Rockwell Automation Publication 750-IN001P-EN-P - April 2017 217
Power Wiring Chapter 4
Table 46 - Recommended Power Jumper Configurations Floor Mount Frames 8…10
To connect or disconnect these devices, see the jumper locations that are shown
in the figures on pages Figure 122 on page 218
through Figure 127 on
page 223.
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
, for more information on impedance grounded and
ungrounded systems.
Power Source Type Jumper PE-A1
(1)
(MOV)
(1) When MOVs are disconnected, the power system must have its own transient protection to confirm known and controlled
voltages.
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 that 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
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