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4. Behavior at power up
Before energizing the switchgear, verify that the REF542plus
protection functions are properly set and that the unit is properly
working (READY LED green).
At power up, the HMI unit shows on the LCD for a few seconds the
following:
A051339
Fig. 4.-1 REF542plus LCD during power up
After that, the LCD left part shows the switchgear single diagram while the
right part shows the default menu. When the initialization is completed and
the unit is operational, the ready LED is on.
1MRS755869
Multifunction Protection and Switchgear Control
Unit
Operator's manual
REF542plus
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