Operation Manual of WEICHAI GENSET
Parallel operation of the set and
precautions
Parallel operation of the set can improve
the reliability and stability of power
supply. In addition, when the load
changes greatly, the number of sets
connected in parallel can be determined
according to the load size, thus realizing
economic operation.
Preparations before paralleling
1. Check whether the diesel, oil and
water levels of the engine and check
battery as well;
2. Check whether the controller and
peripheral wiring are correct and avoid
short circuit according to the electrical
drawings;
3. Check the grounding system: check
whether the grounding of controller
(connected to engine housing), engine
grounding system and grounding of
current transformer are good;
4. Set up the program according to the
drawings;
5. Check whether the single set startup
operation and opening and closing of
circuit breaker are normal;
6. Perform phase sequence detection to
ensure that the phase sequence of all
sets to be connected in parallel is
consistent.
Four elements for parallel connection
1. The phase sequence is the same;
2. The frequency must be the same
(minimal error is allowed);
3. The voltage must be the same
(minimal error allowed);
4. Voltage phase angle must be the same
(minimal error is allowed).
Note: When the parallel switch is closed,
if the above conditions are not met,
excessive mechanical and current impact
will be caused to the alternator and
equipment may get damaged.
Two generator sets in parallel
The two generator sets are
manually/automatically connected in
parallel to the common busbar, and the
controller automatically equalizes the
load and automatically starts/stops the
set according to the load size. The deep-
sea parallel controller supports parallel
connection of 32 sets.
Primary system diagram
Description of two generator sets in
parallel:
■ Two DSE8610 controllers are
selected.
■ The generator set starts
automatically when the "remote on-load
start" input is activated.
■ The set circuit breaker is
automatically controlled.
■ The start and end of the MSC
communication line must be connected
in parallel with a 120Ω resistance.
■ Necessary detection signals such
as generation voltage, generation
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