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Experimental Research of Damage Occurred on Large Cross-Section Conductor by Different Patterns of String Pulley

To study conductor damage induced by different patterns of string pulley in process of tension stringing, damage experiment is performed on string pulleys with multi wheels and single wheel. Damages occurred on conductor by two different kinds of string pulleys are analyzed. Results show that there are no significant decrements in strength of conductor with trapezoidal conductor when it is passing through different patterns of string pulley. It indicates that damages on conductor with trapezoidal conductor caused by both types of string pulley are similar. It is also found that average strength of conductor with circular conductor decreases 1.60% and 2.99% when conductor is passing through string pulley with single wheel and multi wheels over twenty times. It is concluded that strength damage on conductor with circular conductor induced by multi wheels is a little larger than that by single wheel