SIRIUS 3RU2/3RB3 overload relays
5.8 Operation
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
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 Switching between manual and automatic on 3RB30/3RB31 solid-state overload relays
Step Operating instruction Figure
1 Using a screwdriver, slide the switch to the
required position.
MANUAL
AUTO
Reset
Reset
Reference
More information ... Can be found in...
About optional mechanical and electrical RESET
modules
The chapter titled Accessories (Page 523)
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