Low-Voltage Motors In Variable-Speed Operation; Maintenance; General Inspection; Standby Motors - ABB HDP – IP54 Séries Manuel D'installation, D'exploitation Et De Maintenance

5. Low-voltage motors in
variable-speed operation
HDP motors are intended to be coupled with ABB
ACS850, ACS880, ACSM1 or MotiFlex frequency convert-
ers, or frequency converters in general. Therefore, the
technical documentation of the frequency converter must
be studied before attempting any work on, or with, the
motor.
The frequency converter should be selected according to
the nominal power and the rated power of the motor,
leaving a margin for energy regeneration in dynamic
situations. Selection tables for HDP motors and ACS850,
ACS880, ACSM1 or MotiFlex converters for operation in
continuous duty (S1) are available from ABB. Other cou-
plings are possible and must be estimated for variable
loads or different duty types.

6. Maintenance

WARNING
A motor with frequency converter supply may be
energized even if the motor is at a standstill.

6.1 General inspection

1. Inspect the motor at regular intervals. The frequency of
checks depends on, for example, the humidity level of
the ambient air and the local weather conditions. This
can initially be determined experimentally and must
then be strictly adhered to.
2. Keep the motor, fan grid and filters clean in order to
ensure free ventilation and cooling.
3. Check the condition of shaft seals (e.g. V-ring or radial
seal) and replace if necessary.
4. Check the condition of connections and mounting and
assembly bolts.
5. Check the condition of the bearings by listening for any
unusual noise, measuring vibration and bearing tem-
perature, and inspecting spent grease. Pay special
attention to bearings when their calculated rated life is
coming to an end.
When signs of wear are noticed, dismantle the motor,
check the parts and replace if necessary. When bearings
are changed, replacement bearings must be of the same
type as those originally fitted. The shaft seals must be
replaced with seals of the same quality and characteristics
as the originals when changing bearings.

6.1.1 Standby motors

If the motor is in standby for a longer period of time on a
ship or in another vibrating environment, the following
measures have to be taken:
1. The shaft must be rotated regularly every two weeks (to
be reported) by means of starting up the system. If
startup is not possible for any reason, at least the shaft
must be turned by hand in order to achieve a different
position once a week. Vibration caused by other
equipment on the vessel will cause pitting of the
bearing, which should be minimized by regular opera-
tion / hand turning.
2. The bearing must be greased while rotating the shaft
every year (to be reported). If the motor has been
supplied with a roller bearing at the driven end, the
transport lock must be removed before the shaft is
rotated.
The transport locking must be remounted before any
transportation.
3. All vibration must be avoided to prevent the bearings
from failing. All instructions in the motor instruction
manual for commissioning and maintenance must also
be followed. The warranty will not cover damage to the
windings and bearings if these instructions have not
been followed.
9AKK105975, Rev. A 01-2015 | ABB Motors and Generators EN – 11