SIRIUS 3RR2 current monitoring relays
8.8 Operation
SIRIUS Innovations
722 System Manual, 01/2011, A8E56203870002-03
Blocking current monitoring
Definition of blocking current monitoring (n x Iâ–²)
If the load current overshoots the value of the set threshold value for current overshoot (Iâ–²)
by n times during operation, a blocking current error has occurred. Any delay times which
are running (Del) are aborted and both the CO contact and the semiconductor output change
their switching state.
Setting range
The setting range for blocking current monitoring is No (off) or 2 to 5 x Iâ–². The increment is
1 x Iâ–².
Factory setting
Blocking current monitoring is deactivated by default (No).
Changes to settings
Changes to blocking current monitoring can be made using the arrow keys. Press and hold
down the keys to speed up this process.
Fault current monitoring
Definition of fault current monitoring
If fault current monitoring has been activated (I >> = yes) and the total current of the load
currents at terminals 1L1 / 2T1, 3L2 / 4T2 and 5L3 / 6T3 rises above the permissible
threshold (S00: 1.5 A / S00: 4 A) all delay times which are running (onDel, RsDel, Del) are
aborted and both the CO contact and the semiconductor output change their switching state
immediately (≤ 200 ms).
Factory setting
Fault current monitoring is deactivated by default.
Changes to settings
Fault current monitoring can be activated and deactivated using the arrow keys.
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