User Manual
3UG4624 residual current monitoring relay
8.3 Functions
3UG4 / 3RR2 monitoring relays
176 Manual, 02/2013, NEB927043002000/RS-AA/002
Display Memory = yes
Relay switching behavior = NC (closed-circuit
principle)
Memory = yes
Relay switching behavior = NO (open-circuit principle)
Iā² / I!ā²
Mem =
yes
Hyst
Hyst = 5%
11/14
11/12
J=0
J > I!
21/24
21/22
onDel
Lx-Ly/N
Reset
t > 2 s
J < I
,
,ī
I
Del
Hyst
Hyst = 5%
11/14
11/12
J=0
J > I!
21/24
21/22
onDel
Lx-Ly/N
Reset
t > 2 s
J < I
,
,ī
I
Del
J = Currently measured current value
I = set threshold value for the current
Note
The neutral conductor must no longer be grounded after the summation current transformer
because otherwise the residual current monitoring function cannot be ensured.