Brochure

SENTRON
fuse switch disconnectors 3NJ:
Offer the maximum level of safety
with minimum width.
These specialists combine the ”load switching” and ”isolating” functions in
one device. And thanks to the integrated LV HRC fuses, they also provide
full protection against overload and short-circuit. They distinguish them-
selves as a result of the compact design, which allows them to be mounted
in the smallest space, and the versatile connection types: Whether horizon-
tal or vertical, whether in low-voltage distribution systems, cable distribu-
tion cabinets or sub-stations and transformer stations – everything is
possible using this sophisticated, well-proven system. And last but not least,
also as a result of the wide range of accessories that fulfills every conceiv-
able requirement.
Fuse switch disconnectors 3NJ4
These are the SENTRON devices that are responsible
for handling occasional manual switching and dis-
connection of load feeders and power distribution
systems.
They are able to make and break the specified rated
current. It goes without saying that even under over-
load and short-circuit conditions they completely
fulfill the appropriate plant protection requirements.
Fuse switch disconnectors 3NJ4 are used in
 Power stations and industry as overload and
short-circuit protection for switchboards
 Sub-stations and transformer stations as well as
cable distribution cabinets
 Main distribution systems in commercial buildings
 Cable outlets and distribution panels
 Distribution panels on construction sites and to
feed busbar systems
Plug-in switch disconnectors with fuses 3NJ6
These are closely related to our 3NJ4 in-line fuse
switch disconnectors; the 3NJ6 series of in-line fuse
disconnectors distinguishes itself as a result of the
essential difference – the integrated switching
element with single or double interruption.
Mounting and installation are especially easy thanks
to the straightforward plug-in system. Our 3NJ6 in-
line switch disconnectors are also the optimum
solution when load feeders and cable distribution
systems must be occasionally and manually switched
or disconnected.
Plug-in switch disconnectors with fuses 3NJ6
are especially suitable …
 For cable distribution and electrical cabinets with
busbar systems that are on end and vertically
arranged – in this case, the plug-in system really
comes into its own
 For overload and short-circuit protection for
downstream plant components and loads
 To safely disconnect downstream plant compo-
nents and loads – the switching operation itself is
always inside the disconnector assembly indepen-
dent of the actuation speed.
14 l 15