Siemens SIRIUS 3RU2 - Mounting;Disassembly

Mounting
7.3 Mounting/Disassembly
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
60 Manual, 09/2014, A5E03656507420A/RS-AA/002
Mounting position for 3RB30/3RB31 solid-state overload relay
The following diagram shows the permissible mounting position for contactor mounting
for 3RB30/3RB31 solid-state overload relays.
Table 7- 2 Permissible mounting positions for 3RB30/3RB31
Overload relay, stand-alone assembly
Contactor + overload relay
3RB30/3RB31 solid-state overload relays can be mounted in
any position in stand-alone assembly.
7.3
Mounting/Disassembly
Direct mounting on 3RT contactor
The diagram below shows an example mounting scenario based on mounting the
3RU21 thermal overload relay, size S0, on the 3RT2 contactor. The contactor/overload relay
combinations can be snapped onto 35 mm DIN rails according to EN 60715.
Table 7- 3 Mounting the 3RU21 overload relay with a screw-type connection system
Step
Instructions
Figure
1 Push the overload relay into the contactor
from below. Attach the two hooks on the
overload relay to the two openings on the rear
of the contactor. This pushes the main current
contacts into the corresponding socket
contacts on the contactor.
2 Screw the contacts tight.
Check that the cable is clamped tight.