147 / 158
7
Switch Disconnectors
3NP5 Fuse Switch Disconnectors up to 630 A
Fuses
7/147
Siemens LV 10 · 2014
1)
Due to the mechanical stress on the relatively long fuse blades,
SITOR 3NE41 semiconductor fuses should only be switched occasionally
and only at zero current.
2)
3NP1 fuse switch disconnectors may be operated at up to 1000 V AC/DC
with the following restrictions:
- Degree of pollution 2 (instead of 3)
- AC20 or DC20 - i.e. switching only without load
3)
In the case of cyclic loads, the currents may have to be further reduced
(precise values on request).
4)
The fuse can also be operated at a higher rated uninterrupted current than
the 630 A current of the 3NP54. However, in this case, the 3NP54 must not
be switched under load (utilization category AC-20).
3NE4334-0B 500
800
aR
2 2x (30x5)
3NP54
3 450
--
--
--
3NE4337
710
800
aR
2 2x (50x5)
3NP54
3 600
--
--
--
3NE8015-1
25
690
gR
00 4
3NP50
00 25
--
--
--
3NE8003-1
35
690
gR
00 6
3NP50
00 33
--
--
--
3NE8017-1
50
690
gR
00 10
3NP50
00 45
--
--
--
3NE8018-1
63
690
gR
00 16
3NP50
00 54
--
--
--
3NE8020-1
80
690
aR
00 25
3NP50
00 68
--
--
--
3NE8021-1
100
690
aR
00 35
3NP50
00 89
--
--
--
3NE8022-1
125
690
aR
00 50
3NP50
00 106
--
--
--
3NE8024-1
160
690
aR
00 70
3NP50
00 130
--
--
--
SITOR semiconductor fuse data
Permissible load currents of fuse when installed in
3NP5 for floor mounting
Type 3NP5
Alternative type 3NP5
Type
1)
Rated
current
I
n
Rated
voltage
2)
Opera-
tional
class
Size Required con-
ductor cross-
section Cu
Type
Size Permissible
load
current
3)
Type
Size Permissible
load
current
3)
A
V AC
mm²
A
A
© Siemens AG 2014