dooch Q-Drive NQ-0550-T - Main Power and Ground Wiring

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[CHAPTER 4 INSTALLATION]
4-3| DOOCHPUMP
4.3 Wiring of Main Power Supply Circuit
4.3.1 Description on Main Power Supply Terminals
R S T FG FG U V W
Terminal
Sign
Terminal Name Description
R,S,T AC Input To connect commercial AC Input.
FG Ground It is a ground terminal on drive enclosure. Please ground it.
U,V,W Drive Output To connect Motor.
4.3.2 Cautions on Main Power Supply Wiring
• 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.
• Do not connect static condenser or noise filter at the output of the drive. It may
cause frequent trip on the drive, or static condenser or noise filter may be destroyed
due to overheating.
• Use specified thickness of wires for input/output wiring for the drive. If wires are