OHMMETER
(CHECK FOR GROUNDS)
ASf06026
OHMMETER
(CHECK FOR SHORTS & OPENS)
Figure 6-26.--Testing the rotor for grounds, shorts, and opens.
Testing the Stator
from either slip ring to the rotor shaft (fig. 6-26). A low
ohmmeter reading or lighting of the test lamp indicates
The stator windings are tested for opens and
that the rotor winding is grounded and the rotor needs to
grounds after the stator has been removed from the slip
be replaced. To test the rotor winding for opens and
ring end frame assembly. If the ohmmeter reading is
shorts, connect an ohmmeter or a test lamp to both slip
low or if the test lamp lights when connected between
rings, as shown in figure 6-26. An ohmmeter reading
each pair of stator leads (fig. 6-27), the stator winding is
below the specified resistance value indicates a short,
electrically good. A high ohmmeter reading or failure
whereas a reading above the specified value indicates
of the test lamp to light when connected between any
an open. If the test lamp does not light when connected
two of the stator leads indicates an open winding. A low
to both slip rings, the winding is open, and the rotor
ohmmeter reading or lighting of the test lamp when
needs to be replaced.
OHMMETER
(CHECK FOR OPENS)
OHMMETER
OHMMETER
(CHECK FOR OPENS)
(CHECK FOR GROUNDS)
ASf06027
Figure 6-27.--Testing the stator for opens and grounds.
6-22
