ABB REC 561 User Manual page 277

1MRK 580 153-XEN
Page 5 - 98
Loss of power system voltage
The LOV--TRIP output signal should be configured to the corre-
sponding binary output (relay contact) under the submenu
Configuration
Slotnn-ZZZy
Where nn is the corresponding number of the I/O module, and y is
the number of the output on the module. ZZZ indicates the type of
I/O modulethat is installed in the terminal. Connect the indication
instrument to the relevant output terminals.
1.3 Set the operation of the fuse failure function to off mode under the
sub menu:
Settings
Functions
Group n
FuseFailure
1.4 Simultaneously increase the measured three-phase voltages for at
least 10 seconds to their rated value and consider the correct phase
relations between them. The LOV--TRIP signal should not appear
on the output terminal after a time period longer than seven sec-
onds.
1.5 Simultaneously disconnect the voltage in all three phases and note
the LOV--TRIP signal. It should appear approximately seven sec-
onds after the voltage has been switched off. Its duration should be
about 150 ms.
1.6 Simultaneously increase the measured voltages to their rated values
and decrease them again to zero within an interval shorter than
threeseconds. No LOV--TRIP signal should appear.
1.7 Increase the measured voltages to their rated values for at least 10
seconds. Disconnect one phase and, after a time longer than 10 sec-
onds, also the remaining two phases. No LOV--TRIP signal should
appear after a time period longer than seven seconds.
1.8 Increase the measured voltages to their rated values for at least 10
seconds. Connect a nominal DC voltage to the binary input LOV--
BC. Simultaneously disconnect all three voltages from the terminal.
No LOV--TRIP signal should appear after a time period longer than
seven seconds.
1.9 Disconnect the DC voltage from the LOV--BC binary input.
1.10 Set the operation of the fuse-failure supervision function (if built
into the terminal) to On mode. Increase the measured voltages and
all three phase currents to their rated values for at least 10 seconds.
Disconnect the voltage in one phase and about a half a second later,
also in the remaining two phases. No LOV--TRIP signal should
appear.
ABB Network Partner AB
Version 1.0-00