GBSMC2026-1348_TRA_Dervaux_Brochure dampers_A4_V5_HD

Damping System Products

Sicame Group is one of the key players in the electrical equipment business worldwide. It has been able to adapt and develop to support the continuous evolution of electricity infrastructure in France and around the world, and become the largest independent entity in its sector.

A true player in the energy transition, it offers its customers new products and services to improve energy efficiency, deal with environmental risks and support the development of electric vehicle and solar power plant markets.

70

600

3,600

Our fields of activity

Sicame Group is specialised in products and services related to transmission and distribution of electrical energy, renewables, electro-mobility, safety equipment and industrial applications.

With decades of history and recognized expertise, our Transmission division is specialized in designing, manufacturing and producing comprehensive ranges of transmission lines and systems connectors, damping systems, hardware and most advanced substation fitting solutions, adapted to the most technical configurations such as 8-bundle spacer dampers, UHV HVDC connectors and innovative high temperature conductor’s accessories.

Different clamping solutions

Require different requirements based upon:

• International recommendations

• Utilities standards

Salvi can supply solutions with all possible combinations:

Locking system

• A, C - Bolted clamping system

• B - Preformed clamping system

• B, D - Boltless clamping system

Clamp type

• A - Cantilever clamp

• C, D - Inverted hinge clamp

• B - Half open clamp

Coupling Types

• A, C - Metal to metal

• B, D - Rubber lined clamp

Two to eight bundle spacer dampers

The range of Salvi SD covers all possible applications: Voltage up to 1.200 kV Bundle Spacing up to 1.200 mm – Any conductor types (ACSR, AAC, AAAC, ACAR) and clamping solutions.

Salvi’s expertise in R&D, design & test has and continues to assist Engineers, Consultants and Utilities globally, with new types of spacer dampers for all type of configurations.

Vibration dampers (VD)

In order to satisfy several demands of the market, our range of VD is very wide. It includes models with galvanized steel or melted Zamac masses and models with galvanized steel or stainless steel messenger cable.

Manufacturing

Special products

Salvi is also specialized in executing projects which have a high technological content which requires a highly qualified internal organization, cutting edge laboratory equipment and a strict collaboration with Research Centres and Universities. Few examples are shown hereunder.

tests

The following tests were performed on Spacer Dampers and Vibration Dampers are carried out in our laboratory:

• Fatigue test

• Simulation of short circuit

• Slippage of clamps

• Verification of damping performances

Complete assembly of spacer dampers and Vibration Dampers is carried out by Salvi with automatic assembly lines.

Annual production capacity.

Spacer Dampers (2 to 8 bundle conductors)

Damping systems

Aeolian vibrations and sub-span oscillations are the adverse phenomena induced by wind action that shall be controlled in order to safeguard the life of the transmission lines.

This is always the target of Salvi design of Damping Systems.

An overview on Salvi damping systems

Vibrations induced by the wind on single and bundled conductors generate undesirable and dangerous phenomena on the OHTL:

• Aeolian Vibration (Vortex Shedding)

• Wake Induced Oscillation (Sub-Span Oscillation)

They will be kept under control using a proper Damping Systems made by Spacer Dampers and Vibration Dampers.

Aeolian vibration

Aeolian Vibration’s effect is conductor fatigue. Fatigue is the result of a combined effect of alternate bending strain and of fretting among the single wires of the conductor (in HVTL stranded cables).

Fretting causes the generation of micro-cracks which, depending on the strain level, may cause failure of the single wires and finally of the conductor.

Aeolian Vibration can occur on single and bundle conductor configuration.

When Single and Bundle

Caused by Vortex shedding

Winds Moderates

Amplitudes Small (up to one cable diameter)

Frequencies 5 – 100 Hz

Effect Fatigue (bending + fretting)

Controlled by Vibration Damper – Spacer Damper

Analytical evaluation

Damping Systems design

An optimum Damping Systems is designed evaluating the two vibration phenomena (Aeolian and Sub-Conductor vibration) on the OHTL, by means a damping study, carried out with a validated software.

Input data

Type of conductor (stranding, diameter, mass per unit length)

• Bundle spacing in inches or mm

• Tensile load at the coldest period of the year

• EDS

• Span lengths (presence of long spans)

• Type of terrain

• Maximum wind speed

• Type of spacer dampers

• Number of spacer dampers

• Staggering of spacer dampers

Damping systems validation

The validation of a Damping System is carried out with measurements performed by Salvi equipment and personnel on the site i.e., (FIELD TEST).

Such tests verify the real level of vibrations compared with evaluation at the design stage with the analytical method i.e., (DAMPING STUDY).

Sub-span oscillations

• Occur only on bundle conductors with at least one couple of sub-conductors with one in the wake of the other

• It is an instability phenomenon due to the coupling of bundle vertical and horizontal modes of vibration

• Sub-span oscillations may cause sub-conductor clashing with possible conductor breakage

When Bundle Caused by Wake effect

Winds Medium / High speed (V> 7 m/s)

Amplitudes High (up to conductor spacing)

Frequencies 0,7 – 5 Hz

Effect Clashing – Clamp bolts loosening

Controlled by Spacer Dampers staggering

Vibration damper

Clamp and keeper

Crimped masses

Messenger cable

Definition of the proper vibration damper, relevant spacing and needed quantities are defined by a Damping Study, either by contacting us or through the web software platform.

Vibration damper Catalog Number code: VD 23 32 CD B X

“VD” Vibration Damper (Stockbridge four resonances)

“23” Minimum clamp range diameter in mm

“32” Maximum clamp range diameter in mm

“CD” Damper masses type

“B” If present, means the option with stainless steel breakaway nut

“X” If present, means the option with stainless steel messenger cable

“U” If present, means the option with imperial fasteners

of the complete Vibration Damper

Vibration Damper can be installed with or without armor rod.

Vibration damper selection

Damper Masses type Selection depending of cable diameter

In case of Damper installed on armor rod, selection of the adequate range of Clamp Diameter

Ex:

• Cable Ø23,3 without armor rod → CD mass type + “2332” clamp capacity → VD2332CD

• Cable Ø23,3 with Ø6,35 mm armor rod → CD mass type + “3242” clamp capacity (23,3+2x6,35=Ø36) → VD3242CD

In case of overlapping for selection of the Damper Masses type and for general cases, the Vibration Damper reference will be validated according to the Damping Analysis. Some conditions (tension load, specific weather conditions, …) can impact the selection of the Vibration Damper.

Plastic spiral vibration damper

Plastic spiral vibration dampers are designed to minimize damage to conductor and strand from vibration due to wind and reduce overall vibration on cables.

Description

Spiral Vibration Dampers (SVD) effectively control Aeolian vibration on small diameter cables and conductors and avoids cable fatigue, and hardware failure.

Features

• For cables smaller than 1.35” (34.30 mm) in diameter

• Provides control and protection against aeolian vibrations induced by wind action in order to safeguard the life of the transmission lines

• Free hand installation. No tools are required

• Spiral vibration dampers along with spacer dampers and stockbridge vibration dampers complete the full range of motion devices available for vibration damping in cables and conductors

Construction and installation

• Made of weather and corrosion resistant thermoplastic material

• The helically formed rod has a smaller diameter area for gripping the cable/conductor and a larger diameter area for the damping section

• Ideal for use on:

• Bare conductor

• Covered conductor

• Overhead shield wire

• Optical Ground Wire (OPGW)

• Optical Fiber Cable (OFC)

UV Stabilized PVC

Spacer damper

Salvi spacer damper designs consist of modular components, which allow to combine all the frames shapes and dimensions with the various clamping systems. In such a way we achieve the largest range of options available in the market, able to satisfy the various customer’s demands and technical specifications.

As explained above the definition of the optimum system (quantities and relevant installation distances per span), depends on an accurate damping study performed using the input data received.

Spacer damper code identification

SD4x45A C G 32 XX XX

Frame code Clamp type Fastener type (for C or H clamp)

Frame code

The suffix “SD” meaning "Spacer Damper" to which add

Conductor range Hinges rubber options Rubber liner options in the clamps

• Number for Bundle (2x = Double, 3x = Triple, 4x = Quadruple, 6x = Sextuple)

• Spacing in cm (40, 45, 50, 60 etc.)

• Frame shape (S = Symmetric, A = Asymmetric, V = Vertical, D = Diamond)

Clamp type

C Cantilever clamp metal to metal with fastener

H Inverted hinge clamp metal to metal with fasteners

N Nutcracker clamp with rubber liner, boltless (<= 500 kV)

NL Nutcracker clamp with rubber liner, boltless with larger width (> 500 kV)

P Pre-formed clamp with retaining rods, boltless

PL Pre-formed clamp with retaining rods, boltless with larger widths (special applications)

Fastener type

for C or H clamp (excluded boltless clamp types)

G Galvanized bolt + Galva Belleville washer + Stainless steel flat washer

X Stainless steel bolt + Galva Belleville washer + Stainless steel flat washer

B Breakaway (Stainless steel) + Galva Belleville washer + Stainless steel flat washer

Conductor range

Final two digits for cantilever, inverted hinge & nutcracker for defining the maximum range. Final three digits for pre-formed and auto clamp for defining the conductor diameter.

Hinges rubber options

(if applicable add those letters)

HR High resistance hinge rubber

LT Low temperature hinge rubber

R Equipotentiality

Rubber liner options in the clamps

(applicable only for pre-fomed clamp, as nutcracker is always for high temp)

HT High temperature clamp liner

Frame and bundle available

SD2x50V

SD4x45A

SD4x45D

Cantilever bolted clamp metal to metal (C)

Inverted hinge bolted clamp metal to metal (H)

Nutcracker boltless clamp with liner (N or NL)

Pre-formed (P or PL)

For specific pre-formed boltless clamp, we have a range of capacity from 22 to 45 mm (0.866” to 1,771”) conductor diameter. They are equipped with rubber liners for working with conventional cable, and optionally for high temperature operation. The clamp can be used on all frame configurations.

Please ask us for your specific needs.

Services and IoT solutions

With a dedicated IoT team, Sicame Group is willing to impulse new generation of SmartGrid products communicating to a global IoT platform

Today, our Transmission benefits from this technological advance and proposes connected solutions dedicated to transmission lines specific issues. Our partners will save time and gain peace of mind knowing that our IoT solutions will facilitate daily monitoring and maintenance actions, and guarantee a high quality electrical service for the final user.

• Monitoring, Analysis and Data Management

• Software / Mobile Application

• Multiple features

Analysis

• Vibration Analysis

• Staggering scheme

• BOM

Monitoring

Temperature or resistance Monitoring of

• HTLS Transmission line

• Substation connectors

Management

Asset management of

• iDERPACK

• Transformer Oil

Features

complete Energy Business

Communicate with your Transmission Line

• Reliability

• Availability

• Maintainability

• Safety

5400 J.A. Bombardier Saint-Hubert, Québec - J3Z 1G8, Canada

Phone: +1 450 679 7778

E-mail: info@sicamena.com Website: sicame-energie.com

8950 Pieper Road, Wellington Colorado, USA

Phone: +1 970 599 1050, Email: sales@powerlinesentry.com Website: powerlinesentry.com

Carrer Albert Einstein, 5-7 Pol. Ind. Sesrovires 08635 Sant Esteve Sesrovires, Barcelona, Spain

Phone: +34 937 715 844 Website: sbiconnectors.com

Salvi Eletro Fiitings - Rua Pureza Marques de Oliveira, 63 Núcleo Micro Industrial Pres. Wilson - 06602-010 Jandira, Brazil

Phone: +55 11 4789-9979

E-mail: eletro@eletrofittings.com.br Website: salvibr.com.br

Rua Estrada da Rainha nº 340 4410-030 Serzedo Vila Nova de Gaia, Portugal

Phone: +351 22 730 0240

E-mail: skelt@skelt.pt Website: skelt.pt

Z.I. Le Bec - Allée Ampère - B.P. 49 - 42501 Le Chambon-Feugerolles, France

Phone: +33 (0)4 77 40 17 40

E-mail: info@dervaux.fr

Kronenberg Freileitungsarmaturen GmbH

Hochstraße 2D-42799 Leichlingen

Phone: +49 (0) 2175 8886 - 0

E-mail: info@kbfa.de

Website: kronenberg-leichlingen.de

Via G. Durando, 38 - 20158 Milano, Italia

E-mail: salvi@salvi.eu Website: salvi.eu

S.No.473/1 - No.96, Sirkundram Road Village Chengalpet Taluk, Kancheepuram District - 603 108, India

Phone: +91 44 37270300

E-mail: info@sicame.in Website: sicame.in

CCM Industrial Estate Kav F-1 No.7

Jl. Raya Serang KM 28,5 Balaraja, Tangerang 15610, Banten - Indonesia

Phone: (+62-21) 595 4861-62

E-mail: marketing@sicamindo.com Website: sicamindo.com