Dual Element Fuse

This type fuse is also known as a time delay fuse and is used in all single and three phase electric motor starters.

Dual element fuse.

The fuse elements may be shaped to increase heating effect. Because of this dual element fuses can be sized significantly closer to the actual motor load. Bussmann bp frn r 30 30 amp fusetron dual element time delay current limiting class rk5 fuse 250v carded ul listed 2 pack by bussmann 4 5 out of 5 stars 24 12 99 12. Their construction inside with two current flow paths allow the high current of a motor start for a short interval of time without blowing.

A fuse which has current responsive elements of two different fusing characteristics in series explanation of dual element fuse. Limitron fast acting 600v class j fuses jks 1 60a. Looking for dual element fuse. Your answer 2 a fuse designed to operate at a higher current is a fuse with a higher amperage.

Bussmann s ul class rk5 fusetron product offering provides energy efficient advanced protection with its dual element time delay construction and is available with optional open fuse indication on select ratings. Bussmann bp frn r 30 30 amp fusetron dual element time delay current limiting class rk5 fuse 250v carded ul listed 2 pack by bussmann 4 6 out of 5 stars 58 10 99 10. Operate with a temporary overload. A dual element fuse may contain a metal strip that melts instantly on a short circuit and also contain a low melting solder joint that responds to long term overload of low values compared to a short circuit.

Dual element fuses are able to withstand these bursts without inflicting any damage to the motor circuits or the fuse itself. Limitron fast acting 600v class j fuses jks 70 600a. As shown in the preceding illustration close sizing of cooper bussmann dual element fuses in the branch. In large fuses current may be divided between multiple strips of metal.

Dual element fuse benefits the use of time delay dual element fuses affords easy selective coordination coordination hardly requires anything more than a routine check of a tabulation of required selectivity ratios. A dual element fuse is designed for dealing with in rush current ie starting an electric motor. Available in both 250vac and 600vac 200ka rms sym interrupting rating and sizes ranging from 0 to 600 amp. Low peak dual element time delay class j fuses 0 60 amp lpj 0 60.

Whereas if a single element fuse was used it would have to be rated up to 3 times the actual motor current in order to.