WEG W01 Manual De Instalación, Operación Y Mantenimiento página 5

The motor must be installed with overload protection devices. For three-phase motors, it is recommended
to install a phase failure protection device. When motor is fitted with temperature-monitoring devices in the
stator windings and/or bearings, they must be connected during the operation and even during tests.
Ensure the correct operation of the accessories (brake, encoder, thermal protection, forced ventilation,
etc.) installed on the motor before it is started.
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 WEG variable frequency drives only.
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 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.
Low and High Voltage Electric Motors | 5