OM-2245 / Operation and Maintenance Manual
ITW GSE 4400 / 400 Hz. Generator Set
March 15, 2015
Chapter 2-3
Page 7
(3) Current Limiting / Soft Start Control
The Current Limit default value is set using the “
28V Current Limit”
screen in the Setup Menu
(See Chapter 1-3 Paragraph 4.19). In order to change the value for the current aircraft (and this
test), use the RIGHT and LEFT navigation buttons when the diesel is running, the 28VDC ARU is
NOT on and the “default” operator screen is displayed. The current limit settings a
re from 200
amps to 1600 amps for the 400 amp version of the unit and from 400 amps to 2400 amps for the
600 amp version.
a
Start the diesel engine.
b
Once the engine has stabilized at its running speed, use the Right or Left navigation buttons
to set the current limit to 1400 amps.
c
Press the “
28VDC
”
pushbutton to close the contactor to apply the load to the load bank.
d
Press the “Engine Test” switch on the load bank. Verify that the current never exceeds 1400
amps.
e
Press “
28 VDC
” pushbutton to open the DC
output contactor. The green LED will turn off,
indicating that DC power has been removed from the load bank.
7) Adjusting the Transformer-Rectifier (for units with DC option)
The T-R is design to be adjustment free. No adjustments required, other than periodically checking the
output voltage and adjusting the 28.5 volts from the
“28V Voltage”
screen as necessary.
