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<p>Electrical distribution live-line work (EDW) is crucial for maintaining power supply without disruptions. Indirect live-line work (ILLW), mandated in Korea since 2018, enhances worker safety but increases workload due to heavy tools mounted on long insulation sticks. This additional weight causes fatigue and reduces efficiency. To address this issue, we propose a gravity compensating device (GCD) designed to reduce physical strain by counterbalancing torque. The GCD, mounted on a live-line aerial truck, minimizes the force needed to operate insulation sticks, improving work efficiency. To evaluate its effectiveness, we conducted an electromyographic (EMG) analysis with four male participants, all certified EDW technicians, performing standardized ILLW tasks with and without the GCD. Each participant performed the tasks over two consecutive days under controlled conditions. The results showed statistically significant reductions in muscle activation in the deltoid and biceps brachii muscles (<i>p</i> &lt; 0.05), indicating decreased physical workload. Furthermore, we discuss the GCD’s cost-effectiveness and its potential for commercialization to improve safety and sustainability in EDW operations.</p>

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A Gravity Compensation Device to Reduce Workload for Indirect Live Line Workers

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Young-Sik Jang,
  • Sun-Young Nho,
  • Joon-Young Park

摘要

Electrical distribution live-line work (EDW) is crucial for maintaining power supply without disruptions. Indirect live-line work (ILLW), mandated in Korea since 2018, enhances worker safety but increases workload due to heavy tools mounted on long insulation sticks. This additional weight causes fatigue and reduces efficiency. To address this issue, we propose a gravity compensating device (GCD) designed to reduce physical strain by counterbalancing torque. The GCD, mounted on a live-line aerial truck, minimizes the force needed to operate insulation sticks, improving work efficiency. To evaluate its effectiveness, we conducted an electromyographic (EMG) analysis with four male participants, all certified EDW technicians, performing standardized ILLW tasks with and without the GCD. Each participant performed the tasks over two consecutive days under controlled conditions. The results showed statistically significant reductions in muscle activation in the deltoid and biceps brachii muscles (p < 0.05), indicating decreased physical workload. Furthermore, we discuss the GCD’s cost-effectiveness and its potential for commercialization to improve safety and sustainability in EDW operations.