OMEC MOTORS
OMT1 & OMT2 Mounting & Maintenance Instructions
Page 9
7.
PUTTING INTO SERVICE
Before putting a motor into service, one should check especially when the motor has not
been used for a long time that the insulation resistance of the winding is sufficient. The
insulation resistance has to be at least 10 meg/ohms on a 1000V megger.
If the insulation resistance is not high enough, the motor has to be dried out and
revarnished or rewound. Check all connections and adjust the thermal protection units to
the correct current. Switch the motor on in a no load state to determine the direction of
rotation. Load the motor gradually and check whether it runs without vibration.
The motor can be used under deviation of the main voltage ± 5% or frequency of max. ±
2% compared to the nominal frequency or nominal voltage, in compliance with the
international regulations for electric machines.
8.
MAINTENANCE
The totally enclosed and fan cooled three phase squirrel cage induction motors
require very little maintenance.
Nevertheless it is recommended to check the motor regularly in order to prevent a
breakdown caused by dust, moisture, vibrations, too much or too little greasing.
8.1.
Dust
The outer parts of the totally enclosed motors, especially the cooling ribs or cooling
channels, have to be kept as clean as possible in order not to obstruct the cooling air from
the fan extracting the heat from the motor frame.
