TM 5-6115-465-34
TO 35C2-3446-2
NAVFAC P-8-625-34
TM 06858 B/068 S9D-34
CHAPTER 4
GENERATOR SET CONTROLS AND INTERCONNECTING WIRING HARNESS REPAIR INSTRUCTIONS
GENERATOR SET CONTROLS
Section I.
NOTE
GENERAL.
4-1.
Test frequency meter must have an accu-
This section contains maintenance instructions
racy of 0.05 percent.
for the generator set controls. The control cubicle
assembly and sensing monitors contain the controls,
(3) Activate sinusoidal source and adjust
instruments and indicators for controlling and mon-
its output as indicated by the test frequency meter
itoring the operation of the generator set. Pre-
to the lowest frequency-indication on the frequency
cise models of the generator set incorporate a
meter being tested (388 Hz for a 400 Hz frequency
governor control unit which signals the actuator
meter and 48 Hz for a 50/60 Hz frequency meter).
unit to change the fuel injection pump governor
setting which controls engine speed and, thus
(4) Rotate adjusting screw of frequency me-
generator frequency. This function is assumed by
ter being tested until its indication exactly
the manual speed control on utility models. The
matches that of the test frequency meter.
interconnecting wiring harnesses provide electri-
cal connection between major assemblies and the
(5) If the frequency meter being tested can-
control cubicle and fault locating indicator.
not be properly adjusted, replace it and the fre-
quency transducer.
CONTROL CUBICLE ASSEMBLY.
4-2.
(6) When frequency meter being tested has
a. Frequency Meter and Transducer.
been properly adjusted, slowly increase the sinus-
oidal" source-frequency to the highestvalue of the
(1) Refer to the Operator and Organizational
frequency meter being tested (412 Hz for a 400 Hz
Maintenance Manual and remove, clean, and inspect
frequency meter and 62 Hz for a 50/60 Hz fre-
frequency meter and transducer.
quency meter).
(2) Install frequency meter and transducer
(7) If at any point the indication of the
in a test setup as shown in figure 4-1.
Frequency Meter And Transducer Test Setup
Figure 4-1.
4-1
Change 5
