MTD 464 Betriebsanleitung PDF herunterladen (Seite 401)

ARMY TM 9-6115-464-34

AIR FORCE TO 35C2-3-445-2

NAVY NAVFAC P-8-624-34

(2) Test.

(a) Start and operate the generator set and allow it to stabilize at rated load, rated voltage and rated

frequency (speed). During this period, readings of all instruments including thermal instrumentation

shall be recorded at minimum intervals of 10 minutes. If necessary, adjustments to the load, voltage

and rated frequency. However, adjustments to the voltage and frequency shall be limited to those

adjustments available to the operator, specifically adjustments to the voltage or frequency adjust

devices. On generator sets utilizing a droop-type speed control system as the prime speed control,

the speed and droop portions of the control maybe adjusted. No other adjustments to the voltage

and frequency control systems shall be made. Adjustments to the load, voltage or frequency

controls shall be recorded on both the data sheet, and recording chart(s). Stabilization will be

considered to have occurred when four consecutive voltage and current recordings of the exciter

field either remain unchanged or have only minor variations about an equilibrium condition with no

evident continued increase or decrease in value after the last adjustment to the load, voltage or

frequency has been made.

(b) Perform this test using resistive load only. Remove reactive load after stabilization.

Alternately increase the load, voltage and frequency in small increments until the fuel system

controls are in the maximum fuel position as permitted by the governor control linkage and the

voltage and frequency are within 1 percent of their rated values.

NOTE

Small increments should be taken to avoid passing the maximum power at the rated

voltage and frequency point and to avoid racing or bogging the engine.

Hold the conditions in step (1) above for two minutes. However, if the voltage and frequency

cannot be maintained within 1 percent of their rated values, the load must be adjusted to the

point at which the voltage and frequency can be maintained within 1 percent of the rated value

for two minutes.

CAUTION

It may be necessary to reduce the load to a value below the rated kilowatt load for a

short period of time to prevent serious overheating or damage to the generator set if

the conditions can not be readily attained. (Monitor instrumentation.) Failure to

observe this caution could result in equipment damage.

At the end of the two minute interval record all instrument readings including thermal

instrumentation.

Reduce the load to approximately rated kilowatt load and allow the generator set to cool for

approximately 5 to 10 minutes.

Repeat steps (1) through (4) above until three valid sets of maximum power data are obtained.

(d) For Class I Sets:

Repeat step (c) above but do not adjust the frequency.

Repeat steps (a) through (c) above as applicable for all other voltage connections and

frequencies.

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