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IV. Storage
1. Storage
(1) In case that the motor is stored for 3 months or longer till the initial operation after receiving
it or its operation is stopped for 3 months or longer, take the following steps.
1) Storage
: The motor should be placed in the same posture with
correct installation state, covered with waterproof sheet,
and be kept at a dry place.
2) Exposed machined surface
: Apply rust-preventive agent every 6 months. If motor is
export-packed, unpack it after elapse of one year and apply
the rust-preventive agent.
3) Rotation of shaft
: Operate the motor for a few minutes every 3 months (and
before long storage) or rotate the shaft manually about 10
times. If motor is export-packed, follow item 4) below.
4) Bearing and lubrication
・
Shielded bearing
: After storage of motor for 2 years or longer, pay attention
whether abnormal sound is heard from bearing during trial
operation. If it is heard, replace the bearing.
・
Grease replenishment type : Replenish the quantity shown on the name plate, rotating
the shaft manually or operating the motor every one year.
(If the motor is export-packed, unpack it temporarily and
replenish the grease.)
5) Insulation resistance of
winding
: In case that the motor is not used for a long time, measure
the insulation resistance of winding of the winding every 6
months and before starting of operation. If resistance is
lower than 1 MΩ at ordinary temperature and its cause is
not the moisture adsorption in the terminal box, dry the
winding.
6) Space heater
(when provided)
: When the motor is stopped for 1 day or longer, energize the
heater.
7) Surface painting
: Re-paint every 2 years, as the need arises.
8) Drain plug
(when provided)
: Open the drain plug periodically (at least every 6 months)
and before starting of operation.
