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Power line hardware dulmison dogbone vibration dampers
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This Lot consists of 449 Dulmsion DogBone Vibration Dampers MODEL: DB3-34, CONDUCTOR
DIAMETER RANGE: 1.331-1.486 INCHES, NOMINAL
CONDUCTOR SIZE: 1272, 45/7, 54/19 1351.1, 45/7,
54/19 1431, 45/7, 54/19 1510.5, 45/7 1590.61
* Clamp - cast of high strength aluminium alloy.
* Bolt - stainless steel bolt
* Flat Washer - stainless steel
* Spring Washer - stainless steel
* Messenger - exclusive Heliformed® 19 strand EHS galvanised steel.
Dogbone Dampers are designed to eliminate conductor fatigue damage and line maintenance costs by effectively diminishing aeolian vibration, thereby allowing increased line tensions. The messenger cable and unique dogbone shape of the masses are designed to achieve optimal energy dissipation for minimal clamp movement. The messenger cable and dogbone weights are matched to give additional resonant modes and wider effective frequency response. The mechanical impedance of the damper is matched to the conductor to optimise performance. The offset dogbone shaped masses introduces a torsional mode of vibration damping not present in conventional Stockbridge type dampers. The range of Dogbone Vibration Dampers is a development resulting from our extensive experience and research in the field of conductor vibration control. The Dogbone concept is based on the known and proven principles of the Stockbridge Damper but embodies improvements which increase both power dissipation and range of frequency response beyond those of a Stockbridge Damper. The performance of the Dogbone Damper has been further improved using the latest CIGRE and IEEE ecommended methods including I.S.W.R. Power Dissipation and Mechanical Impedance Testing.
Radio Interference Voltage (RIV): Dogbone Dampers are designed to be corona free at all operating voltages.
Placement: Due to the many parameters involved and the exhaustive tests conducted by Dulmison for optimum damper placement and performance, it is recommended that Dulmison be consulted for exact damper requirements.
