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12.13
Checking armature for short to earth
•
Measure resistance between slip rings and ar-
mature.
L Note:
The resistance must be infinitely large.
Measurement result: ...................... OL = open line
Checking resistance between phase outputs
•
Check resistance between each pair of outputs.
1 – 2
1 – 3
2 – 3
Nominal resistance: . . . . . . . . . . . . . . . . . . . . . .0,6 Ω
The winding is in perfect working order at measured
values below 1.0
Ω.
Checking stator winding for short to earth
•
Check winding outputs individually with respect
to earth.
L Note:
The resistance must be infinitely large.
Measurement result: OL = open line.
LT120120
OL
LT120130
1
2
3
LT120140