TM 9-6115-604-34NAVFAC P-8-633-34(2)Test.(a)Start and operate the generator set in droop mode and allow it to stabilize at rated load, ratedvoltage, and rated frequency (speed). During this period, readings of all engine control panelinstruments and thermal instrumentation shall be recorded at minimum intervals of 10 minutes. Ifnecessary, adjustments to the load, voltage, and rated frequency may be made to maintain ratedload at rated voltage and rated frequency; but adjustments to the voltage and frequency shall belimited to the operator voltage and frequency adjust devices. No other adjustments to the voltageand frequency control systems should be made. Adjustments to the load, voltage, or frequencycontrol systems shall be recorded on the data sheet. Stabilization will be considered to haveoccurred when three consecutive readings of the lubricating oil temperature have remained constantat the rated load. Minor variations in temperature are permissible provided that a continued increaseor decrease does not take place.(b)Perform this test using a resistive load only. Remove the reactive portion of the load afterstabilization.(c)Load the set to the maximum attainable load, and adjust the frequency to the rated value. Maintainthe load for 5 minutes.(d)Record all instrument readings.(e)Allow the set to cool at rated load for 10 minutes.d.Results. Compare the maximum power value obtained to the values and conditions listed in Table 12-3.12-28. START AND STOP TEST.a.General. The generator set must start and stop without erratic operation when following the operatinginstructions on the set. The start and stop test may be run concurrently with any of the above tests that meet therequirements of step c, below.b.Apparatus. A stopwatch is required.c.Procedure. The following steps shall be repeated three times:(1)Using the watch and the operating instructions on the set, record the time required to start the setand bring it to rated speed.(2)With the circuit breaker closed, operate the set at rated voltage, rated frequency, and no load for 5minutes.(3)Using the stopwatch and the operating instructions on the set, record the time required to stop theset.d.Results.(1)The set shall come up to rated speed in 5 minutes.(2)The set shall stop without prolonged run-on in a maximum of 30 start and seconds.12-36
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