Sices D-PRO, Technical Manual

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D-PRO Protection relay Technical Manual 31
This term defines capacity of D-PRO of temporarily disabling (in particular conditions and on
specific request) a series of protections. The OVERRIDE function, when it is activated, turns
a set of alarms into simple “warnings”: in this way, the controller indicates the presence of
problems anyway, but it doesn’t reduce the supplying capacity of the genset.
D-PRO manages one only OVERRIDE request of the protections; all of them can be activated
through digital inputs. Use the following function to configure the digital inputs:
•
DIF.2063
(“Protections Override”).
7.6
D-PRO manages a maximum of eight digital inputs. Every input can be used to activate
anomalies. These faults can be configured with the functions from DIF.4001 to DIF.4004. For
these faults, the operator must configure the message (useful during the programming through
BoardPrg3) and the time.
The faults will be described in the following paragraphs: in the description, we will always refer
to the parameters related to the digital input #1 of D-PRO (P.2001, P.2002 and P.2003). The
document [1] contains a table that shows the parameters to use for each D-PRO digital input.
D-PRO assigns numeric codes from 701 to 742 to generic faults related to analogue inputs
(the document [1] contains a table that shows the code of each input). By using the parameter
that configures the function (P.2001), it is possible to select the type of fault (warning or alarm)
and also to define how to manage the fault.
Warning: by setting the delay to “0”, the anomaly
is disabled.
7.7
From this point on, the words enabling and activation will be used as follows:
•
Enabling a fault refers to the minimum conditions required for the controller to detect
the related cause.
•
Activation of an anomaly refers to the cause after enabling.
Type: Warning
Related parameters: P.0391 Second threshold for low battery voltage (%)
P.0392 Delay for low battery voltage second threshold
To disable: P.0392=0
The protection is always enabled.
It activates if the battery voltage is continuously lower than the threshold P.0391 for time
P.0392. The threshold is expressed as a percentage of the rated battery voltage, which cannot
be configured but it is automatically selected by the controller between 12 e 24 Vdc. The
selection is carried out when the controller is powered. If the controller previously measured a
value lower than, or equal to, 17 Vdc, it considers to be powered by a 12 Vdc battery;
otherwise, it will consider a 24 Vdc rated voltage.
Type: Warning
Related parameters: P.0393 Second threshold for high battery voltage (%)
P.0394 Delay for high battery voltage second threshold
To disable: P.0394=0