MTD 464 Betriebsanleitung PDF herunterladen (Seite 184)

ARMY TM 9-6115-464-34

AIR FORCE 35C2-3-445-2

NAVY NAVFAC P-8-624-34

Section Vlll. MAINTENANCE OF GENERATOR SET CONTROLS

3-58. GENERAL.

This section contains maintenance instructions for the generator set controls. The control cubicle assembly and

sensing monitors contain the controls, instruments and indicators for controlling and monitoring the operation of

the generator set. Precise models of the generator set incorporate a governor control unit which signals the

actuator unit to change the fuel injection pump governor setting which controls engine speed and, thus,

generator frequency. This function is assumed by the manual speed control on utility models. The

interconnecting wiring harnesses provide electrical connection between major assemblies and the control

cubicle and fault locating indicator.

3-59. CONTROL CUBICLE ASSEMBLY.

a. Frequency Meter and Transducer.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

Refer to the Operator and Unit Maintenance Manual and remove, clean, and inspect frequency

meter and transducer.

Install frequency meter and transducer in a test setup as shown in figure 3-54.

NOTE

Test frequency meter must have an accuracy of 0.05 percent.

Activate sinusoidal source and adjust its output as indicated by the test frequency meter to the lowest

frequency indication on the frequency meter being tested (388 Hz for a 400 Hz frequency meter and

48 Hz for a 50/60 Hz frequency meter).

Rotate adjusting screw of frequency meter being tested until its indication exactly matches that of the

test frequency meter.

If the frequency meter being tested cannot be properly adjusted, replace it and the frequency

transducer.

When frequency meter being tested has been properly adjusted, slowly increase the sinusoidal

source frequency to the highest value of the frequency meter being tested (412 Hz for a 400 Hz

frequency meter and 62 Hz for a 50/60 Hz frequency meter).

If at any point the indication of the frequency meter being tested varies more than 0.25 percent from

that of the test frequency meter, replace both transducer and frequency meter being tested.

Refer to the Operator and Unit Maintenance Manual and install frequency meter and transducer.

b. Kilowatt Meter

and Thermal Converter.

(1) Refer to the Operator and Unit Maintenance Manual and remove, clean, and inspect kilowatt meter

and thermal converter.

(2) Test ac kilowatt meter and converter as follows:

(a) Connect a calibrated kilowatt meter and a suitable variable load to the generator set load terminal

board.

(b) Refer to the Operator and Unit Maintenance Manual and start the generator set.

3-130

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