ITW GSE 4400 Tier 4, Руководство пользователя, Страница: 87 / 126

Operation Manual – ITW GSE 4400 Tier 4
g) Re-checking the entire unit after testing:
1) Start the engine. With the engine running at normal rated speed, check the entire unit for
vibration and for any parts that may have become loosened during the above checks.
Tighten any loose hardware as required.
2) Check engine oil pressure at rated speed (2000 RPM). The oil pressure gauge should
indicate at least 44.9 psi (3.1 bar) when engine is hot. Also at rated speed, check the engine
coolant temperature. The temperature gage should indicate in the range of 180°F to 190°F
(82ºC to 88ºC), depending upon operating conditions.
WARNING
If a metal sounding rod is used to detect bearing noises, exercise extreme care to
avoid injury from moving components.
3) Check 400 Hz generator bearings. Use a stethoscope or metal sounding rod to listen for
unusual noises. If using a metal rod, place on end on the generator housing and hold the
other end near the ear. Hold the rod with three fingers and use the index finger and thumb to
form a sounding chamber between the rod and the ear. Do NOT allow the rod to touch the
ear. Listen for grinding or pounding sounds, which would indicate a defective bearing. An
engine noise may be telegraphed to the generator and misinterpreted as a generator noise.
Contact the equipment manufacturer if in doubt of bearing serviceability.
3) Generator Set Adjustment
a) Generator Adjustment
The 400 Hz generator is a brushless type requiring no adjustments of any kind.
For the following adjustment, the generator set must be running at rated speed (2000 RPM),
under no-load conditions. Adjust the regulator as follows:
1) Output Voltage Adjustment
a) Adjust Voltage Control
The output voltage, at which the generator is regulated, is adjustable using the “Output
Voltage screen in the Setup Menu. (See Chapter 1-3, Paragraph 4.1)
Observe the output voltage using a true RMS multimeter. Set the output voltage at 115
VAC line-to-neutral (200 VAC line-to-line).
b) Adjust Line-Drop Compensation
Adjustment of line-drop compensation is made using the “Output 1 (or 2) Compensation”
screens in the Setup Menu. (See Chapter 1-3 Paragraph 4.2 & 4.3) To adjust the line-
drop compensation, proceed as follows:
i. Connect the generator set output cables to a load (typically a load bank). Load the
generator set with the largest available three-phase load of rated power factor not
exceeding the maximum rating of the generator set. (i.e. 72 kW for a 90 kVA at 0.8
pf generator)
ii. Measure the output voltage at the load end of the cables as you increase the load
from zero to the maximum full load rating of the unit. If the voltage at the end of the
cable rises or drops more than 1%, decrease or increase the line-drop
compensation until the regulation is flat (115 VAC line-to-neutral).
OM2247 Rev B Page 86 of 125