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Motors fitted with Automatic Thermal Protectors will reset automatically as soon as the motor
cools down. Thus, do not use motors with Automatic Thermal Protection in applications
where the auto-reseting of this device may cause injuries to people or damage to equipment.
Motors fitted with Manual Thermal Protectors require manual reset after they trip. If the
Automatic Thermal Protector or the Manual Thermal Protector trip, disconnect the motor from the
power supply and investigate the cause of the thermal protector tripping. W22 Magnet motors must
be driven by variable frequency drives only.
For W60 motors with air-water heat exchanger, please see the nameplate at heat-exchanger.
For information about the use of variable frequency drives, follow the instructions in the documents 50033244
("Installation, Operation and Maintenance Manual of Electric Motors") and 50029350 ("Induction motors fed by
PWM frequency inverters") in the website www.weg.net and in the manual of the variable frequency drive.
4. OPERATION
During operation, do not touch the non-insulated energized parts and never touch or stay too
close to rotating parts.
Ensure that the space heater is always OFF during the motor operation.
The rated performance values and the operating conditions are specified on the motor nameplate. The
voltage and frequency variations of the power supply should never exceed the limits established in the
applicable standards.
Occasional different behavior during the normal operation (actuation of thermal protections, noise level,
vibration level, temperature and current increase) must always be assessed by qualified personnel. In case of
doubt, turn off the motor immediately and contact the nearest WEG service center.
Do not use roller bearings for direct coupling. Motors fitted with roller bearings require radial load to ensure
their proper operation.
For motors fitted with oil lubrication or oil mist systems, the cooling system must be ON even after the
machine is OFF and until the machine is at complete standstill.
After complete standstill, the cooling and lubrication systems (if any exist) must be switched OFF and the
space heaters must be switched ON.
5. MAINTENANCE
Before any service is performed, ensure that motor is at standstill, disconnected from the
power supply and protected against accidental energization. Even when the motor is stopped,
dangerous voltages may be present in space heater terminals.
If motors are fitted with capacitors, discharge them before any handling or service is performed.
Motor disassembly during the warranty period must be performed by a WEG authorized service center
only.
For motors with permanent magnet rotor (lines W22 Quattro and W22 Magnet), the motor assembly
and disassembly require the use of proper devices due to the attracting or repelling forces that occur
between metallic parts. This work must only be performed by a WEG Authorized service center
specifically trained for such an operation. People with pacemakers cannot handle these motors.
The permanent magnets can also cause disturbances or damages to other electric equipment and
components during maintenance.
For the W40, W50 and HGF motor lines provided with axial fans, the motor and the axial fan have different
markings for indicating the direction of rotation for prevent incorrect assembly. The axial fan must be
assembled so that the indicative arrow for direction of rotation is always visible, viewing the non-drive
end side. The marking indicated on the axial fan blade, CW for clockwise direction of rotation or CCW for
counterclockwise direction of rotation, indicates the direction of rotation of the motor viewing the drive
end side.
Regularly inspect the operation of the motor, according to its application, and ensure a free air flow. Inspect
the seals, the fastening bolts, the bearings, the vibration and noise levels, the drain operation, etc.
The lubrication interval is specified on the motor nameplate.
6. ADDITIONAL INFORMATION
For further information about shipment, storage, handling, installation, operation, maintenance and disposal of
electric motors, access the website www.weg.net.
For special applications and operating conditions (for example, smoke extraction motors, totally enclosed
air over (TEAO), motors for high thrust applications, motors with brake) refer to the applicable manual on the
website www.weg.net or contact WEG.
When contacting WEG, please, have the full description of the motor at hand, as well as the serial number and
manufacturing date, indicated on the motor nameplate.
6 | Low and High Voltage Electric Motors
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