Siemens 3UG4 User Manual page 373

Stabilization delay
An output is only switched to the "correct position" after switching on the supply voltage if all
monitored measured values are stable for the duration of the stabilization delay. The
monitoring functions are active within the stabilization delay. A threshold overshoot or
undershoot in this time does not result in a fault, but instead in restarting of the stabilization
delay.
The stabilization delay starts in the following cases:
● At Power-ON
Reapplication of the supply voltage (Power-ON) of the device after
disconnection of the current flow (zero current).
● At manual reset
A fault is acknowledged by a manual reset. After this, the device responds in the same
way as
when the supply voltage is connected.
Starting the stabilization delay via IO-Link
The stabilization time can also be started through the process image of the outputs (PIQ) by
setting the control command "Start stabilization time."
The "Stabilization time" parameter is set either locally using the three keys on the device, or
via IO-Link. The requirements governing the starting of the stabilization delay (Power-ON
and/or manual reset) can only be modified via IO-Link.
The stabilization of line voltage is useful, for example, in the case of generator operation.
Note
Whenever the menu level is exited SET, the stabilization time starts again.
Indication on the display: stDel
Phase failure monitoring
If the "phase failure monitoring" parameter is activated, an immediate shutdown is carried
out in the event of a failure of one of the phases (or of the N conductor) to protect the
application from follow-on damage.
Set delay times have no effect on phase failure monitoring.
The "phase failure monitoring" parameter on the 3UG48 monitoring relays is set either locally
via the three keys on the device, or via IO-Link.
Possible indications on the display:
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
Parameters
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