WEG WG20 - Direction of Rotation; Oil Level in the Gear Unit as Delivered; Operation

WG20 Geared Motors | E-25
11. Operation
10.2. Direction of rotation
10.3. Oil level in the gear unit as delivered
The standard motors are suitable for clockwise and counter-clockwise rotation. Connection of the power cables in the
phase sequence L1, L2, L3 to U1, V1, W1 results in clockwise rotation (looking at the shaft end on the drive side).
If two connections are interchanged, this results in counterclockwise rotation (e.g. L1, L2, L3 to V1, U1, W1).
The proper oil level for the mounting position is designed by the plant. See gear unit nameplate for the
precise amount of oil to add.
Gear units that are ordered without oil lling are supplied with internal rust proong consisting of anti-corrosion oil. The
anti-corrosion oil can however be mixed with the recommended lubricant indicated on the nameplate. This means that the
unit does not have to be ushed before lling with oil.
If the gear unit is opened, for example: to make repairs, it must be lled with the correct lubricant in the correct amount as
stated on the nameplate before being put back into service. For lubricants see page E-28.
During the operation, the gear unit must be tested under maximum load for:
■ unusual noises,
■ vibrations and unusual oscillations,
■ smoke formation,
■ leaks.
■ With shrink disc types: After demounting the cover cap, check whether any relative movement has occurred between
the hollow shaft and the machine shaft. Then reinstall the cover guard.
■ Maximum gear housing temperature 90 °C.
Gear housing temperature:
During the operation, the surface temperature must be measured in the maximum operating condition. The max. surface
temperature is reached in about 3 hours, and it must not exceed 90°C.
The surface temperature shall be measured with standard commercially available temperature-measuring instruments.
The drive must be shut down if any abnormalities relative to the items listed above have been noted upon
inspection. Contact the producer.
A motor circuit breaker or contactor with an overcurrent relay should be installed to prevent the motor winding from
burning out. Fuses do not stop the motor overloading, but merely protect the power cables or switchgear from
damage in the event of a short circuit. Before energizing the motor, always make sure that the optional anti-con-
densation heating is switched off.
ATTENTION!
ATTENTION!
A change in the mounting position must not be made before consulting the producer.
ATTENTION!
ATTENTION!