Technical data
8.8 Electrical service life of contactor
M200D PROFIBUS/PROFINET
184
Manual, 08/2014, A5E01577426A/RS-AA/004
If mixed operation is available, i.e. if normal switching operation (breaking of rated operating
current in accordance with utilization category AC-3) is mixed with occasional inching
(breaking of the multiple rated operating current in accordance with utilzation category AC-
4), the service life of the contacts can be calculated approximately with the following 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 in the total operations as a percentage
P
N
Rated power of three-phase motors at 400 V
I
a
Breaking current
I
e
Rated operating current
Figure 8-2
Service life of main contacts for contactor 3RT1017
Summary of Contents for SIRIUS M200D
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Page 90: ...Functions 3 22 Logbook M200D PROFIBUS PROFINET 90 Manual 08 2014 A5E01577426A RS AA 004 ...
Page 222: ...Appendix A 2 Order numbers M200D PROFIBUS PROFINET 222 Manual 08 2014 A5E01577426A RS AA 004 ...
Page 224: ...Correction sheet M200D PROFIBUS PROFINET 224 Manual 08 2014 A5E01577426A RS AA 004 ...
Page 232: ...Index M200D PROFIBUS PROFINET 232 Manual 08 2014 A5E01577426A RS AA 004 ...
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