Inovance MD280NT2.2GB - Page 12

MD280 User Manual Safety Information and Precautions
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Megger
Input terminals
of the motor
Ground
4 Thermal protection of motor
If the rated capacity of the motor selected does not match that of the AC drive,
especially when the AC drive's rated power is greater than the motor's, adjust the motor
protection parameters on the operation panel of the AC drive or install a thermal relay
in the motor circuit for protection.
5 Running at over 50 Hz
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at over 50 Hz, consider the capacity of the machine.
6 Vi
bration of mechanical device
The AC drive may encounter the mechanical resonance point at some output
frequencies, which can be avoided by setting the skip frequency.
7 Motor heat and noise
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harmonics, and therefore, the motor temperature, noise, and vibration are slightly
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8 Vo
ltage-sensitive device or capacitor on output side of the AC drive
Do not install the capacitor for improving power factor or lightning protection voltage-
sensitive resistor on the output side of the AC drive because the output of the AC drive
is PWM wave. Otherwise, the AC drive may suffer transient overcurrent or even be
damaged.
M
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Capacitor or
voltage-sensitive
resistor
AC
drive
9 Contactor at the I/O terminal of the AC drive
When a contactor is installed between the input side of the AC drive
and the power
supply, the AC drive must not be started or stopped by switching the contactor on or
off. If the AC drive has to be operated by the contactor, ensure that the time interval
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