WEG S Series - Air Gap Measurment; Spare Parts

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11866576 Installation, Operation and Maintenance Manual – Synchronous Motors – S Line – Brushless – Horizontal l 49
NOTE
The resistance class is normally indicated on
the head of hex bolts.
A
TTENTION
The assembly of the flywheel, if any, must be
done according to the motor assembly manual.
If further information is necessary, consult WEG.
8.4 AIR GAP MEASURMENT
After the motor assembly, it is necessary to measure the
air gap in order to check the concentricity between rotor
and stator.
Measure the air gap in all rotor poles in four equidistant
points of the stator (e.g. 45°, 135°, 210° and 330°).
It is also necessary to measure the exciter and auxiliary
exciter air gap. Removing the exciter inspection cover,
make the measurement as it is done in the motor.
The difference between the air gap measured in two
points diametrically opposed must be less than 10% of
the average air gap.
8.5 SPARE PARTS
WEG recommends keeping in stock the following spare
parts:
 DE and NDE rolling bearings;
 Bearing shell for DE bearing and NDE bearings (sleeve
bearings);
 Labyrinth taconite seal for DE bearing and NDE
bearings (sleeve bearings);
 Temperature sensor for DE and NDE bearings;
 Space heater;
 Filter felts (if any);
 Rectifier set;
 Varistor set;
 Lubricant for the bearings;
 Brake pads (if any);
 Shaft grounding brush (if any);
The spare parts must be stored in clean, dry, well
ventilated environments and, if possible, at constant
temperature.