20 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Chapter 1 Installation/Wiring
Input Power Conditioning
The drive is suitable for direct connection to input power within the rated
voltage of the drive (see page 167
). Listed in the Input Power Conditions table
below are certain input power conditions which may cause component
damage or reduction in product life. If any of these conditions exist, install one
of the devices listed under the heading Corrective Action on the line side of the
drive.
General Grounding
Requirements
The drive Safety Ground - (PE) must be connected to system ground.
Ground impedance must conform to the requirements of national and local
industrial safety regulations and/or electrical codes. The integrity of all ground
connections should be periodically checked.
Typical Grounding
Ground Fault Monitoring
If a system ground fault monitor (RCD) is to be used, only Type B (adjustable)
devices should be used to avoid nuisance tripping.
IMPORTANT
Only one device per branch circuit is required. It should be mounted closest
to the branch and sized to handle the total current of the branch circuit.
Input Power Conditions
Input Power Condition Corrective Action
Low Line Impedance (less than 1% line reactance)
• Install Line Reactor
(1)
• or Isolation Transformer
(1) See Appendix B for accessory ordering information.
Greater than 120 kVA supply transformer
Line has power factor correction capacitors
• Install Line Reactor
(1)
• or Isolation Transformer
Line has frequent power interruptions
Line has intermittent noise spikes in excess of 6000V (lightning)
Phase to ground voltage exceeds 125% of normal line-to-line voltage
• Remove MOV jumper to ground.
• or Install Isolation Transformer with
grounded secondary if necessary.
Ungrounded distribution system
B-phase grounded distribution system
240V open delta configuration (stinger leg)
(2)
(2) For drives applied on an open delta with a middle phase grounded neutral system, the phase opposite the phase that is
tapped in the middle to the neutral or earth is referred to as the “stinger leg,” “high leg,” “red leg,” etc. This leg should be
identified throughout the system with red or orange tape on the wire at each connection point. The stinger leg should be
connected to the center Phase B on the reactor. See Bulletin 1321-3R Series Line Reactors
on page 183 for specific line
reactor part numbers.
• Install Line Reactor
(1)
SHLD
U/T1
V/T2
W/T3
R/L1
S/L2
T/L3
Esc
Sel
To Next Page
Loading...
Need help?
General
