Operation - Siemens 3UG4 User Manual

3RR2 current monitoring relays
4.4 3RR21 current monitoring relays
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
ON-delay time (onDel)
Tripping delay time (Del)
Threshold for current overshoot
(I▲)
Threshold for current undershoot
(I▼)
Reset response (Memory)
current monitoring relay 3RR2141-.A.30
1)
current monitoring relay 3RR2142-.A.30
2)
current monitoring relay 3RR2143-.A.30
3)
a stored fault condition can be reset by briefly switching to Memory = 0 or by switching off
4)
the supply voltage.
The position digits refer to the front view in the Chapter "Operator controls and connection
5)
terminals (Page 53)."
Hysteresis
The hysteresis is set to a fixed value of 6.25% of the set threshold.
56
Control Setting range
element
5)
Minimum value
9 0 s
10 0 s
2 1.6 A or OFF
4 A or OFF
2)
8 A or OFF
3)
3 1.6 A or OFF
4 A or OFF
2)
8 A or OFF )
3
4 0 = automatic rest
Maximum value
60 s
30 s
16 A
1) 1)
40 A
2)
80 A
3)
16 A
1) 1)
40 A
2)
80 A )
3
1 = manual reset
Manual, 05/2016, NEB927043002000/RS-AC/004
Increment Factory
setting
Continuous 0 s
Continuous 0 s
Continuous 8 A
1)
20 A
2)
40 A
3)
Continuous Disabled
-- Automatic
4)
reset
3UG4 / 3RR2 monitoring relays