Siemens SIRIUS 3RT - Contact Service Life of Auxiliary and Main Contacts (Size S2)

Configuration
6.16 Contact service life of auxiliary and main contacts
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
169
6.16.1.2
Contact service life of auxiliary and main contacts (size S2)
Contact service life of auxiliary contacts
This requires operating mechanisms that switch at
random, i.e. not synchronized with the phase angle of the
supply system.
The contact service life is essentially dependent on the
breaking current.
The characteristic curves apply to:
• Integrated auxiliary contacts on 3RT20
• Auxiliary switch blocks 3RH2911-., 3RH2921-. for
contactors size S2.
Legend for diagram:
I
a
= Breaking current
I
e
= Rated operational current
1)
Integrated auxiliary contacts and contacts in the auxiliary switch blocks for contactors (size S2): 6 A
2)
Contacts in auxiliary switch blocks for contactors size S2: 6 A