SIRIUS 3RF34 solid-state switching devices
3.2 Product description
SIRIUS Innovations
316 System Manual, 01/2011, A8E56203870002-03
3.2 Product description
3.2.1 Device versions
Solid-state switching devices are primarily used in single-phase applications which have to
meet the following requirements:
● Very high switching frequencies (> 1,000 switching operations per hour)
● Resistive loads
The SIRIUS modular system features single- and three-phase solid-state contactors and
solid-state relays for the frequent switching of resistive loads. Three-phase solid-state
contactors and solid-state reversing contactors are available for switching motorized loads.
Standardized function modules for various applications complete the range of SIRIUS solid-
state switching devices.
The solid-state contactor and solid-state reversing contactor versions listed in this manual
are intended specifically for operation on three-phase motors up to 7.5 kW.
You can find more detailed information in the appendix More information (Page 758).
Overview
These 2-phase controlled instantaneous switching solid-state switching devices are operated
in two mounting widths in an insulating enclosure:
● In 45 mm width
– Up to 5.2 A as solid-state contactor (motor contactor) or
– Up to 5.4 A as solid-state reversing contactor and
● In 90 mm width
– Up to 16 A as solid-state contactor or
– Up to 7.4 A as solid-state reversing contactor
This means that it is possible to operate motors up to 7.5 kW.
The solid-state contactors and solid-state reversing contactors can be connected directly to a
motor starter protector with a 3RA2921-1BA00 link module. Direct mounting of a
3RB30/3RB31 solid-state overload relay and, in some cases, a 3RR2 current monitoring
relay, is also possible. This provides a time-saving way of implementing rapid-switching
motor feeders with and without fuses.
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