ABB ACS 300, Руководство пользователя

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66 ACS 300 User’s Manual
Chapter 7 - Drive Parameters
RESTART # Number of times the ACS 300 will automatically reset the fault
and restart after any of the following faults: Undervoltage,
Overvoltage, Overcurrent, Low AI-Signal, Unit Fault. For further
information on fault tracing refer to chapter 8 Fault Tracing, page
77. If you select OFF, the automatic fault reset system is not in
operation.
TEMP LIM The ACS 300 motor thermal protection (sometimes called I
2
t or
solid state overload protection) is activated by using the TEMP
LIM parameter. When set to OFF, the motor overload protection
is deactivated. The TEMP LIM and MOTOR I parameters define
the continuous safe operating area for the motor, as illustrated in
Figure 7-6.
Figure 7-6 Motor thermal protection.
When the motor current exceeds the level determined by the safe
operating area, the ACS 300 will begin calculating excessive
temperature rise in the motor. When the ACS 300 has
determined that the motor has exceeded its allowable
temperature rise, it will stop the motor and indicate a “MOTOR
OUTPUT FREQ[Hz
]
OUTPUT CURRENT
TEMP LIM
typically 35 Hz NOM FREQ
I LIMIT
50 Hz
MOTOR I
Continuous safe
operating area for motor