Operating instructions

Section 1
General Information
2-4 Installation & Operation MN400
First Time Start Up Be sure that all power to motor and accessories is off. Be sure the motor shaft is disconnected from
the load and will not cause mechanical rotation of the motor shaft.
1. Make sure that the mechanical installation is secure. All bolts and nuts are tightened etc.
2. If motor has been in storage or idle for some time, check winding insulation integrity.
3. Inspect all electrical connections for proper termination, clearance, mechanical strength and electrical
continuity.
4. Be sure all shipping materials and braces (if used) are removed from motor shaft.
5. Manually rotate the motor shaft to ensure that it rotates freely.
6. Replace all panels and covers that were removed during installation.
7. Momentarily apply power and check the direction of rotation of the motor shaft.
8. If motor rotation is wrong, be sure power is off and change the motor lead connections.
Verify rotation direction before you continue.
9. Start the motor and ensure operation is smooth without excessive vibration or noise.
If so, run the motor for 1 hour with no load connected.
10. After 1 hour of operation, disconnect power and connect the load to the motor shaft. Verify all
coupling guards and protective devices are installed. Ensure motor is properly ventilated.
Coupled Start Up
This procedure assumes a coupled start up. Also, that the first time start up procedure was
successful.
1. Check the coupling and ensure that all guards and protective devices are installed.
2. Check that the coupling is properly aligned and not binding.
3. The first coupled start up should be with no load. Apply power and verify that the load is not
transmitting excessive vibration back to the motor though the coupling or the foundation. Vibration
should be at an acceptable level.
4. Run for approximately 1 hour with the driven equipment in an unloaded condition.
The equipment can now be loaded and operated within specified limits. Do not exceed the name plate
ratings for amperes for steady continuous loads.
Jogging and Repeated Starts
Repeated starts and/or jogs of induction motors generally reduce the life of the motor
winding insulation. A much greater amount of heat is produced by each acceleration or jog than by the
same motor under full load. If it is necessary to repeatedly start or jog the motor, it is advisable to check
the application with your local Baldor distributor or Baldor Service Center.
Heating - Duty rating and maximum ambient temperature are stated on the motor name plate.
Do not exceed these values. If there is any question regarding safe operation, contact your local Baldor
District Office or Baldor Service Center.