210
Technical Handbook
Type:
Warning
Related parameters:
P.9641
Nominal voltage (DC).
P.9741
Loads voltage hysteresis.
P.9744
Low loads voltage threshold.
P.9745
Low loads voltage delay.
To disable:
P.9745 = 0
Enabled in:
MAN, AUTO, TEST, REMOTE START
Override:
-
This protection works on the DC voltage of the common bar. Its purpose is to protect the loads
from low voltages. Since
there isn’t a DC measure for the common bar, the protection works
with the loads DC voltage if LCB is closed. If LCB is opened, the protection is disabled. It is
activated if the measure of the voltage remains continuously below to threshold P.9744
(percentage of the rated voltage P.9641) for time P.9745.
Type:
Warning
Related parameters:
P.9641
Nominal voltage (DC).
P.9741
Loads voltage hysteresis.
P.9746
High loads voltage threshold.
P.9747
High loads voltage threshold.
To disable:
P.9747 = 0
Enabled in:
MAN, AUTO, TEST, REMOTE START
Override:
-
This protection works on the DC voltage of the common bar. Since a high voltage can be
caused only by the generator or by the auxiliary source, the purpose of this protection is to
force the opening of both ACB and BCB in case of high voltage (leaving the loads supplied by
the pla
nt battery). Since there isn’t a DC measure for the common bar, the protection works
with the loads DC voltage if LCB is closed.
If LCB is opened, and both generator and auxiliary source are generating currents, the
protection uses another voltage, evaluated in the following order:
•
Plant battery DC voltage if BCB is closed.
•
Generator DC voltage if GCB is closed and the engine is running.
•
Auxiliary source DC voltage.
This protection is activated if the measure of the voltage remains continuously above to
threshold P.9746 (percentage of the rated voltage P.9641) for time P.9747.
Type:
Latched warning
Related parameters:
P.9641
Nominal voltage (DC).
P.9741
Loads voltage hysteresis.
P.9748
Max loads voltage threshold.
P.9749
Max loads voltage delay.
To disable:
P.9749 = 0
Enabled in:
MAN, AUTO, TEST, REMOTE START
Override:
-
This protection works on the DC voltage of the common bar. Since a high voltage can be
caused only by the generator or by the auxiliary source, the purpose of this protection is to
force the opening of both ACB and BCB in case of high voltage (leaving the loads supplied by
Содержание HS 315
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