ABB REG316 4 Series Operating Instructions Manual page 189

REG 316*4 1MRB520049-Uen / Rev. F
Settings:
U
Z - Setting =
0 7 . x
T
Z - Setting = ´
0 7 0 1 .
It must not be forgotten that a current of at least 0.1 I
before the underimpedance function is enabled.
Typical settings:
Z-Setting
Delay
+0.07
-0.07
Fig. 3.5.13.3 Operating characteristic of the underimpedance
function
Setting: Z-Setting = 0.07
K I
TN i N
´ ´
I K U
TN u N
12 1000 5
´ ´
.
4 8 . 120 100
0.07
0.5 s
x
j
0
Z-Setting
ABB Switzerland Ltd
=
0 073 .
must flow
N
z
r
HEST 935 003 C
3-151