SIRIUS 3RT2 contactors/contactor assemblies
2.8 Technical data
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
231
Contact service life of main contacts
Size S0
57
57
57
3
1
N:
$
,
D
,
H
$
N:
57
N:
9
9
9
9
2SHUDWLQJF\FOHV
IRU
&RQWDFWRU
W\SH
5757
bN:bbN:
N:
N:
Legend for formula:
X: Contact service life for mixed operation in
operating cycles
A: Contact service life for normal operation (I
a
= I
e
)
in operating cycles
B: Contact service life for inching (I
a
= multiple of
I
e
) in operating cycles
C: Proportion of inching operations as a
percentage of all operations
Legend for diagram:
P
N
= Rated power of squirrel-cage motors at 400 V
I
a
= Breaking current
I
e
= Rated operational current
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