18
Operating Instructions – Explosion-Proof CMP Synchronous Servomotors
4
Preliminary
Mechanical Installation
4.3.1
Long-term storage of servomotors
• The service life of the ball bearing grease is reduced after storage periods exceeding
one year.
• Check whether the servomotor has absorbed moisture as a result of being stored for
a long time. Measure the insulation resistance with a measurement voltage of
DC 500 V.
The following figure shows the insulation resistance depending on the temperature.
4.3.2
Insulation resistance too low
NOTE
The insulation resistance varies greatly depending on the temperature, see following
figure. You can measure the insulation resistance between the connection pins and the
motor housing using an insulation measuring device.
53725AXX
[1]
Resistance/temperature point (RT point)
100
10
1
0,1
0
20
40
60
80
[˚C]
[M
Ω
]
[1]
NOTE
Insulation resistance too low:
Servomotor has absorbed moisture.
Measure: Send the servomotor to SEW-EURODRIVE Service with a description of the
error.
Summary of Contents for CMP40
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