OM-2245 / Operation and Maintenance Manual
ITW GSE 4400 / 400 Hz. Generator Set
March 15, 2015
Chapter 2-3
Page 4
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).
c) Basic
Engine
Adjustments
Adjustment procedures applicable to the
diesel engine are included in the engine manufacturer’s
operation manual, which is referenced in Chapter 5. Refer to the engine operation manual for
detailed information on the following engine adjustments.
NOTE:
A stroboscope is required for engine idle speed checks.
Engine idle speed is programmed at the factory. If adjustment is required, contact the local engine
distributor. The recommended idle speed is 1000 RPM, +/- 25 RPM.
The speed limiting adjustment is also set and sealed at the factory. Speed should be limited to
approximately 2350 RPM. If adjustment is required, contact your local engine distributor.
d) Engine
Accessories
Adjustment
Alternator and fan belt adjustment: Refer to Section 2-1 and engine manufacturer manual.