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 TM 55-1925-273-10-1
0111 00
! CAUTION
AC AMPERES meter must read at or near 0 or damage to the SSDGs could result.
a.
Set the GEN #1 CKT BKR (figure 1, item 12) to OPEN.
b.
Adjust voltage to 440 using GEN 2 AUTO VOLT RHEO as necessary (figure 1, item 8).
c.
Adjust frequency to 60 hertz using GEN 2 GOVERNOR RAISE LOWER control (figure 1, item 5) as necessary.
TRANSFER THE LOAD FROM SSDG 2 TO SSDG 1
! CAUTION
Ensure that the total load does not exceed the capacity of the SSDG, or damage could result.
1.
Reduce the shipwide electrical load by setting all non-essential circuit breakers to the OFF position.
2.
To transfer the load from SSDG 2 to SSDG 1:
a.
Set the BUS GEN. 1 switch (figure 1, item 1) to 1-2, 2-3, or 3-1 position.
b.
Set the AC AMMETER switch (figure 1, item 2) to 1, 2, or 3 position.
c.
Set the BUS GEN. 2 switch (figure 1, item 3) to 1-2, 2-3, or 3-1 position.
d.
Set the AC AMMETER switch (figure 1, item 4) to 1, 2, or 3 position.
! CAUTION
Do not make one large adjustment to load sharing. Instead, make several small adjustments.
Transferring too large a load too quickly could cause power failure and damage to the generator
windings.
e.
Increase the load on SSDG 1 by positioning GEN 1 GOVERNOR RAISE LOWER control (figure 1, item 6)
towards the RAISE position, and the GEN 2 GOVERNOR RAISE LOWER control (figure 1, item 5) towards the
LOWER position.
f.
Adjust voltage shown on AC VOLTS (figure 1, item 9), as necessary, using GEN 1 AUTO VOLT RHEO. control
(figure 1, item 10) to maintain 440 volts.
g.
Adjust voltage shown on AC VOLTS (figure 1, item 7), as necessary, using GEN 2 AUTO VOLT RHEO. control
(figure 1, item 8) to maintain 440 volts.
h.
Repeat steps e through g above until AC AMPERES meter (figure 1, item 13) for generator 2 reads as low as
possible (at near 0).
3.
To take SSDG 2 offline:
! CAUTION
AC AMPERES meter must read at or near 0 or damage to SSDGs could result.
a.
Set the GEN #2 CKT BKR (figure 1, item 14) to OPEN.
0111 00-3
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