Generator And Exciter Test - Hobart 60CU24 Operation And Maintenance Manual With Illustrated Parts List

OM-2098C / Operation and Maintenance Manual
60CU24 / Series 500060C / 400 Hz. Generator Set
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.
NOTE: A stroboscope is required for engine idle speed checks.
(4) Engine speed limiting adjustment
The speed limiting adjustment is also set and sealed at the factory. Speed should be limited to
approximately 2750 RPM. If adjustment is required, contact your local engine distributor.
d) Engine Accessories Adjustment
(1) Alternator and fan belt adjustment
Refer to Section 2-1 and engine manufacturer's manual.
Manufacturer
Model No.
Type
Horsepower
Idle speed
High speed limiting
Normal governed speed
Lubricating oil capacity (w/ filter)
Coolant capacity system

4) Generator and Exciter Test

The generator fields and exciter stator may be tested with a Kelvin bridge. This is a double-bridge type
instrument required for the very low resistance's encountered in this test. It is understood that zero (0)
resistance indicates a SHORT CIRCUITED condition. An infinite resistance reading indicates an OPEN
CIRCUITED condition. See Figure 10 for resistance values.
a) Disconnect generator stator leads at the output module panel.
b) Disconnect the two black exciter field leads from terminal block mounted on output module panel.
c) Check resistance and compare to values given in Figure 5.
April 01, 2005
ENGINE
Cummins Engine Company
QSB4.5
In-Line 4 cylinder, 4 cycle diesel, electronic controlled
110 hp (82 kW)
1000 ± 50 rpm
2750 ± 75 rpm
2400 rpm
10 quarts (9.5 liters)
38 quarts (36 liters)
Specifications and Capabilities
Figure 9
Chapter 2-3
Page 15