Inovance MD500T75G - Page 15

MD500 User Manual Safety Information and Precautions
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7. Voltage-sensitive device or capacitor on the output side of the AC drive
Do not install a capacitor for improving power factor, or a voltage sensitive resistor for lightning protection, on the output side
of the AC drive. This is because the output is a PWM waveform and the AC drive might suffer transient overcurrent or become
damaged.
Figure 2 Disallowed connections to the AC Drive output
Capacitor or
voltage-sensitive resistor
U
V
W
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If there is a contactor installed between the input side of the AC drive and the power supply, DO NOT use it to start or to stop
the AC drive. However, if there is a real and urgent need to use the contactor to start or to stop the AC drive, make sure the
time interval between switching is at least one hour. If the interval between switching is shorter than one hour, this will reduce
the service life of the capacitor inside the AC drive.
If there is a contactor installed between the output side of the AC drive and the motor, do not switch off this contactor when
the AC drive is operating. Damage might occur to components inside the AC drive if you switch off the output contactor when
the AC drive is operating.
Figure 3 Input and output contactors
R
S
T
U
V
W
AC power
input
Input
contactor
Output
contactor
Do not start or stop the AC drive by switching
the input contactor. If you must operate the AC
drive by using the input contactor, wait at least
one hour between switching operations.
Switch the output contactor
on or off ONLY when there is
no output from the AC drive.
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its rated voltage range, components inside the AC drive might be damaged. If necessary, use an appropriate voltage step-up
or step-down device to match the supply voltage to the rated voltage range for the AC drive.
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