ACSR and AAC Vibration-Resistant Bare Aluminum Cable

ACSR and AAC Vibration-Resistant Bare Aluminum Cable

Applications:

• VR2 cable, a vibration-resistant, bare aluminum construction, is designed for use in overhead applications subject to Aeolian vibration and galloping due to wind and ice.
• VR2 cable can be strung to the maximum allowable tension limits without the need for additional vibration protection. 

Also Known As:

ACSR vibration-resistant conductor, AAC vibration-resistant conductor, Vibration-resistant bare aluminum cable, ACSR VR2 conductor, AAC VR2 conductor, Vibration-resistant overhead conductor, Aeolian vibration-resistant conductor, Trapezoidal wire conductor.

Standards:

• B-231 Aluminum Conductor, Concentric-Lay-Stranded
• B-232 Aluminum Conductor, Concentric-Lay-Stranded, Coated Steel Reinforced (ACSR).
• B-778 Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors (AAC/TW)
• B-779 Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Steel Reinforced (ACSR/TW)

Construction:

• VR2 cable is composed of two identical bare conductors twisted together with a lefthand lay. This gives the cable a figure 8 spiral shape. This spiral shape disrupts the forces created by steady cross winds which cause cable vibration by presenting a continuously changing projected cable diameter to the wind. This spiral shape, together with less torsional stiffness and varying bending stiffness also reduces or eliminates cable galloping due to combined ice and wind. 
• VR2 is engineered with a lay length that changes with conductor diameter. The engineered lay ensures that the product will install without bagging issues while still providing equal or better resistance to Aeolian vibration and ice galloping. The component conductors of VR2 cable can be conductor types AAC, ACSR, AAC/TW, or ACSR/TW meeting the requirements of the appropriate ASTM standard. Other sizes available upon request.