Drying The Stator Winding Insulation; Spare Parts - WEG W22 Premium E3 Manual De Instalación, Operación Y Mantenimiento

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8.4. DRYING THE STATOR WINDING INSULATION

Dismantle the motor completely. Remove the end shields, the rotor with the shaft, the fan cover, the fan and the
terminal box before the wound stator with the frame is transferred to the oven for the drying process. Place the
wound stator in the oven heated to max. 120 °C for two hours. For larger motors a longer drying time may be
required. After the drying process has been concluded, allow the stator to cool to room temperature. Measure
the insulation resistance again as described in item 5.4. Repeat the stator drying process if the required
insulation resistance does not meet the values specified in Table 5.3. If the insulation resistance does not
improve despite several drying processes, evaluate the causes of the insulation resistance drop carefully and an
eventual replacement of the motor winding may be required. If in doubt contact WEG.
To prevent electrical shock, discharge the motor terminals immediately before, and after each
measurement. If the motor is equipped with capacitors, these must be discharged before beginning any
repair.

8.5. SPARE PARTS

When ordering spare parts, always provide complete motor designation, indicating the motor type, the code
number and the serial number, which are stated on the motor nameplate.
Spare parts must always be purchased from WEG authorized Service Centers. The use of non-original spare
parts can cause motor failure, performance drop and void the product warranty.
The spare parts must be stored in a clean, dry and properly ventilated room, with relative air humidity not
exceeding 60%, with ambient temperature between 5 °C and 40 °C, free of dust, vibrations, gases, corrosive
smokes and at constant temperature. The spare parts must be stored in their normal mounting position without
placing other components onto them.
Figure 8.3 - Exploded view of the components of a motor with type of protection "n".
118 Manual of Electric Motors