Lenze 4800 Manual page 252

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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
Armature resistance
Insulation resistance of the armature A “ earth potential
Field resistance
Insulation resistance of the field
Troubleshooting and fault elimination
Measuring point
A “ B at the controller
B “ earth potential
I “ K
I “ earth potential
K “ earth potential
Measured value
< 10 W
R
A
R “ Š
R < 1kW
F
R “ Š
48XX/49XXSHB0399
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