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PowerFlex 700L Technical Data

14 Publication 20L-TD001A

Installation Considerations

Power Wiring

The PowerFlex 700L has the following built in protective features to help simplify installation:

• Ground fault protection during start up and running ensures reliable operation

• Electronic motor overload protection increases motor life

AC Supply Source Considerations

PowerFlex 700L Liquid-Cooled AC drives are suitable for use on a circuit capable of delivering up to a maximum of

200,000 rms symmetrical amperes.

PowerFlex 700L Liquid Cooled AC drives should not be used on undersized or high-impedance supply systems. The

supply system kVA should be equal to or greater than the drive-rated kW, and the system impedance should be less than

10%. Operation outside these limits could cause instability resulting in drive shutdown.

PowerFlex 700L Liquid Cooled AC drives have a built-in LCL filter which includes a 3% input line reactor. Additional

input line reactors are not recommended.

Unbalanced, Ungrounded or Resistive Grounded Distribution Systems

Removable MOV to ground and common mode capacitors to ground ensure compatibility with ungrounded systems.

These devices must be disconnected if the drive is installed on a resistive grounded distribution system, an ungrounded

distribution system, or a B phase grounded distribution system. These devices must also be disconnected if a regenerative

unit is used as a bus supply or brake.

Input Power Conditioning

Certain events on the power system supplying a drive can cause component damage or shortened product life. They are:

• The power system has power factor correction capacitors switched in and out of the system, either by the user or by the

power company.

• The power source has intermittent voltage spikes in excess of 6000 volts. These spikes could be caused by other

equipment on the line or by events such as lightning strikes.

• The power source has frequent interruptions.

There are many other factors that must be considered for optimal performance in any given application. The block

diagram below highlights the primary installation considerations. For detailed recommendations on input power

conditioning, reflected wave protection, and motor cable types, refer to Wiring and Grounding Guidelines for AC Drives

(publication DRIVES-IN001) available online at www.rockwellautomation.com/literature

EMC Requirements

The 700VC control option for Frame 2 comes with two common mode chokes — one for input and one for output. The

700S control option for Frame 2 requires a field-installed kit SK-L1-CHK2-F2. See the PowerFlex 700L User Manual

(publication 20L-UM001) for other CE requirements. PowerFlex 700L Frame 3A and 3B drives do not require common

mode chokes for CE compliance.

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