Aerodynamic Disc Suspension Glass Insulator

The aerodynamic disc suspension insulator represents a specialized category within glass electrical insulators, designed with a focus on wind resistance and contamination control. Often referred to as the “straw hat” type due to its distinctive streamlined profile, this product features a large-diameter umbrella disc with a smooth, edgeless lower surface that minimizes air turbulence and reduces wind-induced vibration. It is engineered to address the challenges posed by strong wind zones, sandstorm-prone regions, and areas with high bird activity.
Weixiao manufactures these high-performance suspension insulators transmission line applications demand, and offers flexible customization to align with specific environmental and mechanical requirements.

Suspension Insulators Transmission Line  Specification

Suspension Insulators Transmission Line Core Design

1) Umbrella Shape Design: Large diameter umbrella disk (typically 380mm), with a streamlined and edgeless lower surface to reduce air turbulence and wind resistance, lower the accumulation of sand and bird droppings, and minimize the risk of ice bridging.

2) Basic Structure: Tempered glass component + steel cap + steel foot + cement bonding, inheriting the self-breaking feature at zero value, eliminating the need for pole climbing to measure insulation, and allowing for direct detection and replacement of deteriorated parts.

Suspension Insulators Transmission Line Core Advantages

• Low wind resistance – The streamlined profile reduces wind pressure load, making it particularly suitable for typhoon-prone and high-wind regions while minimizing line vibration fatigue.

• Superior self-cleaning – The edgeless, smooth underside allows wind and rain to easily remove contaminants, reducing the frequency of manual cleaning.

• Bird damage prevention – The large umbrella disc provides effective shielding against bird droppings, often deployed at the top of insulator strings for overall protection.

• Zero-value self-breakage retained – Inherits the glass insulator advantage where faulty units break visibly, eliminating the need for pole-climbing insulation testing.

• Reduced contamination accumulation – The aerodynamic shape minimizes sand, dust, and pollutant buildup, lowering the risk of flashover in moderate pollution environments.

Suspension Insulators Transmission Line Application Scenarios

• Strong wind and typhoon regions – Where reduced wind load directly contributes to line stability

• Desert and gobi areas – Where frequent sandstorms demand superior self-cleaning capability

• Transmission lines with high bird activity – Where large umbrella discs provide effective droppings shielding

• Large-span crossings – Where sensitivity to wind-induced vibration requires lower aerodynamic drag

• High-altitude areas with strong UV exposure – Where durable glass construction resists aging

Selection and Operation and Maintenance Points of Suspension Insulators Transmission Line

1) Selection Principles

• Select the rated breaking load based on the mechanical load of the line (e.g., 70/100/120/160kN).
• Prioritize light to moderate pollution areas; in heavily polluted areas, it is recommended to use in combination with pollution-resistant types or select composite umbrella types.
• In strong wind areas, prioritize models with a suitable structural height and lower wind resistance coefficient (e.g., 127mm structural height).

2) Operation and Maintenance Suggestions

• Inspection Cycle: Every 6-12 months in plains and rural areas, and every 3-6 months in strong wind and sandstorm areas.
• Key Inspection Points: Umbrella disk cracks, rust on steel caps and feet, and self-breaking pieces, and replace them in a timely manner.
• Auxiliary Protection: In areas with high bird activity, add one piece of this type of insulator at the top of the string and install bird spikes.

Suspension Insulators Transmission Line Working Principle

1. Streamlined aerodynamic profile
The large-diameter umbrella disc features a curved, edgeless lower surface that allows air to flow smoothly around the insulator rather than creating turbulent resistance. This reduces wind pressure and minimizes the transmission of wind-induced vibration to the conductor and tower.

2. Extended leakage path with optimized geometry
While maintaining a lower creepage distance compared to anti-pollution types, the disc shape ensures that contaminants do not accumulate on critical surfaces. Wind and rain effectively clear the smooth underside, preserving insulation integrity.

3. Zero-value self-breakage detection
The tempered glass component is manufactured under controlled thermal stress. If a unit becomes electrically degraded, internal stress causes it to shatter visibly—a feature that enables maintenance crews to identify faulty units from the ground without specialized testing equipment.

Quality Control

FAQ

What makes the aerodynamic insulator different from standard types?
Its streamlined, large-diameter umbrella disc reduces wind resistance and vibration, while the smooth lower surface improves self-cleaning—ideal for strong wind, sandstorm, and high bird activity areas.

What mechanical strength options are available?
Models range from 70kN to 300kN failing load, covering most transmission line requirements.

How often should these insulators be inspected?
Every 6–12 months in normal areas; every 3–6 months in strong wind or sandstorm regions.

Can they be used in heavily polluted environments?
They perform best in light to moderate pollution. For heavy industrial or coastal salt spray areas, combine with anti-pollution types in the same string.

How are they packaged for shipment?
Wooden crates with bamboo mat separators to prevent damage during transit. Custom packaging available upon request.