Protection Against Mains Voltage Dips And Drops - Ducati Energia REGO 5 Manuel D'instruction

When this alarm is triggered:
– the initials "A.L.A." will be displayed in turn with "t.h.d. " and the
measured Crest Factor (these digits will also be separated by ...).
Ex.
– the ALARM LED situated on the front panel of the controller will
light up.
– the alarm relay contact connected to the controller terminal block
will open.
– the number shown by the t.h.d. alarm counter will increase by one.
– the controller will activate the procedure for rapid disconnection
of all steps and go into a standby status (in this status the controller
will not work).
After 30 minutes all these actions will be cleared and the controller
will automatically resume operation (auto-reset status A.r.), though
the incident will continue to be signaled via the display, which will
show "A.L.A." in turn with "t.h.d." and the measured Crest Factor.
To clear the display press ALARM/RESET.
This protection is also active in the manual mode.

13.5 PROTECTION AGAINST MAINS VOLTAGE DIPS AND DROPS

This protection trips in the presence of mains voltage dips lasting
more than two periods (40mS at 50Hz, 33mS at 60Hz). In such cases,
also in the manual mode, the controller will instantly de-energize all
the output relays in order to protect the capacitors. It will then resume
its normal control functions, switching steps into service as necessary
after the time T1 has elapsed.
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