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П-274М по ТУ 16-505.221-78. Провод полевой связи (полевка)

Описание

НАЗНАЧЕНИЕ

Провод предназначен для полевой связи. Допускается прокладка в грунте, по земле, подвеска на опорах, кратковременная прокладка через водные преграды.

КОНСТРУКЦИЯ

ТОКОПРОВОДЯЩАЯ ЖИЛА – скручена из 3-х стальных оцинкованных проволок диаметром 0,3 мм и 4-х медных проволок диаметром 0,3 мм. В центре расположена стальная проволока, в наружном повиве – медные и стальные проволоки по схеме: 2 медные + 1 стальная + 2 медные + 1 стальная.
ИЗОЛЯЦИЯ – светостабилизированный полиэтилен высокой плотности толщиной 0,5 мм.
СКРУТКА – две изолированные жилы максимальным диаметром 2,3 мм скручиваются в пару с шагом 80-100 м.

ТЕХНИЧЕСКИЕ ХАРАКТЕРИСТИКИ
Электрическое сопротивление токопроводящей жилы не более 65 Ом/ км.
Электрическое сопротивление изоляции после 1 часа пребывания в воде при температуре 20°С не менее 1000 Мом/км.
Рабочая температура – от -50°С до + 65°С.
Разрывное усилие изолированной жилы не менее 392Н.
Масса провода не более 15 кг/км.
Строительная длина – 500м±10 м.
Срок службы проводов не менее 15 лет.

Марка

провода

Число и номинальное сечение жил, мм2

Конструкция токопроводящей жилы

Радиальная толщина изоляционно-защитной оболочки, мм, не менее

Наружный диаметр изолированной жилы, мм, не более

Расчетная масса, кг/км

проволока

стальная

проволока

медная

число

номин.

диаметр, мм

число

номин.

диаметр, мм

П-274 М

2×0,5

3

0,30

4

0,30

0,5

2,3

14,8

П-274 М1

2×0,35

4

0,25

3

0,26

0,5

2,15

11,5

П-274 М2

2×0,35

6

0,25

1

0,26

0,5

2,15

11,1

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