SEW-Eurodrive DR 315 Series, Руководство по эксплуатации

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4
Mechanical installation
Preliminary work after longer periods of storage
Operating Instructions – AC Motors
32
4.2 Preliminary work after longer periods of storage
Depending on the duration and ambient conditions during storage, corrosion, aging of
lubricants, embrittlement of sealing elements, and moisture absorption in the insula-
tion may occur.
Drives that have been stored for longer than 9 months may require the following
measures.
Corrosion
• Check for damage to motor and/or components (coating, shafts, connection and
fastening parts).
• Correct corrosion damage.
Embrittlement of seals
• Visually inspect seals and look for tears, hardening, and embrittlement.
• Replace any damaged seals.
Reduced grease service life
If the drives are stored for longer than a year, the service life of the bearing grease is
reduced due to aging and de-oiling of the lubricant.
• Check the condition and usability of the rolling bearings.
• Replace any damaged rolling bearing.
Reduced grease quantity
• If motors are stored for longer than 5 years, regrease them according to the spe-
cifications on the motor nameplate using a relubrication device.
Moisture absorption
• Check to see that the wiring space of the motor is dry and clean.
• Remove moisture and dirt.
• If the motor has absorbed moisture, measure the insulation resistance (see
chapter "Measuring the insulation resistance" (→
2
32)) and dry the motor (see
chapter "Drying the motor" (→
2
34)).
4.2.1 Checking the brake
If motors with brake have been stored or non-operational for longer than 9 months,
check their function before taking them into operation.
4.2.2 Measuring the insulation resistance
The insulation resistance (see following figure) varies greatly depending on the tem-
perature.
25851535/EN – 02/2019