ABB 5VHK 250 - Circuit Breaker Installation and Removal; Installing Front Cover; Installing Circuit Breaker into Compartment; Manual Operation of Electrically Operated Models

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AIWOWN
&
OWRI
clockwise
,
then
release
unlocking
lever
.
Continue
cranking
until
racking
mechanism
automatically
stops
at
TEST
"
position
.
With
the
circuit
breaker
racked
tp
“
TEST
position
,
it
should
be
checked
for
proper
operation
by
operating
all
possible
means
of
opening
and
closing
,
this
includes
control
switches
,
relays
,
etc
.
Turn
motor
disconnect
switch
(
1
.
fflg
.
3
)
to
"
ON
"
posltlontocharge
the
closing
springs
,
and
operate
the
breaker
as
required
.
Manual
Operation
Of
Electrically
Operated
Models
Electrically
operated
circuit
breakers
may
be
charged
manually
by
a
removable
maintenance
handle
for
bench
tests
or
smer
-
gency
operation
,
To
manually
charge
the
closing
springs
,
first
position
the
maintenance
handle
hooked
section
in
the
long
slo
;
on
the
pawl
carrier
(
Refer
to
Figure
3
)
.
The
small
tab
on
the
maintenance
handle
will
fit
the
ismall
hole
of
the
pawl
carrier
.
Using
a
pumping
motion
,
rotate
the
pawl
carrier
until
the
ratchet
wheel
no
longer
rotates
.
At
this
point
,
The
spring
charged
in
-
dicator
will
indicate
SPRINGS
CHARGED
.
The
dreuft
breaker
can
be
closed
manually
with
the
manual
close
lever
.
NOTE
;
Occasionally
the
motor
crank
atm
will
stop
in
a
position
that
will
not
allow
manual
spring
charging
.
Whan
this
happens
,
the
motor
-
.
crank
arm
must
be
rotated
manually
by
using
a
screwdriver
to
rotate
the
crank
arm
sufficiently
so
that
the
springs
may
then
be
manually
charged
with
the
maintenance
handle
.
Installing
Front
Cover
(
See
Fig
,
i
)
!
n
$
tailthe
assembly
and
fasten
with
four
lower
front
cover
screws
(
1
)
and
one
screw
(
7
)
on
each
side
.
Inside
the
from
cover
,
NOTE
:
It
i
$
recommended
that
a
dielectric
withstand
tost
bo
made
prior
to
putting
thlsor
any
type
vacuum
circuit
breaker
into
service
.
Rotor
to
Dielectric
Tests
,
In
the
Maintenance
,
Adjustments
and
Tests
section
of
this
bulletin
,
for
the
correct
test
procedure
.
When
racking
circuit
breaker
^
“
CONNECTED
*
position
.
Close
compartment
door
(
1
.
Fig
,
4
)
and
insert
racking
crank
U
,
Pig
.
4
through
sliding
panel
(
2
,
Fig
.
4
)
.
;
Push
unlocking
lever
(
3
,
Fig
,
4
)
to
left
and
turn
racking
crank
(
4
.
Fig
.
4
)
approximately
1
/
4
turn
clockwise
.
th
«
n
release
unlocking
lever
.
Continue
cranking
until
racking
mechanism
automatically
stops
at
"
CONNECTED
"
position
.
Fig
.
4
-
Method
of
Racking
Circuit
Breaker
Installing
circuit
Breaker
Into
Compartrrwnt
(
See
Figs
,
3
&
4
>
NOTE
:
CLOCKWISE
rotation
of
racking
crank
for
inserting
breaker
.
COUNTERCLOCKWISE
rotation
of
racking
crank
for
removal
of
breaker
.
i
Turn
motor
disconnect
switch
(
1
.
Fig
.
3
)
to
"
OFF
7
"
position
.
Engage
racking
crank
(
4
,
Fig
.
4
)
and
push
racking
unlocking
lover
(
3
)
to
left
,
then
rotate
racking
crank
counterclockwise
only
until
resistance
to
motion
is
felt
(
DO
NOT
FORCE
)
.
If
dosing
springs
were
left
In
the
‘
CHARGED
*
condition
,
they
will
aromatically
discharge
.
For
installing
the
circuit
breaker
into
the
tower
compartment
,
the
fifth
wheel
is
used
to
position
the
breaker
so
that
it
is
lined
up
with
the
switchgear
.
Engage
the
fifth
wheel
with
hole
(
2
Fig
,
3
)
.
A
lift
device
is
required
to
lift
and
position
the
breaker
for
installation
into
the
upper
compartment
.
Guide
and
push
circuit
breaker
Into
compartment
until
stopped
.
Again
engage
racking
crank
ana
rotate
clockwise
until
racking
mechanism
automatically
stops
at
’
’
DISCONNECT
*
position
.
(
Breaker
is
now
hold
captive
in
com
-
partment
.
)
To
rack
circuit
breaker
to
'
TEST
position
,
push
recking
unlocking
lever
(
3
.
Fig
,
4
)
to
left
,
rotate
racking
crank
approximately
1
/
4
turn
CAUTION
CAUTION
CAUTION
CAUTION
Do
net
attempt
to
raox
any
further
;
1
i
.
The
circuit
breaker
may
now
fee
put
in
service
and
operated
a
required
,
CIRCUIT
BREAKER
REMOVAL
(
See
Fig
.
4
)
To
remove
circuit
breaker
from
*
CONNECTED
“
position
,
openth
*
breaker
as
required
.
Open
sliding
door
(
2
)
in
front
compartment
door
<
i
)
.
Engag
racking
crank
(
4
)
and
push
racking
unlocking
lever
(
3
)
to
let
Ftotate
racking
crank
(
4
)
counterclockwise
approximately
L
turn
,
then
release
unlocking
lever
.
Continue
cranking
counter
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