TP-6053 7/0440 Section 7 Generator Troubleshooting
4. Perform a megohmmeter test on the stator as
described in the next step. Consider the stator
good if the resistance reading (continuity) is low
and there is no evidence of shorted windings (heat
discoloration).
Note: When taking an ohmmeter reading using
lead 55, make the connection prior to the
in-line fuse.
5. Check the stator for a short to ground using a
megohmmeter. Apply 500 volts DC to any stator
lead from each winding and the stator frame.
Follow the instructions of the megohmmeter
manufacturer when performing this test. Repeat
the test on the other leads until all the stator
windings have been tested. A reading of
approximately 500 kOhms (1/2 megohm) and
higher indicates the stator is good. A reading of
less than approximately 500 kOhms indicates
deterioration of the winding insulation and possible
current flow to ground. Repair or replace the stator.
F+
F--
AC
AC
AC
5588715
33
55
3
44
4
12
B1 B2
F1 F2
1
2
3
4
5
6
7
1. Main field (rotor)
2. Stator windings
3. Rectifier module
4. Shaft connection
5. Megohmmeter
6. Armature
7. Exciter field
Figure 7-15 Megohmmeter Connections on Stator
To Next Page
Loading...
Need help?
General
