Rockwell Automation Allen-Bradley Kinetix 5700 - Page 45

Rockwell Automation Publication 2198-UM002L-EN-P - October 2021 45
Chapter 2 Plan the Kinetix 5700 Drive System Installation
See Power Wiring Examples on page 321 for AC input-power interconnect
diagrams. For Bulletin 1321 line reactor specifications, see the 1321 Power
Conditioning Products Technical Data, publication 1321-TD001
.
EXAMPLE
The DC-bus power supply or regenerative bus supply is rated 1 Hp, 480V,
2.7 A input.
The supply transformer is rated 50,000 VA (50 kVA), 5% impedance.
The percent (%) impedance has to be in per unit (5% becomes 0.05) for
the formula.
0.22% is less than 0.5%. Therefore, this transformer is too large for the
DC-bus power supply or regenerative bus supply. Consider adding either
a line reactor or isolation transformer.
Z
drive
=
V
line-line
3 • I
input-rating
480V
3 • 2.7
= = 102.6 Ohms
Z
xfmr
=
(V
line-line
)
2
VA
480
2
50,000
• % Impedance =
•
0.05 = 0.2304 Ohms
Z
xfmr
Z
drive
0.2304
102.6
= 0.00224 = 0.22%
=
Table 8 - Bulletin 1321 Line Reactor Selection
Kinetix 5700
Power Supply
Power Supply
Cat. No.
Number of Power Supplies
in a Bus Group
Bulletin 1321 Line Reactor
Cat. No.
Status
DC-bus Power Supply
2198-P031 1 1321-3R12-B Recommended
2198-P070 1 1321-3R35-B Recommended
2198-P141 1 1321-3R55-B Recommended
2198-P208
1
1321-3R80-B
Recommended
2Required
3Required
Regenerative Bus Supply
2198-RP088 1 1321-3R35-A Recommended
2198-RP200 1 1321-3R100-A Recommended
2198-RP263 1 1321-3R160-B Recommended
2198-RP312 1 1321-3R200-A Recommended
IMPORTANT
You can group multiple 2198-Pxxx DC-bus power supplies on one line
reactor if they do not share same DC bus. However, the line reactor
percent impedance must be large enough when evaluated for each
DC-bus power supply separately, not evaluated for all loads connected at
once.