Setting - ABB REC 561 User Manual

1MRK 580 153-XEN
Page 5 - 96
TEST
TEST-ACTIVE
Block LOV=Yes
LOV--VTSU
UCHL1 <
UCHL2 <
UCHL3 <
LOV--BC

4 Setting

Loss of power system voltage
&
1
&
1
&
Fig. 1 Loss-of power-system voltage- simplified logic diagram
The set value of the operating level for the loss-of power-system voltage
function is the same as for the undervoltage protection function, inde-
pendent of whether the function is built in the terminal as an option. The
setting of the operating value occurs under the sub menu:
Settings
Functions
The voltage criteria for the loss-of-voltage supervision function must be
set lower than the minimum, expected-system operating voltage. It is sug-
gested to consider an additional 10% safety margin during the setting cal-
culations.
3s
1
t
10s
t
&
150ms
7s
t
t
Group n
UnderVoltage
ABB Network Partner AB
Version 1.0-00
&
1
LOV--TRIP
(X80153-1)