SIRIUS 3RR2 current monitoring relays
8.8 Operation
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
719
ON-delay time
Definition of ON-delay time (onDel)
This is where the delay time until the start of monitoring following the start of current flow is
set.
Explanation
The set ON-delay time starts when current flow commences (S00: I > 1.1 A/S0: I > 3.0 A).
During this time, undershooting or overshooting of the set threshold values or a blocking
current error will not cause the CO contact and the semiconductor output to respond. Once
this time has elapsed, if the current value is not in the correct range, the CO contact and the
semiconductor output will change the switching state in accordance with the selected circuit
principle.
Note
Special cases wire break/phase failure (incorrect phase sequence/fault current)
When a wire break or phase failure is detected, as well as in the event of incorrect phase
sequence and fault current (if these have been activated), a delay time is not observed. The
current monitoring relay responds immediately (≤ 200 ms) in such cases.
Setting range
The setting range for the ON-delay time is 0 s to 99 s. The increment is 1 s.
Factory setting
The ON-delay time is factory-set to 0 s.
Changes to settings
Changes to the ON-delay time can be made using the arrow keys. Press and hold down the
keys to speed up this process.
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