ARMY TM 9-6115-604-12NAVY NAVFAC P-8-633-12Figure 4-35. Checking Pinion Clearancec.Install.(1 ) Replace starter motors B1 and B2 and starter slave relays K1 and K2, and secure to engineassembly with machine bolts, washers, and lock washers.(2)Connect wiring as tagged In step a, above, to electrical solenoids, starter motors, and starterrelays. Discard tags.(3) Reconnect battery power.SECTION IX. MAINTENANCE OF AC ELECTRICAL POWER GENERATION AND CONTROL SYSTEM4-34.GENERAL.a.GeneratorG1Operation. See FO-2.(1) The generator is a brushless, 4-pole type, producing 60 Hz power at 1800 rpm or 50 Hz power at1500 rpm. For 60 Hz operation, the generator produces 2400/4160 volts of 3-phase power in wyeconfiguration (2400 volts line-to-neutral, 4160 volts line-to-line). For 50 Hz operation, the generatorproduces 2200/3800 volts of 3-phase power in wye configuration (2200 volts line-to-neutral, 3800volts line-to-line).(2) AC generators require direct current flow through the rotor winding to set up the magnetic flux whichallows the unit to generate. A small exciter provides this direct current. The exciter is mounted onthe same shaft as the generator rotor. The main generator field rotates and the armature is fixedwhile the exciter field is fixed and the armature rotates. The output from this exciter is fed into therectifying elements mounted on a heat sink. This rectifier assembly is located on the end of the mainshaft, opposite the drive end.(3) The ac exciter requires direct current for its excitation. This excitation is suppliers by rectifying aportion of the output of the main generator by means of a static voltage regulator. The amount ofcurrent going into the field of the exciter will determine the output voltage of the exciter, and this inturn will control the output voltage of the main generator.(4) Current boost module A101 provides additional exciter field current if the generator output voltageshould fall below a set level.4-90
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