www.AFLglobal.com or 800-866-7385 Motion Control © 2003, AFL, all rights reserved. PP-3-00754, Revision 11, 7.9.19 Specifications are subject to change without notice. 378 DAMPERS SPACERS Controls Oscillation and Aeolian Vibration The Spacer Damper is the most efficient way to extend the life span of the transmission line. It is designed to dissipate the damaging vibrations caused by wind. No Special Tools Needed with Breakaway Bolt Option With the breakaway bolt, no special tools nor torque wrench are needed. Simply tighten the bolt until the head shears off, indicating proper torque has been achieved. Customized Designs AFL can engineer a line protection system for any particular project. The Spacer Dampers are available for 3 and 4 conductor bundles. Standard spacing is 18 inches. For alternate spacing and bundle design, contact AFL Technical Support Team. Vibrec ® Damper Recommendation Program The Vibrec damper recommendation program assists in spacer damper requirements for transmission lines. For more information visit www.Vibrec.com or contact the AFL Technical Support Team at 1.800.866.7385. Vibration Recommendation Form can be found on page 403. Features Spacer Dampers with Elastomer Bushed Clamps—280000 Series Spacer dampers were originally developed to suppress bundle conductor subspan oscillations that could cause damage to multi-conductor bundle systems. Later, it was determined that they could be used to control aeolian vibration as well as wake- induced oscillation. The spacer damper is designed to maintain the original geometry of the bundle system against loads. It must also restore the bundle to normal posture after experiencing severe loads due to short-circuit currents, ice and wind. The AFL Spacer Damper combines the function of a spacer in maintaining conductor separation and the function of a damper in controlling aeolian vibration. The viscoelastic bushings firmly grip the conductor. AFL has developed spacer damper designs to meet various bundle configurations and installation requirements. www.AFLglobal.com or 800-866-7385 Motion Control © 2003, AFL, all rights reserved. PP-3-00754, Revision 11, 7.9.19 Specifications are subject to change without notice. 379 DAMPERS SPACERS Table 1: Bundle & Clamp Type Selection SYMMETRIC BUNDLE GEOMETRY PARTIAL AFL NO. CLAMP TYPE CONDUCTOR SPACING NUMBER OF CONDUCTORS IN MM BOLTED 18 457 3 283457 4 284457 PARTIAL AFL NO. CONDUCTOR DIAMETER RANGE DIMENSION WEIGHT (BASED ON 18.00 IN (457 MM) CONDUCTOR SPACING) 3 CONDUCTOR 4 CONDUCTOR A ALUM TOTAL ALUM TOTAL IN MM IN MM LBS KG LBS KG LBS KG LBS KG .267 .976-1.051 24.79-26.71 2.00 51 8.1 3.67 9.1 4.13 9.7 4.40 11.7 5.31 .287 1.052-1.131 26.72-28.74 2.00 51 8.1 3.67 9.1 4.13 9.7 4.40 11.7 5.31 .310 1.132-1.220 28.75-31.00 2.00 51 8.1 3.67 9.0 4.08 9.7 4.40 11.7 5.31 .320 1.221-1.257 31.01-31.94 2.00 51 8.4 3.81 9.5 4.31 10.1 4.58 12.1 5.49 .342 1.258-1.345 31.95-34.17 2.00 51 8.4 3.81 9.5 4.31 10.1 4.58 12.1 5.49 .371 1.346-1.460 34.18-37.09 2.00 51 9.6 4.35 10.9 4.94 11.5 5.22 13.5 6.12 .394 1.461-1.550 37.10-39.38 2.00 51 9.6 4.35 10.8 4.90 11.5 5.22 13.5 6.12 .417 1.551-1.640 39.39-41.67 2.00 51 9.6 4.35 10.8 4.90 11.5 5.22 13.5 6.12 .437 1.641-1.720 41.68-43.70 2.20 56 10.2 4.63 11.3 5.13 12.2 5.53 14.2 6.44 .465 1.721-1.830 43.71-46.49 2.20 56 10.2 4.63 11.3 5.13 12.2 5.53 14.2 6.44 .488 1.831-1.920 46.50-48.78 2.20 56 10.2 4.63 11.2 5.08 12.2 5.53 14.2 6.44 Table 2: Clamp Size Selection 3 Conductor Bundle Bolted Type Clamp 4 Conductor Bundle Bolted Type Clamp Note: Installation instructions for dampers start on page 393. Spacer Dampers with Elastomer Bushed Clamps—280000 Series (cont.) Ordering Instructions Step 1: Select Bundle and Clamp Type Catalog Number Determine conductor bundle and clamp type to get first part of catalog number from Table 1. Step 2: Select Clamp Size Catalog Number Determine clamp size by diameter of conductor to get second part of catalog number from Table 2. For conductor diameter, see pages 387-392. Step 3: Create Catalog Number Example: For a Spacer Damper with bolted clamps for 3 Conductor Bundle of 795 Drake ACSR conductor, the complete Catalog Number is: 283457.287 Clamp Type Number + Clamp Size Number