Application Guide

Installation Instructions Section 5876
Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B) Issue AT, April 26, 2013
Chapter 4. Making Electrical Connections Page 4-47
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Dual AC Input Feed
Five Rectifier mounting positions are internally bused to AC input branch circuit #1, and
the remaining five Rectifier mounting positions are internally bused to AC input branch
circuit #2. An AC input circuit breaker is provided for each Rectifier mounting position.
1) Remove the rear upper cover panel from the PDSC. To do so: Loosen the four
screws that secure each cover panel. Lift the cover panel until the screw heads
clear the keyhole slots. Remove the cover panel.
Procedure
2) Remove the linking busbar from the terminal designated "Feed 1 Phase A" and
“Feed 2 Phase A”. The busbar is not used in dual feed applications.
3) Remove the linking busbar from the terminal designated "Feed 1 Phase B" and
“Feed 2 Phase B”. The busbar is not used in dual feed applications.
4) Remove the linking busbar from the terminal designated "Feed 1 Phase C" and
“Feed 2 Phase C”. The busbar is not used in dual feed applications.
5) Feed 1: Refer to Figure 4-17 and locate the Rectifier AC input busbars for Feed
#1. These busbars are equipped with 3/8-16 studs on 1 inch centers. Attach
Rectifier AC input leads to these using customer supplied two-hole lugs. When
lugs are secured using 3/8 inch hardware; recommended torque is 180 in-lbs
when a Belleville lock washer is used, and 300 in-lbs when a standard flat
washer and lock washer are used.
Connect Phase A to the terminal designated "A". Connect Phase B to the
terminal designated "B". Connect Phase C to the terminal designated "C".
Feed 2: Refer to Figure 4-17 and locate the Rectifier AC input busbars for Feed
#2. These busbars are equipped with 3/8-16 studs on 1 inch centers. Attach
Rectifier AC input leads to these using customer supplied two-hole lugs. When
lugs are secured using 3/8 inch hardware; recommended torque is 180 in-lbs
when a Belleville lock washer is used, and 300 in-lbs when a standard flat
washer and lock washer are used.
Connect Phase A to the terminal designated "A". Connect Phase B to the
terminal designated "B". Connect Phase C to the terminal designated "C".
6) Equipment grounding conductors must be provided with the AC input conductors
supplied to each bay. Connect to earth ground, not power system neutral.
Refer to Figure 4-17 and locate the Rectifier AC input frame ground nuts (3/8-16
nuts on 1 inch centers for securing lugs and lug mounting hardware). Attach
Rectifier AC input ground leads to these nuts using customer supplied two-hole
lugs. When lugs are secured using 3/8 inch hardware; recommended torque is
180 in-lbs when a Belleville lock washer is used, and 300 in-lbs when a standard
flat washer and lock washer are used.
7) Replace the rear upper cover panel to the PDSC. To do so: Place the keyhole
slots in the cover panel over the screws in the PDSC, slide the cover panel down
and secure by tightening the screws. Use the supplied grounding washers at the
top left and bottom right locations.