Rockwell Automation 2364E Non-Regenerative DC Bus Supply Unit (NRU) - Manual (Page 54)

Publication 2364E-5.01 April 2002
9-2 Installing Your NRU
Installation Procedure
1.
2. Remove the lifting angle (if present) that is secured to the top of
the NRU.
3. Plan where to punch holes for AC input entry. Refer to
Appendix C for top plate clearance information prior to punching
any holes.
4. Remove the top plate from the MCC.
5. Punch desired holes for AC input entry.
6. Connect top plate to NRU.
Note: Refer to Appendix C for additional wiring information and
for bus stab hole pattern details.
!
ATTENTION: To avoid the hazard of electrical
shock, verify that all voltages on the system bus network
have been discharged before attempting to service the
system.
ATTENTION: Be sure to obey all local electrical
codes when installing your drive system. This
installation procedure provides guidelines that can be
used in the case that codes do not exist.
If your system is
in:
Position and connect the NRU to the remainder
of drive lineup per drive system installation
procedures in:
Bulletin 2300 Publications 2100-5.5 and 2300-5.1.
FD86N enclosures Publications 2100-5.5 and S-3062.
If your NRU is
rated at: Connect the NRU input terminals to the AC
input power using:
180A DC
One conductor per phase. The input terminals
have a range of AWG #4 - 350 kcmil.
350A DC
Two conductors per phase. The input terminals
have a range of AWG #3/0 - 250 kcmil.
900A DC
Either a maximum of 4 wires or a bus connector
at the four-hole bus tab per phase.
1500A DC or
2000A DC Either a maximum of 8 wires or a bus connector
at both of the four-hole bus tabs per phase.
2500A DC or
3000A DC Either a maximum of 12 wires or a bus connector
at all 3 of the four-hole bus tabs per phase.