Chapter 6 Operation; General; Normal Operating Conditions; Number Of Starts - ABB AMA Series Manual

Chapter 6 Operation

6.1 General

***Following note for rotor type: Permanent magnet rotor

6.2 Normal operating conditions

6.3 Number of starts

3BFP 000 050 R0101 REV E
To ensure trouble-free running a machine must be looked after and carefully supervised.
Always before starting up the machine ensure that:
• The bearings are greased or filled with oil to a correct level in accordance with the
manufacturer's technical specifications and the dimensional drawing
• The cooling system is functioning
• The machine enclosure has been purged and is pressurized if applicable
• No maintenance is ongoing
• The personnel and equipment associated with the machine are ready to start up the
machine.
For start-up procedure, see Chapter 5.6.3 Starting.
In case any deviations from expected normal operation are noticed, e.g. elevated temperatures,
noise or vibration, shut down the machine, and find the reason for the deviations. If necessary,
consult the manufacturer of the machine.
NOTE: The machine may have hot surfaces when running with load.
NOTE: Overloading the machine may cause demagnetization of the permanent magnets as
well as winding damages.
The machines manufactured by ABB are individually designed to operate in normal operation
conditions according to the IEC or NEMA standards, customer specifications and internal ABB
standards.
The operation conditions, such as maximum ambient temperature and maximum operating
height, are specified in the performance data sheet delivered as a part of the project
documentation. The foundation shall be free from external vibration, and the surrounding air
shall be free of dust, salt and corrosive gases or substances
NOTE: The safety precautions shown in Safety Instructions at the beginning of the manual
must be observed at all times.
The number of allowed consecutive starts of direct on line supplied machines depends
essentially on the load characteristics (torque curve vs. rotational speed, inertia), and on the
machine type and design. Too many and/or too heavy starts cause abnormally high temperatures
and stresses on the machine, thus accelerating the ageing of the machine and resulting in an
abnormally short lifetime, or even a machine failure.
Manual for Induction Motors and Generators
Operation - 53