose is to protect the electrical articles from overheating. However, only the electrical article itself is protected. If there is a fault in the electrical system in general, for example in the socket to which the equipment is connected, this will not affect the thermocouple so that it is triggered.
Fra US patent 4 581 674 er det kjent en anordning for å sikre mot varmgang i det faste elektriske anlegg i hus. From US patent 4 581 674, a device is known to ensure against overheating in the fixed electrical installation in a house.
Fig. 2 viser hvordan termobrytere 20 og 25 er bygget inn i en elektrisk stikkontakt. Termobryterne er i form av smel-tesikringer. Anordningen er imidlertid noe upraktisk: Hvis bryterne utløses, må det hentes en elektriker som i praksis må skifte ut kontakten. Fig. 2 shows how thermal switches 20 and 25 are built into an electrical socket. The thermal switches are in the form of fuses. However, the device is somewhat impractical: if the switches are tripped, an electrician must be called in to replace the contact.
Norsk utlegningsskrift 307.727 viser en tilsvarende anordning. Her er det benyttet en smeltesikring som ved utløs-ning kortslutter en eller begge strømledninger mot jord. Derved utløses en jordfeilbryter slik at anlegget gjøres strømløst. Denne kretsen har igjen den ulempe at en aktive-ring av anordningen fordrer utskiftning av komponenter, hvilket innebærer at det må hentes fagkyndig hjelp. I til-legg har man den ulempe at hele anlegget blir stående uten strøm når jordfeilbryteren utløses, inkludert kjøleskap og frysere. Huset kan med andre ord ikke forlates over noen lengre tid med en slik anordning i strømnettet. En ytterli-gere ulempe er at anordningen forutsetter at anlegget er jordet, noe som ikke er blitt standard i Norge før i de senere år. Ved et eventuelt lynnedslag kan anlegget bli svek-ket med mulighet for senere varmgang, noe som dette systemet ikke vil fange opp. Norwegian design document 307,727 shows a similar device. Here, a fuse is used which, when tripped, short-circuits one or both power lines to earth. This triggers an earth fault circuit breaker so that the system is de-energized. This circuit again has the disadvantage that an activation of the device requires the replacement of components, which means that expert help must be obtained. In addition, you have the disadvantage that the entire system is left without power when the earth fault circuit breaker trips, including refrigerators and freezers. In other words, the house cannot be left for any length of time with such a device in the mains. A further disadvantage is that the device requires that the plant is earthed, which has not become standard in Norway until recent years. In the event of a lightning strike, the system may be weakened with the possibility of later overheating, which this system will not detect.
Det er også kjent kontaktorer utstyrt med standardiserte kontakter for innplugging av termoelementmoduler. Ved varmgang vil modulen trigge kontaktoren slik at den bryter laststrømmen. Feil i en last vil således bli fanget opp, men systemet vil ikke beskytte mot feil i selve kontaktoren. Videre er ikke modulen fast montert, og om det skulle oppstå en feil er det nærliggende å trekke ut modulen slik at kontaktoren går på igjen. Kretsen vil da ikke lenger være beskyttet. Etter en tid vil man ikke kunne vite hvilke kretser som er beskyttet eller ikke i et anlegg. Konstruk-sjonen er også bare egnet for kontaktorer ettersom andre installasjonselementer vanligvis ikke er utstyrt med egne bryterelementer. There are also known contactors equipped with standardized contacts for plugging in thermocouple modules. During warm-up, the module will trigger the contactor so that it breaks the load current. Faults in a load will thus be caught, but the system will not protect against faults in the contactor itself. Furthermore, the module is not permanently mounted, and if a fault should occur, it is obvious to pull out the module so that the contactor switches on again. The circuit will then no longer be protected. After a while it will not be possible to know which circuits are protected or not in a facility. The construction is also only suitable for contactors as other installation elements are not usually equipped with their own switch elements.
Formålet med den foreliggende oppfinnelsen er å forhindre at det oppstår branner som en følge av varmeutvikling i elektriske installasjoner slik som stikkontakter, brytere og sikringsmateriell. The purpose of the present invention is to prevent fires occurring as a result of heat generation in electrical installations such as sockets, switches and fuses.
Ifølge oppfinnelsen er det således tilveiebrakt en elektrisk installasjonsartikkel for fast montering i elektriske anlegg, omfattende en sikkerhetsinnretning i form av et termoelement som er permanent montert i den elektriske artikkelen, og idet termoelementet er elektrisk og termisk tilkoblet den elektriske artikkelen, som angitt i innled-ningen til det medfølgende krav 1. Installasjonsartikkelen er kjennetegnet ved at termoelementet er koblet i serie med installasjonsartikkelen, idet termoelementet er innrettet til selv å bryte strømmen når temperaturen overskrider en bestemt grenseverdi, og idet termoelementet er resettbart, og omfatter en resett-knapp for manuell tilbakestilling av termoelementet. According to the invention, there is thus provided an electrical installation article for fixed installation in electrical installations, comprising a safety device in the form of a thermocouple which is permanently mounted in the electrical article, and since the thermocouple is electrically and thermally connected to the electrical article, as indicated in the introduction ning to the accompanying claim 1. The installation article is characterized by the fact that the thermocouple is connected in series with the installation article, the thermocouple being arranged to break the current itself when the temperature exceeds a certain limit value, and the thermocouple being resettable, and including a reset button for manual resetting the thermocouple.
Den foreliggende oppfinnelse.vedrører innkobling av en sikkerhetsinnretning i form av et termoelement inn i installasjonsartikler slik som brytere, stikkontakter, koblingsbokser, fordelingsbokser, kontaktorer, sikringer osv. En slik sikkerhetsinnretning gjør at strømmen kuttes når temperaturen blir for høy. På denne måten unngås for høy varmgang og eventuelle branner som en følge av varmeutvikling. The present invention relates to the connection of a safety device in the form of a thermocouple into installation items such as switches, sockets, junction boxes, distribution boxes, contactors, fuses, etc. Such a safety device means that the current is cut off when the temperature becomes too high. In this way, excessive heating and possible fires as a result of heat generation are avoided.
Termosikringer er svært rimelige slik at produksjonskostna-den for en bryter eller stikkontakt med integrert sikkerhetsinnretning ikke øker så mye sammenliknet med dagens installasjonsartikler. Samtidig vil trolig forsikringsselskap redusere premiene for kunder som installerer brytere, sik-kerhetskontakter og andre installasjonsartikler med innkob-lede termosikringer. Thermal fuses are very reasonable so that the production cost of a switch or socket with an integrated safety device does not increase that much compared to today's installation items. At the same time, insurance companies will probably reduce premiums for customers who install switches, safety contacts and other installation items with connected thermal fuses.
Oppfinnelsen skal nå beskrives i detalj under henvisning til de vedlagte tegninger. Det skal forstås at tegningene kun viser utførelseseksempler, uten at de dermed skal opp-fattes å begrense oppfinnelsen. I tegningene er de relevan-te delene angitt med henvisningstall som også vil bli benyttet i det etterfølgende. Figur 1 er et riss av en stikkontakt der dekselet er tatt av og en sikkerhetsinnretning er innkoblet. Figur 2 viser en stikkontakt med deksel og en resett-knapp. Figur 3 viser inni en bryter der en sikkerhetsinnretning er innkoblet. The invention will now be described in detail with reference to the attached drawings. It should be understood that the drawings only show examples of execution, without them being understood as limiting the invention. In the drawings, the relevant parts are indicated with reference numbers which will also be used in what follows. Figure 1 is a drawing of a socket where the cover has been removed and a safety device is connected. Figure 2 shows a socket with a cover and a reset button. Figure 3 shows the inside of a switch where a safety device is connected.
Figur 4 viser en resett-knapp på en bryter. Figure 4 shows a reset button on a switch.
Figur 5 viser en automatsikring med innkoblet sikkerhetsinnretning. Figure 5 shows an automatic fuse with a connected safety device.
Figur 6 viser en automatsikring med resett-knapp. Figure 6 shows a circuit breaker with a reset button.
Det henvises til figur 1. Her vises et typisk eksempel på en stikkontakt 1 i samsvar med oppfinnelsen, der dekselet er tatt av og der det er tilkoblet en sikkerhetsinnretning 2. Sikkerhetsinnretningen 2 vil typisk være et termoelement /-sikring. Stikkontaktens kontaktflater er angitt med 3. LI og L2 betegner elektriske ledninger. Hvis det oppstår en varmgang i stikkontakten, for eksempel forårsaket av dårlig tilkobling eller materialsvakhet, vil termosikringen slå ut slik at strømmen i L2 ikke vil kunne gå igjennom kontakten lenger, slik at videre varmeutvikling stoppes. Reference is made to Figure 1. A typical example of a socket 1 in accordance with the invention is shown here, where the cover has been removed and where a safety device 2 is connected. The safety device 2 will typically be a thermocouple / fuse. The contact surfaces of the socket are indicated by 3. LI and L2 denote electrical wires. If there is a overheating in the socket, for example caused by a poor connection or material weakness, the thermal fuse will trip so that the current in L2 will no longer be able to pass through the socket, so that further heat generation is stopped.
Sikkerhetsinnretningen 2 kan selvfølgelig like gjerne være koblet til LI eller både LI og L2. For elektriske anlegg hvor man benytter fasespenning mot jord, kan sikkerhetsinnretningen kobles inn på ledningen mot jord. The safety device 2 can of course just as well be connected to LI or both LI and L2. For electrical installations where phase voltage to earth is used, the safety device can be connected to the line to earth.
Figur 2 viser en typisk stikkontakt ifølge oppfinnelsen med dekselet på. I denne fordelaktige utførelsesformen er stikkontakten 1 utstyrt med en resett-knapp 4 som vist i figur 2. Hvis stikkontakten gjentatte ganger slår seg ut er det varmgang i denne kontakten, og eventuelt fare for brann. Elektriker må da kontaktes for å sjekke denne fei-len. Det er ikke mulig å få strøm til å gå igjennom denne kontakten når termosikringen er slått ut. Figure 2 shows a typical socket according to the invention with the cover on. In this advantageous embodiment, the socket 1 is equipped with a reset button 4 as shown in figure 2. If the socket repeatedly switches off, this socket is overheating, and possibly a risk of fire. An electrician must then be contacted to check this error. It is not possible to get current to pass through this contact when the thermal fuse is switched off.
I figur 3 vises et typisk eksempel på en 1-polet bryter 10 med tilkoblet sikkerhetsinnretning 2. L betegner elektrisk ledning. Hvis det oppstår en varmgang i stikkontakten, for eksempel forårsaket av dårlig tilkobling eller materialsvakhet, vil termosikringen slå ut slik at strømmen i L ikke vil kunne gå igjennom kontakten lenger. Figure 3 shows a typical example of a 1-pole switch 10 with connected safety device 2. L denotes electric wire. If a overheating occurs in the socket, for example caused by a poor connection or material weakness, the thermal fuse will trip so that the current in L will no longer be able to pass through the socket.
For en 2-polet bryter kan sikkerhetsinnretningen 2 selvføl-gelig like gjerne være koblet til den ene eller den andre ledningen, eller eventuelt begge. For a 2-pole switch, the safety device 2 can of course just as well be connected to one or the other line, or possibly both.
En fordelaktig utførelsesform omfatter at en resett-knapp er anordnet rett innenfor bryterknappdekselet som vist i figur 4. Brukeren kan da bare vippe utbryterdekselet og re-<#>sette termosikringen. Hvis denne bryteren blir "resatt" og den slår seg ut gjentatte ganger, betyr det at det er varmgang i denne bryteren og eventuelt fare for brann. Brukeren må da kontakte elektriker for å sjekke bryteren. An advantageous embodiment includes that a reset button is arranged directly inside the switch button cover as shown in Figure 4. The user can then simply tilt the switch cover and reset the thermal fuse. If this switch is "reset" and it trips repeatedly, it means that this switch is overheating and possibly a fire hazard. The user must then contact an electrician to check the switch.
Sikkerhetsinnretningen 2 kan på samme måte kobles inn i koblingsbokser og fordelingsbokser. The safety device 2 can be connected in the same way to junction boxes and distribution boxes.
En sikkerhetsinnretning kan* også kobles inn i en automatsikring 15. Dette er vist i figur 5. Figur 6 viser en automatsikring med resett-knapp 4. A safety device can* also be connected to a circuit breaker 15. This is shown in figure 5. Figure 6 shows a circuit breaker with reset button 4.
Ved montering av disse faste installasjonsartiklene kan det settes opp informasjon i sikringsskapet som beskriver hvordan disse installasjonsartiklene fungerer. When installing these fixed installation items, information can be set up in the fuse box that describes how these installation items work.
Disse elektriske installasjonsartiklene med integrerte sik-kerhetsinnretninger er spesielt beregnet på sterkstrøman-legg, med 230/400 V. De kan også benyttes i trefaseinstal-lasjoner. These electrical installation articles with integrated safety devices are especially intended for high current installations, with 230/400 V. They can also be used in three-phase installations.
Claims (3)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20034680A NO317719B1 (en) | 2003-10-20 | 2003-10-20 | Safety device for installation materials |
| PCT/NO2004/000320 WO2005039010A1 (en) | 2003-10-20 | 2004-10-20 | An electrical fixture |
| EP04793697A EP1683249A1 (en) | 2003-10-20 | 2004-10-20 | An electrical fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20034680A NO317719B1 (en) | 2003-10-20 | 2003-10-20 | Safety device for installation materials |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO20034680D0 NO20034680D0 (en) | 2003-10-20 |
| NO20034680A NO20034680A (en) | 2004-12-06 |
| NO317719B1 true NO317719B1 (en) | 2004-12-06 |
Family
ID=29775099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20034680A NO317719B1 (en) | 2003-10-20 | 2003-10-20 | Safety device for installation materials |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1683249A1 (en) |
| NO (1) | NO317719B1 (en) |
| WO (1) | WO2005039010A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080191833A1 (en) * | 2005-05-25 | 2008-08-14 | Callsmart Uk Limited | Thermal Protection For Electrical Installations and Fittings |
| GB2464293A (en) * | 2008-10-09 | 2010-04-14 | Timothy Paul Jarvis | An automatic switching apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2629380A1 (en) * | 1976-06-30 | 1978-01-05 | Microtherm Gmbh | THERMAL SWITCH FOR MONITORING ELECTRICAL EQUIPMENT |
| US4581674A (en) * | 1983-03-30 | 1986-04-08 | General Electric Company | Thermal fuse device for protecting electrical fixtures |
| US5270799A (en) * | 1993-01-27 | 1993-12-14 | Therm-O-Disc, Incorporated | Manual reset thermostat switch |
| US5742464A (en) * | 1994-07-12 | 1998-04-21 | Ceola; Giacomo | Heat responsive power interrupting device |
| US5590010A (en) * | 1994-07-12 | 1996-12-31 | Ceola; Giacomo | Heat responsive power interrupting device |
| NO307727B1 (en) * | 1997-12-22 | 2000-05-15 | Siemens As | Procedure and system for serial protection |
-
2003
- 2003-10-20 NO NO20034680A patent/NO317719B1/en not_active IP Right Cessation
-
2004
- 2004-10-20 WO PCT/NO2004/000320 patent/WO2005039010A1/en active Search and Examination
- 2004-10-20 EP EP04793697A patent/EP1683249A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP1683249A1 (en) | 2006-07-26 |
| WO2005039010A1 (en) | 2005-04-28 |
| NO20034680A (en) | 2004-12-06 |
| WO2005039010A8 (en) | 2006-02-16 |
| NO20034680D0 (en) | 2003-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4168514A (en) | Combination circuit breaker-lightning arrestor | |
| US4858054A (en) | Protective circuits and devices for the prevention of fires | |
| US6577478B2 (en) | Overload circuit interrupter capable of electrical tripping and circuit breaker with the same | |
| ES2522849T3 (en) | Systems and methods to provide protection against arc failure and / or earth fault for distributed generation sources | |
| CN114144953B (en) | Solid state circuit breaker with galvanic isolation | |
| US7852607B2 (en) | Protection device with lockout test | |
| US7372678B2 (en) | Circuit interrupting device with automatic test | |
| US6204747B1 (en) | Safety devices for electrical circuits and systems | |
| US8605402B2 (en) | Heat sensor responsive to electrical overloads | |
| US8159803B2 (en) | Heat actuated interrupter receptacle | |
| US20100134932A1 (en) | Circuit interrupting device with reset lockout and reverse wiring protection and method of manufacture | |
| US20100046128A1 (en) | leakage current detection interrupter with fire protection means | |
| US6744254B2 (en) | Breaker failure annunciator system | |
| US20100073839A1 (en) | Systems and Methods for Detecting Unsafe Thermal Conditions in Wiring Devices | |
| JP4185666B2 (en) | Power shutoff method and power shutoff device | |
| US20060007610A1 (en) | Leakage current detector interrupter with reset lockout | |
| US20170331275A1 (en) | Reverse fault current interruptor and electrical power system employing the same | |
| EP1724803B1 (en) | Electronic device to be associated with an electrical apparatus | |
| Abd Azzis et al. | Automated electrical protection system for domestic application | |
| GB2466941A (en) | Consumer unit for housing residual current devices and miniature circuit breakers | |
| US4001804A (en) | Ground fault protection for electrical power distribution systems | |
| NO317719B1 (en) | Safety device for installation materials | |
| US20120069476A1 (en) | Thermally protected resettable GFCI | |
| AU2020204325B2 (en) | Apparatus, System and Method for Alarm Triggered Electrical Supply Disconnection | |
| US20200321766A1 (en) | Electric protection systems and methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CREP | Change of representative |
Representative=s name: OSLO PATENTKONTOR AS, POSTBOKS 7007, MAJORSTUEN, 0 |
|
| CB | Opposition filed (par. 26,5 patents act) |
Opponent name: ELKO AS, EYVIND LYCHES VEI 10, SANDVIKA, 1338, NO Effective date: 20050304 |
|
| MM1K | Lapsed by not paying the annual fees |