Spacer Damper for ACSR 490/65 - 30.6mm Conductor

Spacer Damper for ACSR 490/65 - 30.6mm Conductor

spacer damper for ACSR 490/65 (30.6 mm diameter conductor) is a key vibration-control device used in multi-bundle transmission lines. It maintains the spacing between sub-conductors while simultaneously damping wind-induced vibrations such as aeolian vibration and galloping. Maintains consistent spacing between conductors, which reduces corona loss and improves line efficiency. Nooa Electric supplies spacer dampers configured according to line design, span length, bundle spacing, and vibration severity.
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Spacer damper maintains conductor spacing and suppresses vibration in bundled conductor systems, ensuring stable and long-term performance. For ACSR 490/65 conductors with a 30.6 mm diameter, spacer dampers are essential to prevent sub-conductor collision, wear, fatigue damage, and vibration-induced failures. They are commonly installed at regular intervals in double-bundle or four-bundle high-voltage transmission lines. Nooa Electric designs spacer dampers using high-strength aluminum alloy arms, galvanized steel hardware, and elastomer damping elements optimized for the vibration characteristics of ACSR 490/65.

Structure & Components of a Spacer Damper

A spacer damper consists of arms, damping elements, clamps, and couplings that work together to control movement and absorb vibration energy.


A standard spacer damper includes:

•  Aluminum alloy arms: lightweight and corrosion-resistant

•  Damping elements (elastomer/thermoplastic): absorb energy from vibration

•  Clamp bodies: designed specifically for 30.6 mm conductor diameter

•  Bolts, nuts, and fasteners: hot-dip galvanized steel

•  Hinges/joints: allow controlled relative movement

•  Anti-slip liners: ensure proper grip on ACSR 490/65 conductors


Every component is engineered to provide balance between stiffness, damping, and flexibility.

Performance Features of Spacer Damper for ACSR 490/65

High damping efficiency, corrosion resistance, conductor protection, and long-term reliability.

1. Vibration & Galloping Control
Spacer dampers:
Minimize aeolian vibration
Reduce sub-conductor clashing
Prevent fatigue failure at suspension points

2. Reduced Wear & Extended Conductor Life
The anti-slip rubber inserts protect the conductor against mechanical damage.

3. Optimized for 30.6 mm ACSR 490/65
The clamp profile ensures a secure fit and uniform pressure around the conductor.

4. High Strength & Corrosion Resistance

Materials include:
Aluminum alloy (arms & body)
Corrosion-resistant steel fasteners
Weather-resistant damping rubber


5. Stable Electrical Performance
Maintains consistent spacing between conductors, which reduces corona loss and improves line efficiency.
Nooa Electric uses advanced dynamic testing to ensure long-term stability under real vibration conditions.

Applications of Spacer Dampers

Ideal for high-voltage bundle lines, windy regions, long spans, and areas with conductor vibration risks.

Common scenarios include:

•  110kV, 132kV, 220kV, 330kV, and 500kV bundled lines

•  Double or four-bundle conductors using ACSR 490/65

•  Mountain areas with strong wind

•  Long-span river crossings

•  Regions prone to galloping or aeolian vibration

Nooa Electric supplies spacer dampers configured according to line design, span length, bundle spacing, and vibration severity.

FAQ: Spacer Damper for ACSR 490/65 – 30.6 mm Conductor

1. What type of conductor uses this spacer damper?
ACSR 490/65 with a diameter of 30.6 mm.


2. Is it suitable for double-bundle or four-bundle lines?
Yes. Spacer dampers are widely used for 2-bundle and 4-bundle high-voltage transmission lines.


3. How often should spacer dampers be installed?
Typically every 60–90 meters, depending on span length and design standards.


4. Do spacer dampers replace vibration dampers?
No. They complement vibration dampers. Both are normally used together.


5. Can Nooa Electric customize the arm length or damping element?
Yes. Nooa Electric offers customization based on bundle spacing, line voltage, and dynamic vibration studies.

Company profile

Who We Are?

Nooa Electric Co., Ltd. - Chinese professional electrical insulators manufacturer with 21+ experience, covering an area of 70,000 square meters, and construction area is 50,000 square meters. There are more than 200 employees, including 25 technicians. The production capacity 3500000 pieces per year, and now setting up the new kiln and lines up to 10500000 pieces per year. We have been specialized in research and development of latest high-strength functional glass and power transmission insulators, which is the qualified supplier for State Grid Corporation of China and Southern State Grid Corporation of China, and is a participating unit of product standard formulation of the national electrical insulator standard committee.


What We Have?

Certificates & Reports: INTERTK, SGS, BV Certificates,Type Test Certificate.

Main Electric Insulators : Standard-type glass insulator (u40(ctv175)/u70(ctv254, ps70e)/u120/u160/u210/u300) , antipollution-type glass insulators (u120bp/u160bsp/u210bp), aerodynamic type glass electrical insulators (ug70bsa/u100bsa/u120bla), multi-umbrella type electric insulators, ground-wires type glass power line insulators (u70cn/u100cn/u120c), post insulator for line, pin glass insulator. Products are mainly used for transmission line insulation, suspension, support, tension conductors. They are divided into 5 major series: The standard type glass insulator 40-550kn, filth-resistant type glass insulators 70-420kn, aerodynamic type glass electrical insulators 120-300kn, multi-umbrella type electric insulators 120-300kn, and ground circuit type high voltage insulators, able to be used for line voltage from 10kv～1000kv.


Core Technology:

Automation Equipment: Siemens fully automatic feeding, stamping, temperature equalization, tempering, hot and cold shock control system.
Independent Product Model: U160BP/146/380/450, U160BP/155/380/450, U210BP/170/420/550 and U300BP/195/420/550.
Advanced Klin: Germany's new generation kiln control system, equipped with brand-new sensors and actuators, and equipped with a high-precision automatic batching system.
Qualification: Passed the quality, environment and occupational health system certification and obtained a number of invention patents.


Goal:

To be the world's largest glass insulators manufacturer.

Electric Insulators Certificates

Are u the electric insulators factory or trading company?
China Leading Electric Insulators Factory founded in 2002
What're your main power insulators?
Powerline Electric Insulators (glass insulators, porcelain insulators, composite insulators ), the fittings and hardwares of all kinds for high-voltage applications and related products.
Can I get some glass insulators samples?
Yes, powerline glass insulator sample order is available for quality check and market test.
What's your payment terms?
We usually accept all kinds of payment terms, T/T, L/C, Western Union.
How can you control your glass power line insulator quality?
For each glass insulator production processing, we have a complete QC system for the chemical composition, physical and electrical properties. After production, all glass power line insulators will be tested according to related standards, and the ex-factory test reports will be sent along with shipment documents.
Does your company accept customization?
We accept OEM service.
What's your warranty terms?
We offer 24 months warranty terms.
Do you have glass electrical insulators in stock?
Depends on your request, we have standard models (CTV254 & CTV175, U40B U70B U120B U160BL U240B U300B ) in stock. Some special product and big order will be newly produced according to your order.

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Room 2221, 22nd Floor, Building 1, Wanxiang Times Garden, No. 676, Renmin East Road, Furong District, Changsha City, Hunan Province, China
Phone : 0086 186-848-89358
Whatsapp : +8615274981317  
Email : info@nooaelectric.com
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