Deep Sea Electronics Plc DSE8660 MKII

Operation
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5.10.3 OPERATION
Before the generator sets are started, their load switches are closed. As there is no AC supply the
load switches must be DC controlled. Next, the alternator excitation field is disabled by isolating the
supply to the AVRs. The engines are all started at the same time and allowed for the Excitation Delay
timer to reach the desired operating speed. As there is no AC supply generated, frequency cannot be
used to determine engine speed, hence the requirement for an MPU of CAN speed signal.
If the engines have attained the desired engine speed within the Excitation Delay timer, the AVR’s
power supply is reconnected, enabling the excitation field and load sharing begins. The MSC link is
used to ensure all sets excite their alternators at exactly the same time. Any generators not up to
speed before the end of the Excitation Delay timer are instructed to open their load switches. A short
time later, these sets synchronise to the bus in the traditional manner.
Status
Start Delay
00:00 s
Status
Fuel
Status
Crank Attempt
Status
Excitation Delay
L-N 0 V
L-L 0 V
kW 0 kW
00:03
0 A
0 Hz
0 pf
Status
Excitation Delay
L-N 230 V
L-L 400 V
kW 100 kW
00:00
174 A
50 Hz
0.8 pf
Status
On Load
Excitation output closed &
voltage rises to nominal settings.
Once the voltage and frequency are within
configurable limits the set(s) can take load.
The generator load switch is
closed, excitation is switched
off, start delay if configured.
Fuel output is activated
on the DSE8610 MKII
Engine is cranked on
the DSE8610 MKII
Excitation Delay
before excitation output is activated.
Generators run up to speed if any on the MSC are out
of limits they are instructed to open their load switches
and synchronise in the normal manner.