Operation
9.3 RESET after release
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003
119
Setting the RESET function on the 3RB30/3RB31 electronic overload relay
In the case of the 3RB20 / 3RB21 and 3RB30 / 3RB31 electronic overload relays, a slide
switch can be used to choose between automatic and manual reset.
As an alternative to the local reset options, an electrical remote RESET (manual/automatic)
can be implemented on 3RB21 / 3RB31 electronic overload relays by applying a 24 V DC
voltage at terminals A3 and A4, which actuates an internal relay. To ensure that the internal
relay will reliably switch, the voltage needs to be applied for at least 200 ms. During
switching, the relay's current consumption amounts to as much as 200 mA for up to 20 ms,
after which it drops to below 10 mA.
Switching between manual and automatic on 3RB30/3RB31 electronic overload relays
Using a screwdriver, slide the switch to the required position.
Can be found in the Chapter ...
about optional mechanical and electrical RESET
Accessories (Page 123)
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