General Precautions - Canworld CDE360 Series Manual

CDE360 Vector Control AC Drive Chapter 1 Safety Information and Precautions

1.2 General Precautions

 Ground Connection
The incorrect earthing may cause personal injury, death or equipment failure, and increase the
electromagnetic interference.
The correct earthing the AC drive, motor or other devices can guarantee the safety of the operator
in any case and reduce the electromagnetic radiation and interference.
If the leakage current of the AC drive is greater than AC 3.5mA or DC 10mA , connecting a fixed
protection earthing cable is needed.
Earthing terminals of several AC drives can not be connected in series.
Only when the conduct interface dimension of the cable shielding layer conforms to safety
regulations, the cable can be used for earthing.
 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
winding from damaging the AC drive. During the insulation test, the motor must be disconnected
from the AC drive. A 500-V mega-Ohm meter is recommended for the test and the insulation
resistance must not be less than 5M Ohms.
 Thermal protection of the motor
If the rated capacity of the motor selected does not match that of the AC drive, especially when the
rated power of the AC drive is greater than that of the motor, please adjust the motor protection
parameters on the operation panel of the AC drive or install a thermal relay in the motor for
protection.
 Running at over 50 Hz
This series AC drive can provide output frequency of 0~600Hz(0~3000Hz for CDE360B type). If the
AC drive needs to run at higher frequency than base frequency(50Hz or 60 Hz), the capability of the
mechanical device must be considered.
 Vibration of mechanical device
The AC drive may encounter mechanical resonance points at some output frequencies, which can
be avoided by setting skip frequencies on the keypad.
 The heat and noise of the motor
The output of the AC drive is pulse width modulation (PWM) wave with certain harmonic frequencies,
and therefore, the temperature rise of the motor, noise and vibration will be increase slightly
compared with power frequency operation.
 Voltage-sensitive devices or capacitors for improving power factor on the output side of
the AC drive
Because the output of the AC drive is PWM wave, please do not install capacitors for improving
power factor or lightning protection voltage-sensitive resistors on the output side of the AC drive.
Otherwise, the AC drive may suffer transient fault trip or being damaged.