Siemens 3UG4 - Page 76

3RR2 current monitoring relays
4.5 3RR22 current monitoring relays
3UG4 / 3RR2 monitoring relays
76 Manual, 05/2016, NEB927043002000/RS-AC/004
Menu
level
Parameters
Setting range
Increment
Factory setting
Minimum value
Maximum value
"SET" Reset response (Mem) no = Autoreset yes = Hand-
RESET
-- no = Autoreset
"SET"
Phase sequence monitoring ( )
no or yes
--
no
"SET" Load current monitoring (apparent
current I
s
/active current I
p
)
I
s
or I
p
-- I
s
"SET" Relay switching behavior (closed-circuit
principle NC / open-circuit principle NO)
NC or NO -- NC
1)
3RR2241 current monitoring relay
2)
3RR2242 current monitoring relay
3)
3RR2243 current monitoring relay
Note
The "current overshoot" or "current undershoot" monitoring
mode is defined with the setting
OFF for the upper and lower threshold.
Note
Deactivating monitoring
If the upper and lower threshold values are deactivated (OFF), monitoring will cease for:
•
Current overshoot
•
Current undershoot
•
Blocking current
The
following parameters continue to be monitored:
•
Fault current (if activated)
•
Incorrect phase sequence (if activated)
•
Phase failure
The up-to-date measured value is displayed permanently.
The parameters are described in the Chapter "Parameters (Page 363)".
Menu-based operation is described in the Chapter "Menu-based operation (Page 39)".