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9.3
RESET after release
Manual and automatic reset
If manual reset is selected, resetting can be carried out directly on the device by pressing the
RESET button.
A remote reset (remote RESET) is possible in conjunction with the mechanical and electrical
RESET modules, which are available as accessories. If automatic RESET is set on the
overload relay, the relay will be reset automatically.
WARNING
Automatic machine restart!
Can result in death, serious injury, or property damage.
If a switch-on command is present after an overload trip and a manual reset or automatic
reset is performed, the machine will start up immediately. People may be injured if they stay
in the danger area of the machine.
Make sure that the motor does not start up again following an overload trip until a new
switch-on command has been issued (e.g. via an additional ON button) and that no one is
in the machine danger zone at the time of restarting.
Recovery time following overload release
This time gives the load a chance to cool down.
● 3RU21 thermal overload relays
The device cannot be reset until the bimetal strips have cooled down. The recovery time
is dependent upon the tripping characteristic curve and the extent of the tripping current.
● 3RB30/3RB31 solid-state overload relays
In the case of the 3RB30/3RB31 solid-state overload relays, the recovery time is stored
as a fixed value and is 3 minutes following a current-dependent release with automatic
RESET selected.
Following a trip, the 3RB30/3RB31 overload relays can be immediately reset locally on
the device.
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
Manual, 09/2014, A5E03656507420A/RS-AA/002
Operation
9.3 RESET after release
77
- Quick Links:
- 3Ru21 Thermal Overload Relays
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