Title :
Premature failures in the contacts of drawout clusters
Author :
Furtado, Heloísa Cunha ; Le May, Iain
Author_Institution :
Centro de Pesquisas de Energia Eletrica, Rio de Janeiro, Brazil
Abstract :
Premature failures in the contacts of drawout clusters operating in a pulp mill were investigated. The initial view of the operating and maintenance personnel was that loss of contact spring force was the source of the problem. Investigation showed this to be a secondary effect caused by overheating following interruption of the electrical path and consequent arcing. The primary problem was concluded to be vibration and the inability of the assemblies to maintain contact during this.
Keywords :
electrical contacts; failure analysis; paper industry; arcing; contact; contact spring force; drawout cluster; overheating; premature failure; pulp mill; vibration; Arm; Assembly; Atmosphere; Circuit breakers; Contacts; Joining processes; Length measurement; Milling machines; Personnel; Springs;
Conference_Titel :
Electrical Contacts, 1996. Proceedings of the Forty-Second IEEE Holm Conference on ??. Joint with the 18th International Conference on Electrical Contacts
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-3578-3
DOI :
10.1109/HOLM.1996.557199
