physical circuits

• физическа верига

• метална верига

1) схема; цепь; контур

2) канал; линия; тракт

3) тлф. шлейф

4) цикл ( графа)

5) круговое движение, движение по окружности || совершать круговое движение, двигаться по окружности

•

- π-circuit

SUBJECT AREA: Electronics and information technology

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Noyce was the son of a Congregational minister whose family, after a number of moves, finally settled in Grinnell, some 50 miles (80 km) east of Des Moines, Iowa. Encouraged to follow his interest in science, in his teens he worked as a baby-sitter and mower of lawns to earn money for his hobby. One of his clients was Professor of Physics at Grinnell College, where Noyce enrolled to study mathematics and physics and eventually gained a top-grade BA. It was while there that he learned of the invention of the transistor by the team at Bell Laboratories, which included John Bardeen, a former fellow student of his professor. After taking a PhD in physical electronics at the Massachusetts Institute of Technology in 1953, he joined the Philco Corporation in Philadelphia to work on the development of transistors. Then in January 1956 he accepted an invitation from William Shockley, another of the Bell transistor team, to join the newly formed Shockley Transistor Company, the first electronic firm to set up shop in Palo Alto, California, in what later became known as "Silicon Valley".

From the start things at the company did not go well and eventually Noyce and Gordon Moore and six colleagues decided to offer themselves as a complete development team; with the aid of the Fairchild Camera and Instrument Company, the Fairchild Semiconductor Corporation was born. It was there that in 1958, contemporaneously with Jack K. Wilby at Texas Instruments, Noyce had the idea for monolithic integration of transistor circuits. Eventually, after extended patent litigation involving study of laboratory notebooks and careful examination of the original claims, priority was assigned to Noyce. The invention was most timely. The Apollo Moon-landing programme announced by President Kennedy in May 1961 called for lightweight sophisticated navigation and control computer systems, which could only be met by the rapid development of the new technology, and Fairchild was well placed to deliver the micrologic chips required by NASA.

In 1968 the founders sold Fairchild Semicon-ductors to the parent company. Noyce and Moore promptly found new backers and set up the Intel Corporation, primarily to make high-density memory chips. The first product was a 1,024-bit random access memory (1 K RAM) and by 1973 sales had reached $60 million. However, Noyce and Moore had already realized that it was possible to make a complete microcomputer by putting all the logic needed to go with the memory chip(s) on a single integrated circuit (1C) chip in the form of a general purpose central processing unit (CPU). By 1971 they had produced the Intel 4004 microprocessor, which sold for US$200, and within a year the 8008 followed. The personal computer (PC) revolution had begun! Noyce eventually left Intel, but he remained active in microchip technology and subsequently founded Sematech Inc.

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SUBJECT AREA: Electronics and information technology, Public utilities, Telecommunications

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After education at King's College, London, in 1852 Preece entered the office of Edwin Clark with the intention of becoming a civil engineer, but graduate studies at the Royal Institution under Faraday fired his enthusiasm for things electrical. His earliest work, as connected with telegraphy and in particular its application for securing the safe working of railways; in 1853 he obtained an appointment with the Electric and National Telegraph Company. In 1856 he became Superintendent of that company's southern district, but four years later he moved to telegraph work with the London and South West Railway. From 1858 to 1862 he was also Engineer to the Channel Islands Telegraph Company. When the various telegraph companies in Britain were transferred to the State in 1870, Preece became a Divisional Engineer in the General Post Office (GPO). Promotion followed in 1877, when he was appointed Chief Electrician to the Post Office. One of the first specimens of Bell's telephone was brought to England by Preece and exhibited at the British Association meeting in 1877. From 1892 to 1899 he served as Engineer-in-Chief to the Post Office. During this time he made a number of important contributions to telegraphy, including the use of water as part of telegraph circuits across the Solent (1882) and the Bristol Channel (1888). He also discovered the existence of inductive effects between parallel wires, and with Fleming showed that a current (thermionic) flowed between the hot filament and a cold conductor in an incandescent lamp.

Preece was distinguished by his administrative ability, some scientific insight, considerable engineering intuition and immense energy. He held erroneous views about telephone transmission and, not accepting the work of Oliver Heaviside, made many errors when planning trunk circuits. Prior to the successful use of Hertzian waves for wireless communication Preece carried out experiments, often on a large scale, in attempts at wireless communication by inductive methods. These became of historic interest only when the work of Maxwell and Hertz was developed by Guglielmo Marconi. It is to Preece that credit should be given for encouraging Marconi in 1896 and collaborating with him in his early experimental work on radio telegraphy.

While still employed by the Post Office, Preece contributed to the development of numerous early public electricity schemes, acting as Consultant and often supervising their construction. At Worcester he was responsible for Britain's largest nineteenth-century public hydro-electric station. He received a knighthood on his retirement in 1899, after which he continued his consulting practice in association with his two sons and Major Philip Cardew. Preece contributed some 136 papers and printed lectures to scientific journals, ninety-nine during the period 1877 to 1894.

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GW / KF

SUBJECT AREA: Electronics and information technology, Weapons and armour

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Bode received his bachelor's and master's degrees from Ohio State University in 1924 and 1926, respectively, and his PhD from Columbia University, New York, in 1935. In 1926 he joined the Bell Telephone Laboratories, where he made many theoretical contributions to the understanding of the behaviour of electronic circuits and, in particular, in conjunction with Harry Nyquist, of the conditions under which amplifier circuits become unstable.

During the Second World War he worked on the design of gun control systems and afterwards was a member of a team that worked with Douglas Aircraft to develop the Nike anti-aircraft missile. A member of the Bell Laboratories Mathematical Research Group from 1929, he became its Director in 1952, and then Director of Physical Sciences. Finally he became Vice-President of the Laboratories, with responsibility for systems engineering, and a director of Bellcomm, a Bell company involved in the Moon-landing programme. When he retired from Bell in 1967, he became Professor of Systems Engineering at Harvard University.

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1) Общая лексика: ПЭВМ, (Permanent Council) ПС (Постоянный совет) (ОБСЕ)

2) Компьютерная техника: Painless Computing, Personal Computing, Personally Configured, Poor Communication, Proactive Computing, Processor Control, Programmable Calculator

3) Геология: Pacific Coast, Pocket Computer

4) Медицина: Prompt Care, primary cell, prenylcysteine

5) Американизм: Penn Charter, Presidents Council, Privatization And Cuts

6) Спорт: Paul's Chips, Pitch Class, Player Characteristic, Player Coach, Pre Christ, Punt Center, Республиканский Совет

7) Латинский язык: Patres Conscripti

8) Военный термин: II PROVIDE COMFORT II, Parallel Computing, Pass Certified, Patrol Coastal, Pay Corps, Paymaster-in-Chief, Pharmacy Corps, Police Corps, Postal Clerk, Power Converter, Procurement Command, Provide Comfort, pack code, panoramic camera, paralyzing concentration, parts catalog, past commander, patrol carrier, patrol commander, patrol craft, pay clerk, performance code, personnel carrier, plane captain, plane commander, port call, positive control, post commander, power control, predictor control, primary center, principal chaplain, procurement coordinator, production control, program change, program control, programmed check, project code, project control, project coordination, projector charge, prophylactic center, prototype concept, pseudocode, purchasing and contracting

9) Техника: Personal Call, current price, paper chromatography, parity check, parity control, partly cash, pay card, perfectly conducting, peripheral controller, personal correction, phase center, photo-cathode, photoconductor, plant computer, plasma chromatography, polar crane, polymer concrete, power center, pressure chamber, prime contractor, private circuit, process computer, process control, process controller, production certificate, professional communication, program console, program coordinator, program costs, project charter, proportional counter, propulsive coefficient, protective clothing, protective coating, pulse counter, показатель концентрации солей

10) Сельское хозяйство: post challenge, prime cost

11) Шутливое выражение: Perfect Computer, Personal Confuser, Plastic Computer

12) Химия: Propylene Carbonate, potential controller

13) Математика: Perfectly Complex, Polar Cycloaddition, исчисление высказываний (propositional calculus), исчисление предикатов (predicate calculus), парное сравнение (paired comparison)

14) Религия: Perfectly Created, Persecuted Christian

15) Метеорология: Program Council

16) Железнодорожный термин: Consolidated Rail Corporation

17) Юридический термин: Partial Conversion, Personal Cause, Personal Copier, Personally Corrupt, Physical Containment, Plain Courtesy, Probable Cause

18) Бухгалтерия: Per Capita, Premier Casting

19) Астрономия: Planetary Contrast

20) Ветеринария: Pet Chihuahua, Pony Club

21) Грубое выражение: Piece Of Crap, Poncey Crap, Pretentious Crap, Pretty Crappy, Pushy Chick

22) Металлургия: первичное охлаждение (primary cooling) (прямого коксового газа)

23) Музыка: Polyphonic Collection

24) Оптика: photoconductive

25) Политика: Pitcairn Islands, Progressive Conservative, политкорректно, политкорректный

26) Радио: Poor Connection, PALAPA-C, диапазон С-Палапа (спутниковый)

27) Телекоммуникации: Path Control, Personal Communications, Program Counter, персональный компьютер

28) Сокращение: (type abbreviation) Patrol craft, Patrol Craft (River; R), Patrol Craft, Fast (USA; F), Peace Corps, PerCent; PerCentage, Personal Computer (IBM wants you to believe a specific kind), Physical Conditioning, Platoon Commander, Player Character, Post Card, Postal & Courier, Printed Circuit (electronics circuit board), Privileged Character, Privy Council, Providence College, Pulse Compression, paid cash, pitch circle, planned cost, plug cock, point of curve, police constable, private contract, production cost, тайный совет (Великобритания) (a privy council), Progressive Conservative party (Canada), Post Cibum (after meals), prime costs, privy councillor

29) Текстиль: Pearl Cotton

30) Университет: Partial Credit, Pomona College

31) Физиология: After Meals, Perforated Cranium, Peripheral Clarity, Phone call, Posterior Cervical, Present Complaint

32) Электроника: Powder Coating, Pre-emphasis Circuits

33) Вычислительная техника: DOS personal computer disk operating system, Priority Control, Protocol Control, parameter checkout, photocell, primary cache, processing complexity, programmable controller, pulse code, pulse controller, punched card, Printed Circuit (IC), Player Character (see, Role-playing), персональный компьютер семейства IBM PC, указатель команд

34) Нефть: photoclinometer, производственный сертификат (production certificate), Peзиcтивимeтpия

35) Иммунология: Primitive Cell

36) Биохимия: phosphatidylcholine

37) Онкология: Prostate Cancer

38) Картография: pilotage chart, point of curvature

39) Банковское дело: мелкие деньги (petty cash), небольшая наличная сумма (petty cash), разменная монета (petty cash), сертификат участия (PC participation certificate)

40) Биотехнология: Pockels cell

41) Геофизика: персональная электронно-вычислительная машина

42) Транспорт: Passenger Car, Politically Correct, Precious Cargo

43) Пищевая промышленность: Pass The Corona, Plant Corn, Pork Chops

44) Силикатное производство: photochromic, portland cement

45) Фирменный знак: PCA Electronics, Prism Card

46) Энергетика: (powderized coal) порошкообразный уголь

47) СМИ: Pervasive Computing, Political Correctness, Program Camera

48) Деловая лексика: Paper Copy, Paying Customer, Person Contacted, Personally Crafted, Planning And Control, Power Compact, Precedents Committee, Product Closure, Production Capability, Production Cup, Professional Corporation, Profit Choice, Profitability Constraint, Purchase Constantly, персональная вычислительная машина (personal computer), частичная загрузка, производственный контракт

49) Бурение: портер-крик (Porter Creek; свита группы мидуэй палеоцена третичной системы), пэйнт-крик (Paint Creek; свита отдела честер миссисипской системы), укороченная бурильная труба (pony collar)

50) Глоссарий компании Сахалин Энерджи: Pressure control, processing center

51) Образование: Perfect For Child, Phrase Command, Physically Challenged, Polite And Courteous

52) Инвестиции: participation certificate, petty cash

53) Сетевые технологии: Personal Cluster, personal computer, ПК, персональный компьютер семейства

54) Полимеры: polycarbonate, polychloroprene, post-chlorinated, potential corrosivity, pressure controller

55) Автоматика: plug control, персональная ЭВМ, программируемый командоаппарат, программируемый контроллер

56) Контроль качества: parameter check-out

57) Химическое оружие: ( KHIMBIOKOM) -\> President's Committee for Conventional Problems of Chemical and Biological Weapons, Project coordinator

58) Авиационная медицина: ( near) point of convergence

59) Макаров: phase comparator, programmable control, programming center, поликарбонат, (plug control) цикловое ПУ

60) Расширение файла: Parametric Cubic, Printed Circuit, Processor Controller, Program Computer, Punch Card, Text file containing IBM PC specific info

61) Нефть и газ: process condensate, performance contract, (Production Crude) Добытая нефть

62) Логистика: physical cases (кейсы, ящики, контейнеры)

63) Военно-политический термин: Political Committee

64) Электротехника: peaking capacity, phase control, power contactor, pulsating current, pulverized coal

65) Имена и фамилии: Prince Charming

66) Ebay. Piece (e.g., "2pc" means the auction comes with two total units)

67) Печатные платы: production capable

68) ООН: Peaceful Coexistance

69) Цемент: plain cement, бездобавочный цемент, клинкерный цемент, цемент без добавок, чистый клинкерный цемент, straight cement

70) Общественная организация: Population Connection, Population Council, Presidential Classroom, Programme Committee, Public Citizen

71) Должность: Paper Carrier, Perfect Corner, Perfectly Comfortable, Personal Consultant, Poetic Chap, Privy Counsellor

72) Чат: Past Caring, Post A Comment, Pretty Chancy, Pretty Cheap, Pretty Clever, Pretty Cool, Pretty Cute

73) Правительство: Pacific Crest, Panama City, Florida, Pepper Canyon, Pine Creek

74) NYSE. P C Holdings, S. A.

75) Аэропорты: система количества мест (Piece Conсept:; as opposed to Weight Conсept)

76) Программное обеспечение: Proof Checker

77) Хобби: Platina Cards

1) Общая лексика: ПЭВМ, (Permanent Council) ПС (Постоянный совет) (ОБСЕ)

2) Компьютерная техника: Painless Computing, Personal Computing, Personally Configured, Poor Communication, Proactive Computing, Processor Control, Programmable Calculator

3) Геология: Pacific Coast, Pocket Computer

4) Медицина: Prompt Care, primary cell, prenylcysteine

5) Американизм: Penn Charter, Presidents Council, Privatization And Cuts

6) Спорт: Paul's Chips, Pitch Class, Player Characteristic, Player Coach, Pre Christ, Punt Center, Республиканский Совет

7) Латинский язык: Patres Conscripti

8) Военный термин: II PROVIDE COMFORT II, Parallel Computing, Pass Certified, Patrol Coastal, Pay Corps, Paymaster-in-Chief, Pharmacy Corps, Police Corps, Postal Clerk, Power Converter, Procurement Command, Provide Comfort, pack code, panoramic camera, paralyzing concentration, parts catalog, past commander, patrol carrier, patrol commander, patrol craft, pay clerk, performance code, personnel carrier, plane captain, plane commander, port call, positive control, post commander, power control, predictor control, primary center, principal chaplain, procurement coordinator, production control, program change, program control, programmed check, project code, project control, project coordination, projector charge, prophylactic center, prototype concept, pseudocode, purchasing and contracting

9) Техника: Personal Call, current price, paper chromatography, parity check, parity control, partly cash, pay card, perfectly conducting, peripheral controller, personal correction, phase center, photo-cathode, photoconductor, plant computer, plasma chromatography, polar crane, polymer concrete, power center, pressure chamber, prime contractor, private circuit, process computer, process control, process controller, production certificate, professional communication, program console, program coordinator, program costs, project charter, proportional counter, propulsive coefficient, protective clothing, protective coating, pulse counter, показатель концентрации солей

10) Сельское хозяйство: post challenge, prime cost

11) Шутливое выражение: Perfect Computer, Personal Confuser, Plastic Computer

12) Химия: Propylene Carbonate, potential controller

13) Математика: Perfectly Complex, Polar Cycloaddition, исчисление высказываний (propositional calculus), исчисление предикатов (predicate calculus), парное сравнение (paired comparison)

14) Религия: Perfectly Created, Persecuted Christian

15) Метеорология: Program Council

16) Железнодорожный термин: Consolidated Rail Corporation

17) Юридический термин: Partial Conversion, Personal Cause, Personal Copier, Personally Corrupt, Physical Containment, Plain Courtesy, Probable Cause

18) Бухгалтерия: Per Capita, Premier Casting

19) Астрономия: Planetary Contrast

20) Ветеринария: Pet Chihuahua, Pony Club

21) Грубое выражение: Piece Of Crap, Poncey Crap, Pretentious Crap, Pretty Crappy, Pushy Chick

22) Металлургия: первичное охлаждение (primary cooling) (прямого коксового газа)

23) Музыка: Polyphonic Collection

24) Оптика: photoconductive

25) Политика: Pitcairn Islands, Progressive Conservative, политкорректно, политкорректный

26) Радио: Poor Connection, PALAPA-C, диапазон С-Палапа (спутниковый)

27) Телекоммуникации: Path Control, Personal Communications, Program Counter, персональный компьютер

28) Сокращение: (type abbreviation) Patrol craft, Patrol Craft (River; R), Patrol Craft, Fast (USA; F), Peace Corps, PerCent; PerCentage, Personal Computer (IBM wants you to believe a specific kind), Physical Conditioning, Platoon Commander, Player Character, Post Card, Postal & Courier, Printed Circuit (electronics circuit board), Privileged Character, Privy Council, Providence College, Pulse Compression, paid cash, pitch circle, planned cost, plug cock, point of curve, police constable, private contract, production cost, тайный совет (Великобритания) (a privy council), Progressive Conservative party (Canada), Post Cibum (after meals), prime costs, privy councillor

29) Текстиль: Pearl Cotton

30) Университет: Partial Credit, Pomona College

31) Физиология: After Meals, Perforated Cranium, Peripheral Clarity, Phone call, Posterior Cervical, Present Complaint

32) Электроника: Powder Coating, Pre-emphasis Circuits

33) Вычислительная техника: DOS personal computer disk operating system, Priority Control, Protocol Control, parameter checkout, photocell, primary cache, processing complexity, programmable controller, pulse code, pulse controller, punched card, Printed Circuit (IC), Player Character (see, Role-playing), персональный компьютер семейства IBM PC, указатель команд

34) Нефть: photoclinometer, производственный сертификат (production certificate), Peзиcтивимeтpия

35) Иммунология: Primitive Cell

36) Биохимия: phosphatidylcholine

37) Онкология: Prostate Cancer

38) Картография: pilotage chart, point of curvature

39) Банковское дело: мелкие деньги (petty cash), небольшая наличная сумма (petty cash), разменная монета (petty cash), сертификат участия (PC participation certificate)

40) Биотехнология: Pockels cell

41) Геофизика: персональная электронно-вычислительная машина

42) Транспорт: Passenger Car, Politically Correct, Precious Cargo

43) Пищевая промышленность: Pass The Corona, Plant Corn, Pork Chops

44) Силикатное производство: photochromic, portland cement

45) Фирменный знак: PCA Electronics, Prism Card

46) Энергетика: (powderized coal) порошкообразный уголь

47) СМИ: Pervasive Computing, Political Correctness, Program Camera

48) Деловая лексика: Paper Copy, Paying Customer, Person Contacted, Personally Crafted, Planning And Control, Power Compact, Precedents Committee, Product Closure, Production Capability, Production Cup, Professional Corporation, Profit Choice, Profitability Constraint, Purchase Constantly, персональная вычислительная машина (personal computer), частичная загрузка, производственный контракт

49) Бурение: портер-крик (Porter Creek; свита группы мидуэй палеоцена третичной системы), пэйнт-крик (Paint Creek; свита отдела честер миссисипской системы), укороченная бурильная труба (pony collar)

50) Глоссарий компании Сахалин Энерджи: Pressure control, processing center

51) Образование: Perfect For Child, Phrase Command, Physically Challenged, Polite And Courteous

52) Инвестиции: participation certificate, petty cash

53) Сетевые технологии: Personal Cluster, personal computer, ПК, персональный компьютер семейства

54) Полимеры: polycarbonate, polychloroprene, post-chlorinated, potential corrosivity, pressure controller

55) Автоматика: plug control, персональная ЭВМ, программируемый командоаппарат, программируемый контроллер

56) Контроль качества: parameter check-out

57) Химическое оружие: ( KHIMBIOKOM) -\> President's Committee for Conventional Problems of Chemical and Biological Weapons, Project coordinator

58) Авиационная медицина: ( near) point of convergence

59) Макаров: phase comparator, programmable control, programming center, поликарбонат, (plug control) цикловое ПУ

60) Расширение файла: Parametric Cubic, Printed Circuit, Processor Controller, Program Computer, Punch Card, Text file containing IBM PC specific info

61) Нефть и газ: process condensate, performance contract, (Production Crude) Добытая нефть

62) Логистика: physical cases (кейсы, ящики, контейнеры)

63) Военно-политический термин: Political Committee

64) Электротехника: peaking capacity, phase control, power contactor, pulsating current, pulverized coal

65) Имена и фамилии: Prince Charming

66) Ebay. Piece (e.g., "2pc" means the auction comes with two total units)

67) Печатные платы: production capable

68) ООН: Peaceful Coexistance

69) Цемент: plain cement, бездобавочный цемент, клинкерный цемент, цемент без добавок, чистый клинкерный цемент, straight cement

70) Общественная организация: Population Connection, Population Council, Presidential Classroom, Programme Committee, Public Citizen

71) Должность: Paper Carrier, Perfect Corner, Perfectly Comfortable, Personal Consultant, Poetic Chap, Privy Counsellor

72) Чат: Past Caring, Post A Comment, Pretty Chancy, Pretty Cheap, Pretty Clever, Pretty Cool, Pretty Cute

73) Правительство: Pacific Crest, Panama City, Florida, Pepper Canyon, Pine Creek

74) NYSE. P C Holdings, S. A.

75) Аэропорты: система количества мест (Piece Conсept:; as opposed to Weight Conсept)

76) Программное обеспечение: Proof Checker

77) Хобби: Platina Cards

1) Общая лексика: ПЭВМ, (Permanent Council) ПС (Постоянный совет) (ОБСЕ)

2) Компьютерная техника: Painless Computing, Personal Computing, Personally Configured, Poor Communication, Proactive Computing, Processor Control, Programmable Calculator

3) Геология: Pacific Coast, Pocket Computer

4) Медицина: Prompt Care, primary cell, prenylcysteine

5) Американизм: Penn Charter, Presidents Council, Privatization And Cuts

6) Спорт: Paul's Chips, Pitch Class, Player Characteristic, Player Coach, Pre Christ, Punt Center, Республиканский Совет

7) Латинский язык: Patres Conscripti

8) Военный термин: II PROVIDE COMFORT II, Parallel Computing, Pass Certified, Patrol Coastal, Pay Corps, Paymaster-in-Chief, Pharmacy Corps, Police Corps, Postal Clerk, Power Converter, Procurement Command, Provide Comfort, pack code, panoramic camera, paralyzing concentration, parts catalog, past commander, patrol carrier, patrol commander, patrol craft, pay clerk, performance code, personnel carrier, plane captain, plane commander, port call, positive control, post commander, power control, predictor control, primary center, principal chaplain, procurement coordinator, production control, program change, program control, programmed check, project code, project control, project coordination, projector charge, prophylactic center, prototype concept, pseudocode, purchasing and contracting

9) Техника: Personal Call, current price, paper chromatography, parity check, parity control, partly cash, pay card, perfectly conducting, peripheral controller, personal correction, phase center, photo-cathode, photoconductor, plant computer, plasma chromatography, polar crane, polymer concrete, power center, pressure chamber, prime contractor, private circuit, process computer, process control, process controller, production certificate, professional communication, program console, program coordinator, program costs, project charter, proportional counter, propulsive coefficient, protective clothing, protective coating, pulse counter, показатель концентрации солей

10) Сельское хозяйство: post challenge, prime cost

11) Шутливое выражение: Perfect Computer, Personal Confuser, Plastic Computer

12) Химия: Propylene Carbonate, potential controller

13) Математика: Perfectly Complex, Polar Cycloaddition, исчисление высказываний (propositional calculus), исчисление предикатов (predicate calculus), парное сравнение (paired comparison)

14) Религия: Perfectly Created, Persecuted Christian

15) Метеорология: Program Council

16) Железнодорожный термин: Consolidated Rail Corporation

17) Юридический термин: Partial Conversion, Personal Cause, Personal Copier, Personally Corrupt, Physical Containment, Plain Courtesy, Probable Cause

18) Бухгалтерия: Per Capita, Premier Casting

19) Астрономия: Planetary Contrast

20) Ветеринария: Pet Chihuahua, Pony Club

21) Грубое выражение: Piece Of Crap, Poncey Crap, Pretentious Crap, Pretty Crappy, Pushy Chick

22) Металлургия: первичное охлаждение (primary cooling) (прямого коксового газа)

23) Музыка: Polyphonic Collection

24) Оптика: photoconductive

25) Политика: Pitcairn Islands, Progressive Conservative, политкорректно, политкорректный

26) Радио: Poor Connection, PALAPA-C, диапазон С-Палапа (спутниковый)

27) Телекоммуникации: Path Control, Personal Communications, Program Counter, персональный компьютер

28) Сокращение: (type abbreviation) Patrol craft, Patrol Craft (River; R), Patrol Craft, Fast (USA; F), Peace Corps, PerCent; PerCentage, Personal Computer (IBM wants you to believe a specific kind), Physical Conditioning, Platoon Commander, Player Character, Post Card, Postal & Courier, Printed Circuit (electronics circuit board), Privileged Character, Privy Council, Providence College, Pulse Compression, paid cash, pitch circle, planned cost, plug cock, point of curve, police constable, private contract, production cost, тайный совет (Великобритания) (a privy council), Progressive Conservative party (Canada), Post Cibum (after meals), prime costs, privy councillor

29) Текстиль: Pearl Cotton

30) Университет: Partial Credit, Pomona College

31) Физиология: After Meals, Perforated Cranium, Peripheral Clarity, Phone call, Posterior Cervical, Present Complaint

32) Электроника: Powder Coating, Pre-emphasis Circuits

33) Вычислительная техника: DOS personal computer disk operating system, Priority Control, Protocol Control, parameter checkout, photocell, primary cache, processing complexity, programmable controller, pulse code, pulse controller, punched card, Printed Circuit (IC), Player Character (see, Role-playing), персональный компьютер семейства IBM PC, указатель команд

34) Нефть: photoclinometer, производственный сертификат (production certificate), Peзиcтивимeтpия

35) Иммунология: Primitive Cell

36) Биохимия: phosphatidylcholine

37) Онкология: Prostate Cancer

38) Картография: pilotage chart, point of curvature

39) Банковское дело: мелкие деньги (petty cash), небольшая наличная сумма (petty cash), разменная монета (petty cash), сертификат участия (PC participation certificate)

40) Биотехнология: Pockels cell

41) Геофизика: персональная электронно-вычислительная машина

42) Транспорт: Passenger Car, Politically Correct, Precious Cargo

43) Пищевая промышленность: Pass The Corona, Plant Corn, Pork Chops

44) Силикатное производство: photochromic, portland cement

45) Фирменный знак: PCA Electronics, Prism Card

46) Энергетика: (powderized coal) порошкообразный уголь

47) СМИ: Pervasive Computing, Political Correctness, Program Camera

48) Деловая лексика: Paper Copy, Paying Customer, Person Contacted, Personally Crafted, Planning And Control, Power Compact, Precedents Committee, Product Closure, Production Capability, Production Cup, Professional Corporation, Profit Choice, Profitability Constraint, Purchase Constantly, персональная вычислительная машина (personal computer), частичная загрузка, производственный контракт

49) Бурение: портер-крик (Porter Creek; свита группы мидуэй палеоцена третичной системы), пэйнт-крик (Paint Creek; свита отдела честер миссисипской системы), укороченная бурильная труба (pony collar)

50) Глоссарий компании Сахалин Энерджи: Pressure control, processing center

51) Образование: Perfect For Child, Phrase Command, Physically Challenged, Polite And Courteous

52) Инвестиции: participation certificate, petty cash

53) Сетевые технологии: Personal Cluster, personal computer, ПК, персональный компьютер семейства

54) Полимеры: polycarbonate, polychloroprene, post-chlorinated, potential corrosivity, pressure controller

55) Автоматика: plug control, персональная ЭВМ, программируемый командоаппарат, программируемый контроллер

56) Контроль качества: parameter check-out

57) Химическое оружие: ( KHIMBIOKOM) -\> President's Committee for Conventional Problems of Chemical and Biological Weapons, Project coordinator

58) Авиационная медицина: ( near) point of convergence

59) Макаров: phase comparator, programmable control, programming center, поликарбонат, (plug control) цикловое ПУ

60) Расширение файла: Parametric Cubic, Printed Circuit, Processor Controller, Program Computer, Punch Card, Text file containing IBM PC specific info

61) Нефть и газ: process condensate, performance contract, (Production Crude) Добытая нефть

62) Логистика: physical cases (кейсы, ящики, контейнеры)

63) Военно-политический термин: Political Committee

64) Электротехника: peaking capacity, phase control, power contactor, pulsating current, pulverized coal

65) Имена и фамилии: Prince Charming

66) Ebay. Piece (e.g., "2pc" means the auction comes with two total units)

67) Печатные платы: production capable

68) ООН: Peaceful Coexistance

69) Цемент: plain cement, бездобавочный цемент, клинкерный цемент, цемент без добавок, чистый клинкерный цемент, straight cement

70) Общественная организация: Population Connection, Population Council, Presidential Classroom, Programme Committee, Public Citizen

71) Должность: Paper Carrier, Perfect Corner, Perfectly Comfortable, Personal Consultant, Poetic Chap, Privy Counsellor

72) Чат: Past Caring, Post A Comment, Pretty Chancy, Pretty Cheap, Pretty Clever, Pretty Cool, Pretty Cute

73) Правительство: Pacific Crest, Panama City, Florida, Pepper Canyon, Pine Creek

74) NYSE. P C Holdings, S. A.

75) Аэропорты: система количества мест (Piece Conсept:; as opposed to Weight Conсept)

76) Программное обеспечение: Proof Checker

77) Хобби: Platina Cards

1) Общая лексика: ПЭВМ, (Permanent Council) ПС (Постоянный совет) (ОБСЕ)

2) Компьютерная техника: Painless Computing, Personal Computing, Personally Configured, Poor Communication, Proactive Computing, Processor Control, Programmable Calculator

3) Геология: Pacific Coast, Pocket Computer

4) Медицина: Prompt Care, primary cell, prenylcysteine

5) Американизм: Penn Charter, Presidents Council, Privatization And Cuts

6) Спорт: Paul's Chips, Pitch Class, Player Characteristic, Player Coach, Pre Christ, Punt Center, Республиканский Совет

7) Латинский язык: Patres Conscripti

8) Военный термин: II PROVIDE COMFORT II, Parallel Computing, Pass Certified, Patrol Coastal, Pay Corps, Paymaster-in-Chief, Pharmacy Corps, Police Corps, Postal Clerk, Power Converter, Procurement Command, Provide Comfort, pack code, panoramic camera, paralyzing concentration, parts catalog, past commander, patrol carrier, patrol commander, patrol craft, pay clerk, performance code, personnel carrier, plane captain, plane commander, port call, positive control, post commander, power control, predictor control, primary center, principal chaplain, procurement coordinator, production control, program change, program control, programmed check, project code, project control, project coordination, projector charge, prophylactic center, prototype concept, pseudocode, purchasing and contracting

9) Техника: Personal Call, current price, paper chromatography, parity check, parity control, partly cash, pay card, perfectly conducting, peripheral controller, personal correction, phase center, photo-cathode, photoconductor, plant computer, plasma chromatography, polar crane, polymer concrete, power center, pressure chamber, prime contractor, private circuit, process computer, process control, process controller, production certificate, professional communication, program console, program coordinator, program costs, project charter, proportional counter, propulsive coefficient, protective clothing, protective coating, pulse counter, показатель концентрации солей

10) Сельское хозяйство: post challenge, prime cost

11) Шутливое выражение: Perfect Computer, Personal Confuser, Plastic Computer

12) Химия: Propylene Carbonate, potential controller

13) Математика: Perfectly Complex, Polar Cycloaddition, исчисление высказываний (propositional calculus), исчисление предикатов (predicate calculus), парное сравнение (paired comparison)

14) Религия: Perfectly Created, Persecuted Christian

15) Метеорология: Program Council

16) Железнодорожный термин: Consolidated Rail Corporation

17) Юридический термин: Partial Conversion, Personal Cause, Personal Copier, Personally Corrupt, Physical Containment, Plain Courtesy, Probable Cause

18) Бухгалтерия: Per Capita, Premier Casting

19) Астрономия: Planetary Contrast

20) Ветеринария: Pet Chihuahua, Pony Club

21) Грубое выражение: Piece Of Crap, Poncey Crap, Pretentious Crap, Pretty Crappy, Pushy Chick

22) Металлургия: первичное охлаждение (primary cooling) (прямого коксового газа)

23) Музыка: Polyphonic Collection

24) Оптика: photoconductive

25) Политика: Pitcairn Islands, Progressive Conservative, политкорректно, политкорректный

26) Радио: Poor Connection, PALAPA-C, диапазон С-Палапа (спутниковый)

27) Телекоммуникации: Path Control, Personal Communications, Program Counter, персональный компьютер

28) Сокращение: (type abbreviation) Patrol craft, Patrol Craft (River; R), Patrol Craft, Fast (USA; F), Peace Corps, PerCent; PerCentage, Personal Computer (IBM wants you to believe a specific kind), Physical Conditioning, Platoon Commander, Player Character, Post Card, Postal & Courier, Printed Circuit (electronics circuit board), Privileged Character, Privy Council, Providence College, Pulse Compression, paid cash, pitch circle, planned cost, plug cock, point of curve, police constable, private contract, production cost, тайный совет (Великобритания) (a privy council), Progressive Conservative party (Canada), Post Cibum (after meals), prime costs, privy councillor

29) Текстиль: Pearl Cotton

30) Университет: Partial Credit, Pomona College

31) Физиология: After Meals, Perforated Cranium, Peripheral Clarity, Phone call, Posterior Cervical, Present Complaint

32) Электроника: Powder Coating, Pre-emphasis Circuits

33) Вычислительная техника: DOS personal computer disk operating system, Priority Control, Protocol Control, parameter checkout, photocell, primary cache, processing complexity, programmable controller, pulse code, pulse controller, punched card, Printed Circuit (IC), Player Character (see, Role-playing), персональный компьютер семейства IBM PC, указатель команд

34) Нефть: photoclinometer, производственный сертификат (production certificate), Peзиcтивимeтpия

35) Иммунология: Primitive Cell

36) Биохимия: phosphatidylcholine

37) Онкология: Prostate Cancer

38) Картография: pilotage chart, point of curvature

39) Банковское дело: мелкие деньги (petty cash), небольшая наличная сумма (petty cash), разменная монета (petty cash), сертификат участия (PC participation certificate)

40) Биотехнология: Pockels cell

41) Геофизика: персональная электронно-вычислительная машина

42) Транспорт: Passenger Car, Politically Correct, Precious Cargo

43) Пищевая промышленность: Pass The Corona, Plant Corn, Pork Chops

44) Силикатное производство: photochromic, portland cement

45) Фирменный знак: PCA Electronics, Prism Card

46) Энергетика: (powderized coal) порошкообразный уголь

47) СМИ: Pervasive Computing, Political Correctness, Program Camera

48) Деловая лексика: Paper Copy, Paying Customer, Person Contacted, Personally Crafted, Planning And Control, Power Compact, Precedents Committee, Product Closure, Production Capability, Production Cup, Professional Corporation, Profit Choice, Profitability Constraint, Purchase Constantly, персональная вычислительная машина (personal computer), частичная загрузка, производственный контракт

49) Бурение: портер-крик (Porter Creek; свита группы мидуэй палеоцена третичной системы), пэйнт-крик (Paint Creek; свита отдела честер миссисипской системы), укороченная бурильная труба (pony collar)

50) Глоссарий компании Сахалин Энерджи: Pressure control, processing center

51) Образование: Perfect For Child, Phrase Command, Physically Challenged, Polite And Courteous

52) Инвестиции: participation certificate, petty cash

53) Сетевые технологии: Personal Cluster, personal computer, ПК, персональный компьютер семейства

54) Полимеры: polycarbonate, polychloroprene, post-chlorinated, potential corrosivity, pressure controller

55) Автоматика: plug control, персональная ЭВМ, программируемый командоаппарат, программируемый контроллер

56) Контроль качества: parameter check-out

57) Химическое оружие: ( KHIMBIOKOM) -\> President's Committee for Conventional Problems of Chemical and Biological Weapons, Project coordinator

58) Авиационная медицина: ( near) point of convergence

59) Макаров: phase comparator, programmable control, programming center, поликарбонат, (plug control) цикловое ПУ

60) Расширение файла: Parametric Cubic, Printed Circuit, Processor Controller, Program Computer, Punch Card, Text file containing IBM PC specific info

61) Нефть и газ: process condensate, performance contract, (Production Crude) Добытая нефть

62) Логистика: physical cases (кейсы, ящики, контейнеры)

63) Военно-политический термин: Political Committee

64) Электротехника: peaking capacity, phase control, power contactor, pulsating current, pulverized coal

65) Имена и фамилии: Prince Charming

66) Ebay. Piece (e.g., "2pc" means the auction comes with two total units)

67) Печатные платы: production capable

68) ООН: Peaceful Coexistance

69) Цемент: plain cement, бездобавочный цемент, клинкерный цемент, цемент без добавок, чистый клинкерный цемент, straight cement

70) Общественная организация: Population Connection, Population Council, Presidential Classroom, Programme Committee, Public Citizen

71) Должность: Paper Carrier, Perfect Corner, Perfectly Comfortable, Personal Consultant, Poetic Chap, Privy Counsellor

72) Чат: Past Caring, Post A Comment, Pretty Chancy, Pretty Cheap, Pretty Clever, Pretty Cool, Pretty Cute

73) Правительство: Pacific Crest, Panama City, Florida, Pepper Canyon, Pine Creek

74) NYSE. P C Holdings, S. A.

75) Аэропорты: система количества мест (Piece Conсept:; as opposed to Weight Conсept)

76) Программное обеспечение: Proof Checker

77) Хобби: Platina Cards

SUBJECT AREA: Electronics and information technology, Recording

[br]

[br]

[br]

Nyquist (original family name Nykvist) emigrated from Sweden to the USA when he was 18 years old and settled in Minnesota. After teaching for a time, he studied electrical engineering at the University of North Dakota, gaining his first and Master's degrees in 1915 and 1916, and his PhD from Yale in 1917. He then joined the American Telegraph \& Telephone Company, moving to its Bell Laboratories in 1934 and remaining there until his retirement in 1954. A prolific inventor, he made many contributions to communication engineering, including the invention of vestigial-side band transmission. In the late 1920s he analysed the behaviour of analogue and digital signals in communication circuits, and in 1928 he showed that the thermal noise per unit bandwidth is given by 4 kT, where k is Boltzmann's constant and T the absolute temperature. However, he is best known for the Nyquist Criterion, which defines the conditions necessary for the stable, oscillation-free operation of amplifiers with a closed feedback loop. The problem of how to realize these conditions was investigated by his colleague Hendrik Bode.

[br]

See also: Shannon, Claude Elwood

<tech.gen> (physical separation) ■ Isolierung f

<tech.gen> (of one element from the rest) ■ Absonderung f

< chem> ■ Reindarstellung f

<chem.proc> (presentation of an individual substance) ■ Darstellung f

<el> (of circuits) ■ Entkopplung f ; galvanische Trennung f

<el> (by cutting off connections) ■ Unterbrechung f

1) схема; цепь; контур

2) линия

3) канал

4) сеть

•

- active pause circuit

 

длительная пропускная способность по току
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]

Тематики

• электротехника, основные понятия

EN

• continuous current-carrying capacity

 

(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 I_Z
[ 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

• длительно допустимый ток
• допустимый ток

EN

• ampacity (US)
• continuous current
• continuous current-carrying capacity
• current-carrying capacity

DE

• Dauerstrombelastbarkeit, f
• Strombelastbarkeit, f

FR

• courant admissible, m
• 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 I_Z
[ 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

• длительно допустимый ток
• допустимый ток

EN

• ampacity (US)
• continuous current
• continuous current-carrying capacity
• current-carrying capacity

DE

• Dauerstrombelastbarkeit, f
• Strombelastbarkeit, f

FR

• courant admissible, m
• 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 I_Z
[ 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

• длительно допустимый ток
• допустимый ток

EN

• ampacity (US)
• continuous current
• continuous current-carrying capacity
• current-carrying capacity

DE

• Dauerstrombelastbarkeit, f
• Strombelastbarkeit, f

FR

• courant admissible, m
• courant permanent admissible, m

 

непрерывный ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999]

Тематики

• электротехника, основные понятия

EN

• continuous current

 

(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 I_Z
[ 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

• длительно допустимый ток
• допустимый ток

EN

• ampacity (US)
• continuous current
• continuous current-carrying capacity
• current-carrying capacity

DE

• Dauerstrombelastbarkeit, f
• Strombelastbarkeit, f

FR

• courant admissible, m
• courant permanent admissible, m

 

предельно допустимый ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]

Тематики

• электротехника, основные понятия

EN

• current capacity
• current-carrying capacity

 

прочность печатной платы к токовой нагрузке
Свойство печатной платы сохранять электрические и механические характеристики после воздействия максимально допустимой токовой нагрузки на печатный проводник или металлизированное отверстие печатной платы.
[ ГОСТ Р 53386-2009]

Тематики

• платы печатные

EN

• current-carrying capacity