Hitachi SJ Series, User Manual

Page: 161 / 786

12-3-2
Chapter 12 Inverter Functions
The motor could burn if the base frequency
is set smaller than the motor frequency.
(Smaller than 50 Hz in case of standard
induction motor)
For setting the max. frequency larger than
60 Hz, contact the motor manufacturer
about allowed max. frequency.
Capacity and number of poles
• The inverter reads out preset standard motor data
if the capacity and number of poles are changed.
• The motor disturbance could be suppressed and
the motor operation could be stabilized if the
capacity and number of poles are correctly set.
Base frequency
• Set the base frequency according to the motor
specifications.
• The induction motor should be regarded as a
special one if used at higher than 60 Hz. In this
case, the inverter capacity may need to be made
larger as the maximum capacity of the inverter
motor is incorrect.
Max. frequency
• Sets the max. frequency of motor to use.
The motor could burn if the max.
frequency and rated voltage are set out
of the range specified in the motor
specifications.
After initialization, the motor protection
function needs to be configured again.
Otherwise, the motor could burn.
Rated voltage
• Set the rated voltage of motor according to the
motor specifications.
• Expected characteristics may not be obtained if the
motor rated voltage is set higher than receiving
voltage or inverter rated voltage.
• Set the rated voltage of motor in the following way
if it is switched from SJ700.
[Hb106]=A082×A045/100
Rated current
• Set the rated current of motor according to the
motor specifications. Inappropriate setting could
disturb the motor protection.
• The motor control could become unstable unless
the motor rated current is correctly set.
• Expected characteristics may not be obtained if the
motor rated current is set higher than the inverter
rated current. In some cases, the inverter
protection works first.
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Caution
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Caution
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Caution
Burnout