MTD 464 Betriebsanleitung PDF herunterladen (Seite 393)

100

101

ARMY TM 9-6115-464-34

AIR FORCE TO 35C2-3-445-2

NAVY NAVFAC P-8-624-34

(h)

(i)

NOTE

This step is not applicable to generator sets having governors that utilize a threaded

shaft and lock nut(s) or other mechanical means as a method of operator speed

adjustment.

Adjust the generator set frequency for the minimum attainable frequency. Read and record all

instrument readings.

NOTE

This step is not applicable to generator sets having governors that utilize a threaded

shaft and lock (nuts) or other operator speed alignment.

Repeat 4-16c (1) and 4-16c. (2) (a) through (f) for each frequency.

d. Results. The data sheet shall show the maximum and minimum frequencies attained at rated 109d, the

maximum and minimum attainable frequencies at no load and actuation of the protection devices (if applicable).

Compare these results with the requirements of table 4-1.

4-16. OVERSPEED PROTECTIVE DEVICE TEST

a. General. To assure that adequate protection is afforded the generator set against overspeeding, the

overspeed protective device must operate properly.

b. Apparatus.

A frequency meter or tachometer as described and illustrated in MIL-HDBK–705, Methods

104.1 or 109.1 shall be required.

c. Procedure.

(1) Preparation for Test. Connect the frequency meter in accordance with the applicable figure of

MIL-HDBK-705, Method 205.1, Paragraph 205.1.9 or utilize the tachometer in accordance with the

manufacturer’s instructions. Electronic governor and throttle stops must be deactivated.

(2) Test.

(a) Start and operate the generator set at rated speed (frequency), rated voltage and no load.

(b) Slowly increase the engine speed until the overspeed protective device actuates. Record the speed

of the generator set at this point, and the malfunction indicator light indication.

CAUTION

Do not operate the set in excess of 125 percent of rated speed or as otherwise limited

the equipment.

protective device.

(d) Compare the test results with requirement of table 4-1.

4-16

in the procurement document. Failure to observe this caution could result in damage to

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