Accessories
Mechanical Interlocks ("Walking Beam")
For Stationary Breakers
Mechanical interlocks are mechanical devices used to
prevent two adjacent circuit breakers from both being in
the "ON" or closed position at the same t1me. The Interlock
permits both breakers to be in the "OFF" position or open
position while a l lowing either or both to be cha rged.
Table
33.1
Mechanical Interlocks
Maximum Current Envelope
Size Rating (Amps)
2000
3000
4000
Catalog Number
SPWB20
SPWB30
SPWB40
lug Kits
.
Lug kits accept copper and aluminum wire and a re su1table
for direct mounting to the breaker, except in the case of
TSLUG kits, T-studs must also be used.
Table
33.2
Lug Kits
Circuit
Max
Breaker
Rating
Frame Size
(Amps)
(Amps)
400
600
800
800
800
1600
1600
2000
2000
800
1200
30000
1600
2000
2500
3000
4000
4000
CD For
use with adapter kit only.
0
#2 AWG-600 kcmil Cu/ AI.
<Jl
300-750 kcmil Cu/AI.
@)
#3/0 AWG - 800 kcmil Cu/ AI.
C3)
500-800 Kcmil Cu/ AI.
®
3/0- 800 kcmil Cu/AI.
Catalog
Lugs
Number
Per
Kit
TPLUG106
1
TPLUG206
1
TPLUG308
1
TPLUG108CD
1
TPLUG408
1
TPLUG108CD
1
TPLUG108CD
1
TSLUG08
9
TSLUG 12
12
TSLUG16
15
TSLUG20
18
TSLUG25
21
TSLUG30
27
TSLUG40
33
(J)
For back connected 3000A:
T-Stud
integral
with
breaker.
Max.
Wire
Cables
Range
Per
(Footnote)
Pole
1
0
2
3
<J)
3
®
4
C3)
6
®
6
®
3
®
4
®
5
®
6
®
7
®
9
®
1 1
®
Additional Accessories - Drawout
Breakers Substructures
Su bstructures are availa ble for both standard and Hi-Break®
Power Break® I I breakers. Holes are provided for bolting on
a shelf or supports. Holes are also provided in the primary
stabs for bolting to busbars or terminal lugs. A special speed
wrench-style racking tool is provided for racking a breaker in
and out of the substructure.
Table
33.3
Substructures
Circuit Breaker
Frame Size (Amps)
800
1600
2000
2500
3000
4000
Standard Break
Hi-Break
Catalog Number
Catalog Number
SPSDOSOS
SPHDOS08
SPSDOS16
SPHDOS16
SPSDOS20
SPHDOS20
SPSDOS25
SPHDOS25
SPSDOS30
SPHDOS30
SPSDOS40
SPH DOS40
33
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