ADSS is an acronym of All-dielectric Self-supporting Optical
Cable. ADSS cable is designed for aerial self supporting application at short,
medium and long span distances.
ADSS fiber cables are with the follow characteristics:
The use of ADSS cables on transmission lines — at 161 kV and
higher — requires a careful approach. It is necessary to determine the optimal
position of the ADSS cable on the tower to ensure safe distance from ADSS cable
to phase conductors and to ground; to provide safe access to ADSS cable for
personnel; and to decrease the electric field, voltage drop and leakage
currents along ADSS cable to avoid corona sources and partial discharges on its
surface that can damage the polyethylene (PE) cable jacket. Read more...
AFL's full line of All-Dielectric Self-Supporting Aerial
(ADSS) Cables meet the demanding needs of transmission and distribution
environments. This high-capacity cable offers great flexibility for placement
on overhead transmission towers, eliminating the need for a support messenger.
All-dielectric cables separately suspended along high
voltage overhead transmission routes are vulnerable to ageing through dry-band
arcing. The differences between this process and dry-band arcing on traditional
high voltage insulators are reviewed.
1. ADSS cables can be installed without shutting off the
power.
2. ADSS cables are excellent AT performance. The maximum
inductive at the operating point of AT sheath can reach 12kV.
3. ADSS is light weight and small diameter reducing the load
caused by ice and wind and the load on towers and back props.
4. The ADSS cable is large span length and the largest span
is over 1000 meters.
ADSS fiber optic cable is loose tube stranded; the tubes are
filled with water resistant filling compound. The cable is consists of number
of fibers containing tubes or fillers stranded in up layers around a central
strength member and bound under a PE jacket. All the fi bers in the cores are
filled with water blocking gel. Fillers may be used to preserve the cable
geometry.
ADSS cable offers a rapid and economical means for
deployment by cable television operators, telephone companies and power
utilities. It is adopted for high voltage, middle, small span conditions in
Power Transmission System or mazy terrain such as river spanning, mountains.
The actual status of overhead power lines is taken into full
consideration when ADSS fiber optic cable is being designed. For overhead power
lines under 100kV, PE outer sheath is applied. For power lines equal to or over
110kV, AT outer sheath is applied. The delicate design of Aramid quantity and
stranding process of the ADSS cable can meet the demand on various spans.
This guide provides general recommendations for the
selection of methods, equipment, and tools for the stringing of Draka Comteq
ADSS (All Dielectric Self-Supporting) fiber optic cables including ezSpan and
Long Span ADSS cables. The installation methods for Draka’s ADSS cables are
essentially the same as those used for installing power utility conductors. The
IEEE Guide to the Installation of Overhead Transmission Line Conductors will
provide additional relevant information about installation practices. Read more...
ADSS cables feature fiber counts up to 576, a dry core
design and the high-tension strength capability required for installation in
the toughest environmental and electrical conditions. Unaffected by
electromagnetic fields, our ADSS cables can be installed and maintained on
extra high-voltage power lines without interruption of power service to
customers. Read more...
Solutions to the problem on all-dielectric self supporting
(ADSS) cables which involve the introduction of controlled conductivity into
the cable are considered. Analysis suggests that arcs which are both
electrically stable and spatially confined must be avoided. It is shown that
the cable can be protected by limiting either the current or the voltage
available to an arc. These considerations reveal that a semiconductive element
does not have to cover the whole cable. Read more...
OFS' PowerGuide ShortSpan DT cable enables faster deployment
and helps lower installation costs through reduced cable preparation time,
increased span length capability and flexible buffer tubes for ease of routing
and management within closures as compared to similar gel-filled product.
The 100% gel-free construction allows for light duty
attachment hardware costing on average 40 percent less per pole than comparable
gel-filled cables on a typical 250 foot span due to lower loaded tension. Additionally, compared to similar gel-filled
cables, up to 60% less labor per dead-end location can be realized by utilizing
hardware not requiring reinforcing rods. Read more...
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