SIRIUS 3RU2/3RB3 overload relays
5.9 Accessories
SIRIUS Innovations
524 System Manual, 01/2011, A8E56203870002-03
5.9.2 Terminal support for stand-alone assembly
5.9.2.1 Description
Modules for stand-alone assembly
3RU21 thermal overload relays and 3RB30/3RB31 solid-state overload relays can also be
installed individually with the corresponding terminal supports for stand-alone assembly.
The terminal supports for stand-alone assembly are available for both screw-type and
spring-loaded connection systems.
5.9.2.2 Mounting/Disassembly
The terminal supports can be snapped onto 35 mm DIN rails according to DIN EN 50022.
They can also be screw-mounted.
The figure below shows how the terminal support for stand-alone assembly is mounted,
based on the example of a 3RU21 thermal overload relay.
Table 5- 20 Mounting the terminal support (screw-type connection system)
Step Operating instruction Figure
1 Guide the overload relay into the terminal
support from below.
Screw the contacts tight.
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