Teco Installation and Maintenance Manual
TEFC Squirrel Cage Induction Motors
Teco Electric and Machinery Company
Manual Number: IOM ~ TEFC Rev.01
14
performance characteristics that may differ from those at the rated
conditions:
+/- 10% of rated voltage
+/- 5% of rated frequency
+/- 10% combined voltage and frequency variation so long as frequency
variation is no more than +/- 5% of rated value.
Operating the motor at voltage and frequencies outside of the above limits
can result in both unsatisfactory motor performance and damage to/or
failure of the motor.
3.8.2.
Motor connections should be carried out in accordance with the details
applicable to the appropriate supply voltage as shown on the motor
nameplate and should be undertaken by suitably qualified personnel.
3.8.3.
The main lead box furnished with the motor has been sized to provide
adequate space for the make up of the connections between the motor lead
cables and the incoming power cables.
3.8.4.
The motors are provided with grounding pads and/or bolts for the
connection of earthing.
The bolted joints between the motor lead and the power cables must be
made and insulated in a workman-like manner following the best trade
practices and in accordance with the minimum requirements of the current
Australian Standards.
The motor must be grounded by a proper connection to the electrical
grounding system and in accordance with the minimum requirements of the
Australian Standards.
Motors fitted with insulated bearings and rotor grounding brushes which are
used on VVVF Drives must be effectively earthed to the supply system.
