User Manual Instruction Manual

5-4
GV6000 AC Drive User Manual
5.3 Installing Output Power Wiring
To connect the AC output power wiring from the drive to the motor:
Step 1. Wire the three-phase AC output power motor leads by routing them
according to drive type. See figures 3.8 and 3.9 for wire routing locations.
Do not route more than three sets of motor leads through a single conduit.
This will minimize cross-talk that could reduce the effectiveness of noise
reduction methods. If more than three drive/motor connections per conduit
are required, shielded cable must be used. If possible, each conduit should
contain only one set of motor leads.
Step 2. Connect the three-phase AC output power motor leads to terminals U/T1,
V/T2, and W/T3 on the power terminal block.
Step 3. Tighten the three-phase AC output power terminals to the proper torque
according to drive type
as shown in table 5.2.
5.4 Installing Input Wiring
Sections 5.3.1 to 5.3.4 describe incoming line components and how to install them.
5.4.1 Installing an Optional Transformer and Reactor
Input isolation transformers might be needed to help eliminate:
Damaging AC line voltage transients from reaching the drive.
Line noise from the drive back to the incoming power source.
Damaging currents that could develop if a point inside the drive becomes grounded.
Observe these guidelines when installing an isolation transformer:
A power disconnecting device must be installed between the power line and the
primary of the transformer.
If the user-installed power disconnecting device is a circuit breaker, the circuit
breaker trip rating must be coordinated with the in-rush current (10 to 12 times full
load current) of the transformer.
Do not use an input isolation transformer rated more than
1000 KVA for 480 VAC with less than 5% impedance directly ahead of the drive
without additional impedance between the drive and the transformer.
!
ATTENTION:Do not route signal and control wiring with power wiring in
the same conduit. This can cause interference with drive operation.
Failure to observe these precautions could result in damage to, or
destruction of, the equipment
ATTENTION:Unused wires in conduit must be grounded at both ends to
avoid a possible shock hazard caused by induced voltages. Also, if a drive
sharing a conduit is being serviced or installed, all drives using this conduit
should be disabled to eliminate the possible shock hazard from
cross-coupled motor leads. Failure to observe these precautions could
result in bodily injury.