NX Style Fuses
NX Style Full Range non indicating Fuses
General
Cooper Power Systems Type NX current-limiting fuses provide
overload protection for all indoor and underground cable distribution systems 2.4 through 34.5 kV. 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 currentlimiting 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 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 an Arc-Strangler loadbreakingdevice, that mounts in a hinge-style mounting is available on 4.3, 5.5, 8.3, and 15.5kV 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 clipstyle 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 currentratings.
Installation
The NX clip- and hinge-style fuses are designed to fit industry standard mountings. Each fuse is marked with its mounting code number. The mounting code number defines the mounting’s insulation level, contact spacing and contact type. NX clipstyle fuses fit 5/8" standard clipstyle mountings in pad-mounted transformers, switchgear, sectionalizing enclosures, industrial vaults, and metal clad switchgear. The NX hinge-style fuses fit the standard hinge-style mountings. The mounting code number of the fuse and the mount must be the same.X-Limiter™ Hinge-mount Current-limiting Fuse
GENERAL
The Cooper Power Systems Combined Technologies (CT) X-Limiter™ hinge-mount fuses are designed to fit the mountings manufactured by S & C Electric Company. The X-Limiter hinge-mount fuses are full-range, current-limiting fuses to be used indoors or for metal clad applications, and outdoors for crossarm mounting or substation
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The availability of the X-Limiter hinge-mount fuse makes it easy to convert from expulsion fuses directly to a full-range, current-limiting fuse in the same mounting. The designs utilize the S & C standard end fittings (hinge-end and latched-end) to ensure a perfect fit in the mountings. The X-Limiter hinge-mount fuse’s
240-56.
APPLICATION
X-Limiter hinge-mount fuses are rated at phase-to-ground voltage. This is an acceptable practice when:
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X-Limiter™ unitized Fuse
GENERALThe Cooper Power Systems Combined Technologies (CT) X-Limiter™ Unitized fuse allows paralleling the two-inch diameter 4.3 kV, 5.5 kV, 8.3 kV and 15.5 kV fuses to fit the NX® Code 1 and Code 2 hinge mountings. It provides double current rated fused switching when a loadbreak feature is not required. The X-Limiter Unitized fuse has the same electrical characteristics and follows the same application criteria as the X-limiter fuse. One operation indicator is included per fuse set. For additional information on contact us at 918.665.6888, or use our fuse search tab at the top of the page. You can also request a quote on any of the Combined Technologies' Fuses using our quote form. |
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For additional information on contact us at 918.665.6888, or use our fuse search tab at the top of the page. You can also request a quote on any of the Combined Technologies' Fuses using our quote form.
Search for more Edison Fuses at www.powerfuse.com: Combined Technologies