Semi-Solid insulation cross-section having a
partially open space between the conductor and the
insulation perimeter.
Ribbon Cable cable consisting two or
more insulated conductors laid parallel one plane
and held together means adhesive woven
textile yarns.
RG the military designation for coaxial cable in
Mil-C-17.1140
Polyethylene (PE) This material basically pure
hydrocarbon resins with excellent dielectric properties,
i.
Propagation Delay time required for electrical wave
to travel between two points transmission line.
Power Cables Cables several sizes, construction,
and insulation, single multi-conductor, designed to
distribute primary power various types equipment,
such cables 0,6/1 kV. low dielectric constant, low dielectric loss across the
frequency spectrum, mechanically rugged and resists
abrasion and cold ow.
When combined with butylene styrene polymers,
the form compounds such polyethylene and
polypropylene. copolymer of
urethane similar properties neoprene, usually used
as coldcuring moulding compound.
RG/U Abbreviation for Radio Government, Universal. Typical diameter mm,
the dispersion very low.
Resistance Property electric circuit which
determines for given current the rate which
electric energy converted into heat and has a
value, measured ohms.
Singlemode-Fiber small-core optical ber that
supports only one mode light propagation above
the cutoff wavelength.
Printed Wiring printed circuit intended provide
point-to-point electrical connections.
SJ Junior hard service, rubber-insulated pendant
or portable cord. 600 V.
S
S Rubber insulated heavy duty exible cable, stranded
copper wires with separator.
GLOSSARY TERMS: CABLES AND WIRES
. Synonym:
Index Refraction. Radio, Guide, Utility.
Semi-Rigid cable containing exible inner core and
a relatively exible sheathing. Same construction type but
300 Jacket thickness different. The insulating materials derived
from polymerization ethylene gas.
Semi-Rigid PVC hard semi- exible polyvinylchloride
compound with low plasticizer content, (shore 97),
for Termi-Point connecting technique., widely used for wire and cable insulations
and several jackets.
Rubber (Wire Insulation) Term used describe
wire insulations made thermosetting elastomers,
occur naturally may made synthetically.
5HIUDFWLYHLQGH[ The ratio the velocity light
in vacuum its velocity the medium. Singlemode bers are
proper for long distance transmissions. Polymeric materials which the recuring
chemical groups contain silicon and oxygen atoms at
links the main chain.
RMS (Root Mean Square) The effektive value of
an alternating current voltage.
Polyerm material high molecular weight formed
by polymerization lower molecular weight molecules.
Power Factor The ratio between the true power in
watts and the apparent power volts amperes.
Polyurethane (PUR) Class polymers known for
good abrasion and solvent resistance.
SEMKO Approval agency Sweden.
3RO\ROHęQ- group thermoplastics based upon
the unsaturated hydrocarbons, known ole ns.
Primary Coating The plastic coating applied directly
to the cladding surface the ber during manufacture to
preserve the integrity the surface.
R
Rayleigh Scattering The scattering light that
results from small inhomogeneities material
density composition.
Polyvinyl Chloride (PVC) This group of
thermoplastic compounds composed polymers
of polyvinyl chloride its polymer, vinylacetate, in
combination with certain stabilizers, llers, plasticizers,
pigments etc.
Reel revolvable anged device made wood or
metal, Used for winding wires cables.
Polypropylene (PP) thermoplastic similar to
polyethylene but stiffer and having higher softening point
(temperature) excellent electrical properties.
Separator layer insulating material which placed
between conductor and its dielectric, between cable
jacket and the component covers, between various
components multiple-conductor cable.
Silicone thermosetting elastomer with excellent
heat-resistant. Two more colour coded,
stranding with ller, wrapped with separator, rubber
jacket.
6LPSOH[- Transmission only one direction
