Manual

196 Rockwell Automation Publication 750-IN001N-EN-P - April 2014
PowerFlex 750-Series AC Drives
Table 30 - Recommended Power Jumper Configurations Floor Mount Frames 8…10
To connect or disconnect these devices, refer to the jumper locations shown in
the figures on pages 197
through 202.
In addition, on an ungrounded distribution system where the line-to-ground
voltages on any phase could exceed 125% of the nominal line-to-line voltage, an
isolation transformer should be installed. See Wiring and Grounding Guidelines
for Pulse Width Modulated (PWM) AC Drives, publication DRIVES-IN001
at
www.rockwellautomation.com/literature
for more information on impedance
grounded and ungrounded systems.
Power Source Type Jumper PE-A1
(1)
(MOV)
Jumper PE-A2
(Input Filter Caps)
Jumper PE-B
(DC Bus Common mode
Caps)
Benefits Of Correct
Configuration on Power
Source Type
Non-Solid Ground
• AC fed ungrounded
• Impedance grounded
• B phase ground
• DC fed from an active converter
Disconnected Disconnected Disconnected Helps avoid severe equipment
damage when ground fault occurs
Solid Ground
• AC fed solidly grounded
• DC fed from passive rectifier which
has a solidly grounded AC source
Connected Connected Connected UL compliance, Reduced electrical
noise, Most stable operation, EMC
compliance, Reduced voltage
stress on components and motor
bearings
(1) When MOVs are disconnected, the power system must have its own transient protection to ensure known and controlled voltages.