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1 electric insulating material
Большой англо-русский и русско-английский словарь > electric insulating material
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2 electric insulating material
Англо-русский словарь технических терминов > electric insulating material
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3 electric insulating material
Техника: электроизоляционный материалУниверсальный англо-русский словарь > electric insulating material
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4 insulating material
изоляционный материал
изолятор
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[IEV number 151-15-35]EN
insulating material
insulant
material used to prevent electric conduction between conductive elements
NOTE – In the field of electromagnetism the term "insulant" is also used as a synonym for "insulating medium".
Source: 212-01-01 MOD, IEC 60050-121
[IEV number 151-15-35]FR
isolant, m
matériau isolant, m
matériau destiné à empêcher la conduction électrique entre des éléments conducteurs
NOTE – En électromagnétisme le terme "isolant" est aussi utilisé comme synonyme de "milieu isolant".
Source: 212-01-01 MOD, CEI 60050-121
[IEV number 151-15-35]Синонимы
EN
DE
FR
- isolant, m
- matériau isolant, m
3.4 диэлектрик (insulating material): Материал с вертикальным сопротивлением более 1014 Ом.
Источник: ГОСТ Р 53734.4.1-2010: Электростатика. Часть 4.1. Методы испытаний для прикладных задач. Электрическое сопротивление напольных покрытий и установленных полов оригинал документа
Англо-русский словарь нормативно-технической терминологии > insulating material
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5 material
1) материал; вещество2) ткань, материал3) мн. ч. детали ( для обработки)•to calibrate a material — (точно) определять свойства материала-
ablative material
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abrasive material
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absorbent material
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acceptor material
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acoustical material
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acoustic material
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active laser material
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active material
-
adding material
-
advanced material
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air-equivalent material
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air-wall material
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amorphous magnetic material
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anisotropic material
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anodic material
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antiferroelectric material
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antiferromagnetic material
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antifriction material
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antihalation material
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antirot material
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antislip material
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antisun material
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asbestos-cement material
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atmospheric reentry material
-
attached foreign material
-
backfilling material
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backfill material
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backing material
-
barrier material
-
base material
-
basic material
-
batch material
-
bed material
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bimetallic conductor material
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binding material
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bituminous material
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black-and-white material
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blanket material
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bonding material
-
borrow material
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bottoming material
-
bred material
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breeder material
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brittle material
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bubble material
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building material
-
bulk material
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bulk semiconductor material
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burden material
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carbon electrical material
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carrier material
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case material
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cast stone material
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caved material
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cementing material
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ceramic foam material
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ceramic material
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charge material
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charging material
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clad dielectric material
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clad material
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coal-tar raw material
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coating material
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coherent material
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cohesionless material
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cohesive material
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coiled material
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cold-charged material
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color material
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combustible material
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combustion materials
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compact material
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composite material
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compounding material
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concrete materials
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conducting material
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conductor material
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constant bandgap material
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constructional material
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contact conductor material
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core material
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corrosion-resistance material
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cover material
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covering material
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crib material
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crucible material
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crystalline material
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cushioning material
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damping material
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degenerative semiconductor material
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diamagnetic material
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dielectric material
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difficult-to-cut material
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diffusion transfer material
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direct bandgap material
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discrete material
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disordered material
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dolomite-based material
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dopant material
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doping material
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dredged material
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ductile material
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dye bleach material
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earthy raw materials
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elastic material
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electret material
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electric contact material
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electric insulating material
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electrochromic material
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electrode material
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electroluminescent material
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electronic-grade material
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electronic material
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electrooptical material
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electrooptic material
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electrostrictive material
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electrotechnical material
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ENG/EFP tape material
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engineering material
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epitaxial material
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evaporated material
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evaporation material
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excavated material
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excessive uncut material
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expanded material
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explosive material
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extraneous material
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extraterrestrial material
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extrinsic material
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fabric-filled molding material
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facing material
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feed material
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ferrimagnetic material
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ferroelectric material
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ferromagnetic material
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ferrous material
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fertile material
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fettling material
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fiber glass material
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fiber-filled molding material
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fiber-forming material
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fiber-reinforced material
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fibrous material
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filling material
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finished material
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finishing material
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fireclay material
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fired material
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fireproof material
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fire-resistant material
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fissile material
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fissionable material
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fission material
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flammable material
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float material
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fluxing material
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foam material
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foam-type refractory material
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food raw material
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foreign material
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foundation material
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frost-resistant material
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fuel material
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fungicidal packaging material
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gaseous fissionable material
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gasket material
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glass-bonded reinforced dielectric material
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glass-bonded dielectric material
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glass-ceramic material
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glass-fiber material
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glass-forming material
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graded bandgap material
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granular material
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greasy material
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grinding material
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gunned material
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half-finished material
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hard material
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hard-magnetic material
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hard-to-machine material
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heat-insulating material
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heat-resistant material
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heat-resisting conductor material
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heat-resisting material
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heat-softenable material
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heat-transfer material
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high-alloy material
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high-coercivity material
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high-conductivity material
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high-definition material
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high-expansion material
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high-performance material
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high-resistivity material
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high-resolution material
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high-Z material
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honeycombed material
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honeycomb material
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host material
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hot material
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hydraulic insulating material
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hydrocarbon material
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hyperconductor material
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ideal granular material
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imaging material
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incombustible material
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inedible raw material
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inedible material
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inert material
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inflammable material
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in-process material
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insulating material
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intergranular material
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intermediate material
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intrinsic material
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isotropic material
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jointing material
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joint-sealing material
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laminated material
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large-gap material
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laser material
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lasing material
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library material
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light-sensitive material
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linearly elastic material
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lining material
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liquid fissionable material
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loading material
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loose material
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lossy material
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lost circulation material
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low-bandgap material
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low-gap material
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low-coercitivity material
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low-expansion material
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low-loss material
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low-mobility photovoltaic material
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low-resistivity material
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lump material
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magnetic material
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magnetically hard material
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magnetically soft material
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magnetodielectric material
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magnetooptic material
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magnetostrictive material
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man-made material
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materials of construction
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metallic conductor material
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metallic material
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mine-run material
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minus material
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molding material
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monocrystalline material
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multicorrugating material
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multilayer conductor material
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multilayer material
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narrow-bandgap material
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natural material
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negative electron affinity material
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negative material
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negative-image material
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nonabrasive material
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noncoherent material
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noncombustible material
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nonconductivity material
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nonfired material
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nonflammable material
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nonfood raw material
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nonmagnetic material
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nonretentive material
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nonsilver material
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nonterrestrial material
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n-type material
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nuclear material
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oil-resistant material
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optical material
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oversize material
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oxide-metal material
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packaging material
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packing material
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paintwork material
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paramagnetic material
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parent material
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patching material
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pavement material
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paving material
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phosphor material
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photochromic material
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photoconductive material
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photographic material
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photoresponsive material
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photosensitive material
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phototropic material
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photovoltaic material
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piezoelectric material
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plastic material
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polycrystalline material
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poromeric material
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positive electron affinity material
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positive material
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positive-image material
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preformed material
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pressure sensitive material
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prestrained material
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p-type material
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pulp-making material
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pyroelectric material
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ramming material
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random material
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rapid-access photographic material
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raw material
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receiving material
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recording material
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recycled material
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reference nuclear materials
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refractory conductor material
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refractory material
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reject material
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rejected material
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resistance material
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resistive material
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retentive material
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returned fissile material
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reversal material
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road-building material
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roll material
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roll-compacted powder material
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rooting material
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rough material
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rubber-cord material
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rubber-like material
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rubber-reinforced material
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rubbery material
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sandwiched material
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scrap material
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sealing material
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secondary hardening material
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secondary raw materials
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self-adhesive material
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self-developing material
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semiconducting material
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semiconductive material
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semisolid bituminous materials
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sensitive material
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sheet material
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shielding material
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silicate concrete material
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silverless material
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sintered material
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sintered metal-powder material
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slagging material
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slip-cast material
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soft material
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soft-magnetic material
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solar energy storage material
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solid bituminous material
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solid fissionable material
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solid-foamed material
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solvent-resistant material
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sound-absorbing material
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sound-insulating material
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space-manufactured material
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spalling-resistant material
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special fissionable material
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square-loop material
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standard nuclear materials
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starting material
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stealth material
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stemming material
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stowing material
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structural material
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superconducting material
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superconductive material
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superrefractory material
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surface-active material
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surface-inactive material
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tamping material
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tar-dolomite material
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tar-stabilized dolomite material
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temperature sensitive material
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termination material
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textured material
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thermographic material
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thermomagnetic material
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thermosetting material
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thermost material
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timber-based material
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tool material
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tree-length material
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two-gap material
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two-valley material
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ultrarefractory material
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unclad dielectric material
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undersize material
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upholstery material
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vaporproof material
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vesicular material
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video material
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vitrocrystalline material
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wall-building material
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washing material
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waste material
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waterproofing material
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web material
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weighting material
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widebandgap material
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widegap material
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wood raw material
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work material -
6 material
материал; вещество || материальный; вещественныйmaterial being cut — материал, обрабатываемый резанием; разрезаемый материал
material being fed — подаваемый материал, продвигаемый материал
material being machined — материал, обрабатываемый на станке, материал, обрабатываемый на металлорежущем станке
- abrasive materialmaterial to be routed — материал, обрабатываемый на быстроходном фасонно-фрезерном станке
- absorbing material
- absorption material
- acidproof material
- acid-resisting material
- activated material
- active material
- add material
- adding material
- adhering molding material
- alloy materials
- alloying material
- alternate material
- antifriction material
- antislip material
- architectural material
- as-received material
- audiovisual material
- auxiliary material
- backing material
- bad material
- balled material
- base material
- basic material
- bead material
- bearing material
- best quality materials
- binder material
- binding material
- bonding material
- brazing material
- brittle material
- building material
- bulk material
- burden material
- carbide material
- carbon electric material
- carbon electrical material
- carbonaceous reducing material
- carburizing material
- casthouse materials
- categorized material
- ceramic material
- certified reference material
- charge material
- charging material
- clad material
- cleansing material
- coating material
- coiled material
- cold-charged material
- cold-worked material
- combustible material
- commercial material
- composite material
- composite metallic material
- composition material
- compound material
- conducting material
- contact conductor material
- container material
- controlled-porosity material
- core material
- corrosion-resisting material
- creep strained material
- critical material
- crucible material
- cushioning material
- cutting material
- cutting-tool material
- cycled material
- damping material
- deep-coat material
- defective material
- defense material
- depleated material
- diamagnetic material
- difficult-to-cut material
- difficult-to-machine material
- dispersion-hardened material
- dispersion-strengthened material
- dissimilar materials
- dissipative material
- document material
- dolomite-based material
- ductile material
- easy-to-cut material
- elastomeric material
- electric contact material
- electrical engineering material
- electrically active polymeric material
- electrically insulating material
- electrode material
- electrotechnical material
- elongated material
- emitting material
- engineering materials
- enriched material
- environmentally resilient material
- epoxy matrix material
- excessive uncut material
- extraneous material
- extreme pressure material
- facing material
- feed material
- ferrimagnetic material
- ferroelectric material
- ferromagnetic material
- ferrous materials
- fettling material
- fiber material
- fiber-reinforced material
- fiber-strengthened material
- fibrous composite material
- fibrous material
- filling material
- fine material
- flexible-heavy material
- fluid-extruded material
- fluorescent material
- fluxing material
- foreign material
- free-cutting material
- free-machining material
- friction material
- fuel material
- fully dense material
- fully fired material
- fully flattened material
- grain material
- granular material
- grinding material
- half-finished material
- hard material
- hard-magnetic material
- hard-to-cut material
- hard-to-machine material
- hard-to-punch material
- heat-absorbing material
- heat-conductive material
- heat-insulating material
- heat-resistant material
- heat-sensitive material
- heat-transfer material
- heavily alloyed material
- heavy material
- heavy-duty material
- heavy-gravity material
- high-coercivity material
- high-conductivity material
- high-force material
- high-friction material
- high-melting-point material
- high-resistivity material
- high-strength material
- high-technology materials
- high-temperature-resistant material
- high-tempering temperature material
- high-tensile strength material
- honest material
- host material
- hot-finished material
- hyperconductor material
- ideally plastic material
- imperfect material
- incombustible material
- incoming materials
- incompressible material
- inert material
- inflammable material
- ingoing material
- in-process material
- instructional material
- insulating material
- insulation material
- intermediate material
- iron-bearing material
- isotropic material
- jointing material
- lagging material
- laser material
- light material
- light-duty material
- light-stiff material
- limy material
- lining material
- loading material
- loose material
- low-ash reducing material
- low-coercivity material
- low-density material
- low-expansion material
- low-grade material
- low-strength material
- low-temperature material
- low-tensile strength material
- luminescent material
- lump material
- magnetic material
- magnetostrictive material
- material of construction
- material of high-absorbing power
- material of high-electric conductivity
- material of low-absorbing power
- material of low-machinability rating
- matrix material
- medium-strength material
- mix material
- moderator material
- mold material
- molding material
- multilayer bearing material
- multilayer conductor material
- multilayer material
- multimedia materials
- natural material
- no-coolant material
- noise-attenuating material
- nonabsorbent material
- noncombustible material
- nonconducting material
- noncrystalline material
- nonferromagnetic material
- nonferrous materials
- nonmagnetic material
- nonproduction material
- off-gage material
- oil-attracting material
- original material
- oversized material
- oxidizing material
- packing material
- paint material
- paramagnetic material
- parent material
- particulate material
- perfect material
- phase change material
- photoelectric material
- piezoelectric material
- plastic material
- plus material
- PM material
- polycrystalline material
- polymeric material
- poor heat conducting material
- poor machinability material
- pore-forming material
- positive active material
- powder material
- powder metallurgical material
- powdered material
- powdered refractory material
- preformed material
- prehardened material
- prepared burden materials
- prestrained material
- problem material
- radioactive material
- random material
- raw material
- recycled material
- reducing material
- reference material
- refractory backing material
- refractory conductor material
- refractory material
- refused material
- reinforced material
- rejected material
- remove material
- resistive material
- return material
- rework material
- roll-compacted powder material
- rolled sheet material
- rolling material
- rust-inhibiting material
- saleable material
- sandwiched material
- sandwich-type material
- scattering material
- scrap material
- sealant material
- sealing material
- secondary raw materials
- section material
- semiconducting material
- semiconductive material
- semifinished material
- semimanufactured material
- sheet material
- sheet-like material
- shell-mold material
- shield material
- shielding material
- shipbuilding material
- short-chipping material
- siliceous material
- siliceous refractory material
- sintered bearing material
- sintered material
- sintered metal-powder material
- slag-forming material
- slagging material
- soft material
- soft-magnetic material
- solid material
- sorted secondary raw materials
- sound-absorbing material
- sound-deadening material
- spent material
- spongy material
- sprayed material
- square-loop material
- standard cubic material
- standard material
- starting material
- stock material
- stopping material
- strain-hardened material
- strain-rate-resistive material
- strong material
- structural material
- stuffing material
- substrate material
- superconducting material
- superconductor material
- support material
- surface-active material
- suspended material
- tar-dolomite material
- target material
- tar-stabilized dolomite material
- test material
- test piece material
- textured material
- thermal insulating material
- thermally insulating material
- thermal-resistant material
- thermoplastic material
- thermosetting material
- titanium-base material
- tooling material
- tough material
- tough-to-machine material
- tracer material
- undersize material
- unprotected material
- unsized burden material
- vibration-deadening material
- virgin material
- viscoelastic material
- vitrified material
- waste material
- wearable material
- web material
- weighing material
- weld material
- welding wire material
- work material
- work-hardening material
- worthless material
- xerographic materialsEnglish-Russian dictionary of mechanical engineering and automation > material
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7 verification of resistance of insulating materials to abnormal heat and fire due to internal electrical effects
- проверка стойкости изоляции к аномальной температуре нагрева и огню, вызванным электрическими явлениями внутри НКУ
проверка стойкости изоляции к аномальной температуре нагрева и огню, вызванным электрическими явлениями внутри НКУ
Входит в переченьт проверок и испытаний, проводнимых на НКУ при типовых испытаниях
[ ГОСТ Р 51321. 3-99 ( МЭК 60439-3-90)]Параллельные тексты EN-RU
[BS EN 61439-1:2009]
[ ГОСТ Р МЭК 61439.1-2013]
[Перевод Интент]
8.1.5.3 Resistance of insulating materials to abnormal heat and fire due to internal electric effects
8.1.3.2.3 Устойчивость изоляционных материалов к аномальному нагреву и огню вследствие внутренних электромагнитных процессов
8.1.3.2.3 Стойкость изоляционных материалов к аномальному тепловому воздействию и огню, вызванными электрическими явлениями внутри НКУ
Insulating materials used for parts necessary to retain current carrying parts in position and parts which might be exposed to thermal stresses due to internal electrical effects, and the deterioration of which might impair the safety of the ASSEMBLY, shall not be adversely affected by abnormal heat and fire and shall be verified by the glow-wire test in 10.2.3.3.
Части из изоляционных материалов, удерживающие токопроводящие части, и части, подвергаемые тепловым нагрузкам в результате внутренних электромагнитных процессов, повреждение которых может снизить безопасность применения НКУ, не должны поврежгаться аномальным нагревом и огнем; их соответствие проверяют испытанием раскаленной проволокой согласно 10.2.3.3.
Изоляционные материалы, из которых изготовлены части НКУ, используемые для крепления токоведущих деталей, и части, которые могут подвергаться тепловому воздействию, обусловленному электрическими явлениями внутри НКУ, и ухудшение параметров которых может снизить безопасность эксплуатации НКУ, не должны подвергаться аномальному тепловому воздействию и огню. Стойкость этих материалов проверяют нагретой проволокой согласно п. 10.2.3.3.
For small parts (having surface dimensions not exceeding 14 mm x 14 mm), an alternative test may be used (e.g. needle flame test, according to IEC 60695-11-5).
Для небольших частей размерами не более 14x14 мм можно провести альтернативное испытание (например, испытание игольчатым пламенем по IEC 60695-11-5).
Небольшие (не более 14х14 мм) части можно подвергнуть альтернативному испытаю, например, игольчатым пламенем в соответствии с МЭК 60695-11-5.
The same procedure may be applicable for other practical reasons where the metal material of a part is large compared to the insulating material.
Это же испытание допускается проводить и по другим причинам, например, когда металлическая составляющая части НКУ слишком велика по сравнению с составляющей из изоляционного материала.
Это же альтернативное испытание можно применить, если, какая-либо часть в основном является металлической и лишь в небольшой степени состоит из изоляционного материала.
8.2.12 Испытания должны выполняться в соответствии с ГОСТ 27483.
8.2.12.1 Общее описание испытания - по разделу 3 ГОСТ 27483.
Плотность папиросной бумаги составляет 12-25 г/см2.
8.2.12.3 Предварительное выдерживание
Перед началом испытания образец выдерживают в течение 24 ч в атмосфере при температуре от 15 до 35 °С и относительной влажности от 35 до 75 %.
8.2.12.4 Методика испытаний
Устройство помещают в хорошо проветриваемую темную камеру, чтобы пламя, возникшее во время испытания, было видно.
Во время испытания должны быть соблюдены условия, указанные в 9.1-9.3 ГОСТ 27483.
После каждого испытания необходимо зачищать конец раскаленной проволоки от изоляционного материала, например с помощью щетки.
8.2.12.5 Параметры испытания
Температура конца раскаленной проволоки должна соответствовать указанной в таблице 13. Продолжительность приложения проволоки должна составлять (30±1) с.
Таблица 13Составная часть электрооборудования из изоляционного материала
Температура,
°С ±10Части, удерживающие токоведущие детали
960
Части, предназначенные для установки в нишах стен
850
Все другие части, включая части, необходимости в которых для удерживания токоведущих деталей нет, и части, предназначенные для встраивания в трудно воспламеняющиеся стенки
650
Для данного испытания защитный проводник (РЕ) не рассматривают как токоведущую часть.
8.2.12.6 Наблюдения и оценка результатов испытания
В ходе испытания необходимо проводить наблюдения за образцом, окружающими элементами и слоем, расположенным под образцом.
При этом должно быть зафиксировано время от начала воздействия раскаленной проволоки:
- до момента воспламенения образца или слоя под ним;
- до момента затухания пламени в процессе испытания или после его окончания.
Образец считают удовлетворяющим испытанию раскаленной проволокой, если:
- отсутствует открытое пламя и образец не раскален, или
- горение или свечение образца прекращаются в течение 30 с после устранения проволоки.
Бумага не должна воспламеняться и сосновая доска не должна быть подпалена.
[ ГОСТ Р 51321. 3-99 ( МЭК 60439-3-90)]
Тематики
- НКУ (шкафы, пульты,...)
EN
- verification of resistance of insulating materials to abnormal heat and fire due to internal electrical effects
Англо-русский словарь нормативно-технической терминологии > verification of resistance of insulating materials to abnormal heat and fire due to internal electrical effects
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8 effects of the electric arc inside switchgear and controlgear assemblу
- действие электрической дуги, возникающей внутри НКУ распределения и управления
действие электрической дуги, возникающей внутри НКУ распределения и управления
-
[Интент]Параллельные тексты EN-RU
Effects of the electric arc inside switchgear and controlgear assemblies
In the proximity of the main boards, i.e. in the proximity of big electrical machines, such as transformers or generators, the short-circuit power is high and consequently also the energy associated with the electrical arc due to a fault is high.
Without going into complex mathematical descriptions of this phenomenon, the first instants of arc formation inside a cubicle can be schematized in 4 phases:
1. compression phase: in this phase the volume of the air where the arc develops is overheated owing to the continuous release of energy; due to convection and radiation the remaining volume of air inside the cubicle warms up; initially there are temperature and pressure values different from one zone to another;
2. expansion phase: from the first instants of internal pressure increase a hole is formed through which the overheated air begins to go out. In this phase the pressure reaches its maximum value and starts to decrease owing to the release of hot air;
3. emission phase: in this phase, due to the continuous contribution of energy by the arc, nearly all the air is forced out under a soft and almost constant overpressure;
4. thermal phase: after the expulsion of the air, the temperature inside the switchgear reaches almost that of the electrical arc, thus beginning this final phase which lasts till the arc is quenched, when all the metals and the insulating materials coming into contact undergo erosion with production of gases, fumes and molten material particles.
Should the electrical arc occur in open configurations, some of the described phases could not be present or could have less effect; however, there shall be a pressure wave and a rise in the temperature of the zones surrounding the arc.
Being in the proximity of an electrical arc is quite dangerous; here are some data to understand how dangerous it is:
• pressure: at a distance of 60 cm from an electrical arc associated with a 20 kA arcing fault a person can be subject to a force of 225 kg; moreover, the sudden pressure wave may cause permanent injuries to the eardrum;
• arc temperatures: about 7000-8000 °C;
• sound: electrical arc sound levels can reach 160 db, a shotgun blast only 130 db.
[ABB]Действие электрической дуги, возникающей внутри НКУ распределения и управления
Короткое замыкание вблизи больших силовых устройств, таких как трансформаторы или генераторы имеет очень большую мощность. Поэтому энергия электрической дуги, возникшей в результате короткого замыкания, очень большая.
Не вдаваясь в сложное математическое описание данного явления, можно сказать, что первые мгновения формирования дуги внутри шкафа можно упрощенно разделить на четыре этапа:
1. Этап сжатия: на этом этапе объем воздуха, в котором происходит зарождение дуги перегревается вследствие непрерывного высвобождения энергии. За счет конвекции и излучения оставшийся объем воздуха внутри шкафа нагревается. На этом начальном этапе значения температуры и давления воздуха в разных зонах НКУ разные.
2. Этап расширения: с первых мгновений внутреннее давление создает канал, через который начинается движение перегретого воздуха. На этом этапе давление достигает своего максимального значения, после чего начинает уменьшаться вследствие выхода горячего воздуха.
3. Этап эмиссии: на этом этапе вследствие непрерывного пополнения энергией дуги почти весь воздух выталкивается под действием мягкого и почти постоянного избыточного давления.
4. Термический этап: после выхлопа воздуха температура внутри НКУ почти достигает температуры электрической дуги. Так начинается заключительный этап, который длится до тех пор, пока дуга не погаснет. При этом все металлические и изоляционные материалы, вступившие в контакт с дугой, оказываются подвергнутыми эрозии с выделением газов, дыма и частиц расплавленного материала.
Если электрическая дуга возникнет в открытом НКУ, то некоторые из описанных этапов могут не присутствовать или могут иметь меньшее воздействие. Тем не менее будет иметь место воздушная волна и подъем температуры вблизи дуги.
Находиться вблизи электрической дуги довольно опасно. Ниже приведены некоторые сведения, помогающие осознать эту опасность:
• давление: На расстоянии 60 см от электрической дуги, вызванной током короткого замыкания 20 кА, человек может подвергнуться воздействию силы 225 кг. Более того, резкая волна давления может нанести тяжелую травму барабанным перепонкам;
• температура дуги: около 7000-8000 °C;
• шумовое воздействие: Уровень шумового воздействия электрической дуги может достигнуть 160 дБ (выстрел из дробовика – 130 дБ).
[Перевод Интент]Тематики
- НКУ (шкафы, пульты,...)
EN
Англо-русский словарь нормативно-технической терминологии > effects of the electric arc inside switchgear and controlgear assemblу
-
9 электроизоляционный материал
Большой англо-русский и русско-английский словарь > электроизоляционный материал
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10 электроизоляционный материал
Русско-английский политехнический словарь > электроизоляционный материал
-
11 электроизоляционный материал
1) Engineering: dielectric, electric insulating material, insulating material2) Metallurgy: electrical insulator3) Electronics: insulant4) Automation: electrically insulating materialУниверсальный русско-английский словарь > электроизоляционный материал
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12 електроізоляційний
dielectric, electrical-insulation, insulatingелектроізоляційний папір — dielectric paper, electrical insulating [electrical insulationi] paper
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13 изоляционный материал
изоляционный материал
изолятор
-
[IEV number 151-15-35]EN
insulating material
insulant
material used to prevent electric conduction between conductive elements
NOTE – In the field of electromagnetism the term "insulant" is also used as a synonym for "insulating medium".
Source: 212-01-01 MOD, IEC 60050-121
[IEV number 151-15-35]FR
isolant, m
matériau isolant, m
matériau destiné à empêcher la conduction électrique entre des éléments conducteurs
NOTE – En électromagnétisme le terme "isolant" est aussi utilisé comme synonyme de "milieu isolant".
Source: 212-01-01 MOD, CEI 60050-121
[IEV number 151-15-35]Синонимы
EN
DE
FR
- isolant, m
- matériau isolant, m
Русско-английский словарь нормативно-технической терминологии > изоляционный материал
-
14 materia|ł
m (G materiału) 1. (tworzywo) material C/U- materiał budowlany/grzejny a building/heating material- materiał opałowy fuel- materiały ogniotrwałe fire-resistant materials2. zw. pl (wyposażenie) supplies pl, materials pl- materiały biurowe office supplies- materiały piśmienne stationery (supplies)- materiały fotograficzne/rysunkowe photographic/drawing materials a. supplies3. (zbiór wiadomości) material C/U- materiały archiwalne/źródłowe archival/source materials- materiał dowodowy/obciążający Prawo evidence/incriminating evidence- materiał liczbowy/statystyczny numerical/statistical material- materiały reklamowe publicity material(s)- materiały do książki materials for a book4. (tkanina) material C/U, fabric C/U- materiał bawełniany/jedwabny/wełniany cotton/silk/wool(len) material a. fabric- materiał supełkowy bouclé- materiały dwustronne double-sided a. reversible materials a. fabrics- materiał w grochy/paski polka-dot/striped material a. fabric- materiał gładki/kolorowy plain/coloured material a. fabric- materiał na suknię ślubną material a. fabric for a wedding dress- garnitur uszyty z dobrgo materiału a suit made of a good material a. fabric- materiał siewny Roln. seed, sowing material- materiał ścierny Techn. abrasive- materiały ciepłochronne Techn. (thermal) insulation, (thermal) insulating materials- materiały elektroizolacyjne Elektr. electric insulants, electric insulating materials- materiały pędne Chem. propellants- materiały wybuchowe Chem. explosives- plastyczne materiały wybuchowe Chem. plastic explosives- ślepy materiał (zecerski) Druk. spacing material■ być dobrym/złym materiałem na męża/żonę przen. to be/to not be (good) husband/wife materialThe New English-Polish, Polish-English Kościuszko foundation dictionary > materia|ł
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15 длительный допустимый ток
- Strombelastbarkeit, f
- Dauerstrombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-немецкий словарь нормативно-технической терминологии > длительный допустимый ток
-
16 courant admissible, m
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Франко-русский словарь нормативно-технической терминологии > courant admissible, m
-
17 courant permanent admissible, m
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Франко-русский словарь нормативно-технической терминологии > courant permanent admissible, m
-
18 Dauerstrombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Немецко-русский словарь нормативно-технической терминологии > Dauerstrombelastbarkeit, f
-
19 Strombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Немецко-русский словарь нормативно-технической терминологии > Strombelastbarkeit, f
-
20 длительный допустимый ток
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-английский словарь нормативно-технической терминологии > длительный допустимый ток
См. также в других словарях:
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