SAG582127000
System Application Guide
Issue AF, February 26, 2014
Spec. No. 582127000 (Model 721
NPBB
)
Page 40 of 125
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
List DD: -48V/+24V Distribution Panel,
(5) -48V Bullet/TPS/TLS Circuit Breaker/Fuse Positions (with Return Busbar) and
(16) +24V Bullet/TPS/TLS Circuit Breaker/Fuse Positions (with Return Busbar)
Features
♦
(5) -48V Load Distribution Fuse / Circuit Breaker Mounting Positions:
(16) +24V Load Distribution Fuse / Circuit Breaker Mounting Positions:
3A to 100A TPS/TLS Type Fuses,
1A to 250A Bullet Nose Type Circuit Breakers.
♦
Includes a Return Busbar.
♦
600A Maximum Total Capacity:
320A Maximum -48V Distribution Capacity.
500A M24V Distribution Capacity.
Restrictions
Cannot be used in a supplemental bay.
Limit two (2) dual voltage distribution panels (List DA, DB, DC, or DD) per power system. If two dual voltage
distribution panels are ordered, they must be mounted in adjacent rows and must be the same List Number.
Can be installed in rows 1 to 2 of a 1-, 2-, 3-, or 4-row distribution cabinet.
Unless otherwise specified fuses and/or circuit breakers are mounted from left to right, starting with the
highest capacity and working to the lowest capacity.
125A, 150A, 175A, and 200A circuit breakers occupy two mounting positions.
225A and 250A circuit breakers occupy three mounting positions.
Caution: A circuit breaker or fuse with a rating of 100A or greater SHALL HAVE an empty mounting
position between it and any other overcurrent protective device.
Maximum lug width, 0.625 inches.
Ordering Notes
1) Specify row for panel location(s).
2) Order low voltage load disconnect List LL (for 24V positions) as required.
3) Order circuit breakers as required per
4) Order fuses as required per
. Also order one (1) P/N 117201 bullet nose type fuseholder per
fuse ordered. Order replacement alarm fuses (18/100A) per
5) Order 6-position GMT fuse block P/N 550224 and fuses per
6) Order load lugs (two hole, 1/4” bolt clearance hole, 5/8” centers) as required for each distribution position
7) Order lug hardware kit (P/N 541084) as required. Lug hardware kit provides thirty-two (32) sets of 1/4-20
hardware (nuts, flat washers, and lock washers), enough for sixteen (16) lug landing points.
Load
Connections
-48V
Distribution
+24V Distr
ibution
Load Return
Connections
LOAD AND LOAD RETURN CONNECTIONS
1/4-20 Studs on 5/8” Centers
(Customer must supply
or order additional
hardware)
Maximum Lug Width:
0.625 inches.
