DSE Model 5520 Automatic Mains Failure Control and Instrumentation System Operators Manual
5520 OPERATING MANUAL ISSUE 1 04/02/05 AM
9
After the starter motor has disengaged, the
Safety On
timer is activated, allowing Oil Pressure,
High Engine Temperature, Under-speed, Charge Fail and any delayed Auxiliary fault inputs to
stabilise without triggering the fault.
Once the engine is running, the
Warm Up
timer, if selected is initiated, allowing the engine to
stabilise before accepting the load.
If an auxiliary output has been selected to give a
load transfer
signal, this would then activate.
NOTE:-A load transfer will not be initiated until the Oil Pressure has risen. Thus
preventing excessive wear on the engine.
On the return of the mains supply, (or removal of the
Remote Start
signal if the set was started by
remote signal), the
Stop
delay timer is initiated. Once it has timed out, the set is synchronised and
paralleled with the mains supply. The
load Transfer
signal is then de-energised, removing the
l
oad
f
r
om
t
he
genset
and
compl
et
i
ng
t
he
“
no
br
eak
r
et
ur
n”
.
The
Cooling
timer is then initiated, allowing the engine a cooling down period off load before
shutting down. Once the
Cooling
timer expires the
Fuel Solenoid
is de-energised, bringing the
generator to a stop.
Should the mains supply fall outside limits again (or the
Remote Start
signal be re-activated)
during the cooling down period, the set will return on load.
NOTE:- When synchronising is enabled, the mains supply is checked before
closing any load switching device. If the supply is live, synchronising will take place
before any closure takes place.
NOTE:- Synchronising can be disabled if the application does not require this
function. Contact your genset supplier in the first instance for further details.