Diagram Notes:
• AC and DC circuit protection devices are required but not shown. See
Appendix A
for more information.
• The bus supply must be sized to power all inverters connected to the DC bus.
See Sizing Non-Regenerative Bus Supply on page 42
for more information.
• Additional bus capacitance may be required. See General Considerations on
page 39 and Appendix A for more information.
• Additional DC bus conditioner units may be required. See Table 3 on page 39
.
• If inverter DC input disconnect devices are used, the inverter must have a
precharge circuit.
• High-resistance grounded power sources require a ground fault indicator
filter. See Appendix B
for more information.
• Delta secondary power sources require a Zig-Zag Transformer and ground
fault resistor (GFR) to convert the ungrounded power system to resistance
grounded. See Appendix B
for more information.
Solid Grounded AC Supply
3-Phase
AC Supply
Isolation
Transformer
Common DC Bus Configuration
Bus Supply Converter
Precharge
Bus
Cond
Cap
Bank
3-Phase
AC Supply
Isolation
Transformer
High-resistance Grounded AC Supply
Ground Fault
Detector and
Filter
Ungrounded AC Supply
3-Phase
AC Supply
Isolation
Transformer
Ground Fault
Detector and
Filter
Zig-Zag
Transformer
Precharge
PowerFlex 755TM
Regenerative Bus Supply
DC
Disconnect
AC Inverter
Common
Mode Cores
Cap
Module
Single
Dual
Kinetix 5700
Servo Inverters
AC Inverter
+DC
-DC
GFR
GFR
Ext
Module
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