TM 55-2210-223-34
TO 45A2-2-14-22
3-35. EXCITER-AUXILIARY GENERATOR ASSEMBLY (cont)
TEST (cont)
Table 3-2. Exciter-Auxiliary Generator
ITEM
SPECIFICATION
Auxiliary Generator:
Safe speed
2345 rpm maximum
Voltage
75 dc
Armature amperes
150 amps
Main field amperes
8 amps
Number of brush arms
6
Brushes per arm
1
Brush size
1/2 x 1-1/2 inches (12.7 x 38.1 mm)
Brush pressure
2-1/4 to 2-1/2 pounds (1.02 to 1.13 kg)
Brush-to-holder thickness clearance
0.004 to 0.010 inch (0.10 to 0.25 mm)
Brush-to-holder width clearance
1/16 inch (1.6 mm) maximum
Exciter:
Safe speed
2345 rpm maximum
Voltage
75 dc
Armature amperes
110 amps
Main field amperes
3.2 amps
Number of brush arms
6
Brushes per arm
1
Brush size
3/8 x 1 inch (9.5 x 25.4 mm)
Brush pressure
1-1/4 to 1-1/2 pounds (0.5 to 0.68 kg)
Brush-to-holder thickness clearance
0.004 to 0.010 inch (0.10 to 0.25 mm)
Brush-to-holder width clearance
1/16 inch (1.6 mm) maximum
28.
Perform the armature and stator megohmmeter test by the following:
NOTE
A minimum of 500 V at 1 megohm is required for this test.
a.
Place lead (1) of megohmmeter (2) on shaft or core of the armature.
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