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UMMARYP
OWER CABLES DESIGNS.............................................................................127 C ONSTRUCTIONAL ELEMENTS OF POWER CABLES .........................129 C ONDUCTORS CHARACTERISTICS ...........................................................131 I NSULATION AND SHEATHING MATERIAL CHARACTERISTICS ...133 D RUMS CHARACTERISTICS ..........................................................................134 E LECTRICAL CABLES CHARACTERISTICS ...................................................135 G UIDE FOR SELECTION OF LOW VOLTGE CABLE ...............................137 T
UNISIE CÂBLES1
27 P
OWER CABLES DESIGNS
Transmission cables practices are
f airly similar in many countries. For w iring type cables, many individual c ountries have preferences for p articular designs or materials, but t he difference is not fundamental. T he present catalog covers e ssentially low and medium v oltage cables up to 33 KV, m anufactured according to E uropean and international s pecifications which are largely u sed in Europe and the majority of c ountries throughout the world .
Power cables are distinguished in
t he following categories
Overhead (Aerial) lines with bare
c onductors.
Overhead (Aerial) lines with
i nsulated conductors.
Low voltage (LV) power cables
f or indoor installations.
Low voltage (LV) power cables
f or outdoor installations.
Low voltage (LV) special cables
d estined to special uses.
Medium Voltage (MV) power
c ables.
Overhead lines are generally
d ivided from the point of view of t heir use, into 3 main categories , as f ollows : - Overhead lines for low voltage p ower distribution in rural areas, as w ell as in small villages - Overhead lines used for m edium voltage power t ransportation and distribution - Overhead lines used for High V oltage power transportation from g enerating stations to big power c onsumers A erial lines with bare conductors - Bare soft drawn stranded c opper conductors - Bare hard drawn stranded c opper conductors.
OVERHEAD POWER LINES
*LSZH : Low Smoke Zero Halogen m aterial
Outdoor low voltage cables are
u sually exposed to serious weather i nfluences, high mechanical stresses and d angerous chemical attacks,
For these reasons, they are
c haracterized by increased thickness in t he insulation and in the protecting outer s heath, as well as by special insulating a nd sheathing in case of presence of v arious dangerous chemicals in the g round, where the cables are to be p laced and whenever fire retardant q ualities are required in case of fire.
When the cables are destined to be
b uried direct in ground, they are n ormally protected with steel tape,quotesdbs_dbs2.pdfusesText_2
Fil souple HO5V-K - Legallais