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Busbar system
Selection data
2010 CA08103002Z-EN
www.eaton.comSASY
16/41
SelectiondataSASY
Reduction of rated operating current
Reduction of the rated operational current (derating) under particular ambient
conditions (according to IEC 947)
Device part no.
Release type Derating coefficient
20 °C 30 °C
40 °C 50 °C 60 °C 65 °C
70 °C
Device adapter for circuit-breakers and switch-disconnectors
(reference temperature 40 °C)
NZM…3-630…+NZM3-XAD630
with XAD… 1
0.96
0.92
0.88
0.84
0.82
0.8
Notes
To determine the maximum permissible current load at different ambient temperatures, refer to the derating coefficients shown in the table.
Example: An NZM…3-…630… with a component adapter is to be used at an ambient temperature of 50 °C.
What is the highest permissible rated operating current Ie?
At 50 °C the derating coefficient is 0.88, which means that Ie = 630 A x 0.88 = 554.40 A.
The NZM…3-…630… can therefore be used at an ambient temperature of 50 °C with a maximum Ie = 554.40 A.
Possible combinations without bending the flat busbars
Device
GST00-160-40-60-
AOU
LTS-100/C00/3-R D02-S/63/3-RS D02-LTS/63/3-
R(-HK)
D02-SO/63/3-R-27
Z-D02/R/3-…
DII-SO/25/3-
R…
DIII-SO/63/3-
R(-PS)
Accessories BS-SET-GST00
-
-
-
-
SBS-RS60
SBS-RS60
CU 12 x 5/10
-
-
-
x
x
x
x
20 x 5/10
x
x
x
x
x
x
x
25 x 5/10
x
-
-
x
x
x
x
30 x 5/10
x
x
x
x
x
x
x
Double T
x
x
x
x
x
x
x
Width mm 106
63
36
27
27
36 - 54
45
54
NZM, GST, LTS, D02, DII, DIII