Siemens SIRIUS 3RT Series System Manual page 519

Setting the RESET function on the 3RB30/3RB31 solid-state overload relay
In the case of the 3RB30/3RB31 solid-state overload relays, a slide switch can be used to
choose between automatic and manual reset.
As an alternative to the reset options, an electrical remote RESET (manual/automatic) can
be implemented on 3RB31 solid-state overload relays by applying a 24 V DC voltage at
terminals A3 and A4. When a voltage of 24 V is applied at terminals A3/A4 of the 3RB31, a
current flows for approx. 20 ms which can be 200 mA for a short time. After the 20 ms, the
current drops to less than 10 mA. The voltage needs to be applied for at least 200 ms.
Table 5- 19
Step
1
Reference
More information ...
About optional mechanical and electrical RESET
modules
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
Switching between manual and automatic on 3RB30/3RB31 solid-state overload relays
Operating instruction
Using a screwdriver, slide the switch to the
required position.
SIRIUS 3RU2/3RB3 overload relays
Figure
Can be found in...
The chapter titled Accessories (Page 523)
5.8 Operation
AUTO
Reset
MANUAL
Reset
519