GE POWER/VAC GEK 86132A - Page 15

Refer
as
needed
to
sections
on
mechanical
and
electrical
adjustments
.
/
.
;
To
determine
contact
velocity
,
a
travel
recorder
and
oscillograph
are
required
.
Optional
travel
recorders
can
be
obtained
through
your
local
GE
Sales
Office
by
ordering
part
number
0144
D
123
SG
001
.
A
typical
travel
trace
and
inter
-
pretation
are
shown
in
Fig
.
18
.
Timing
may
be checked
by
monitoring
control
circuit
voltage
and
using
no
more
than
six volts
DC
and
one
ampere
through
the
vacuum
interrupter
contact
to
indicate
closed
or
open
condition
.
Typical
time
ranges
vary
with
coil
voltage
,
but
nominal
values
are :
Initiation
of
trip
signal
to
contact
parting
32
-
45
Milliseconds
2
Milliseconds maximum
pole spread
Initiation
of
close
signal
to
contact
closing
35
*
75
Milliseconds
2
Milliseconds maximum
pole
spread
.
Trip
-
free
operation
may
be
checked
by
applying
a
simul
-
taneous
close
and
trip
signal
,
and
a
minimum
reclose
opera
-
tion
may
be
checked
by
tripping
a
charged
breaker
open
while
maintaining
a
close
signal
.
Instantaneous
reclose
time
*
85
-
150
Milliseconds
.
Time
from
application
of
trip
signal
until
breaker
contacts
reclose
.
14
,
2
.
REPLACEMENT
OF
INTERRUPTER
ASSEMBLIES
Interrupters
are
supplied
in
complete
interrupter
assem
-
blies
which
include
the
vacuum
interrupter
mounted
in
the
interrupter
support
,
the
primary
studs
and
disconnect
fingers
.
CAUTION
:
DO
NOT
ATTEMPT
TO
REMOVE
OR
RE
-
*
INSERTTHE
VACUUM
INTERRUPTER
IN
THE
INTER
-
RUPTER
SUPPORT
ASSEMBLY
,
SPECIAL TOOLS
AV
-
AILABLE
ONLY
AT
THE
FACTORY
ARE
REQUIRED
,
1
.
Close
the
breaker
and
remove
the
coupling
clamp
,
(
8
,
Fig
,
8
)
.
Hold
hex
projection
(
6
,
Fig
,
8
)
at
the
bottom
of
the
operating
rod
insulator
with
a
one
inch wrench
and
loosen
the
adjacent
lock
nut
with
a
3
/
4
inch
wrench
.
Screw
down
the
lock
nut
and
the
operating
rod
insulator
until
clear
of
<
L
-
interrupter
rod
.
Remove
the
four
bolts
holding
the
poie
assembly
to
the
mechanism
and
remove
the
old
pote
,
,
assembly
.
2
.
Set
the
new
pole
assembly
in
place
and
install
the
four
mounting
bolts
.
Set
the
pole
assembly
so
that
the
distance
between
the
primary
studs
and
the
studs
on
the
adjacent
pole
are
ten
(
10
)
inohes
center
line
to
center
line
.
13
.
OPENING
AND
CLOSING
SPEED
The
opening
speed
is
modified
by
moving
the
speed
adjusting
nuts
on
the
opening
spring
assemblies
,
A
change
in
the
opening
speed
affects
the
closing
speed
.
Reference
Figure
3
,
Screw
the
operating
rod
insulator
up
to
mate
with
the
base
of
the
interrupter
rod
.
Install
coupling
clamp
.
Tighten
coupling
clamp
capscrews
,
then
loosen
them
1
-
2
tums
>
*
;
f
$
fgLr
a
.
With
continuity
indicator
across
the
contacts
,
back
off
the
operating
rod until the
contacts
separate
,
(
continuity
:
’
indicator
off
)
.
• •
b
.
Advance
operating
rod
until
contacts
touch
,
(
conti
-
16
.
The
operating
speeds
are
as
follows
:
Operation
Feet Per
Second
nuity
indicator
on
)
,
c
.
Advance
operating
rod
two
and
one
-
half
(
2
l
/
2
)
c
additional
turns
.
Open
Close
5.0
nominal
,
4
,
5
minimum
3.5
"
rtominal
,
4.0
maximum
d
.
Tighten
lock
nut
to
40
-
50
foot
pounds
and
the
coupling
clamp
capscrews
to
8
-
10
foot
pounds
e
.
Check
wipe
-
must
be
.
155
-
.
180
inch
(
set
all
three
phases
before
measuring
)
.
It
is
not
necessary
that
all
three
poles
have
the
same
wipe
measurement
as
long
as
all
three
poles
fall
within
the
specified
limits
.
f
.
Check
gap
-
must
be
.
545
-
.
600
inch
.
Adjust
if
needed
,
r
;
,
per
CONTACT
GAP
ADJUSTMENT
in
MECHANICAL
ADJUSTMENT
section
.
v
14
.
REPAIR
AND
REPLACEMENT
14.1
.
GENERAL
The
following
information
covers
in
detail
the
proper
method
of
removing
various
parts
of
the
breaker
in
order
to
make
any
necessary
repairs
.
This
section
includes
only
those
repairs
that
can
be
made
at
the
installation
site
on
parts
of
the
breaker
that
are
most
subject
to
damage
.
Important
:
Upon
completion
of
any
kind
of
repair
work
,
all
Interrupter
and
mechanism
adjustments
must
be
checked
.
4
.
If
new
interrupter
assembly
is
installed
,
check
and
adjust
the
erosion
indicator
(
4
,
Fig
,
7
)
by
bending
the
indicator
to
line
up
with
erosion
disk
.
:
/
\
l l
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