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Standards IEC 60947-1, IEC 60947-3, DIN VDE 0660 Part 107
Disconnector Type 3NJ41 0 3NJ41 2 3NJ41 3 3NJ41 4 3NJ41 8 3NJ41 5 3NJ56
Conventional thermal currents
in air I
th
A 160 250 400 630 910 1000 1250
in the enclosure I
the
A 160 225 360 567 – – –
Rated insulating voltage U
i
V 750 1000 1000 1000 500 1000 1000
Rated operating voltage U
e
AC 40…60 Hz V 690 690 690 690 400 690 690
Rated conditional short-circuit current
with fuses
at 690 V AC 40 to 60 Hz kA (RMS value) 50 50 50 50 50 – 50
Rated current I
n
A 160 250 400 630 910 – 1250
of the fuses
Permissible fuse let-through current kA 15 28 39 52 53 – 80
(peak value)
For fuse links Size/A 00/160 1/250 1 and 2/250 2and 3/400 3/910 – 4a/1250
Acc. to IEC 60269-2-1 and isolating links
and 400 and 630
Rated operating current I
e
at
400 V AC AC-22B A 160 250 400 630 910 1000 1250
500 V AC AC-22B A 160 250 400 630 – 1000 1250
690 V AC AC-21B A 160 250 400 630 – 1000 1250
690 V AC AC-22B A 100 200 315 500 – 600 –
220 V DC DC-21B A 160 250 400 630 – – –
Permissible ambient temperature
°C –25 to +55
Mechanical endurance Operating cycles
1400 1400 800 800 800 800 800
Electrical endurance Operating cycles
200 200 200 200 100 100 100
Main phase connection
Flat busbars mm 24 42 42 42 80 80 80
Cable lug, max. conductor cross section
(multi-conductor) mm
2
95 240 240 240 2x240 2x240 2x300
Clamping bar mm
2
1.5–70 25–300 25–300 25–300 – – –
Tightening torque Nm 10–15 30–35 30–35 30–35 30–35 30–35 50–60
(Cable lug, flat busbar)
Technical data: Fuse switch disconnectors 3NJ4
Fuse switch disconnectors 3NJ – the highlights:
 Standard grid dimensions for extremely straightforward engineering
 High packaging density for distribution systems with several cable outlets
 Connection either at the top or bottom
 Fast mounting and installation using the clip-on mounting elements at the rear (for sizes 1 to 3)
 Extended shock hazard protection – safe from touch from the back of the hand when the upper section is
removed (degree of protection: IP10)
 Can be locked and sealed against unauthorized operation
 TTA type-tested installation versions in the SIKUS in-line electrical cabinet system
 Wide conductor clamping range using V terminal with pressure contact that can be rotated
Standards IEC 60947-3
Disconnector Type 3NJ61 10 3NJ61 20 3NJ61 40 3NJ61 60
Rated continuous current I
u
for fuse links according to DIN 43620 A 160 250 400 630
Rated operating voltage U
e
50 Hz/60 Hz AC V 690/500 690 690 690
Rated operating voltage U
i
V 100 (U
imp
= 8000 V)
Rated conditional short-circuit current
Short-circuit strength kA (RMS value) 100 100 100 100
Short-circuit making capacity kA (RMS value) 50 50 50 50
Rated operating current I
e
for single interruption (3NJ61 …-3E…)
at 500V AC AC-22B A 160 250 400 630
at 690V AC AC-21B A 100 250 400 630
for double interruption (3NJ61 …-3M…)
at 500V AC AC-23B A 160 250 400 630
at 690V AC AC-23B A 100 250 400 630
Technical data: Plug-in switch disconnectors with fuses 3NJ6