12
Trip test function
Register 0 also provides access to a trip test
function, which allows the output signals of the
relay module to be activated one by one. If the
auxiliary relay module of the protection assem-
bly is in place, the auxiliary relays then will
operate one by one during the testing.
When pressing the PROGRAM push button
for about five seconds, the green digits to the
right start flashing indicating that the relay
module is in the test position. The indicators of
the settings indicate by flashing which output
signal can be activated. The required output
function is selected by pressing the PROGRAM
push button for about one second.
The indicators of the setting quantities refer to
the following output signals:
Setting I>
Starting of stage I>
Setting t>
Tripping of stage I>
Setting I>>
Starting of stage I>>
Setting t>>
Tripping of stage I>>
etc.
No indication
Self-supervision IRF
The selected starting or tripping is activated by
simultaneous pressing of the push buttons
STEP and PROGRAM. The signal remains
activated as long as the two push butttons are
pressed. The effect on the output relays depends
on the configuration of the output relay matrix
switches.
The self-supervision output is activated by press-
ing the STEP push button 1 second when no
setting indicator is flashing. The IRF output is
activated in about 1 second after pressing of the
STEP push button.
The signals are selected in the order illustrated in
Fig. 4.
REGISTER 0
I> START
I> TRIP
I» START
I» TRIP
Io> START
Io> TRIP
Io»START
Io» TRIP
PROGRAM
5 s
PROGRAM
1 s
PROGRAM
1 s
PROGRAM
1 s
PROGRAM
1 s
PROGRAM
1 s
PROGRAM
1 s
PROGRAM
1 s
PROGRAM
1 s
STEP &
PROGRAM
STEP &
PROGRAM
STEP &
PROGRAM
STEP &
PROGRAM
STEP &
PROGRAM
STEP &
PROGRAM
STEP &
PROGRAM
STEP &
PROGRAM
I»
t»
I>
t>
Io>
to>
Io»
to»
IRF
STEP
PROGRAM
1 s
Fig. 5.Sequence order for the selection of output signals in the Trip test mode
If, for instance, the indicator of the setting t> is
flashing, and the push buttons STEP and PRO-
GRAM are being pressed, the trip signal from
the low-set overcurrent stage is activated. Re-
turn to the main menu is possible at any stage of
the trip test sequence scheme, by pressing the
PROGRAM push button for about five sec-
onds.
Note!
The effect on the output relays then depends on
the configuration of the output relay matrix
switchgroups SGR 1...3.
