Siemens SIRIUS 3UG4 User Manual

4.4.3 Operation
Parameters
The following parameters can be set on the relevant rotary button using a screwdriver:
Table 4-7 Parameter information, 3RR21 current monitoring relays with analog setting
Parameters Control
element
5)
Setting range Increment Factory set‐
ting
Minimum value Maximum value
ON-delay time (onDel) 9 0 s 60 s Continuous 0 s
Tripping delay time (Del) 10 0 s 30 s Continuous 0 s
Threshold for current overshoot (I▲) 2 1.6 A or OFF
1)
4 A or OFF
2)
8 A or OFF
3)
16 A
1)
40 A
2)
80 A
3)
Continuous 8 A
1)
20 A
2)
40 A
3)
Threshold for current undershoot(I▼) 3 1.6 A or OFF
1)
4 A or OFF
2)
8 A or OFF
3
)
16 A
1)
40 A
2)
80 A
3
)
Continuous Disabled
Reset response (Memory) 4 0 = automatic rest 1 = manual reset
4)
-- Automatic re‐
set
1)
current monitoring relay 3RR2141‑.A.30
2)
current monitoring relay 3RR2142‑.A.30
3)
current monitoring relay 3RR2143‑.A.30
4)
a stored fault condition can be reset by brie󹪞y switching to Memory = 0 or by switching o󹪜 the
supply voltage.
5)
The position digits refer to the front view in the Chapter "Operator controls and connection
terminals (Page 55)."
Hysteresis
The hysteresis is set to a 󹪝xed value of 6.25% of the set threshold.
Changes to settings of threshold for current overshoot (I▲) and threshold for current undershoot
(I▼)
Note
Deactivating monitoring
If both threshold values are deactivated (OFF), the following will no longer be monitored:
• Current overshoot
• Current undershoot
The following parameters continue to be monitored:
• Phase failure
3RR2 current monitoring relays
4.4 3RR21 current monitoring relays
SIRIUS 3UG4 / 3RR2 monitoring relay
58 Equipment Manual, 07/2021, NEB927043002000/RS-AD/005

Siemens SIRIUS 3UG4 Specifications

General

Brand	Siemens
Model	SIRIUS 3UG4
Category	Relays
Language	English