3NJ62 Switch Disconnectors with Fuses

2
3NJ62 Switch Disconnectors with Fuses
General data
Assignment of blanking covers with 50 mm high ventilation slots
Group Single device
Size 00 Size 1 Size 2 Size 3
Summation current
of group ≤500 A
I N = 80 A
I N = 125 A
I N = 125 A
I N = 160 A
2/24
Permissible
continuous load
current ≤400 A
Summation
current of group
490 A x 0.8 =
392 A
2 blanking
covers/group
Group Permissible
continuous load
current of single
device ≤64 A
Siemens LV 37 · 04/2008
Summation current
of group = 500 A
I N = 250 A
I N = 250 A
Permissible
continuous load
current ≤40 A
Summation
current of group
500 A x 0.8 =
400 A
2 blanking
covers/group
e. g.
Group Example:
Size 00 Sizes 00 and 1 Group
size 00 and sizes 2
and 3
Size 00 with
I N ≤ 80 A
I N = 20 A
I N = 32 A
I N = 32 A
I N = 40 A
I N = 40 A
I N = 50 A
I N = 50 A
I N = 80 A
I N = 80 A
I N = 80 A
I N = 80 A
I N = 80 A
Any group size,
up to 33 in-line
disconnectors/
panel
16 A
26 A
26 A
32 A
32 A
40 A
40 A
64 A
64 A
64 A
64 A
64 A
2 blanking
covers/group
I N = 40 A
I N = 100 A
I N = 100 A
I N = 250 A
Summation
current of group
490 A x 0.8 =
392 A
2 blanking
covers/group
© Siemens AG 2008
I N = 20 A
I N = 32 A
I N = 32 A
I N = 40 A
I N = 40 A
I N = 50 A
I N = 50 A
I N = 80 A
I N = 80 A
I N = 80 A
I N = 80 A
I N = 80 A
Size 2
I N = 400 A
Size 3
I N = 630 A
Permissible
continuous load
current of single
device ≤320 A
0,8 x I N = 280 A
1 blanking
cover/device
e. g.
I N = 630 A
Permissible
continuous load
current of single
device ≤440 A
0,8 x I N = 400 A
3 blanking
covers/device
440 A >I≤500 A
= 500 A
4 blanking
covers/device
When combining size 00 with I N 80 A with other sizes, in
the case of sizes 2 to 3, the rated currents must be
reduced to 0.7 x I N :
Please observe assignment of blanking
covers for devices of sizes 1 to 3
(see adjacent example of a panel not
fully equipped)!
Rated current:
280 A
Rated current:
440 A