Rockwell Automation 2364E Non-Regenerative DC Bus Supply Unit (NRU) - Manual (Page 84)

Publication 2364E-5.01 April 2002
C-4 NRU Details
AC Input Customer Connection
Details The type of AC input connection depends upon the NRU current
rating.
Table C: AC Input Customer Connection Details
Figure 5
AC Input Customer Connection Bus in 900, 1500, 2000, 2500, and 3000A DC
NRUs
DC Bus Current
(A DC)
NRU Current
Code
Type of AC Input Connection
Typical AC Input Wire Sizing
(per Phase) Based on 125% of
Rated Load and 75ºC wiring
180 A
Terminals accommodating
AWG 4 through 350 kcmil.
One AWG 3/0
350 B
Terminals accommodating
AWG 3/0 through 350 kcmil. · One AWG 500 kcmil or
· Two AWG 3/0
900 C
One bus stub per phase. See
Figure 5. · Three AWG 350 kcmil or
· Four AWG 4/0
1500 D
Two bus stubs per phase. See
Figure 5. · Five AWG 350 kcmil or
· Six AWG 250 kcmil
2000 E
Two bus stubs per phase. See
Figure 5.
· Five AWG 350 kcmil,
· Six AWG 250 kcmil, or
· Seven AWG 250 kcmil
2500 F
Three bus stubs per phase.
See Figure 5. · Seven AWG 500 kcmil or
· Eight AWG 400 kcmil
3000 G
Three bus stubs per phase.
See Figure 5.
· Eight AWG 500 kcmil
0.563 Diameter
TYP
1.844
1.750
0.83
0.88
0.250