Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List page 99

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
(3) Current Limiting / Soft Starting Control
a Press the "STARTNG CURRENT" push button to activate the current limiting and set the limit
to 1500 A.
b Press the "DC OUTPUT" push button to close the contactors to apply the load to the load
bank. Observe the ammeter, the current should stay below 1500 A.
c Discontinue the power delivery.
(4) Over-Voltage Protection
a Press "DC OUTPUT" push button to close the DC output contactor. The blue "DC OUTPUT"
lamp will glow indicating that DC power is being delivered to the load bank.
b Adjust the voltage adjustment potentiometer on the TRB PC Board to range of 32-34 VDC.
c With 7 to 9 seconds after the trip voltage is reached, the contactor will open and an over-
voltage fault will be indicated on the fault code meter, which will read "70.28"
d Reset the voltage back to 28.5 VDC.
(5) Under-Voltage Protection
a Press "DC OUTPUT" push button to close the DC output contactor. The blue "DC OUTPUT"
lamp will glow indicating that DC power is being delivered to the load bank.
b Adjust the voltage adjustment potentiometer on the TRB PC Board to less than 20 VDC.
c With 7 to 9 seconds after the trip voltage is reached, the contactor will open and an under-
voltage fault will be indicated on the fault code meter, which will read "70.29"
d Reset the voltage back to 28.5 VDC.
(6) Overload Protection
a Press the "STARTNG CURRENT" push button to activate the current limiting and set the limit
to 1500 A.
b Press "DC OUTPUT" push button to close the DC output contactor. The blue "DC OUTPUT"
lamp will glow indicating that DC power is being delivered to the load bank.
c The contactor should open in 30 seconds. The fault code meter will read "70.30"
d Discontinue power delivery and let the cables cool for 2-3 minutes.
e Press the "STARTNG CURRENT" push button to activate the current limiting and set the limit
to 2000 A.
f Press "DC OUTPUT" push button to close the DC output contactor. The blue "DC OUTPUT"
lamp will glow indicating that DC power is being delivered to the load bank.
May 2, 2013 Chapter 2-3
Page 17