Rockwell Automation Publication MOTION-AT007A-EN-P - May 2020 19
Non-regenerative Common DC-bus Configurations Chapter 2
General Considerations
This section includes information on AC line impedance, disconnect switch connections, and ground screw/jumper settings, depending on
the drive family.
• All system components (bus supply and PowerFlex or Kinetix drives) must be selected for the same AC-line voltage.
• Low-inductance type DC-bus must be used. See DC-bus Connections
on page 8 for details.
• To be used in a common-bus system with a Kinetix 5700 bus supply, the Kinetix 6000 or Kinetix 6200/6500 drive systems must be
configured as common-bus follower (internal IGBT for shunting is disabled).
•Refer to Additional Resources
on page 81 for user documentation with the maximum motor cable length requirements of the drives
specific to your application.
AC Line Impedance Considerations
In the following use cases, an additional transformer or line reactor is required due to faults or potential damage associated with AC line
disturbances:
• Installation site has switched power-factor correction capacitors.
• Installation site has lightning strikes or voltage spikes in excess of 6000V peak.
• Installation site has power interruptions or voltage dips in excess of 200V AC.
• The transformer kVA is more than 10 times larger than the drive kVA or the percent source impedance relative to each converter is
less than 0.5%.
In the following use cases, a line reactor is required due to faults associated with sharing AC line-input on multiple converters:
• Repetitive AC input line-voltage notching is present. For example, if silicon-controlled rectifier drive is connected to the same AC
input power source.
•Powering 2198-Pxxx DC-bus power supply and 2198-RPxxx regenerative bus supply from the same AC input-power source.
- Line reactor in the AC input-power string is not required for the DC-bus power supply in this use case, but is recommended for the
prevention of issues caused by other use cases.
• Powering two or three 2198-P208 DC-bus power supplies from the same AC input-power source that share the same DC-bus.
- In this use case, a line reactor is required for each 2198-P208 DC-bus power supply to make sure that they share current more
evenly.
Refer to Kinetix 5700 Servo Drives User Manual, publication 2198-UM002
, for additional AC line impedance considerations.
ATTENTION: The incorrect use or configuration of third-party assemblies can result in reduced system reliability and drive damage.
IMPORTANT Do not include the 2094-BSP2 shunt module on the 2094 power rail.
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