Line Contactors - Siemens SINAMICS S120 Equipment Manual

Cabinet Configuration and EMC Booksize
6.2 Selection of devices required for operation of SINAMICS
6.2.4

Line contactors

Line contactors are required for electrical isolation of the drive line-up from the power supply
network.
For selection of the line contactor, the characteristic values in the technical specifications
apply. The cable routing, the bundling factor, and the factor for the ambient temperature
according to EN 60204-1 must be taken into account in rating the conductors to be
connected.
Caution
Line contactors must not be switched under load.
When the digital output is used to control the line contactor, the make/break capacity must
be taken into account.
You are advised to connect overvoltage limiters to the contactor coils to limit the opening
overvoltage. See catalog D21.2.
6-6
Equipment Manual, (GH2), 04.2004 Edition, 6SL3097-2AC00-0BP0
Booksize Power Sections