DK200000965A - Fremgangsmåde og system til seriefejlbeskyttelse - Google Patents
Fremgangsmåde og system til seriefejlbeskyttelse Download PDFInfo
- Publication number
- DK200000965A DK200000965A DK200000965A DKPA200000965A DK200000965A DK 200000965 A DK200000965 A DK 200000965A DK 200000965 A DK200000965 A DK 200000965A DK PA200000965 A DKPA200000965 A DK PA200000965A DK 200000965 A DK200000965 A DK 200000965A
- Authority
- DK
- Denmark
- Prior art keywords
- installation
- contact
- ground
- procedure
- heat generation
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
- H02H5/048—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch additionally responsive to excess current due to heating of the switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/767—Normally open
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
Description
Patentkrav 1. Fremgangsmåde til beskyttelse af en elektrisk installation mod seriefejl og omfattende - detektering af varmeudvikling ved specifikke punkter i installationen ved hjælp af individuelle sensor/kontaktenhe-der, der er forbundet med installationen, og - afbrydelse af strømtforsyningen til installationen, når varmeudviklingen overstiger et vist tærskelniveau, kendetegnet ved, at - at ved detektering af varmeudvikling, som overstiger tærskelniveauet forbindes i det mindste en fase til jord ved det pågældende punkt, hvorved der forekommer en jordfejl, og - at afbrydelsen af strømforsyningen til installationen sker ved hjælp af en jordlækage-kredsløbsafbryder, der er placeret mellem installationen og det dermed forbundne strømforsyningsnet. 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at i IT-netværker med isoleret nulpunkt ved detektering af varmeudvikling ud over tærskelniveauet vil i det mindste to faser blive forbundet til jord i det pågældende punkt, hvorved der vil opstå en jordfejl, selv om en af faserne har en konstant jordingsfejl. 3. System til beskyttelse af en elektrisk installation mod seriefejl og omfattende - individuelle sensor/kontaktenheder forbundet til installationen med varmeudviklingssensorer placeret ved specifikke beskyttelsespunkter i installationen, og en afbryder placeret mellem installationen og dens strømforsyning, - styreorganer mellem varmeudviklingssensorerne og afbryderen, kendetegnet ved, - at afbryderen er en jordlækage-kredsløbsafbryder og - at sensor/kontakenhedens styreorganer omfatter i det mindste en normalt åben kontakt placeret mellem i det mindste en fase og jord ved hvert beskyttelsespunkt og med en kontrolforbindelse mellem varmeudviklingssensoren og kontakten med det resultat, at når et specifikt tærskelniveau for varmeudvikling overskrides, vil kontakten blive sluttet, hvorved der skabes en jordfejl og jordlækage-kredsløbsafbryderen vil åbnes. 4. System ifølge krav 3, kendetegnet ved, at systemet yderligere omfatter et forbindelseskredsløb til forbindelse af sensor/kontakten-heden mellem to faser og jord. 5. System ifølge krav 4, kendetegnet ved, at sensor/kontaktenheden består af en transparent kapsel med en skruefjeder, som danner den normalt åbne kontakt, og hvis ene ende er i kontakt med beskyttelsespunktet, og hvis anden ende trykker mod et isolerende, smeltbart legeme, som danner varmeudviklingssensoren, med det resultat, at når et specifikt varmeudviklingsniveau overskrides vil det smeltbare legeme smelte og kontakten blive sluttet. 6. System ifølge et af kravene 3-5, kendetegnet ved, at det yderligere omfatter en resistor placeret mellem den normalt åbne kontakt og jord. 7. System ifølge krav 6, kendetegnet ved, at resistorens modstand er tilnærmelsesvis 3 kiloOhm. 8. System ifølge krav 7, kendetegnet ved, at resistoren er af en type, som brænder over på kontrolleret måde i tilfælde af konstant overbelastning. 9. System ifølge krav 5, kendetegnet ved, at kapslen er ca. 30 mm lang og har en diameter på ca. 3 mm. 10. Indretning til brug i et system til beskyttelse af en elektrisk installation mod seriefejl, hvilket system omfatter en kontakt i form af en jordlækage-kredsløbsafbryder placeret mellem installationen og dens strømforsyning, kendetegnet ved at omfatte - en første kontakt til et beskyttelsespunkt, - en anden kontakt til jord, eventuelt gennem en resistor, - en varmeudviklingssensor placeret mellem de to kontakter og indrettet på en sådan måde, at en varmeudvikling, der overstiger et tærskelniveau, vil bringe de to kontakter i indbyrdes forbindelse, hvorved beskyttelsespunktet jordforbindes, jordlækage-kredsløbsafbryderen trigges, og strømforsyningen til installationen afbrydes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO976052A NO307727B1 (no) | 1997-12-22 | 1997-12-22 | Fremgangsmåte og system for seriefeilvern |
PCT/NO1998/000388 WO1999033155A1 (en) | 1997-12-22 | 1998-12-21 | Method and system for series fault protection |
Publications (1)
Publication Number | Publication Date |
---|---|
DK200000965A true DK200000965A (da) | 2000-08-16 |
Family
ID=19901482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK200000965A DK200000965A (da) | 1997-12-22 | 2000-06-21 | Fremgangsmåde og system til seriefejlbeskyttelse |
Country Status (7)
Country | Link |
---|---|
US (1) | US6621677B1 (da) |
AU (1) | AU2190399A (da) |
DK (1) | DK200000965A (da) |
FI (1) | FI117360B (da) |
NO (1) | NO307727B1 (da) |
SE (1) | SE518264C2 (da) |
WO (1) | WO1999033155A1 (da) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO20034680A (no) * | 2003-10-20 | 2004-12-06 | Paul Middelhuis | Sikkerhetsinnretning ved installasjonsmateriell |
US7451012B2 (en) * | 2007-02-21 | 2008-11-11 | Gree Electric Applicances Inc. Of Zhuhai | Fault electric arc protection circuits and method for detecting fault electric arc |
GB2471869B (en) | 2009-07-15 | 2012-04-25 | Vishay Resistors Belgium Bvba | Thermal switch |
FR2979149B1 (fr) * | 2011-08-18 | 2014-05-30 | Cyril Charles | Dispositif de surveillance thermique des bornes d'un dispositif de connexion electrique |
US8964339B2 (en) | 2012-03-30 | 2015-02-24 | Yazaki North America, Inc. | Faulty protective earth ground circuit detection system and method |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3872355A (en) * | 1973-09-18 | 1975-03-18 | Gen Electric | Fire detection and projection circuit and device |
DE3229020C2 (de) | 1982-08-04 | 1985-10-31 | Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart | Einrichtung zur Anzeige einer Übertemperatur eines elektrischen Leiters |
GB2156154A (en) | 1984-03-19 | 1985-10-02 | Edward George Henry Read | Temperature sensors |
DE3526007C2 (de) * | 1984-07-20 | 1999-11-11 | Papst Licensing Gmbh & Co Kg | Schaltungsanordnung zum Ansteuern eines kollektorlosen, an ein Gleichstromnetz angeschlossenen Gleichsstrommotors |
US4858054A (en) * | 1985-05-07 | 1989-08-15 | Franklin Frederick F | Protective circuits and devices for the prevention of fires |
US4763365A (en) * | 1987-04-15 | 1988-08-16 | Tolo, Inc. | Spa system having high temperature safety device |
US5193044A (en) * | 1990-08-29 | 1993-03-09 | Alcatel Network Systems, Inc. | Apparatus for line card power cross protection |
DK173739B1 (da) | 1993-03-15 | 2001-08-27 | Egon Geertsen | Sikkerhedsafbryder |
US5627719A (en) | 1993-08-17 | 1997-05-06 | Gaston; William R. | Electrical wiring system with overtemperature protection |
US5805399A (en) * | 1996-09-06 | 1998-09-08 | Everbrite, Inc | Apparatus for detecting luminous tube and power supply faults where ground fault currents may be absent |
US5844761A (en) * | 1997-11-24 | 1998-12-01 | Place, Iv; Oliver Rex | Device for circuit board power surge protection such as protection of telecommunication line cards from lightning and power cross conditions |
-
1997
- 1997-12-22 NO NO976052A patent/NO307727B1/no not_active IP Right Cessation
-
1998
- 1998-12-21 US US09/581,943 patent/US6621677B1/en not_active Expired - Lifetime
- 1998-12-21 AU AU21903/99A patent/AU2190399A/en not_active Abandoned
- 1998-12-21 WO PCT/NO1998/000388 patent/WO1999033155A1/en active IP Right Grant
-
2000
- 2000-06-19 SE SE0002269A patent/SE518264C2/sv not_active IP Right Cessation
- 2000-06-21 DK DK200000965A patent/DK200000965A/da not_active Application Discontinuation
- 2000-06-21 FI FI20001481A patent/FI117360B/fi not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE0002269L (sv) | 2000-08-16 |
FI20001481A (fi) | 2000-06-21 |
US6621677B1 (en) | 2003-09-16 |
NO976052L (no) | 1999-06-23 |
NO976052D0 (no) | 1997-12-22 |
WO1999033155A1 (en) | 1999-07-01 |
SE0002269D0 (sv) | 2000-06-19 |
AU2190399A (en) | 1999-07-12 |
FI117360B (fi) | 2006-09-15 |
SE518264C2 (sv) | 2002-09-17 |
NO307727B1 (no) | 2000-05-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AHS | Application shelved for other reasons than non-payment |