ABB 5HK Series User Manual

IB
6.2
.
1.7
D
Page
4
A
»
11
MIPIP
ASEA
BROWN
BOVERI
3.4
REMOVING ARC
CHUTES
(
See
Figure
1
)
For
5
FIK
75
,
150
and
250
,
remove
nut
(
6
)
and
gently
disconnect
return
connection
(
5
)
.
Grasp
the
arc
chute
(
I
)
at
the
front
and
top
and
gently
tilt
on
its
pivot
towards the
rear
until
it
rests
on
the lead
support
molding
(
2
)
.
If
other than
visual
inspection
is
to
be done
,
the
arc
chute
,
in
the tilted
position
,
should be
lifted
straight
out
of
the
pivot
guide
slots
and
fingers
and removed
from
the circuit breaker
.
For
5
HK
350
,
remove
nut
(
6
)
and
gently
disconnect
return
connection
(
5
)
.
Remove bolt
connecting
the
front
leg
of
the
arc
chute
to
the block
on
the base sheet
of
the
circuit
breaker
.
Attach the
accessory
lifting
bracket
to
the tie bar
bushing
at
the
top
front
of
the
arc
chute
and
slowly
raise
the
arc
chute
as
required
by
means
of
a
hoist
.
It
will
pivot
at
its
terminal connection and then should be
guided straight
out
of
the
pivot
guide
slot and
fingers
and removed
away
from
the circuit breaker
.
If
only
a
visual
examination
is
to
be
made
,
each
arc
chute
may
be
tilted back
gently
,
hand held
and
then
slowly
lowered
.
3.5
ARC CHUTE EXAMINATION
Examine
arc
chutes
carefully
before
placing
into
service
.
Look
for
any
breakage
to
liner
plates
and
arc
chute
plates
.
Check
for
presence
of
any
foreign
particles
such
as
chips
of
ceramic and metal
.
Inspect
exterior
for
any
damage
or
deformation
.
The
polyester glass moldings
occasionally
have
some
small cracks
develop
in
resin
-
rich
areas
,
but
these cracks do
not
indicate
defective
material
and
should
not
cause
concern
.
3.6
INSULATION STRUCTURE
All
insulated
parts
should be checked
for
damage
.
Any
dust
or
dirt should
be removed
by
compressed
air
or
wiped
with
a
clean
,
lint
-
free
cloth
saturated
with
an
oil
-
free
solvent
.
This is
important
because the
soot
or
dirt
can
accumulate
and
,
with
moisture
,
place
the circuit
breaker
in
jeopardy
,
dielectrically
.
The
lead
support
moldings
are
polyester
glass
and
occasionally
have
some
resin
-
rich cracks
or
crazing
develop
,
but
these
do
not
indicate
defective
mate
-
rial
and should
not
cause concern
.
CAUTION CAUTION CAUTION
CAUTION
3.7
MANUAL
SLOW
-
CLOSE
TO CHECK CONTACT
PRESSURE
(
Figure
2
)
NOTE
:
Ensure that accessories that
affect
electrical
/
me
-
chanical
operation
are
set
in
their
operating
positions
:
i
.
e
.
,
undervoltage
devices should be
energized
or
mechanically
closed
;
mechanical interlocks
,
key
or
other
,
should be
properly
set
,
etc
.
1
.
Turn
racking
screw
clockwise
approximately
two
to
three
turns
until the
racking
-
unlocking
lever
snaps
into
the
first
position
corresponding
to
the
“
DISCONNECT
”
position
.
2
.
Engage
manual
charge
handle
(
8
)
with
charging
lever
(
3
)
.
Pump
charging
lever
until
breakerclosing
springs
snap
into
charge
position
,
then
remove
handle
.
3
.
Insert
BOTH
tangs
of
spring
retainer bracket
(
7
)
into
holes
of
closing spring guides
(
2
)
.
4
Pull manual close lever
(
4
)
to
discharge
closing
springs
onto
tangs
of
spring
retainer bracket
(
7
)
.
At
this time
the
contacts
will
partially
close
.
5
.
Re
-
engage
manual
charge
handle
(
8
)
with
charging
lever
(
3
)
,
then
slowly
pump
to
slow
-
close breaker
contacts
.
Check
contact
pressure
as
listed
in
paragraph
5.2
.
Use the
manual
trip
button
(
6
)
to
open
the breaker
.
6
.
To
remove
spring
retainer
bracket
(
7
)
from
circuit
breaker
,
continue
pumping
until
closing springs
are
again
heard
to
snap
into
fully
-
charged
position
.
Spring
retainer bracket
can now
be
removed
.
7
.
Discharge
closing springs
by
pulling
manual close lever
(
4
)
and
pushing
manual
trip
button
(
6
)
at
the
same
time
to
effect
trip
-
free
operation
.
(
The breaker
can
also be
closed
first
and then
tripped
.
)
BE
SURE
RETURN
CONNECTION
IS CLEAR
AND
DOES
NOT
CATCH
ON
THE
ARC
CHUTE
.
ALSO
BLOCK
WHEELS
TO
PREVENT BREAKER
FROM
ROLLING
.
)
Fig
.
1
-
View
Showing
Chute
and
Contact Structure
Courtesy of NationalSwitchgear.com

ABB 5HK Series Specifications

General

Brand	ABB
Model	5HK Series
Category	Circuit breakers
Language	English