ABB 5HK Series User Manual

A
IK I
!
MINK
IB
6.2
.
1.7
D
Page
9
ASEA
BROWN
BOVERI
5.8
ARC
CHUTES
The
arc
chutes
should be
inspected
internally
to
ensure
that
no
breakaqe
occurred
to
liner
plates
or
arc
plates
.
Further
,
there
may
be
a
crust
formed
on
the
liner
plates
if
load
current
interruptions
were
close
to
the
continuous
current
rating
of
the breaker
,
or
moderate
faults
were
interrupted
.
This
crust
should be removed
by
carefully
using
a
carbo
-
rundum
stone
or
scraper
.
The
arc
chute should then be
blown
out
with
compressed
air
to
remove
the resultant
dust
and
particles
.
After
400
%
accumulated
current
or
major
interruptions
occur
,
the
circuit
breaker
should be
inspected
immediately
.
All
maintenance
checks
or
tests
noted above should be
carried
out
,
plus
close examination
of
the
arc
chute
.
Arc
plate
and liner
plate
breakage
should be
carefully
looked
for
,
along
with
excessive
erosion
of
the
arc
plates
.
Arc
plates
are
made
of
ceramic material
and
perform
the
function of
extracting
heat
from
the
arc
as
it
is
beinq
forced
into
and
elongated
by
them
.
The
leading edges
become
coated
with
glass
that
comes
to
the
surface from
the
extreme
heat
.
Direct
measure
of
use
is the
amount
of
glass
beads evident
.
When
the entire
leading edge
and
portions
of
the
flat
arc
plate
are
heavily
encrusted
with
glass
beads
,
the
arc
chute
should be
replaced
.
It
should be noted
that this condition
will
vary
between
arc
chutes
on
the
same
breaker because
of
single
-
phase
fault
and
asymmetrical
current
incidences
.
5.6
BRIDGE PIVOT
PRESSURE
(
See
Figure
4
)
Bridge
pivot
pressure
should be
adjusted
only
when
the
millivolt
drop
test
indicates
a
problem
.
When
adjustment
is
necessary
,
adjust
as
follows
:
1
.
Locking
bolt
(
2
)
should be loosened
on
solid
pushrod
models
.
Springloaded
pushrod
models do
not
require
dis
-
connecting
.
2
.
Bridge
(
I
)
should be
disconnected
from
adjusting
stud
(
3
)
on
solid
pushrod
models
.
3
.
Loosen
one
set
screw
(
6
)
in
one
pivot
nut
-
either side
.
4
.
Tighten
bridge
pivot
nut
(
5
or
7
)
securely
(
approximately
75
ft
.
lbs
.
)
.
Then
gradually
backup
pivot
nut
(
approximately
1
/
2
to
1
-
1
/
2
flats
until
bridge
motion is
just
free
when
bridge
is
moved
by
hand
.
On
spring
-
loaded
pushrod
models
,
lift
bridge
against spring
and then
slowly
release
,
ensuring
that
it
resets
freely
.
5
.
Tighten
set
screw
(
6
)
in
nut
that
was
loosened
,
reconnect
adjusting
stud
,
if
disconnected
,
and
readjust
contact
pres
-
sure as
described
in
Paragraph
5.2
.
5.7
CLOSING
AND
OPENING
TIMES
After
operation
intervals
noted
previously
or
a
chanqe
in
bridge
pivot
adjustment
,
it
is
recommended
that
opening
and
closing
times
be checked
by
use
of
a
cycle
counter
,
time
-
travel
analyzer
,
'
oscillograph
,
etc
.
,
to
monitorthe time
from
energizing
to
arcing
contact
touch
or
part
.
*
For
measuring
circuit breaker
speeds
,
analyzer
mounting
support
and
instructions
are
available
on
special
order
.
Circuit
breaker
closing
and
opening
times should be
within
the
following
time
ranges
for
normal
operation
.
5.9
OPERATING
MECHANISM
(
See
Figure
5
)
The
operating
mechanism is
adjusted
at
the
factory
for
proper
operation
and
should
not
be disturbed
unless the
circuit
breaker does
not
close
electrically
on
reclosing duty
.
This condition is
caused
when the
latch check
switch
(
2
)
at
right
side
of
breaker
(
when used
)
is
not
actuated
.
Circuit
breaker should
not
close
before
trip
latch
(
4
)
has
reset
.
Latch
-
check switch
adjustments
made
with
latch
(
4
)
against
stop
pin
(
3
)
:
1
.
Turn
in
adjusting
screw
(
1
)
until
contacts
of
switch
(
2
)
“
break
”
as
indicated
by
an
audible click
or
check
with
bell
ringer
.
2
.
Retract
adjusting
screw
until
switch
contacts
“
make
’
'
.
3
Rotate
adjusting
screw
one
turn
more
.
(
Adjustment
screw
is
self
-
locking
.
)
Opening
Time
Range
-
MS
**
Closing
Time
Range
-
MS
* *
5
HK
75
,
5
HK
150
,
5
HK
250
1200
Ampere
5
HK
150
and
5
HK
250
2000
Ampere
5
HK
350
,
1200
and
2000
3000
Ampere
50
-
90
23
-
35
60
-
95
23
-
35
50
-
90
65
-
95
23
-
35
23
-
35
* *
At
125
Vdc
-
times
at
other
voltages
may vary
slightly
.
NOTE
:
5
HK
250
,
80
/
kA
/
hiqh
momentary
,
same as
5
HK
350
,
1200
and
2000
Ampere
,
in
table
above
.
NOTE
:
Below
0
°
C
,
the
closing
times
will
increase
(
but
with
no
reduction
in
closing
force
)
;
and
opening
times
will
be
within
the limits
.
Adjustments
to correct
speeds
,
if
found
to
be
outside limits
,
are
critical and the
nearest
district
office
should be contacted
for
recommendations
.
Courtesy of NationalSwitchgear.com

ABB 5HK Series Specifications

General

Brand	ABB
Model	5HK Series
Category	Circuit breakers
Language	English