Table 7-3 The Rotor Weights For The 1Ph7 Three-Phase Motor Can Be Found In The Following Table - Siemens 1PH728 Operating Instructions Manual

Maintenance
7.3 Repair
Table 7-3
1PH7 28. rotor
Size
Total weight (kg)
Disassembling the three-phase motor
To disassemble the motor, disconnect the connecting cables from the terminals and the
entry plate from the terminal box housing.
In this way, the respective positioning of the cables in relation to one another and sealing of
the cables in the cable entries is largely maintained.
Disconnect the connecting cables in the terminal box of the fan motor and, if necessary, the
cable from the ground terminal. Furthermore, disconnect the speed sensor plug connector.
Links
The terminal diagram (see "Connecting the stator winding") contains the conditions required
for line connection.
Installing the active parts of the bearings
Notice
We recommend that you label the components that comprise the active part of the bearing
before dismantling them, in order to ensure correct reassembly.
Notice
When dismantling and assembling the bearings, make sure that you match up the
components correctly (bearings, preloading springs, equalizing rings, caps with different
centering length, etc.), especially when the bearings at the drive end and non-drive end are
the same size.
Notice
Label the components before dismantling.
Notice
Whenever you work on the locating bearing when the three-phase motor is in its vertical
position, support/unload the rotor.
7-10
The rotor weights for the 1PH7 three-phase motor can be found in the following table:
284
343
286
410
Siemens AG A5E00177602A
Operating Instructions V 2.0 1PH728
288
489