Rockwell Automation Allen-Bradley PowerFlex 40 Guia De Inicio Rapido página 9

Input Power Conditions
Input Power Condition
Low Line Impedance (less than 1% line reactance) • Install Line Reactor
Greater than 120 kVA supply transformer
Line has power factor correction capacitors
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
Ungrounded distribution system
240V open delta configuration (stinger leg)
(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. Refer to the
PowerFlex 40 User Manual for specific line reactor part numbers.
(2)
Refer to Appendix B of the PowerFlex 40 User Manual for accessory ordering
information.
I/O Wiring Recommendations
(4)
Wire Type(s)
Belden 8760/9460
(or equiv.)
Belden 8770
(or equiv.)
(3)
If the wires are short and contained within a cabinet which has no sensitive circuits,
the use of shielded wire may not be necessary, but is always recommended.
(4)
Stranded or solid wire.
I/O Terminal Block Specifications
Frame Maximum Wire Size
2
B & C 1.3 mm (16 AWG)
(5)
Maximum / minimum that the terminal block will accept - these are not
recommendations.
Refer to the PowerFlex 40 User Manual for recommendations on
maximum power and control cable length.
(1)
Description
2 0.8 mm (18AWG), twisted pair, 100% shield
with drain.
2
0.8 mm (18AWG), 3 conductor, shielded for
remote pot only.
(5)
Minimum Wire Size
2
0.2 mm
Corrective Action
• or Isolation Transformer
• or Bus Inductor – 5.5-11 kW
(7.5-15 HP) drives only
• Install Line Reactor
• or Isolation Transformer
• Remove MOV jumper to ground.
• or Install Isolation Transformer
with grounded secondary if
necessary.
• Install Line Reactor
(3)
Minimum Insulation
Rating
300V
60 degrees C
(140 degrees F)
(5)
Torque
(24 AWG) 0.5-0.8 N-m (4.4-7 lb.-in.)
English-7
(2)