KEB COMBIVERT F5, Reference Manual

Page: 149 / 349

149
LM - Motor Data Parameters
Peak motor current factor for drive overload error for PM motors.
This parameter is not applicable to Induction Motors and therefore will not
appear.
For PM motors the current limit for electronic motor protection is set equal to
the rated motor current in LM03. Some motors must be protected from long
term peak current to prevent damage to the motor windings. This parameter
is then used to limit the time of peak current to the motor. If the motor current
exceeds this value for longer than 3.0 seconds, the drive will automatically
trigger the ‘Error Motor Protection’ fault and shut down operation.
When adjusting the rated motor current in LM03, this value is automatically
set to 200% of the LM03 Motor Current. After setting LM03, this parameter
can then be adjusted based on the max. current allowed by the motor
manufacturer.
If this parameter is set too low, it may interfere with operation of the
elevator resulting in shut downs, particularly during acceleration or
decelerations.
This parameter will NOT limit the maximum current output. It is only
used to start the timer which would trigger an ‘Error Motor Protection’
fault. Refer to LC30 Maximum Torque for issues with current limiting.
If the LC30 Maximum Torque is set lower than LM11, peak current will
be limited to the corresponding LC30 value and this function cannot be
realized. Likewise, if the LM11 value is set to a value corresponding to
current greater than the drive peak current rating (Refer to Section 2.4
or 2.5), then this function cannot be realized.
LM11
Peak Motor Current
Factor
i