SAG581126000
System Application Guide
Issue AD, November 23, 2009
Spec. No. 581126000 (Model 700
NVBA
)
Page 58 of 123
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List KA: Distribution Bus Module (Part No. 520507)
(4) +24V Fuse/Circuit Breaker System Positions and
(16) –48V Fuse/Circuit Breaker Subsystem Positions
Features
♦
Dual Voltage Distribution (+24V and -48V)
♦
320A M24V System bus capacity, 480A Maximum –48V Subsystem bus capacity.
♦
(4) Load Distribution Fuse / Circuit Breaker Mounting Positions (+24V System Voltage) (3 to 100A
TPS/TLS-Type Fuses / 1 to 250A Bullet Nose Type Circuit Breakers.
♦
(16) Load Distribution Fuse / Circuit Breaker Mounting Positions (-48V Subsystem Voltage) (3 to 100A
TPS/TLS-Type Fuses / 1 to 250A Bullet Nose Type Circuit Breakers, or accepts “
Fuse Block Assembly Kit (P/N 514432)
”.
Restrictions
Limit one dual voltage bus (List
,
) per power system.
Must be installed in Main Bay (
)
only
.
Must be installed in bus position A (row 1) of a 1-, 2-, 3- or 4-bus row 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, and 200A circuit breakers occupy two mounting positions. 250A circuit breakers occupy three
mounting positions.
Caution: A circuit breaker or fuse with a rating greater than 150 amperes SHALL HAVE an empty
mounting position between it and any other overcurrent protective device.
Maximum size of wire to be connected to a single fuseholder or circuit breaker position is 2 AWG.
Ordering Notes
1) Order circuit breakers as required per
2) Order fuses as required per
Also order one (1) P/N 117201 bullet nose-type fuseholder per fuse ordered.
3) Order load lugs (two hole, 1/4” bolt clearance hole, 5/8” centers) as required for each distribution position
per Table
.
4) Order lug hardware kit,
as required. Kit provides all hardware required to connect load and
ground lugs for four (4) positions of a bullet nose-type distribution assembly.
-48V INPUT
(Factory Connection)
1/4-20 STUD, 48 PLACES
(CUSTOMER MUST SUPPLY ADDITIONAL HARDWARE)
GROUND
BUSBAR
LOAD RETURN
CONNECTIONS
5/8"
1/4-20 THREADED HOLE, 40 PLACES
(CUSTOMER MUST SUPPLY LUG BOLTS
AND ADDITIONAL HARDWARE. BOLT
LENGTH: 3/4")
5/8"
3/4"
+24V LOAD
CONNECTIONS
(SYSTEM)
-48V LOAD
CONNECTIONS
(SUBSYSTEM)
-48V LOADS (SUBSYSTEM)
+24V LOADS
(SYSTEM)
