Study on the Improvement of the Reliability of Al-Cu Connections in Power Distribution Systems

송배전용 Al-Cu접속 금구의 신뢰도 향상일 관한 연구(I) 알루미늄 및 동의 부식 특성

As aluminum becomes more widely used in power distribution systems, so the corrosion caused by bimetallic contacts of aluminum and copper becomes more serious problem. In particular, the poor contact of the commonly used compression type bimetal connections may bring about the disastrous interruption of the power supply resulted from the increased corrosion within the joints, which is accelerated by the permeation of water and electrolyte into the interface. In this paper, the corrosion characteristics of aluminum and copper are investigated to improve the reliability of Al-Cu connectons.