GE Magne-Blast AM-13.8-1000-3H - Description of Operation

GEI
~
88766
4
,
Attach
test
coupler
to
circuit
breaker
and
operate
electrically
sev
-
eral
times
,
POWER
CHECK
51
.
I
Check
the
control
voltage
as
described
under
^
CONTROL
If
the
breaker
secondary
wiring
is
to
be
given
a
.
h
±
~
potential
NOTE
s
test
at
1500
volts
,
remove
both
the
motor
leads
from
the
terminal
connection
,
cause
damage
to
the
winding
insulation
.
Failure
to
disconnect
the
motor
from
the
circuit
may
5
.
Remove
the
test
coupler
and
replace
the
rear
,
side
,
and
inferpha
.
se
barriers
.
6
.
If
the
breaker
has
been
stored
for
a
long
period
of
time
,
it
is
recom
-
mended
that
the
insulation
be
checked
with
a
standard
60
cycle
high
potential
test
.
Refer
to
INSULATION
TEST
(
page
15
)
.
7
.
Lubricate
the
silver
portion
of
the
primary
disconnect
studs
by
rub
-
bing
a
small
amount
of
contact
lubricant
D
50
H
47
to
form
a
thin
coat
-
ing
on
the
ball
contact
.
8
.
Refer
to
metal
-
clad
instruction
book
GEH
-
1802
for
final
instructions
before
inserting
the
breaker
into
the
metal
-
clad
unit
.
DESCRIPTION
OF
OPERATION
The
magne
-
blast
breaker
is
composed
of
two
major
parts
,
the
breaker
ele
-
ment
and
the
operating
mechanism
.
The
breaker
element
comprises
three
similar
pole
units
,
each
pole
unit
consisting
of
main
and
arcing
'
con
-
tacts
,
an
interrupter
,
and
an
enclosing
box
barrier
that
segregates
the
interrupting
units
from
each
other
to
provide
insulation
between
phases
as
well
as
from
each
phase
to
ground
.
The
primary
connections
to
the
associated
metal
-
clad
equipment
are
made
through
the
primary
disconnect
studs
.
n
The
ML
-
13
operating
mechanism
shown
in
Figures
1
,
2
,
and
3
is
of
the
stored
energy
type
designed
to
give
high
speed
closing
and
opening
.
The
mechanism
will
operate
oh
a
-
c
or
d
-
c
voltage
as
indicated
on
the
breaker
nameplate
.
Closing
and
opening
operations
are
controlled
electrically
by
the
metal
-
clad
or
remote
relaying
,
and
mechanically
by
the
manual
close
and
trip
levers
on
the
breaker
.
All
secondary
connections
from
the
breaker
to
the
metal
-
clad
unit
are
made
through
the
coupler
(
1
)
Fig
.
1
.
A
positive
interlock
(
2
)
Fig
.
-
3
and
interlock
switch
(
2
)
Fig
.
1
are
pro
-
vided
between
the
breaker
and
metal
-
clad
unit
to
prevent
raising
or
lowering
of
the
breaker
in
the
unit
while
in
a
closed
position
and
to
prevent
a
closing
operation
when
the
breaker
is
not
in
either
the
fully
raised
or
lowered
position
.
A
,
plunger
can
also
be
provided
to
operate
an
additional
auxiliary
switch
mounted
in
the
metal
-
clad
unit
.
i
If
4
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