Description
50A 5.5KV NX FUSE
General
Eaton provides overload protection for all indoor
and underground cable distribution systems 2.4
through 34.5 kV with its Cooper Power™ series
NX™ current-limiting fuses. NX fuses are noiseless
and expel no hot gases or burning particles while
interrupting currents from minimum melt to
maximum fuse rating (50,000 A through 23 kV,
35,000 A through 27 and 38 kV). Their current-
limiting capability greatly reduces the momentary
duty on protected equipment, extending the life
and, in some cases, reducing the original cost of
that equipment.
The ability of an NX fuse to interrupt low-current
faults eliminates the need for auxiliary devices to
handle these troublesome current levels. An NX
fuse extends system coordination because it is
fast clearing and current-limiting—conductor and
equipment damage caused by high currents is
virtually eliminated.
Clip-style NX fuse
The basic NX fuse unit (top left) is designed to
mount in a clip-style mounting. Basic clip-style NX
fuses are available in 4.3, 5.5, 8.3, 15.5, 23, 27, and
38 kV ratings.
NX Fuse with Arc-Strangler loadbreak device
An NX fuse with Eaton’s Cooper Power series
Arc-Strangler™ load breaking device, (top middle)
that mounts in a hinge-style mounting is available
on 4.3, 5.5, 8.3, and 15.5 kV fuses. All current
magnitudes from excitation current through 200 A
can be interrupted positively and safely by opening
the fuse with a switch disconnect stick.
These units have the same operating
characteristics as the basic clip-style fuse, along
with loadbreaking capabilities.
Arc-Strangler switchblade
Switchblades with the Arc-Strangler loadbreaking
device are available in 8.3 and 15.5 kV, 200 A
continuous current ratings (top right).
