1.4. 2 G r o unding
• The drive must be solidly grounded using the main circuit ground terminal.
• If Drive is installed in a cabinet with other equipment, ground leads for all equipment should be
connected to a common low-impedance ground point within the cabinet.
• The supply neutral should be connected to the ground point within the cabinet.
• Select appropriate ground wire size from Table 1-1.
• Make all ground wires as short as practical.
• NEVER ground the drive in common with welding machines or other high power electrical
equipment.
• Where several drives are used, ground each directly to the ground point (see Figure 1-1). DO
NOT FORM A LOOP WITH THE GROUND LEADS.
• When connecting a motor to the drive’s output terminals, include a separate ground wire. Attach
ground wire solidly to motor frame and to drive’s ground terminal.
• When using armored or shielded cable for connection between drive and motor, solidly connect
armor or shield to motor frame, and to the drive’s ground terminal.
A disconnect device (circuit breaker, contactor, disconnect switch, etc.) should NOT be used as a
means of starting and stopping the drive or motor.
A disconnect device can be installed for emergency stop purposes, but when that disconnect
device is opened, there may be loss of electrical braking.
1-11
Figure 1-1. Grounding
A. Grounding of Three Drives
B. Grounding of Drive & Vector Control Motor (VCM)
PREFERRED NOT RECOMMENDED NOT
ACCEPTABLE
CORRECT NOT RECOMMENDED
1. 4. 3 Auxilia ry Input an d O utput Po wer Op ti on Devic es
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