| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-220-14-2
2-42.
PARALLELING GENERATORS (Cont).
k. Place a load of about 60% of full load on the generator. Turn on fans, motors, etc. Note the voltage droop on
voltmeter (4).
1. Place the generator #1 circuit breaker (3) in the OFF position.
m. Place the generator #2 circuit breaker (2) in the ON position.
n. Adjust generator #2 droop rheostat (11) so that the voltage on generator (5) reads the same as that noted on
generator #1 voltmeter (4).
NOTE
The voltage and frequency load characteristics on both generators must be the
same, before any attempt to parallel is made.
Generator #2 is supplying power to the vessel.
o. Adjust the speed of generator #1 to slightly more than generator #2. Rotate governor motor switch (12) to raise.
p. Place the synchronizing scope switch (13) in generator #1 in the ON position.
q. Observe the rotation of the pointer on the synchroscope (14). Adjust the speed of generator #1 by rotating the
governor motor switch (12). The pointer should rotate very slowly clockwise. If the synchroscope pointer rotates
rapidly in a clockwise direction, the speed of generator #1 is too fast and should be lowered. If the pointer is
rotating at any speed in the counter-clockwise direction, the speed is too slow and must be increased.
r. The synchroscope (14) is rotating very slowly in the clockwise direction. When the pointer comes to the 11 o'clock
position, place the generator #1 main circuit breaker (3) in the ON position.
s. Place the frequency meter switch (15) on generator #1. Make note of the reading on the frequency meter (16) .
t. Repeat item s. above using generator #2.
u. Observe the wattmeters (17 and 18) and the ammeters (19 and 20) and adjust as follows:
(1) If the frequency is too high or low - adjust either generator #1 or #2 governor motor switches (12 or 21), until
the frequency meter (16) indicates both generators the same: also the wattmeters (17 and 18) are the same.
Change 2
2-397
|
||
|
||
