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Tiny cube-shaped fuse is finger-safe
Published:  01 August, 2000

Tiny cube-shaped fuse is finger-safe

Cooper Bussmann claims to have redefined the industrial power fuse with a new product which it says is the smallest and coolest running fuse on the market - and the first to be finger-safe.

All of the components on the CubeFuse - including the fuse elements, base and wire ports - are insulated to IP20, while the recessed blade terminals have an extended insulating sleeve. The result, says Bussmann, is that it is impossible to touch a live terminal, even when replacing the fuse.

The fuseholders, available in 30A and 60A ratings, can clip straight onto a DIN rail without adaptors, or can screw-mount directly onto a panel. Adjacent fuseholders dovetail together and a 30A CubeFuse will fit into a 60A holder, eliminating the need for a reducer. The 30A version occupies roughly a 6.3cm cube, and the 60A version, a 7.6cm cube.

A viewport on the front of the fuse normally appears white, but when the fuse blows it turns black and stays black. Electricians can therefore tell immediately if the fuse has blown.

To minimise arc flash energy and to improve safety, the fuses provide Class J time-delay performance. Because the CubeFuse responds to short-circuit faults faster than other fuses, it reduces damaging let-through thermal and magnetic forces.

The fuses offer Type 2 protection (to IEC 947-4-1) and interrupting ratings of 300kV. They are rated to operate at 600V AC or 300V DC.

Because of the CubeFuse`s novel design, Cooper Bussmann is working with standards authorities to amend existing norms to cater for the new design.

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