Motors With Permanently Greased Bearings; Motors With Regreasable Bearings; Lubrication Intervals And Amounts - ABB M2A Manual De Instalación E Usuario

6.2.1 Motors with permanently greased
bearings
Bearings are usually permanently greased bearings of 1Z,
2Z, 2RS or equivalent types.
As a guide, adequate lubrication for sizes up to 250 can
be achieved for the following duration, according to L
For duties with higher ambient temperatures please
contact ABB. The formula to change the L
to L values: L = 2.7 x L1.
10 10
Duty hours for permanently greased bearings at ambient
temperatures of 25 and 40°C are:
Frame size Poles
71 2
71 4-8
80-90 2
80-90 4-8
100-112 2
100-112 4-8
132 2
132 4-8
160 2
160 4-8
180 2
180 4-8
200 2
200 4-8
225 2
225 4-8
250 2
250 4-8
These values are valid for permitted load values given in
the product catalog. Depending on application and load
conditions, see the applicable product catalog or contact
ABB.
Operation hours for vertical motors are half of the above
values.

6.2.2 Motors with regreasable bearings

Lubrication information plate and general lubrication
advice
If the machine is equipped with a lubrication information
plate, follow the given values.
On the lubrication information plate, greasing intervals
regarding mounting, ambient temperature and rotational
speed are defined.
During the first start or after a bearing lubrication a tempo-
rary temperature rise may appear, approximately 10 to 20
hours.
Some motors may be equipped with a collector for old
grease. Follow the special instructions given for the
equipment.
After regreasing an Ex tD-motor, clean the motor end
shields so they are free of any dust layer.
16 – EN ABB Motors and Generators | Low voltage Ex motor manual 01-2007
1
values roughly
1
Duty hours Duty hours
at 25°C at 40°C
32 000 20000
41 000 25000
24 000 15000
36 000 22000
21 000 12000
33 000 20000
16 000 10000
29 000 18000
37 000 23000
76 000 48000
31 000 19000
71 000 44000
25 000 15000
61 000 38000
22 000 14000
56 000 35000
17 000 11000
48 000 30000
A. Manual lubrication
Regreasing while the motor is running
– Remove grease outlet plug or open closing valve if
fitted.
– Be sure that the lubrication channel is open
– Inject the specified amount of grease into the bearing.
.
– Let the motor run for 1-2 hours to ensure that all excess
grease is forced out of the bearing. Close the grease
outlet plug or closing valve if fitted.
Regreasing while the motor is at a standstill
Regrease motors while running. If it is not possible to
regrease the bearings while the motors are running,
lubrication can be carried out while the machine is at a
standstill.
– In this case use only half the quantity of grease and then
run the motor for a few minutes at full speed.
– When the motor has stopped, apply the rest of the
specified amount of grease to the bearing.
– After 1-2 running hours close the grease outlet plug or
closing valve if fitted.
B. Automatic lubrication
The grease outlet plug must be removed permanently with
automatic lubrication or open closing valve if fitted.
ABB recommends only the use of electromechanical
systems.
The amount of grease per lubrication interval stated in the
table should be doubled if an automatic regreasing system
is used.
When 2-pole motors are automatically regreased, the note
concerning lubricant recommendations for 2-pole motors
in the Lubricants chapter should be followed.

6.2.3 Lubrication intervals and amounts

Lubrication intervals for vertical machines are half of the
values shown in the table below.
The lubrication intervals are based on a bearing operating
temperature of 80°C (ambient temperature +25°). Note!
An increase in the ambient temperature raises the tem-
perature of the bearings correspondingly. The values
should be halved for a 15°C increase in bearing tempera-
ture and may be doubled for a 15°C decrease in bearing
temperature.
Higher speed operation, e.g. in frequency converter
applications, or lower speed with heavy load will require
shorter lubrication intervals.
WARNING
The maximum operating temperature of the grease
and bearings, +110°C, must not be exceeded.
The designed maximum speed of the motor must
not be exceeded.