Drawout Breaker Interchangeability; Non-Interchangeability Hardware Arrangements; Slide Rail Rejection Pin Locations - GE AKR Series Maintenance Manual Supplement

Power Circuil Breakers,
GEI-86134
DRAWOUT
BREAKER
INTERCHANGEABILITY
In general,
drarvout
breakers
of the
same
type
and
rating are
interchangeable
in their
equipment
compartments ; drawout
breakers of
diJf er
ent
fr
ame
sizes
are not
interchangeable. To prevent inserting
the
wrong
type
breaker
into
a
drawout compartment,
suitable "rejection hardware"
is
a-ffixed
to
each
breaker
and
its
compartment. Figure
4
shows
a
typical
rejection bracket which aligns with
a re-
jection pin
in
the drawout
rail
(Fig.
3).
When the
wrong type breaker
is
inserted
into
a compartment
the bracket
and pin do not mate, preventing
the
breaker from seating
itself into the
drawout
rails.
There
is
one
exception
to the above.
Breakers
of
the same
frame size
having different short
cir-
cuit
ratings
may be interchanged
in
one direction
onlv:
a.
An AKR-3OH can be
inserted into
an
AKR-30
compartment.
b.
An
AKR-50H can be
inserted into
an AKR-50
compartment.
The rejection
hardware prevents the converse of
a.
and
b.
Figure
2
shows
the
rejection
pin
and bracket
combinations
employed. As determined by
its
in-
tended breaker
type,
each drawout
c
ompartment has
its rejection pin
(or
pins) installed
in
one
of three
positions
(A,
B
or
C
front-to-rear)
along the slide
rail(s)
.
Referring to Views 2
and
5, note that
only
the AKR-30H and
50H
types
employtwopins,
one
in
each
slide
rail.
The other breaker types use
a
single
pin
in
the right side
TaiL
AKRU-3O
ard
50
fused breakers use
a
single
bracket,
whereas
a-ll
nonfused
breakers
carry
two
brackets.
Use
Fig.
2
as
a
guide
for
determining
the proper
breaker
type(s) that
will
be accepted by
any given compart-
ment.
.f r(
ilil
ill
]l
ill ltl
ilt lll T-n-
AKR.30
o
sa1
'il_
tl
ttt ltl
ilr |ll
ll|
ilT
uu
AKR-3OH
(?
n^<
il
ltl
lrlr-
tl atl
tt ttl
T-T
AKRU.30
(c,
ffihffi
AKRT.50
@
II
TI
ffil--c
I neuecrroru
+-il1'-'
i"oJ'JT,rn
T----l;l*A
J
PosrrroNs
ffi
IN
AKRU -
50
(6)
Fig.
2.
Non-interchangeabi,lity (rej
ec
ti.on)
hardware arrangements
i.n
drawout
compartments
for breaker
Types
AKR -30/s0H/50/50H,
AKRT -50 and
AKRU-30/50
z
UJ
F-
F2
<x
o
n
v
-
PLAN
VIEWS -
KrtJn
I
sluE
RE.JECTION
PINS
IN
SLIDE
RAI
LS
R
IGHT
SLIDE
RAIL
REJECTION
BRACKETS
MOUNTED
ON
BREAK ER
Fig.
3.
Slide
rail
rejection pi.n
locations