In-Line Switch-Disconnectors 3Nj62 With Fuses - Siemens Sivacon S8 Planning Information

5.1 In-line switch-disconnectors
3NJ62 with fuses

In-line switch-disconnectors 3NJ62 with fuses

(Fig. 5/2) provide single as well as double breaking as a
standard feature.
Rating data of the vertical 3NJ62 distribution busbar
The vertical distribution busbars with the phase conductors
L1, L2, L3 are arranged at the back of the cubicle. The PE, N
or PEN busbars are arranged in the cable connection com-
partment. In the case of 4-pole feeders, the N conductor is
allocated to the phase conductors L1, L2, L3 at the back of
the cubicle.
The vertical distribution busbar is covered test finger
proofed (IP2X). The rated data are stated in Tab. 5/2.
Rating data of the 3NJ62 cable feeders
Apart from the space requirements for additional built-in
elements (Tab. 5/3), the derating factor stated in Tab. 5/4 is
to be set for determining the permissible operating current
of a fuse link. The space requirements for the cable feeders
of the different in-line units depend on the nominal device
current (Tab. 5/5).
Tab. 5/5: Rating data of the 3NJ62 cable feeders
Nominal device
Type
current
3NJ6203 160 A
3NJ6213 250 A
3NJ6223 400 A
3NJ6233 630 A
1)
Rated current with fuse link = nominal device current
The configuration rules stated in the following are to be observed
Space requirements of the in-line unit (height)
3-pole 4-pole
50 mm 100 mm
100 mm 150 mm
200 mm 250 mm
200 mm 250 mm
Fig. 5/2: Pluggable in-line switch-disconnectors 3NJ62
Tab. 5/2: Rating data of the vertical distribution busbar 3NJ62
Distribution busbar cross section
Rated current at 35 °C ambient
temperature
Rated short-time withstand
current I (1 sec) 1)
cw
1)
Rated conditional short-circuit current I
Tab. 5/3: Additional built-in elements for 3NJ62
Built-in elements Height in mm
1)
50
Blanking cover for
empty slots
100, 200, 300
Device compartment
(mounting
200, 400, 600
plate with
compartment door)
1)
Accessory 3NJ6900-4CB00
Tab. 5/4: Derating factors for 3NJ62 fuse links
Nominal current of fuse link
I < 630 A
n
I ≥ 630 A
n
1)
Rated current
Size
at 35 °C ambient temperature
00 125 A
1 200 A
2 320 A
3 500 A
SIVACON S8 Planning Principles – In-line design, plug-in
2 2
60 x 10 mm 80 x 10 mm
1,560 A 2,100 A
50 kA 50 kA
= 100 kA
cc
Version
Plastic
Metal
Usable overall device
depth 180 mm
Derating factor F
0.8
0.79
1)
1
2
3
4
5
6
7
8
9
10
11
51