P-9-TM-457-35 T.O. 35C2-3-442-2
TM-07464A-35 TM 5-6115-457-34
NOTE
9. Check resistance between con-
nector J61 pins B and C using a Wheatstone
Bridge or other suitable low resistance
sembly simplified schematic.
measuring device. Resistance should be
1.23 ohms 10 percent for 50/60 hertz
13. Disconnect end bell and exciter
generator sets and 1.51 ohms 10 percent
stator assembly (61, figure 7-1) from gen-
for 400 hertz generator sets.
erator by removing screws (59) and lock
washer (60). Tag and disconnect six diode
10. Check insulation resistance of
leads from rectifier assembly (12) and test
exciter stator by electrically bonding con-
each diode for an open or short.
nector J61 pins B and C together. Connect
lead from pins to a 500 volt megger and
14. Tag and disconnect two main
connect other megger lead to frame. Re-
rotor leads from rectifier assembly. Check
sistance reading should be a minimum of
resistance between two stator leads using a
50K ohms.
Kelvin Bridge or other suitable low resis-
NOTE
tance measuring device. Resistance should
be 0.834 ohm 10 percent for 50/60 hertz
Interconnecting wiring information
generator sets and 0.703 ohms 10 percent
is contained in Operator and Or-
for 400 hertz generator sets.
ganizational Maintenance Manual.
15. Check insulation resistance of
11. Remove plastic shield from re-
main rotor by electrically bonding the two
connection panel. Remove voltage change
leads together. Connect leads to a 500 volt
over board. Disconnect electrical connector
megger and connect other megger lead to
P10 from mode I or mode II relay box con-
rotor shaft. Resistance reading should be
nector J10, and electrical connector P13
a minimum of 50K ohms.
from exciter regulator connector J13. Check
16. Tag and disconnect three exciter
resistance between generator leads T1-T4,
rotor leads from rectifier assembly. Check
T2-T5, T3-T6, T7-T10, T8-T11, and
resistance between exciter rotor leads
T9-T12, using a Kelvin Bridge or other
R1-R2 and R1-R3, using a Kelvin Bridge or
suitable low resistance measuring device.
other suitable low resistance measuring
Resistance should be 0.00974 ohm 10 per-
device. Resistance should be 0.0772 ohm
cent for 50/60 hertz generator sets and
10 percent.
0.00490 ohm 10 percent for 400 hertz
generator sets.
17. Check insulation resistance of
exciter rotor by electrically bonding the
12. Check insulation resistance of
three leads together. Connect leads to a
main stator by electrically bonding all
500 volt megger and connect other megger
twelve leads (T1 thru T12) together. Con-
lead to rotor shaft. Resistance reading
nect a lead from the twelve generator leads
should be a minimum of 50K ohms.
to a 500 volt megger and connect other meg-
ger lead to frame. Resistance reading
18. Connect main stator, exciter
should be a minimum of 50K ohms. Connect
rotor, and diode leads to rectifier assembly.
electrical connector P10 to J10 on mode I or
Install endbell and exciter stator assembly
mode II relay box and electrical connector
(61). Connect electrical connector P61 to
P13 to J13 on exciter regulator. Install
electrical connector J61 on generator end-
voltage change over board and plastic shield
bell. Install generator air inlet louver and
over the reconnection board.
7-2
