Troubleshooting and fault elimination
8-7
48XX/49XXSHB0399
8.5 Checking the drive system
Note!
The measurements should be made with a digital voltmeter. The stated measuring
values are rated values. In the event of deviations, a defect has occured.
8.5.1 Checking the motor
Warning!
( The measurements described must only be carried out by specialists.
( Disconnect the motor from the mains.
( Tests should only be carried out when no voltage is applied!
Measurement Measuring point Measured value
Armature resistance A B at the controller R
A
<10W
Insulation resistance of the armature A earth potential
B earth potential
R
Field resistance I K R
F
<1kW
Insulation resistance of the field I earth potential
K earth potential
R
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