Rockwell Automation Publication 520-TD002A-EN-E - May 2015 19
PowerFlex 527 AC Drive Specifications
Jumper Location (Typical)
Phase to Ground MOV Removal
Input Power Conditioning
The drive is suitable for direct connection to input power within the rated voltage of the drive (see Input Power Conditions
on page 19). 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.
Input Power Conditions
(1) 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 35 for specific line reactor part numbers.
(2) See Accessories and Dimensions
on page 31 for accessory ordering information.
Tighten screw after jumper removal.
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 Condition Corrective Action
Low Line Impedance (less than 1% line reactance) • Install Line Reactor
(2)
• or Isolation Transformer
Greater than 120 kVA supply transformer
Line has power factor correction capacitors • Install Line Reactor
(2)
• 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
240V open delta configuration (stinger leg)
(1)
• Install Line Reactor
(2)
R/L1
S/L2
T/L3
1234
Three-Phase
AC Input
Jumper
To Next Page
Loading...
Need help?
General
