Anti -
storm fuse (VS)
VS type fuses are fuses manufactured with fuse link wires made of thermosetting alloys specially designed to have a stable electrical behavior with the alterations normally produced by overheating due to overloads. The VS fuse has excellent handling in the overload segment except that it is slower at the high current end.
The superior surge resistance makes the probability of lightning damage very small, which makes the VS fuse ideal for the protection of small to medium KVA distribution transformers especially in rural areas.
The fast section, like the slow has four alloyed copper-nickel wires in parallel,pressed on the ferrue and bushing, joined by a soldered juncture.
In VS type fuses when operating with fault currents or overloads they transmit sufficient temperatura through the fuse wires to the welded joint causing melting of the weld and opening of the circuit.
Nuisance Operations of Distribution Fuse Links Due to Lightning-Induced Current Surges
Abstract — The probability of nuisance operations of distribution fuse links due to lightning-induced current surges is the subject of much discussion today. This discussion is driven, in part, by the practice of moving the surge arrester to the transformer tank to improve overvoltage protection of the transformer. One consequence of this practice is that the probability of nuisance operation of the fuse link protecting the transformer will increase significantly unless larger fuse-link sizes are employed, or unless high-surge-capacity fuse links are used. Section II of this paper escribes a method for determining the probability of nuisance operations of fuse links under various conditions. Section III describes one utility’s experience with moving the arrester to the transformer tank, and also its success with high-surge-capacity fuse links
*C. L. Smallwood, H. S. Regina and C. J. Cook, "Nuisance Operations of Distribution Fuse Links Due to Lightning-Induced Current Surges," 2006 IEEE Rural Electric Power Conference, Albuquerque, NM, USA, 2006, pp. 1-7, doi: 10.1109/REPCON.2006.1649052. keywords: {Fuses;Power transformer insulation;Surge protection;Arresters;Lightning;Voltage control;Wire;Cable insulation;Dielectrics and electrical insulation;USA Councils},
The superior surge resistance makes the probability of lightning damage very small, which makes the VS fuse ideal for the protection of small to medium KVA distribution transformers especially in rural areas.
The fast section, like the slow has four alloyed copper-nickel wires in parallel,pressed on the ferrue and bushing, joined by a soldered juncture.
In VS type fuses when operating with fault currents or overloads they transmit sufficient temperatura through the fuse wires to the welded joint causing melting of the weld and opening of the circuit.
Nuisance Operations of Distribution Fuse Links Due to Lightning-Induced Current Surges
Abstract — The probability of nuisance operations of distribution fuse links due to lightning-induced current surges is the subject of much discussion today. This discussion is driven, in part, by the practice of moving the surge arrester to the transformer tank to improve overvoltage protection of the transformer. One consequence of this practice is that the probability of nuisance operation of the fuse link protecting the transformer will increase significantly unless larger fuse-link sizes are employed, or unless high-surge-capacity fuse links are used. Section II of this paper escribes a method for determining the probability of nuisance operations of fuse links under various conditions. Section III describes one utility’s experience with moving the arrester to the transformer tank, and also its success with high-surge-capacity fuse links