Chapter 1
General Installation Information
AC Supply Source
Considerations
PowerFlex High Power drives are suitable for use on a circuit capable of
delivering up to a maximum of 200,000 rms symmetrical amperes, and a
maximum of 600 volts.
If a system ground fault monitor (RCD) is to be used, only Type B
(adjustable) devices should be used to avoid nuisance tripping.
Unbalanced or Ungrounded Distribution Systems
If phase to ground voltage will exceed 125% of normal line to line voltage
or the supply system is ungrounded, you must take specific steps during
installation.
Input Power Conditioning
All AC input drives include an internal line reactor.
Certain events on the power system supplying a drive can cause component
damage or shortened product life. These conditions 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.
!
ATTENTION: To guard against personal injury and/or
equipment damage caused by improper fusing or circuit breaker
selection, use only the recommended line fuses/circuit breakers
specified in Appendix A
.
!
ATTENTION: If you intend to operate a Frame 9 drive on an
ungrounded distribution system, you must order a non-CE
PowerFlex High Power drive.
If you are installing... refer to:
a Frame 9 drive Ungrounded and Unbalanced Installations on page 5-5
a Frame 10 drive Ungrounded and Unbalanced Installations on page 6-9
a Frame 11 drive Ungrounded and Unbalanced Installations on page 7-9
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