Siemens 3UG4 - Operation

3UG4621/3UG4622 current monitoring relays
7.4 Operation
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
179
7.4
Operation
Parameters
Parameterization of the devices is possible locally using the display and the three keys.
Parameter information
The table below shows the settable parameter information of the 3UG4621 and 3UG4622
current monitoring relays:
Table 7- 2 Parmeter information, 3UG4621 and 3UG4622 current monitoring relays with digital setting
Menu
level
Parameters
Setting range
Increment
Factory setting
Minimum value
Maximum value
"RUN" Threshold for undershoot (I▼) 3.0 mA or OFF
1)
0.05 A or OFF
2)
500 mA
1)
10.0 A
2)
0.1 mA
1)
0.01 A
2)
50 mA
1)
1.5 A
2)
"RUN" Threshold for overshoot (I▲) 3.0 mA
1)
0.05 A
2)
500 mA or OFF
1)
10.0 A or OFF
2)
0.1 mA
1)
0.01 A
2)
150 mA
1)
2.5 A
2)
"SET" Hysteresis (Hyst) 0.1 mA
1)
0.01 A
2)
250.0 mA
1)
5.0 A
2)
0.1 mA
1)
0.01 A
2)
10.0 mA
1)
0.5 A
2)
"SET"
ON-delay time (onDel)
0.1 s
20 s
0.1 s
0.1 s
"SET"
Tripping delay time (
)
0.1 s 20 s 0.1 s 0.1 s
"SET"
Reset response (Mem)
no = Autoreset
yes = Hand-RESET
--
no = Autoreset
"SET" Relay switching behavior
(closed-circuit principle NC /
open-circuit principle NO)
NC / U
s
= on or NO / I > 3 mA
1)
NC / U
s
= on or NO / I > 50 mA
2)
-- NC / U
s
= on
1)
3UG4621 current monitoring relay
2)
3UG4622 current monitoring relay
Note
"Overshoot" monitoring mode is
activated when the undershoot threshold is set to OFF.
"Undershoot" monitoring mode is activated when the overshoot threshold is set to OFF.
Note
Deactivating monitoring
If the upper and lower threshold values are deactivated (OFF), monitoring will
cease for:
•
Current overshoot
•
Current undershoot
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)".