Whether auxiliary switch blocks, surge suppressors, electronically delayed auxiliary switch blocks, directly attachable time relays, mechanical or electrical interlocks: Comprehensive and integrated accessories are provided for all frame sizes. The SIRIUS modular system here shows its strengths to the smallest detail.

For example, on the air-break contactors, the lateral and front auxiliary switches can be consistently used from frame size S0 through to S12.

But also the accessories for the thermal and electronic overload relays are standardized and independent from the frame size. Regarding the handling and storage costs, the standard accessories are a decisive advantage.

http://www.siemens.com/sirius