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6— 2 Parallel operation
(1) Turn off the breakers on the load side.
(2) Start engine and keep it in warming up.
(3) Equalize all the voltages and frequencies
on the units by adjusting the throttle handle
and voltage regulator.
(4) First turn on the circuit breaker on the
No.l generating set.
(5) Adjust the throttle handle on the No.2 set so
that the two synchronizing lamp on the No.2
set turn on and off synchronizing when the
two phase sequences are in the same direction,
while the two turn and off alternately when the
sequences are in the different direction.
In case the two lamps turn on and off alternately,
recheck the cable connections for correct phase
sequence.
(6) At the instance when the synchronizing lamps
turn off, turn on the breaker on the No.2 set.
[Note]
The generators can damaged due to shortcircuit
current if the breaker is turned on when the lamps
turn on.
CIRCLHl BREAKER
©
OFF
1
2
CO
WARM UP
WARM UP
WARMUP
W CUff WEAKER
ON
(7) Upon the above procedure, the No.l and No.2
sets are in parallel operation. The AC ammeters
are to indicate zero in this no load condition. If
the meters indicate some current, it is an
uneffective cross current due to voltage difference.
Make it zero by adjusting the voltage regulator.
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