NO753942L - - Google Patents
Info
- Publication number
- NO753942L NO753942L NO753942A NO753942A NO753942L NO 753942 L NO753942 L NO 753942L NO 753942 A NO753942 A NO 753942A NO 753942 A NO753942 A NO 753942A NO 753942 L NO753942 L NO 753942L
- Authority
- NO
- Norway
- Prior art keywords
- weight
- parts
- flame
- oxygen index
- conductors
- Prior art date
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 239000004800 polyvinyl chloride Substances 0.000 claims description 11
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 5
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 4
- ZVFDTKUVRCTHQE-UHFFFAOYSA-N Diisodecyl phthalate Chemical compound CC(C)CCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC(C)C ZVFDTKUVRCTHQE-UHFFFAOYSA-N 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims 3
- -1 polyethylene Polymers 0.000 claims 3
- 229920000573 polyethylene Polymers 0.000 claims 3
- 239000004743 Polypropylene Substances 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 229920001155 polypropylene Polymers 0.000 claims 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
Description
Foreliggende oppfinnelse angår en flammebestandig kabel og særlig en flammebestandig kabel for bruk i telekommunikasjons-sentraler, hvilken kabel består av plastisolerte ledere omgitt av en plastkappe, og hvilken kabel har forbedrede elektriske egenskaper og/eller mindre dimensjoner. The present invention relates to a flame-resistant cable and in particular a flame-resistant cable for use in telecommunications centers, which cable consists of plastic-insulated conductors surrounded by a plastic sheath, and which cable has improved electrical properties and/or smaller dimensions.
Sentralbordkabler benyttes vanligvis til å forbinde elektrisk-og/eller elektronisk utstyr eller apparatur, f. eks. innen telefon-sentraler, og er anbragt i kort avstand fra hverandre. Slike kabler er stort sett anbragt i innelukkede kanaler, og det stilles strenge krav til slike kablers flammebestandighet fordi brann i slike kabler vil ha store konsekvenser. Switchboard cables are usually used to connect electrical and/or electronic equipment or apparatus, e.g. within telephone exchanges, and are placed a short distance from each other. Such cables are mostly placed in enclosed ducts, and strict requirements are placed on the flame resistance of such cables because a fire in such cables will have major consequences.
Det er tidligere utviklet sentralbordkabler som oppfyller al-Switchboard cables have previously been developed that meet all
le slike krav, og disse kablene består av polyvinylklorid (PVC)meet such requirements, and these cables consist of polyvinyl chloride (PVC)
- isolerte ledere og er forsynt med en PVC kappe. Imidlertid har slike konvensjonelle sentralbordkabler en ulempe som gjør det tvil-somt hvorvidt slike kabler kan benyttes i den ovennevnte type utstyr når man tar i betraktning den stadig økende bruk av elektro-niske kretser. De konvensjonelle, flammesikre sentralbordkabler har således en gjensidig kapasitans som gjør at de tilkoblede elektro-niske kretser kan bli påvirket på en ufordelaktig måte. - insulated conductors and are provided with a PVC jacket. However, such conventional switchboard cables have a disadvantage which makes it doubtful whether such cables can be used in the above-mentioned type of equipment when one takes into account the ever-increasing use of electronic circuits. The conventional, flame-resistant switchboard cables thus have a mutual capacitance which means that the connected electronic circuits can be adversely affected.
Formålet med foreliggende oppfinnelse er således å tilveiebrin-ge en sentralbordkabel som i sammenligning med konvensjonelle sentralbordkabler har meget bedre elektriske egenskaper eller mindre dimensjoner med uendret elektriske egenskaper. De flammebestandi- The purpose of the present invention is thus to provide a switchboard cable which, in comparison with conventional switchboard cables, has much better electrical properties or smaller dimensions with unchanged electrical properties. The flame-resistant
ge egenskaper til den nyutviklede sentralbordkabel må minst være så gode som eller endog bedre enn for konvensjonelle sentralbord-kabeler properties of the newly developed switchboard cable must be at least as good as, or even better than, conventional switchboard cables
Dette oppnås ved å utforme kabelen i overensstemmelse med de nedenfor fremsatte patentkrav. This is achieved by designing the cable in accordance with the patent claims set out below.
Ytterligere fordeler ved foreliggende oppfinnelse vil fremgå klart av nedenstående detaljerte beskrivelse. Further advantages of the present invention will be clear from the detailed description below.
En kabel i henhold til foreliggende oppfinnelse har en kabel-kjerne hvis ledere er isolert med PE, oppskummet PE, eller PP, og er dessuten forsynt med en PVC kappe med en oxygen-indeks som er en funksjon av vektforholdet mellom PVC isolasjonen til kabelkappen og isolasjonsmaterialet til lederne pr. lengdeenhet av kabelen. A cable according to the present invention has a cable core whose conductors are insulated with PE, foamed PE, or PP, and is also provided with a PVC jacket with an oxygen index that is a function of the weight ratio between the PVC insulation of the cable jacket and the insulation material for the conductors per length unit of the cable.
Som et mål på flammebestandigheten til en masse benyttes oxygen-indeksen som definert av Fenimore og Martin. Ifølge definisjon-en av dette uttrykket, vil ikke-flambarheten øke eller flambarheten avta med oxygen-indeksen. I henhold til kjente testmetoder vil lang-somtbrennende masser være kjennetegnet ved en oxygen-indeks mellom 22 og 27, mens selvslukkende masser har en oxygen-indeks på over 27. As a measure of the flame resistance of a mass, the oxygen index as defined by Fenimore and Martin is used. According to the definition of this expression, the non-flammability will increase or the flammability will decrease with the oxygen index. According to known test methods, slow-burning masses will be characterized by an oxygen index between 22 and 27, while self-extinguishing masses have an oxygen index of over 27.
Under den praktiske fremstilling av den nye kabelen med PVC kabelkappe og PE isolerte ledere, viser det seg at den ønskede flammebestandighet fås dersom betingelsene som er oppstilt i nedenstående tabell er tilfredsstilt: During the practical production of the new cable with PVC cable jacket and PE insulated conductors, it turns out that the desired flame resistance is obtained if the conditions set out in the table below are satisfied:
Ifølge ytterligere trekk ved foreliggende oppfinnelse kan disse oxygen-indekser oppnås med en kabelmantel-masse som består av According to further features of the present invention, these oxygen indices can be achieved with a cable jacket mass consisting of
100 vektdeler PVC100 parts by weight PVC
40 -60 vektdeler diisodesylphtalat40 -60 parts by weight of diisodecyl phthalate
5 -15 vektdeler klorinert parafin,5 -15 parts by weight of chlorinated paraffin,
3 -10 vektdeler antimontrioksyd3-10 parts by weight of antimony trioxide
5 -30 vektdeler zinkborat5-30 parts by weight zinc borate
Den nye sentralbordkabelen i henhold til foreliggende oppfinnelse har en f lammebestandighet som er lik eller bedre en^/for kjente PVC sentralbordkabler. Dette ble påvist under testing av én kabelbunt hvor også grenseverdiene for oxygenindeksen til PVC-kappen ble funnet for de spesifiserte vektforhold av kappematerialet (PVC) i forhold til lederisolasjonsmaterialet. De gjen-sidige kapasitanser til den nye kabelen er omkring 50% lavere og dempningen er redusert med omkring 25% i forhold til konvensjonelle sentralbordkabler. The new switchboard cable according to the present invention has a flame resistance equal to or better than known PVC switchboard cables. This was demonstrated during testing of one cable bundle where the limit values for the oxygen index of the PVC sheath were also found for the specified weight ratios of the sheath material (PVC) in relation to the conductor insulation material. The mutual capacitances of the new cable are about 50% lower and the attenuation is reduced by about 25% compared to conventional switchboard cables.
Hvis det er mindre viktig å oppnå de gode elektriske egenskaper, noe som kan forekomme i bestemte anvendelser, vil man med foreliggende kabel isteden kunne redusere dimensjonene til kabelen, ved å bygge den opp på den måte som er angitt i de nedenfor framsatte patentkrav If it is less important to achieve the good electrical properties, which can occur in certain applications, with the present cable it will instead be possible to reduce the dimensions of the cable, by building it up in the manner indicated in the patent claims presented below
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742455780 DE2455780A1 (en) | 1974-11-26 | 1974-11-26 | Difficulty combustible cables - with PVC compsn. sheath and polyethylene insulated core conductors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO753942L true NO753942L (en) | 1976-05-28 |
Family
ID=5931718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO753942A NO753942L (en) | 1974-11-26 | 1975-11-24 |
Country Status (10)
| Country | Link |
|---|---|
| AU (1) | AU8658375A (en) |
| BE (1) | BE835747A (en) |
| BR (1) | BR7507562A (en) |
| DE (1) | DE2455780A1 (en) |
| ES (1) | ES442987A1 (en) |
| IN (1) | IN141269B (en) |
| NL (1) | NL7513168A (en) |
| NO (1) | NO753942L (en) |
| SE (1) | SE7513147L (en) |
| ZA (1) | ZA757214B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5600097A (en) * | 1994-11-04 | 1997-02-04 | Lucent Technologies Inc. | Fire resistant cable for use in local area network |
-
1974
- 1974-11-26 DE DE19742455780 patent/DE2455780A1/en active Pending
-
1975
- 1975-11-11 NL NL7513168A patent/NL7513168A/en unknown
- 1975-11-13 AU AU86583/75A patent/AU8658375A/en not_active Expired
- 1975-11-14 BR BR7507562*A patent/BR7507562A/en unknown
- 1975-11-18 ZA ZA757214A patent/ZA757214B/en unknown
- 1975-11-20 BE BE2054664A patent/BE835747A/en unknown
- 1975-11-24 SE SE7513147A patent/SE7513147L/en unknown
- 1975-11-24 NO NO753942A patent/NO753942L/no unknown
- 1975-11-26 ES ES442987A patent/ES442987A1/en not_active Expired
- 1975-12-06 IN IN2312/CAL/75A patent/IN141269B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE835747A (en) | 1976-05-20 |
| IN141269B (en) | 1977-02-12 |
| AU8658375A (en) | 1977-05-19 |
| ZA757214B (en) | 1976-11-24 |
| SE7513147L (en) | 1976-05-28 |
| NL7513168A (en) | 1976-05-31 |
| BR7507562A (en) | 1976-08-10 |
| ES442987A1 (en) | 1977-07-16 |
| DE2455780A1 (en) | 1976-08-12 |
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