Siemens 3UG4 User Manual page 369

Restart delay time
If autoreset is activated on the monitoring relay, the restart delay will start as soon as the
measured value to be monitored reenters to the correct range after an overshoot or
undershoot. The associated hysteresis threshold is taken into consideration here. At the end
of this time the contacts switch back to normal operation.
The restart delay time permits motor cooling if the device has tripped due to a temperature
rise.
Possible indications on the display: RsDel
Blocking current monitoring
If the load current overshoots the value of the set threshold for overshoot (I▲) by a multiple of
n during operation, a blocking current error has occurred. The tripping delay time that is
running due to the current threshold overshoot is stopped and the outputs are switched.
Indication on the display: n x I▲
Residual current monitoring
If residual current monitoring has been activated (I >>
load currents at terminals 1/L1 - 2/T1, 3/L2 - 4/T2 und 5/L3 - 6/T3 rises above the
permissible threshold (S00: 1.5 A / S0: 4 A), the ON-delay time onDel, the tripping delay time
Del, and the restart delay time RsDel are stopped and both the CO contact and the
semiconductor output change their switching state immediately (≤ 200 ms).
Indication on the display: I >>
Nominal fault current of the summation current transformer
The 3UL22 summation current transformers differ in size (size of the let-through opening)
and within each size by different nominal currents for which the summation current
transformers are rated.
For the 3UG4624 fault current monitoring relay to be able to indicate the real fault current,
the nominal fault current IΔn of the connected summation current transformer must be set.
Possible indications on the display: IΔn
Phase sequence monitoring
If phase sequence monitoring has been activated and the load currents exhibit the wrong
phase sequence, the CO contact and the semiconductor output will change their switching
status immediately (≤ 200 ms).
Possible indications on the display:
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
= yes
= yes) and the total current of the
Parameters
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