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4. Behavior at power up
Before energizing the switchgear, verify that the REF 542plus
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 REF 542plus 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.
Multifunction Protection and Switchgear Control Unit
Operator's manual
REF 542plusREF 542plus
1MRS755869
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