Chapter 4. Installation
4.3 Wiring of Main Power Supply Circuit
4.3.1 Description on Main Power Supply Terminals
4.3.2 Cautions when wiring the Main Power Supply
Execute wiring work after checking if DC power of drive is discharged (under 30V).
Be sure to install wiring breaker (MCCB) between AC input power and drive input power terminals (R,S,T).
Use the wiring breaker (MCCB) with 1.5~2 times larger capacity than rated current of the drive.
Sometimes EMI occurs due to high speed switching of the drive and it makes radio interference on
electronic devices used around the drive. For that case, install EMC filters
between AC power input and the drive to reduce interference.
If AC input power is connected to output terminals (U,V,W) of drive, drive will be damaged.
Be sure to connect it to input terminals.
Even though power input terminals (R,S,T) may be connected regardless to phase sequence of AC
input power, it is required to consider rotation direction of the motor when connecting input terminals
of the motor to output terminals of the drive (U,V,W). If rotation direction of the motor is reversed, 2
lines from drive output terminals (U,V,W) should be exchanged each other.
Do not make short circuit nor ground with drive output terminals (U,V,W). Short circuit or ground of
output terminals may damage on the drive.
R
S
T
FG
FG
U
V
W
Terminal Sign
Description: 3 Phase
R, S, T
FG
U, V, W
Terminal Name
AC Input
Ground
Drive output
To connect commercial AC Input.
It is a ground terminal on drive enclosure. Please ground it.
To connect Motor.
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