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ELECTRICAL INSTALLATION
Power Wiring Connections
Power Wiring Connections
Contact with hazardous voltage could result in death or serious injury.
•
Disconnect and lock out all power before installing or servicing equipment.
•
Make sure that all DC bus capacitor voltage has dissipated for several minutes after VFD power is dis-
connected before working on wiring.
•
Connect the motor, the drive, metal plumbing, and all other metal near the motor or cable to the
power supply ground terminal using wire no smaller than motor cable wires.
•
Close any open conduit holes before finishing installation.
•
All wiring must comply with the National Electrical Code and local codes.
Incoming Power Supply
Risk of damage to drive
•
Power source line to line, and line to ground voltages must be measured before connecting the
drive. If line to ground voltage exceeds specification, both jumpers of EMC jumpers J10 and J11 must
be removed to prevent damage to the drive. Refer to
•
Ensure that the system is properly grounded all the way to the service entrance panel. Improper
grounding may result in loss of voltage surge protection and interference filtering.
Before connecting power to drive, test incoming voltages as follows:
•
230V Models: The line to line and line to ground voltage must be 190-253V (208-230V ±10%). The line
to ground voltage must be less than or equal to 253 V.
•
460V Models: The line to line and line to ground voltage must be 414-506V (460V ±10%). The line to
ground voltage must be less than or equal to 506 V.
IMPORTANT: If line to line voltage exceeds these ratings, the drive cannot be used on the incoming power
supply. An additional suitably sized transformer will be required to bring the voltages within limits.
IMPORTANT: If line to line voltage is imbalanced, or line to ground voltage is low on one phase, the drive
must be de-rated by 50% to prevent fault tripping on Input Phase Loss (F31). This is common in 230 V applica-
tions with an Open Delta power supply.
IMPORTANT: If line to ground voltage exceeds these ratings, remove Power
Board EMC jumpers from J10 and J11 (four total). This is common in applica-
tions with a Corner-Grounded Delta power supply.
1.
Incoming Power terminal block.
2. Power Out to Motor terminal block.
3. J10 Jumper location (two jumpers here).
4. J11 Jumper location (two jumpers here).
Ground Connections
Follow these grounding requirements to ensure safety and performance.
1.
Make sure a service entrance ground rod is properly installed and connected.
2. An input power ground wire from the supply panel must be connected to the drive.
3. A dedicated output ground wire from the drive must be connected to the motor. Motor and ground
wires must be bundled together.
20
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or malfunction can occur.
"Incoming Power Supply" on page
20.
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