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Switch Disconnectors
3NJ4, 3NJ5 In-Line Fuse Switch Disconnectors up to 2000 A
Introduction
7/150
Siemens LV 10 · 2014
7
■
Technical specifications
Standards
IEC 60947-1, IEC 60947-3, VDE 0660 Part 107
Type
3NJ410 3NJ412 3NJ413 3NJ414 3NJ56 3NJ415 3NJ418 3NJ416 3NJ417
Conventional thermal current
Free-air with gG fuses,
I
th
A
160
250
400
630
1250 630
800
1260 1600
Free-air with isolating blade,
I
th
A
--
--
--
800
--
1000 1250 1600 2000
Free-air with gTr fuses,
I
th
A
--
--
--
--
1154 722
910
1154 1444
Rated apparent power of the transformer,
S
n
kVA --
--
--
--
800
500
630
800
1000
For fuse links and isolating blades
Size 00
1
2
3
4a
3
3
2 x 3 2 x 3
gG according to IEC 60269,
I
n
A
160
250
400
630
1250 630
800
2 x 630 2 x 800
Free-air with isolating link,
I
n
A
--
--
--
--
--
1000 1250 2 x 800 2 x 1000
gTr according to VDE 0636-2011,
I
rat
A
--
--
--
--
1154 722
909
2 x 577 2 x 722
gTr according to VDE 0636-2011,
S
n
kVA --
--
--
--
800
500
630
2 x 400 2 x 500
Rated operational voltage
U
e
At 40 Hz ...60 Hz AC
V
690
690
690
690
690
690
400
690
400
Rated insulation voltage
U
i
V
800
1000 1000 1000 1000 1000 690
1000 690
Rated impulse withstand voltage
U
imp
kV 8
12
12
12
12
12
8
12
8
Rated conditional short-circuit current
with fuses, at 500 V AC
With gG fuse (rms value)
kA
80/120 120
120
120
80
120
50
80
50
With gTr fuse (rms value)
kA --
--
--
--
--
--
50
--
--
Max. permissible power loss per
fuse link
W 12
32
45
48
110
51
61
48
51
Rated short-time withstand current
I
CW
rms value
kA --
14.5
14.5
14.5
35
14.5
14.5
25
25
Rated making and breaking capacity
Rated operational current
I
e
for gG fuses
At AC-21B
400 V AC A
160
250
400
630
1250 630
800
2 x 630 2 x 800
AC-22B
400 V AC A
160
250
400
630
1250 630
800
2 x 630 2 x 800
AC-23B
400 V AC A
--
250
400
--
--
--
--
--
--
AC-21B
500 V AC A
160
250
400
630
1250 --
--
--
--
AC-22B
500 V AC A
160
250
400
630
1250 --
--
--
--
AC-23B
500 V AC A
--
--
--
--
--
--
--
--
--
AC-21B
690 V AC A
100
250
400
630
1250 --
--
--
--
AC-22B
690 V AC A
100
250
--
--
--
--
--
--
--
AC-23B
690 V AC A
--
--
--
--
--
--
--
--
--
Rated operational current
I
e
for gTr fuses
At AC-22B
400 V AC A
--
--
--
--
--
722
910
2 x 577 2 x 722
Rated operational current
I
e
for isolating blades
At AC-22B
400 V AC A
--
--
--
--
--
1000 1250 2 x 800 2 x 1000
Capacitive switching capacity
kvar
--
105 ...
115
155 ...
185
250 ...300 --
--
--
--
--
Permissible ambient temperature
C -25 ... +55, > 35 °C with derating factors
Mechanical endurance,
operating cycles
1400 1400 800
800
500
800
500
500
500
Electrical endurance,
operating cycles
200
200
200
200
100
100
100
100
100
Degree of protection
With closed fuse carrier,
with terminal cover and peripheral cover
IP30
IP30
IP30
IP30
IP10
IP30
IP30
IP30
IP30
With open fuse carrier
IP10
IP10
IP10
IP10
IP00
IP10
IP10
IP10
IP10
Power loss of the main current paths at
I
th
W 18
23
54
115
190
275
155
350
375
Main conductor connections
Terminal screws
M8
M10
M12
M12
M16
2 ×
M12 2 ×
M12 3 ×
M12 4 ×
M12
Flat bars
mm 20
30
30
30
80
80 x 10 80 x 10 --
--
Cable lug, max. conductor cross-section
(stranded)
mm
2
95
240
240
240
2 × 300 2 × 300 2 × 300 3 × 300
4 x 185
4 × 300
4 x 185
Tightening torque
Nm 12 ... 15 30 ... 35 35 ... 40 35 ... 40 50 ... 60 35 ... 40 35 ... 40 35 ... 40 35 ... 40
Clamp/V terminals
mm
2
1.5 ... 70 25 ... 300 25 ... 300 25 ... 300 --
--
--
--
--
Fixing screws
M8
M12
M12
M12
M16
M12
M12
M12
M12
Required tightening torque for mounting
on busbars
Nm 16 ... 18 35 ... 40 35 ... 40 35 ... 40 50 ... 60 35 ... 40 35 ... 40 35 ... 40 35 ... 40
© Siemens AG 2014