Rockwell Automation 20T PowerFlex Diode Bus Supply - Manual (Page 15)

Installation/Wiring 1-3
PowerFlex Diode Bus Supply User Manual
Publication 20T-UM001D-EN-P
AC Supply Source
Considerations The Diode Bus Supply is suitable for use on a circuit capable of delivering a
short circuit rating up to a maximum of 200,000 rms symmetrical amperes,
and a maximum of 600 volts.
If a Residual Current Detector (RCD) is used as a system ground fault
monitor, only Type B (adjustable) devices should be used to avoid nuisance
tripping.
Input Power Conditioning
Certain events on the power system supplying a bus supply can cause
component damage or shortened product life. These conditions include:
• 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 lightening strikes.
• The power source has frequent interruptions.
• The nearest supply transformer is larger than 1000 kVA.
If any or all of these conditions exist, it is recommended that the user install
a minimum amount of impedance between the Diode Bus Supply and the
source. This impedance could come from the supply transformer itself, the
cable between the transformer and Diode Bus Supply, or an additional
transformer or reactor.
Unbalanced or Non-Solid Grounded Distribution Systems
Where the potential exists for abnormally high phase-to-ground voltages (in
excess of 125% of nominal), or the supply system is non-solid grounded,
see the Wiring and Grounding Guidelines for Pulse Width Modulated
(PWM) AC Drives, publication
DRIVES-IN001 .
!
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: The Diode Bus Supply contains protective MOVs,
and input filter and common mode capacitors that are referenced to
ground. These devices should be disconnected from ground if the
Diode Bus Supply is installed on any non-solid grounded power
distribution system (IT-network). For jumper locations, see
Figure
1.2 on page 1-7 .