COMPACT RIGHT-OF-WAYS WITH MULTI-VOLTAGE TOWERS

With increasing transmission requirements, and increasing public pressure to minimize new right-of-ways, utilities are increasing the circuit density to maximize the use of existing right-of-ways. Reduced clearances between circuits, and the arrangement of various voltage-level circuits on the same tower have resulted in a serious increase in induction effects. Problems with voltage unbalance, residual load voltage, ferroresonance, breaker recovery voltage, ground switch duty, and line maintenance have been identified, and solutions presented.