DST2600 User’s Manual 7
DST2600 has over-current protection for the battery connection and for the mains and genset
connections. They are made by fuses.
Before change any fuse, check that no harmful voltages are present: stop the
genset by emergency stop, open the mains line and disconnect the genset battery.
Replace them only with the same fuse types as those listed below.
There are:
-
One ATO (or AL) fuse of 35A: it is connected between the battery and the power outputs
“
START
” and “
FUEL
”. It fuses in case of overload on these outputs.
-
An auto resettable fuse of 5A is inserted between the positive battery and the panel supply:
it open in case of panel failure or polarity inversion or overload at the auxiliary relay output
J200-
7. If mains is present, the opening of the fuse doesn’t shutdown the panel that is
supplied by the charge maintainer; if mains is not present that panel will shutdown. Do not
overcharge the auxiliary output J200-7 (max. 3A).
-
An auto resettable fuse of 2.5A acts as charge maintainer protection. It opens in case of
hardware failure.
-
Two auto resettable fuses of 2.5A and 5A, to protect the auxiliary outputs at battery voltage
respectively J405 and J406
Auto resettable fuses work as thermal switch and don’t require any operator procedure:
remove the overload source and wait for protection cooling down.
Each line input, both mains and generator, has a protection fuse. The fuse type is a 5x20mm,
1A and it is used to protect against internal faults. Only exceptions: fuse F203 on mains phase
L1 and F200 on generator phase L1 are 2A fuses. The reason is that F203 output supplies the
contactor
“
KM
”
and the charge maintainer. F200 supply the contactor
“
KG
”.
To summarize:
4 5x20mm fuses of 1A: F201, F202, F204, F205
2 5x20mm fuses of 2A: F200, F203
The fuse of one of this protection yields a measurement error, like the phase missing.
In auto mode, the opening of one of the fuses placed as mains line protection (F203, F204,
F205) will cause the genset start for mains failure; F203 will cause, in addition, the switch off
of the charge maintainer and the drop of
“KM” changeover (so loads will be no more supplied
by mains).
The opening of one of the fuses placed as generator line protections (F200, F201 and F202)
will cause in
“AUTO” mode an anomaly activation upon the generator status (“operating
condition failure”, “under-voltage” or “under-frequency” depending by the opened fuse and
when the failure appears); in manual mode there isn’t any signalling of anomalies but the
changeover on genset is not allowed since the generator is not seen in the “ready to supply”
window .
