2025年1月1日 · Siemens Industry Catalog - Automation technology - Industrial controls - Protection equipment - Overload relays - SIRIUS 3RU2 thermal overload relays

2019年3月15日 · for thermal overload relays). •Minimizes temperature rises of the con-tactor and control cabinet – in some cases this may eliminate the need for control-gear cabinet cooling. •Direct mounting to contactor saves space, even for high motor currents (i.e. no heat decoupling is required). Internalpower supply

2024年8月12日 · Equipment Manual - SIRIUS 3RU thermal overload relays / 3RB electronic overload relays

Reliable 3UA/UC thermal overload relays provide optimum motor protection across industries with adjustable settings for Class 10A and Class 30 applications.

Overload Relays Siemens · 2011 5 General data 1) The SIRIUS 3RU11 thermal overload relays use a bimetal contactor and therefore do not require a control supply voltage. Features Benefits 3RU11 3RB20/3RB21 3RB22/3RB23 Other features Internal power supply † Eliminates the need for configuration and connec-ting an additional control circuit--1) --

3RU21 thermal overload relays have been designed to provide current-dependent protection for loads with normal starting against impermissibly high temperature rises due to overload, phase asymmetry or phase failure. 3RB30 / 3RB31 solid-state overload relays with internal power supply have been designed to

Equipment Manual - SIRIUS 3RU thermal overload relays / 3RB electronic overload relays