Siemens SIRIUS 3RT - Operating Mechanism System; Coil Selection 3 RT1 Contactors

Configuration
6.3 Operating mechanism system / coil selection 3RT contactors and 3RH2 contactor relays
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
70 Manual, 09/2017, A5E03656507120A/RS-AE/006
6.3.2
Operating mechanism system / coil selection 3RT1 contactors
Two operating mechanism types are available for the standard versions of 3RT1 contactors
in the sizes S6 to S12:
● Conventional operating mechanism
● Solid-state operating mechanism
Other operating mechanism types are available for special applications in addition to the
operating mechanisms for standard contactors:
● Solid-state operating mechanism for contactors with remaining lifetime signal RLT
● Solid-state operating mechanism for contactors with extended operating range and rail
applications
● Solid-state operating mechanism for contactors with fail-safe control input
The conventional and the solid-state operating mechanism can be operated with AC (50 to
60 Hz) as well as with DC.
To attenuate the switching overvoltage the contactors have an integral coil circuit with
varistor. To the extent that especially fault-prone applications make further attenuation
measures necessary, RC elements (accessories) can be additionally attached.
Note
No ad
ditional RC elements can be mounted on the solid-state operating mechanisms for
standard contactors with remaining lifetime signal
RLT.