Hybrid Technology - Siemens 340 Manual

3.3

Hybrid technology

The 3RM1 motor starter combines the benefits of semiconductor technology and relay
technology.
This combination is known as hybrid technology. The hybrid technology in the 3RM1 motor
starter is characterized by the following features:
Switching on
The inrush current in the case of motorized loads is conducted briefly via the
semiconductors.
Advantage: The relay contacts are protected. Longer service life is achieved thanks to
reduced wear and tear.
Current conducting
The continuous current is conducted via relay contacts.
Advantage: Relay contacts cause less thermal losses than semiconductors.
Switching off
Switch-off is implemented again via the semiconductor.
Advantage: The contacts are only slightly burdened by arcs. This results in increased service
life.
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002
Description
3.3 Hybrid technology
23