REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-151
Settings:
Z - Setting =´´07.x
U
I
K
K
I
U
T
TN
TN
i
u
N
N
Z - Setting =´ ´ ´ =07 01
12
48
1000
120
5
100
0073..
.
.
It must not be forgotten that a current of at least 0.1 I
N
must flow
before the underimpedance function is enabled.
Typical settings:
Z-Setting 0.07
Delay 0.5 s
Z-Setting
+0.07
-0.07
0
HEST 935 003 C
x
z
r
j
Fig. 3.5.13.3 Operating characteristic of the underimpedance
function
Setting: Z-Setting = 0.07
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