Demandez à une équipe de pose ce qui maintient un câble ADSS sur le poteau, et la plupart des réponses commencent et finissent par les étriers. La réponse exacte est un système de six familles de pièces qui répartissent le travail mécanique entre elles. Le câble repose sur des supports en milieu de portée, est ancré à chaque extrémité morte, frotte contre les accessoires et chante dans le vent. Imaginez le tracé comme une chaîne d'opérations, car chaque opération correspond à une famille de pièces conçue à cet effet.
Depuis 2003, RaxPower fabrique du matériel de ligne sur poteau et de ligne aérienne pour les utilities, les entrepreneurs et les distributeurs. Ses plus de 170 spécialistes travaillent selon un système qualité ISO 9001, et le forgeage à chaud confère aux pièces leur résistance nominale. Le catalogue couvre également des pièces OEM et sur mesure réalisées selon les plans des clients. La présentation détaillée ci-dessous recense les principaux types de matériel ADSS famille par famille. Chaque section traite de la construction, des matériaux, de la façon dont la pièce saisit le câble et des paramètres qui déterminent sa taille.
Six familles de pièces qui assurent une portée ADSS
Quiconque compare les types de pièces pour câbles ADSS devrait d'abord examiner le travail mécanique accompli par chaque famille. Chaque pièce montée sur une structure appartient à l'une des six familles, et chacune répond à une question mécanique spécifique. Le tableau ci-dessous sert de carte pour le reste de cet article.
| Famille de pièces | Travail mécanique | Emplacement |
|---|---|---|
| Ensemble de suspension | Supporte le poids vertical, sans prise longitudinale | Structures tangentielles (droites) |
| Ensemble de tension / extrémité morte | Ancre la tension pleine portée | Extrémités, angles, structures de changement de direction |
| Barres d'armure | Répartissent la pression de l'étrier, protègent la gaine | Sous les étriers et les amortisseurs |
| Amortisseurs de vibration | Dissipent l'énergie des vibrations induites par le vent | Près des points de suspension et d'extrémité morte |
| Matériel d'attache et de liaison | Relie l'ensemble étrier à la structure | Entre la pièce et le poteau ou le mât |
| Capuchons d'épissage et étriers de descente | Protègent les épissures, guident les descentes | Le long du tracé et sur le poteau |
La distinction est importante car les deux familles d'étriers supportent des charges différentes. Un ensemble de suspension soutient le poids du câble ; un ensemble de tension absorbe la traction longitudinale intégrale de la portée. Confondre ces deux charges, c'est associer le mauvais matériel à la mauvaise force, d'où l'intérêt de bien clarifier la différence avant de citer tout kit.
Les kits ADSS se différencient des kits OPGW par la surface du câble et l'exposition électrique, même si la logique des six familles est partagée. La même vue en six familles s'applique à tout kit de pièces ADSS / OPGW avec de légers échanges de matériaux.
Ensembles de suspension : tiges préformées qui épaulent le câble
Ce que contient l'ensemble
A preformed suspension set has four parts: an inner rod layer, an outer rod layer, elastomer inserts, and a housing that hangs from the linkage. The rods wrap helically around the cable, so grip pressure spreads over a long contact area instead of one bolt point. Published ratings put the holding force at only 10-20% of the cable’s rated tensile strength, which is intentional. The set is not supposed to clamp hard; it cradles.
Manufacturers rate preformed suspension sets for line angles up to about 30 degrees. The smooth, rod-wrapped profile also keeps the electric field around the cable even, which lowers corona discharge on high-voltage routes.
Les alternatives à crochet en J et de style tangent
Where spans are short and loads are light, a formed J-hook body in aluminum alloy with a UV-resistant elastomer insert does the same job with fewer parts. The cable rests in the insert, the insert allows slight sliding under temperature and wind movement, and the vertical load passes into the pole. Non-metallic contact surfaces keep the dielectric sheath isolated from the structure.
For short urban runs under 100 m, a simple tangent clamp — shell, rubber insert, bolt hardware — is the lightest straight-line support of the family. One production example of this hardware class is the serre-câble de suspension ADSS, which shows how housing, insert and linkage arrive as a matched assembly.
Ensembles de tension et d'extrémité morte conçus pour la charge pleine portée
At a dead end, the fitting must hold the entire longitudinal tension of the span, not just the weight of the cable. Where a suspension set cradles, a tension set bites, the way you would wrap a rope around a post before tying it off. When the line turns hard at a river crossing, the same set also carries the resultant pull of that turn.
A preformed tension set stacks two helical rod layers over the cable and finishes in a pulling ring or loop. Inner rods match the cable diameter; outer rods add grip length and stiffness. Manufacturer data credits these sets with holding at least 95% of the cable’s rated tensile strength, without local stress concentrations. That is why they anchor terminations, tensioning structures and corner poles.
Variantes courte portée et monocouche
Single-layer tension clamps compress the concept into one wrapped layer plus a pulling ring and U-shaped ring, rated for spans of roughly 50-200 m. Their preformed wires come in aluminum-clad steel or aluminum alloy, matched to the cable jacket and the span exposure.
Barres d'armure : la couche sacrificielle sous chaque étrier
Armor rods are helical rods of aluminum alloy or aluminum-clad steel wrapped directly over the cable at support points. They are the first thing to touch the sheath, and the first thing to wear out, which is exactly their job.
Three functions justify the extra line item:
- They spread clamp pressure over a longer contact area, so the sheath sees compression instead of point loads.
- They add bending stiffness at the support, where flex fatigue concentrates.
- They set the measuring datum for vibration dampers, which are placed from the end of the rod rather than from the clamp bolt.
In our experience, skipping armor rods to save one part number is the fastest route to a sheath-damage claim two winters later. Armor rods belong to the broader fil formé family that also covers guy grips and dead-end grips for conductor and earth-wire work.
Amortisseurs de vibration : comparatif des modèles spiral et Stockbridge
Smooth laminar wind at roughly 1-7 m/s makes an ADSS cable shed vortices and oscillate in the 3-150 Hz band. Left unchecked, this aeolian vibration is a leading cause of cable fatigue failure. Dampers exist to take that energy out of the cable before it concentrates at hardware edges.
Amortisseurs spiraux
A spiral vibration damper is a helix of weather-resistant, non-corrosive plastic whose small gripping section holds the cable without crushing it. It damps broadly across frequencies but shallowly, and it forgives placement error. Placement rules still apply: about one hand-width (roughly 5 in) from the ends of armor rods or other hardware, and up to three units nested in tandem. Model ranges cover cable diameters from about 6.35 mm to 31.75 mm, color-coded per range, as documented on AFL’s spiral vibration damper for ADSS cable page.
Amortisseurs Stockbridge
A Stockbridge damper hangs two masses on a short flexible messenger cable clamped at its middle. It damps deeply but only near its tuned frequency, so the unit must sit close to a vibration antinode rather than a node. TTI Fiber’s ADSS vibration damper spacing analysis is the clearest engineering write-up of that positioning problem.
Working damper counts by span: below roughly 200 m, usually none, because cable self-damping is enough; 200-400 m, two dampers, one per end; 400-700 m, four; beyond about 700 m, six or more plus a dedicated vibration study.
Both styles sit inside the wider groupe d'amortisseur et d'espacement program that also covers spacers and dampers for bundled conductor lines.
Matériel d'attache au poteau et de liaison entre l'étrier et la structure
None of the clamp families mounts itself. A pole band or bracket adapts the structure, and a short stack of link fittings — ball clevis, socket clevis, flat-eye plates — connects that bracket to the clamp assembly. Wood, concrete and steel poles each take different bands, which is why kit lists start by asking for the structure type.
Link fittings are typically hot-dip galvanized steel, specified for strength, while the clamp bodies above them stay aluminum alloy for low weight and smooth surfaces. Getting that stack right is a fitting-selection task in its own right, not an afterthought.
Capuchons d'épissage et étriers de chute le long du tracé
Wherever two cable ends meet, a splice closure keeps the fusion points dry, organized and re-enterable. Dome closures sit vertically on the pole or in pedestals; in-line (horizontal) closures continue the cable run. The fermeture en dôme category covers the vertical style used on most distribution pole routes.
Down-lead clamps are the forgotten half of this family. They guide the cable from overhead down the pole face to the closure or cabinet, holding it without crushing. Because ADSS carries no metallic parts, the down-leg needs no grounding kit — a small labor saving that compounds across hundreds of poles.
Associer chaque pièce à la portée, au poteau et à la tension
Span length and line geometry pick the clamp family first:
- Under about 100 m on straight runs: tangent clamps and light suspension hardware.
- Roughly 50-200 m with anchors and corners: single-layer tension clamps.
- Longer spans with line angles up to about 30 degrees: full preformed suspension sets.
- Crossings near or above 800 m, or angles of 30-60 degrees: double preformed suspension sets with hanging plate and triangular joint plate.
- Every dead end, at any length: preformed tension sets rated at 95% or more of cable RTS.
Structure type picks the attachment: bands for wood and concrete, bracket kits for steel. Voltage decides the electrical extras. ADSS is fully dielectric, so no grounding hardware rides the cable, but the sheath still lives in an electric field. On lines of 220 kV and above, anti-corona rings trim the field at fitting ends, and cable qualification follows IEEE 1222, the ADSS testing standard for overhead utility lines.
Ce qui constitue un kit complet de pièces ADSS
Procurement teams rarely buy one family at a time; they buy per structure. A kit quoted that way can be checked against the route drawing line by line:
- Tangent structure kit: suspension set or J-hook clamp, armor rods, attachment band, link hardware, and dampers if the span table calls for them.
- Dead-end kit: tension set, armor rods, pole band or anchor bracket, link hardware, and down-lead clamps to the closure.
- Route extras: dome or in-line closures, down-lead clamps, and anti-corona rings where the voltage class demands them.
Check each quoted component against its cable diameter range, its span rating, and the structure it will actually mount on. Those three checks catch most specification mistakes before they leave the desk.
Assembler les six familles
Read as a set, the six families describe one load path: tension sets anchor, suspension sets support, armor rods cushion, dampers calm, link hardware connects, and closures finish the route. Treat any single fitting quoted in isolation with suspicion. Whichever of the types of ADSS cable fittings a quote contains, its rating only means something next to the cable diameter, span and structure it serves. RaxPower has manufactured these families as matched overhead-line hardware since 2003, offering them as catalog or custom-engineered pieces under its ISO 9001 quality system.
Questions fréquemment posées
Que fait exactement un ensemble de suspension ADSS ?
It supports the vertical weight of the cable at intermediate poles without gripping it longitudinally. Preformed rods and elastomer inserts spread the load, hold roughly 10-20% of cable RTS, and suit line angles up to about 30 degrees.
En quoi un étrier de tension (extrémité morte) diffère-t-il d'un étrier de suspension ?
A tension set anchors the full longitudinal pull of the span at terminations and corners, gripping at 95% or more of cable RTS. A suspension set only carries vertical weight and lets the cable pass through.
Toutes les portées ADSS ont-elles besoin d'amortisseurs de vibration ?
No. Spans under roughly 200 m usually rely on the cable’s own damping. Longer runs commonly take two dampers at 200-400 m, four at 400-700 m, and six or more beyond 700 m, plus a vibration study.
Pourquoi installe-t-on des barres d'armure sous les étriers ?
They spread clamp pressure, add bending stiffness at the support, and shield the sheath from abrasion. They also provide the datum point from which damper placement is measured.
Quel matériel permet d'attacher les pièces ADSS au poteau ?
A pole band or bracket adapts the structure, then link fittings such as ball clevises and socket clevises connect it to the clamp assembly. Wood, concrete and steel structures each take different bands.
Que contient un kit complet de quincaillerie ADSS ?
Typically a suspension or tension set per structure, armor rods, pole bands and link hardware, dampers where the span calls for them, down-lead clamps, and splice closures.