ABB VHK-R User Manual

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7
ASEA
BROWN
BOVERI
Latch
Engagement
(
Bite
) (
Refer
to
Fig
.
4
)
The circuit
breaker
closing
and
opening
times should be
within
the
following
time
ranges
for
normal
operation
.
The latch
engagement
adjusting
screw
(
3
)
is
located
to
the
right
of
the
right
-
hand
mechanism
housing
(
1
)
.
It
can
be
reached
easily
from
the
top
of
the circuit
breaker
.
Opening
Time
poeihgillmfi
To
adjust
the latch
(
2
)
engagement
,
proceed
as
follows
:
25
-
35
40
-
60
1
.
Backoff
adjusting
screw
(
3
)
to
assure
excessive latch
engage
-
ment
.
NOTES
:
2
.
Close
the
circuit breaker
.
1
.
Below
0
°
C
,
the
closing
times
will
increase
(
but
with
no
reduction
in
closing
force
)
;
and
opening
times
will
be
within
the limits
.
3
.
Turn
adjusting
screw
(
3
)
down
slowly
until the
latch
just
releases
,
tripping
the circuit
breaker
.
2
.
Adjustments
to
correct
speeds
,
if
found
to
be outside limits
,
are
critical
and
the
nearest
District
Office
should be
contacted
for
recommendations
.
4
.
Back
off
the
adjusting
screw
(
3
)
2
turns
.
Control
Device
(
See
Fig
.
5
)
Operating
Mechanism
The
control device
is
adjusted
before
leaving
the
factory
.
It
is
recommended that
no
attempt
be made
to
adjust
the internal
relays
and
contacts
of
this
device
in
the
field
.
If
replacement
of
the
control
device is
required
,
the close latch release
rod
(
5
)
overtravel
may
be
adjusted
as
described below
.
The various
mechanism
adjustments
described
in
the
following
sections
apply
to
all circuit
breakers covered
by
this Instruction
Bulletin
.
1
.
Back
off
on
close
latch release rod
(
5
)
and check
that the
circuit
breaker
will
not
close
by attempting
to
close
it
electrically
or
manually
pushing
up
on
close latch
release
rod
(
5
)
to
the
full
extent
of
its travel
.
2
.
Charge
the
closing springs
.
Push
up
on
close latch release
rod
(
5
)
to
the
full
extent
of
its travel
.
While
holding
the close
latch
1
.
Mechanism
Housing
2
.
Latch
3
.
Adjusting
Screw
£
2
A
/
/
5
/
IN
UZ
-
ID
1
.
ROLLER
.
CLOSE
LATCH
2
.
CHARGING CAM
3
.
ACTUATOR
.
LIMIT
SWITCH
5
.
CLOSE
LATCH
RELEASE
ROO
6
.
SPRING
.
CLOSE
LATCH RELEASE
ROD
7
.
SECONDARY
CLOSE
LATCH
8
.
PRIMARY
CLOSE
LATCH
Fig
.
4
-
Latch
Adjustment
Fig
.
5
-
Control
Device
Adjustment
Courtesy of NationalSwitchgear.com

ABB VHK-R Specifications

General

Brand	ABB
Model	VHK-R
Category	Circuit breakers
Language	English