Figure 4-21. Connections for Testing Motor Insulation Resistance: a) (Top) connections for a DC motor b) (Bottom) connections for an AC motor

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Table 4-3. AC induction motor trouble-shooting

TM 5-683/NAVFAC MO-116/AFJMAN 32-1083

BRUSHES LIFTED OFF

COMMUTATOR

A.C.

MOTOR

EART

MAIN SWITCH

INSULATION

SOURCE

Figure 4-21. Connections for Testing Motor Insulation Resistance: a) (Top) connections for a DC motor

b) (Bottom) connections for an AC motor.

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