User’s Manual 43
Starting from SW revision 08.00.22, the software is no more the same for the two version of
the board. The correspondent SW version for the DST4600A/P is 12.05.22.
The input function is specialized for the parallel fault condition.
The only difference between DST4600A and DST4600A/P is the default of the P65 (ALARM2
(terminal 02) filter time): for DST4600A/P is 180s instead of 1s.
Now DST4600A/P boards use KR as status for MAINS ALIVE.
Enabling the internal MAINS VOLTAGE sensor and connecting the GRID line to the R-S-T
input terminal, KR will be deactivated if the MAINS is OK, and otherwise it will be activated.
If the internal MAINS VOLTAGE sensor is disabled, KR will be always in deactivated status.
The “MAINS SIMULATION” input (terminal 24) will never interfere on KR status.
DST4600A/P boards will drive activated KG during test operation when the Generator set will
be ready to supply.
This feature is valid for all type of test operation.
The operator can manually deactivate KG.
Boards with the new SW version
use P66 and P67 values as delay time related to the “MAINS
SIMULATION” input status change.
DST4600A has default values of 0 for both P66 and P67.
DST4600A/P has default value of 2s for P66 and 30s for P67.
Starting from SW revision 08.00.39, the software is no more the same for the asynchronous
engine version of the board. The correspondent SW version is 29.07.39. This software is built
over the DST4600A/P software. This paragraph shows the differences between this new
software and the DST4600A/P one.
The board measures the generator frequency and voltages and shows them on the panel. But
it does not use them for any protection and for engine running/stopped detection.
In the standard version, this terminal acquires the low oil pressure alarm. In this version, it
acquires the engine running status, and so the low oil pressure alarm is disabled.
