WEG Electric Motor W22Xtb 71

Warning: This procedure requires trained personnel with PPE!

End shields, rotor with shaft, fan cover, fan and terminal box removed

Wound stator with frame transferred to oven

Wound stator placed in oven for two hours

Is the motor large? If yes, extend drying time

Stator cooled to room temperature after drying

Enter the measured insulation resistance

Warning: All repair services on motors for use in hazardous areas must be performed by qualified personnel and in accordance with applicable laws and regulations.

Motor disconnected from the power supply and is completely stopped?

Motor terminals inside the terminal box free of dangerous voltages?

Motor windings used as space heaters free of dangerous voltages?

Motor terminals free of dangerous voltages when driven by a frequency inverter even when the motor is completely stopped?

Enclosure surface cooled to ambient temperature before opening the terminal box and/or disassembling the motor?

Record installation conditions such as terminal connection diagram and alignment or leveling conditions

Motor disassembled carefully without scratching machined surfaces or damaging threads?

Motor assembled on a flat surface ensuring a stable support base?

Warning: This procedure requires trained personnel with PPE!

The machine must be in a cold state and disconnected from the power supply.

The insulation resistance must be measured in a safe environment.

Is the machine in a cold state and disconnected from the power supply?

Is the environment safe for insulation resistance measurement?

It is recommended to insulate and test each phase separately.

Is each phase insulated and tested separately?

During the test of one phase, the other phases must be grounded.

Are the other phases grounded during the test of one phase?

Visual inspection of the motor and coupling

Check for abnormal noises, vibrations, excessive heating, wear signs, misalignment or damaged parts

Upload a photo of the damaged parts

Measure the insulation resistance

Oil spills and dust accumulation removed from the motor frame surface

Motor cleaned carefully to prevent electrostatic discharge

Cooling fan condition checked and air inlet & outlet openings cleaned

Condition of the seals checked and replaced if required

Warning: Proper lubrication plays a vital role in motor performance

Only use the grease or oil types, amounts and lubrication intervals recommended for the bearings

Lubrication procedures must be carried out according to the type of lubricant (oil or grease)

The grease and oil disposal should be made in compliance with applicable laws in each country

Excess grease causes bearing overheating, resulting in bearing failure

For each increment of 15 °C above the room temperature, the relubrication intervals given in the Table must be halved

The relubrication interval of motors designed for horizontal mounting but installed vertically (with WEG authorization) must be halved

For special applications such as high and low temperatures, aggressive environments, or driven by frequency inverter (VFD), contact WEG about the required amount of grease and relubrication intervals

Motor disassembly must be carried out as specified in Item 8.3