Line Fittings | Quad-Bundle Conductor Damping Spacer Damper for 500kV-1000kV UHV Lines

Line Fittings | Quad-Bundle Conductor Damping Spacer Damper for 500kV-1000kV UHV Lines is a heavy-duty square-frame quad-bundle damping spacer damper engineered for 500kV, 750kV and 1000kV extra-high-voltage (EHV) and ultra-high-voltage (UHV) 4-conductor bundled transmission lines. Featuring a high-strength cast aluminium alloy square structural frame with four articulating corner damping arms, it maintains precise square sub-conductor spacing while dissipating intense aeolian vibration and subspan oscillation forces.

Bundled conductor lines and substation soft busbar configurations face severe operational challenges from wind-induced aeolian vibration, wake-induced subspan oscillation, and massive electrodynamic attraction forces during short-circuit faults. Our precision-engineered spacer dampers provide optimal dynamic damping, mechanical stability, and corona suppression, ensuring maximum electrical grid security and extended conductor operational longevity.

Key Design & Performance Highlights:

• Material & Construction: High-strength heat-treated cast aluminium alloy frame (ZL101A/A356), precision articulated damping joints with high-loss-factor elastomer damping bushings, and Grade 8.8 hot-dip galvanized / stainless steel hardware.
• Subspan Oscillation & Vibration Suppression: Engineered articulation angles and high-loss-factor elastomer damping bushings dissipate dynamic oscillation energy, reducing subspan bending strain below safe fatigue thresholds.
• High Mechanical & Short-Circuit Withstand: Robust structural design capable of enduring severe short-circuit electromagnetic compression and tension shock loads without permanent distortion.
• Corona & RIV Free: Smooth contoured profiles, radiused edges, and shielded fastening hardware eliminate corona discharge and radio interference on high-voltage and UHV circuits.
• Industry Approvals & Standards: Manufactured in strict accordance with GB/T 2338, DL/T 757, IEC 61854, IEEE 664; ISO 9001 certified with full mechanical, electrical, and dynamic fatigue test compliance.