SIRIUS 3RR2 current monitoring relays
8.8 Operation
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
711
8.8.2 3RR22 Standard digital setting current monitoring relay
8.8.2.1 Parameters
Display information
The 3RR22 has two menus, "RUN" and "SET", which feature the following parameters:
"RUN" menu
The RUN menu shows the up-to-date current measured value. You can use the arrow keys
to switch between the current values of the individual phases. Furthermore, two symbols
representing the relay and the semiconductor output Q indicate whether delay times are
running and when the relay contacts are open or closed. The selected type of monitoring
(current monitoring for overshoot or undershoot and range monitoring) is also displayed.
In the event of faults or errors, the display also facilitates troubleshooting.
It is even possible to set threshold values for current overshoot and undershoot in this menu.
Press the SET button (< 0.5 s) to choose between the following parameters:
● Threshold value for current undershoot for the CO contact 31-32-34 (I▼)
See the chapter titled Lower threshold value (Page 716)
● Threshold value for current
undershoot for the semiconductor output Q (I!▼)
See the chapter titled Lower threshold value (Page 716)
● Thres
h
old value for current overshoot for the CO contact 31-32-34 (I▲)
See the chapter titled Upper threshold value (Page 717)
● Thresh
old value for current overshoot for the semiconductor output Q (I!▲)
See the chapter titled Upper threshold value (Page 717)
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