Fusing practices on distribution systems

Discussion of fusing practices on distribution systems with numerous operating engineers gives the impression that there are almost as many practices as there are operating companies. To determine present fusing practices in this country, a questionnaire was submitted to some 200 operating companies, and replies were received from 168, indicating a real interest in this subject. The data presented here apply only to systems operating below five kilovolts and were obtained from companies located in all arts of the country. All fuse link data are given on the basis of N rated links. The small amount of data which was received involving 65 per cent rated ks has been converted to equivalent N denoting. No attempt is made to weigh — data by taking into consideration size of the operating company, as it the intention to show engineering-ought on the subject.