MD380 User Manual Safety Information and Precautions
- 13 -
3) Motor insulation test
Perform the insulation test when the motor is used for the first time, or when it is
reused after being stored for a long time, or in a regular check-up, in order to prevent
the poor insulation of motor windings from damaging the AC drive. The motor must be
disconnected from the AC drive during the insulation test. A 500-V mega-Ohm meter is
recommended for the test. The insulation resistance must not be less than 5 MΩ.
U V W
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
The AC drive provides frequency output of 0 to 3200 Hz (Up to 300 Hz is supported if
the AC drive runs in CLVC and SFVC). If the AC drive is required to run at over 50 Hz,
consider the capacity of the machine.
6) Vibration 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
The output of the AC drive is pulse width modulation (PWM) wave with certain harmonic
frequencies, and therefore, the motor temperature, noise, and vibration are slightly
greater than when the drive runs at power frequency (50 Hz).
To Next Page
Loading...
