48
738.977 | 1149
EN
Procedure
Start the self-test
1. Press the Self Test button.
The LED flashes, the inverters are disconnected from the
grid, the display shows
StArt
and
tESt
alternately.
Test for undervoltage
2. The display shows the minimum grid voltage setting
(minimum undervoltage) for 2 seconds.
3. When the switch-off limit has reached the actual grid
voltage the display shows
uLo
and the deviation from the
nominal grid voltage alternately. The LED illuminates.
Test for overvoltage
4. Press the Self Test button within 1 minute. The LED
flashes.
5. The display shows the maximum grid voltage setting
(maximum overvoltage) for 2 seconds.
6. When the switch-off limit has reached the actual grid
voltage the display shows
uHi
and the deviation from the
nominal grid voltage alternately. The LED illuminates.
Test for frequency too low
7. Press the Self Test button within 1 minute. The LED
flashes.
8. The display shows the current minimum grid frequency
setting.
9. When the switch-off limit has reached the actual grid fre-
quency the display shows
FLo
and the deviation from the
nominal grid frequency alternately. The LED illuminates.
Test for frequency too high
10. Press the Self Test button within 1 minute. The LED
flashes.
11. The display shows the current maximum grid frequency
setting.
12. When the switch-off limit has reached the actual grid fre-
quency the display shows
FHi
and the deviation from the
nominal grid frequency alternately. The LED illuminates.
End the self-test
13. Press the Self Test button within 1 minute. The LD illumi-
nates, the display shows the following:
–
No error present:
tESt
and
PASS
displayed alter-
nately
–
Error present
tESt
and
FAIL
displayed alternately
14. Press the Self Test button within 1 minute. The self-test
ends and the monitoring unit enters the normal operat-
ing mode.
Содержание StecaGrid Control I1
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