ABB 15VHK500 User manual

IB
6.2
.
7.7
-
1
D
Installation
/
Maintenance
Instructions
Medium
-
Voltage
Vacuum
Power
Circuit
Breakers
Type
15
VHK
500
/
750
1200
/
2000
Amperes
15000
Volts
ikllll
MIPIP
ABB
Power
Distribution
,
Inc
.
Circuit
Breaker
Division
ASEA
BROWN BOVERI
Courtesy of NationalSwitchgear.com

>
AM
ASEA
BROWN
BOVERI
n
TABLE
OF
CONTENTS
PAGE
INTRODUCTION
AND
RATINGS
RECEIVING
AND
STORAGE
CIRCUIT
BREAKER
INSTALLATION
General
Installation
Inspection
Removing
Front
Cover
and
Interphase
Barrier
..
Interphase
Barrier
Examination
Vacuum
Interrupter
Examination
Insulation
Structure
Installing
Front
Cover
and
Interphase
Barrier
..
.
Installing
Circuit
Breaker
into
Compartment
.
.
..
CIRCUIT
BREAKER
REMOVAL
MAINTENANCE
General
Information
Millivolt
Drop
Test
Insulation
Cleaning
CIRCUIT
BREAKER
OPERATION
AND
CONTACTS
Closing
and
Opening
Times
and
Speeds
Operating
Mechanism
Racking
Mechanism
Control
Relay
Adjustment
LUBRICATION
DIELECTRIC
TESTS
ELECTRICAL
CHARACTERISTICS
ELECTRICAL
OPERATING
SEQUENCE
RENEWAL
PARTS
TYPICAL
CONTROL
CIRCUIT
3
3
3
3
.
3
3
3
3
5
5
5
5
6
6
6
7
.
7
.
9
.
9
.
9
9
10
10
10
10
11
12
These
instructions
do
not
purport
to
cover
all
details
or
variations
nor
to
provide
for
every
possible
contingency
to
be
met
in
connection
with
installation
,
operation
,
or
maintenance
.
Should
further
information
be
desired
or
should
particular
problems
arise
which
are
not
covered
sufficiently
for
the
purchaser
'
s
purposes
the
matter
should
be
referred
to
the
nearest
District
Office
.
Courtesy of NationalSwitchgear.com

AM
IB
6.2
.
7.7
.
-
1
Page
3
ASEA
BROWN
BOVERI
INTRODUCTION
These
instructions
for
installation
,
operation
and mainte
-
nance
of
15
VHK
vacuum
circuit breakers should be
read
carefully
and used
as
a
guide during
installation
and
initial
operation
.
The
specific
ratings
of
each
model circuit breaker
are
listed
on
the
individual
nameplates
.
File
these
instructions
in
a
readily
accessible
place
to
-
gether
with
drawings
and
descriptive
data
of
the switch
-
gear
.
These instructions
will
be
a
guide
to
proper
mainte
-
nance
of
the
equipment
and
prolong
its
life
and
usefulness
.
The circuit breaker is
shipped
with
contacts
closed
,
closing
springs
discharged
and
opening springs charged
.
If
the
circuit
breaker
is
furnished
with
an
undervoltage
device
,
the
device
will
be lockwired
to
allow
closing
of
the
breaker
for
shipment
.
A
tag
will
identify
the lock
wire
.
To
remove
the
wire
,
open
the breaker and reach behind the control
panel
f
rom
the
right
hand side
.
Using
wire
cutters
,
cut
and
remove
the
tagged
wire
.
WARNING
WARNING WARNING
WARNING
Priortoanydisassemblyorinspectionofthe
circuit
breaker
,
the
closing springs
should
be
discharged
,
and the
breaker
should
be
open
.
Referring
to
Fig
.
1
,
if
it is
necessary
to
raise
or move
the
breaker
,
attach
a
lifting
yoke
(
5
)
at
points
4
on
both
sides
of
the
truck
,
or
a
fifth
wheel
at
point
6
to
transport
the
breaker
as
required
.
RECEIVING
AND
STORAGE
Immediately
upon
receipt
of
the circuit
breakers
,
examine
the
cartons
to
determine
if
any
damage
or
loss
was sus
-
tained
during
transit
.
If
injury
or
rough
handling
is evident
,
file
a
damage
claim
at
once
with the
carrier and
promptly
notify
the
nearest
District
Office
.
The
company
is
not
responsible
for
damage
of
goods
after
delivery
to
the
carrier
,
however
,
we
will
lend assistance
if
notified
of
claims
.
Unpack
the
circuit
breakers
as
soon
as
possible
after
receipt
.
If
unpacking
is
delayed
,
difficulty
may
be
experi
-
enced
in
making
a
claim
for
damages
not
evident
upon
receipt
.
Use
care
in
unpacking
in
order
to
avoid
damaging
any
of
the
circuit breaker
parts
.
Check
the
contents
of
each
carton
against
the
packing
list
before
discarding
any
pack
-
ing
material
.
If
any
shortage
of
material is
discovered
,
promptly
notify
the
nearest
District
Office
.
Information
specifying
the
purchase
order number
and
part
numbers
of
the
damaged
or
missing
parts
should
accompany
the
claim
.
Circuit
breakers should
be
installed
in
their
permanent
location
as
soon
as
possible
.
If
the
breakers
are
not
to
be
placed
in
service
for
some
time
,
it is
advisable
to
provide
adequate
means
of
protection
.
This
may
be
done
by
keeping
the
breaker
in
its
original shipping
carton
and
storing
in
a warm
,
dry
and
uncontaminated
atmosphere
.
If
the
circuit
breaker
cannot
be
stored
properly
due
to
circum
-
stances
,
it
must
be
thoroughly
checked
before
going
into
service
to
insure
it has
not
absorbed
moisture
,
rusted
or
become
generally
contaminated
in
any way
.
Installation
Inspection
Inspect
condition
of
circuit
breaker
vacuum
interrupters
and
electrical
connections
prior
to
installing
the circuit
breaker into
the switchboard
.
Even
though
each
circuit
breaker is
completely adjusted
and
tested
at
the
factory
,
shipping
and
handling
conditions
could
cause
defects
.
The
front
cover
and
interphase
barrier
assemble
(
2
,
Fig
.
1
)
must
be
removed
for
access
to
and
inspection
of
the
vacuum
inter
-
rupters
,
and
their
associated
adjustments
.
Removing
Front
Cover
and
Interphase
Barrier
(
See
Fig
.
1
)
The
assembly
can
be
removed
after
first
removing
four
(
4
)
lower
,
front
cover
screws
(
1
)
and
one screw
(
7
)
on
each
side
,
inside
the
front
cover
.
Interphase
Barrier
Examination
All
barrier hardware
should be
securely tightened
.
There
should be
no
through
holes
or
apparent
missing
hardware
on
the
barrier
assembly
.
Also
,
dust
or
dirt should
be
removed
by wiping
with
a
clean lintless cloth
saturated with
an
oil
-
free
solvent
.
Vacuum
Interrupter
Examination
(
See
Fig
.
2
)
CIRCUIT
BREAKER
INSTALLATION
CAUTION
CAUTION
CAUTION
CAUTION
General
Prior
to
initial installation
of
the
circuit
breaker
into
the
switchboard
,
certain
preliminary
inspections
should
be
made
to
insure
proper
operation
.
The
inspection
proce
-
dures
for
this
are
given
in
this
section
.
Afterthe
interphase
barrierhas been removed
,
agrounding
stick should be
used
to
discharge
the
mid
-
band
ring
,
on
the
vacuum
interrupters
(
1
)
so
equipped
,
before
any
work
is
done
on
the
interrupters
.
Courtesy of NationalSwitchgear.com

IB
6.2
.
7.7
.
-
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Page
4
ASEA
BROWN
BOVERI
Fig
.
2
*
Circuit
Breaker
with
Front
Cover
&
Interphase
Barrier
Assembly
Removed
Fig
1
-
Circuit
Breaker
Assembly
with
Lifting
Yoke
Installed
.
)
Fig
.
3
-
Front
Circuit
Breaker
Panel
&
Accessories
Courtesy of NationalSwitchgear.com

ABB
IB
6.2
.
7.7
.
-
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Page
5
ASEA
BROWN BOVERI
Installing
Circuit
Breaker into
Compartment
(
See
Figs
.
3
&
4
)
NOTE
:
CLOCKWISE
ROTATION
of
racking
crank
for
inserting
breaker
.
COUNTERCLOCKWISE
rotation
of
racking
crank
for
removal
of
breaker
.
Turn
motor
disconnect
switch
(
1
,
Fig
.
3
)
to
“
OFF
"
position
.
Engage racking
crank
(
4
,
Fig
.
4
)
and
push
racking
unlock
-
ing
lever
(
3
)
to
left
,
then
rotate
racking
crank
counterclock
-
wise
only
until resistance
to
motion is
felt
(
DO NOT FORCE
)
.
If
closing springs
were
left
in
the
“
charged
”
condition
,
they
will
automatically
discharge
.
For
installing
the circuit
breaker
into the lower
compart
-
ment
,
the
fifth
wheel is
used
to
position
the breaker
so
that
it
is lined
up
with
the
switchgear
.
Engage
the
fifth
wheel
(
12
,
Fig
.
3
)
with
hole
(
5
,
Fig
.
3
)
.
The
lift
device is
required
to
lift
and
position
the
breaker
for
installation into the
upper
compartment
.
Guide
and
push
circuit
breaker
into
compart
-
ment
until
stopped
.
Again
engage
racking
crank and
rotate
clockwise
until
racking
mechanism
automatically
stops
at
“
DISCONNECT
’
position
.
(
Breaker is
now
held
captive
in
compartment
.
)
To
rack
circuit
breaker
to
‘
TEST
”
position
,
push
racking
unlocking
lever
(
3
,
Fig
.
4
)
to
left
,
rotate
racking
crank
approximately
1
/
4
turn
clockwise
,
then
release
unlocking
lever
.
Continue
cranking
until
racking
mechanism
auto
-
matically
stops
at
'
TEST
”
position
.
With
thecircuit
breaker
racked
to
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 motordisconnect
switch
(
1
,
Fig
.
3
)
to
“
ON
”
position
to
charge
the
closing springs
,
and
operate
the
breaker
as
required
.
The
insulated
vacuum
envelope
(
2
)
should be examined
carefully
for
cracks
in
the
area
of
the metal
-
to
-
insulation
seals
on
both ends
and
around
the mid
-
band
ring
.
Since
a
certain
amount
of
transmitted
light
is
usually
required
to
detect cracks
,
the
inspection
should be done
in
a
well
lighted
area
.
If
the mid
-
band
ring
,
when
so
equipped
,
has
been
bent
by
an
accidental
impact
,
that
area
should be
specially
scruntinized
for
seal
damage
.
Small
external
chips
,
however
,
will
not
impair
the
useful life
of
the
inter
-
rupter
.
To
prevent
loss
of
vacuum care
should be exercised
so
as
notto
damage
the
interrupter
’
s
plastic
cover vacuum
Pinch
-
off
tube
(
3
)
.
Insulation
Structure
All
insulated
parts
should be checked
for
damage
.
Any
dust
or
dirt
should
be removed
by
air
or
wiped
with
a
clean
lintless cloth
saturated
with
an
oil
-
free
solvent
.
This
is
important
because
dirt
and dust
can
accumulate and
,
with
moisture
,
can
place
the
circuit
breaker
in
jeopardy
,
dielec
-
trically
.
The
lead
support
moldings
are
basically polyester
glass
and
occasionally
have
some
resin
rich
cracks
or
crazing
develop
but
these do
not
indicate
defective
material
and
should
not
cause concern
.
Installing
Front
Cover
and
Interphase
Barrier
(
See
Fig
.
D
Install
the assemble and
fasten
with
four
lower
front
cover
screws
(
1
)
and
one screw
(
7
)
on
each
side
,
inside the
front
cover
.
NOTE
:
It
is
recommended
thatadielectricwithstandtest
be
made
prior
to
initially
putting
this
or
any
type
vacuum
circuit
breaker into service
.
Refer
to
Dielectric
Tests
,
in
the
Main
-
tenance
,
Adjustments
and Tests section
of
this bulletin
,
for
the
correct
test
procedure
.
WARNIG
WARNING
WARNING
WARNING
When
racking
circuit breaker
to
“
CONNECTED
”
position
,
close
compartment
door
(
1
,
Fig
.
4
)
and
insert
racking
crank
(
4
,
Fi
3
4
.
)
through sliding
panel
(
2
,
Fig
.
4
)
.
Push
unlocking
lever
(
3
)
to
left
and
turn
racking
crank
(
4
)
approximately
1
/
4
turn
clockwise
,
then release
unlocking
lever
.
Continue
cranking
until
racking
mechanism
auto
-
matically
stops
at
“
CONNECTED
”
position
.
CAUTION CAUTION CAUTION
CAUTION
Do
not
attempt
to
rack
any
further
.
The
circuit
breaker
may
now
be
put
in
service and be
operated
as
required
.
CIRCUIT
BREAKER
REMOVAL
(
See
Fig
.
4
)
To
remove
circuit breaker
from
“
CONNECTED
”
position
Fig
.
4
—
Method
of
Racking
Circuit
Breaker
Courtesy of NationalSwitchgear.com

AM
IB
6.2
.
7.7
.
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Page
6
ASEA
BROWN
BOVERI
open
the breaker
as
required
.
Open
sliding
door
(
2
)
in
front
compartment
door
(
1
)
.
En
-
gage
racking
crank
(
4
)
and
push
racking
unlocking
lever
(
3
)
to
left
.
Rotate
racking
crank
(
4
)
counterclockwise
approxi
-
mately
1
/
4
turn
,
then
release
unlocking
lever
.
Continue
cranking
counterclockwise
until
racking
mechanism
auto
-
matically
stops
at
“
TEST
'
position
.
and
it
is
not
expected
that the
interrupters
will
have
to
be
replaced
due
to
excessive erosion
of
contacts
.
There is
,
however
,
a
checkforcontact
wipe
(
contact
pressure
)
which
is
also
a
measure
ol
contact
erosion
.
This check
is
covered
under
‘
Circuit
Breaker
Operation
and
Contacts
”
.
When
contact
wipe
is less
than
the
minimum
specified
and
it
has
been
determined
that
the breaker
closes
fully
and
there
is
not
a
mechanical
problem
,
then
the
interrupter
should be
replaced
due
to
contact
erosion
.
If
,
however
after
the
first
inspection
period
there
is
no
indication
of
any
problems
,
actual
operating
experience
with
specific
circuits
will
indicate
the
future
amount
of
maintenance
needed
for
the
various
circuit
breakers
and
the
procedure
can
be
modified
as
required
.
Ol
course
,
where
unusual
service
conditions
exist
,
as
covered
by
ANSI
Standard
C
37.04
,
it
must
be
presumed
that
these
conditions
were
considered
at
the
time
of
order
;
that
the
equipment
supplied
was
designed
for
the
special
application
;
and
that
an
appropriate supplemental
mainte
-
nance
program
has been
developed
.
These
maintenance
instructions
only
cover
circuit
breakers
used under
the
standard service
conditions
.
At
the selected
maintenance
period
,
the
following
tests
and
adjustments
should be
made
;
NOTE
:
The
following
tabulated
tests
and
adjustments
are
those
that
are
normally
necessary
for
proper
maintenance
and
operation
of
the
15
VHK
circuit breaker
.
The
remaining
portions
of
the
breaker
—
close
coil
assembly
,
shunt
trip
device
,
control
relay
,
auxiliary
switch
and
motor
require
no
maintenance
during
the
standard
life
of
the
circuit
breaker
regardless
of
the
operating duty
.
Repeat
same
operation
for
“
DISCONNECT
'
position
.
The circuit
breaker
can
now
be
positioned
for
withdrawal
.
If
in
the
upper
compartment
the
lift
device
must
first
be
located
in
the
correct
position
.
For
withdrawal
from
the
switchboard
,
again
push
the
racking
unlocking
lever
to
the
left
and
turn
the
racking
crank
counterclockwise
only
until
resistance
to
motion
is
felt
.
(
Approximately
2
-
3
turns
—
DO
NOT
FORCE
.
)
The
closing
springs
,
if
charged
,
will
auto
-
matically
discharge
when
the circuit
breaker
is moved
to
the
withdrawn
position
.
The
circuit
breaker
can
now
be
re
-
moved
from
the
compartment
by
pulling
on
the
handle
located
on
the
front
barrier
.
MAINTENANCE
,
ADJUSTMENTS
AND
TESTS
General
Information
j
The
15
VHK
circuit
breakers
are
designed
for
minimum
maintenance
and tested
to
insure
that
minimum
mainte
-
nance
will
be
required
.
The
few
adjustments
that
are
noted
are
required
only
when
an
operational
check
indicates
a
problem
.
Of
course
,
during
the
maintenance
checks
,
all
accessible
bolts
,
nuts
and
screws
should
be
routinely
checked
to
insure that
they
are
tight
,
it
is
recommended
that
the circuit
breaker
be
normally
inspected
after
the
first
2000
operations
,
regardless
of
the
type
of
duty
it
is used
for
.
These
operations
can
be
either
no
-
load
mechanical
,
load
current
switching
,
bulk
capacitor
or
reactor
switching
operations
,
or
for
motor
starting
appli
-
cations
.
Vacuum
interrupters
,
as
used
on
the
15
VHK
circuit break
-
ers
,
have
an
inherently
long
contact
life
and
will
provide
troublefree
service
under varied
application
conditions
,
as
long
as
the circuit
breaker is
applied
within
its
rating
.
The
wear
condition
of
the individual
vacuum
interrupters
will
vary
,
depending
on
circu
it
conditions
and
such
variables
as
single
phase
versus
three
-
phase interruption
,
X
/
R
ratio
(
asymmetry
)
and
relay
delay
times
.
Of
course
,
interrupting
high
short
-
circuit
current
will
cause
contact
erosion
to
occur
faster
than load
current
interruptions
.
The
interrupters
for
the
15
VHK
Circuit
Breakers
are
designed
and
tested
for
2000
%
KSI
minimum
.
It
is
unlikely
that
a
circuit
breaker
will
be
subjected
to
this
much
duty
during
the
life
of
the
breaker
D
.
C
.
Millivolt
Drop
Test
During
maintenance
periods
,
the condition
of
the breaker
current
circuit
can
easily
be
determined
by
performing
a
millivolt
drop
test
.
This
test
should
be
performed
regardless
of
whether
the
circuit breaker
had
interrupted
low
or
high
currents
or
has
minimum
operations
.
The
following
table lists
the
millivolt
drop
and resistance
values
tor
the
circuit
breakers
covered
by
this
instruction
book
,
from
terminal
to
terminal
,
exclusive
of
the
primary
disconnects
.
Maximum
Maximum
MV
Drop
*
Micro
-
Ohms
Curcuit
Breaker
15
VHK
500
/
750
1
200
Ampere
7
35
;
15
VHK
500
/
750
2000
Ampere
6
30
‘
Millivolt
drop
with
200
amperes
DC
flowing
.
Courtesy of NationalSwitchgear.com

AM
IB
6.2
.
7.7
.
-
1
Page
7
ASEA
BROWN
BOVERI
d
.
The
measurement
with
the breaker
open
should
be
at
least
.
020
"
greater
than
when
the
breaker is closed
.
e
.
When
contact
wipe
is
less
than
the
.
020
and
it
has
been determined that the breaker
closes
fully
and
there
is
not
a
mechanical
problem
,
then
the
interrupter
should
be
replaced
due
to contact
erosion
.
4
.
Contact
Air
Gap
(
See
Fig
.
5
)
The
contact
air
gap
is
set at
the
factory
at
the nominal dimension
of
.
43
.
This value
will
normally
increase
as
the
contacts
erode
.
A
check
of
the
contact
air
gap
checks
that the breaker does
open
fully
and
that the
gap
is
sufficient
to
withstand
the
applied
voltage
.
The
measurement
is made
as
follows
for
the three
poles
.
a
.
Open
the
breaker
and
discharge
the
closing springs
.
b
.
Measure
and
record dim
.
Y
2
.
c
.
Close
the
breaker
,
measure
and record
dim
.
Y
.
d
.
The
air
gap
is the
difference
between
the
two
meas
-
urements
.
The
acceptable
limits
are
.
40
—
.
54
,
with
the
upper
limit
being
approached
as
contact
wipe
approaches
the minimum
.
On
circuit breakers
with
normal
or
less than normal load
-
ings
,
the listed values
may
be
exceeded
up
to
150
%
.
For
optimum
performance
of
the
circuit
breakers
during
periods
of
increased
loading
,
it
is
recommended that
the
listed values
not
be
exceeded
.
Insulation
Cleaning
Any
dirt
,
dust
or
grease
should
be
removed
from
the
surfaces of
the
entire
current
carrying
structure
,
vacuum
interrupter
,
base
insulation sheet and
interphase
barrier
assembly
.
Wiping
the
surface
with
an
oil
-
free
solvent
on a
clean
cloth
or
industrial
wiper
is
normally
sufficient
for
this
purpose
.
‘
Remember
to
discharge
mid
-
band
ring
on
interrupters
so
equipped
.
CIRCUIT
BREAKER
OPERATION
AND
CONTACTS
1
.
To
check
breaker
operation
,
the breaker
should
be
withdrawn
from
the switchboard
,
the
front
cover
and barrier
removed
and
the
racking
screw
turned
two
to
three
turns
clockwise
until
the
racking unlocking
lever
snaps
into
the
first
position
corresponding
to
the
disconnect
position
.
2
.
Fully
closed
breaker
(
See
Fig
.
3
)
.
Charge
the
closing
springs
and
turn
the
motor
switch
(
1
)
off
.
Close
the breaker
.
Engage
manual
charge
handle
(
3
)
with
charging
lever
(
3
)
.
During
the
initial
portion
of
the
downward
stroke
of
the
handle check
to
see
which direction
the
closing spring
guides
(
2
)
move
.
If
the
spring
guides
start
to
move
out
then
the
breaker
did
fully
close
. If
the
spring
guide begins
to
move
in
and
with
additional
pumping
moves
in
until
the
mechanism
can
be
heard
to
“
snap
in
”
,
then the breaker did
not
fully
close
originally
.
Excess
contact
pressure
orfriction
can cause
this condition and
if
it
cannot
be relieved then
the
factory
should
be
consulted
.
3
.
Contact
wipe
(
contact
pressure
)
(
See
Fig
.
5
)
.
The
contact
air
gap
and
contact
wipe
is
set
at
the
factory
by
setting
the
vertical
position
of
the
interrupter
(
1
)
and
the
vertical
position
of
the
pushrod
(
2
)
.
These
parts
should
not
be
repositioned
in
the
field
unless
a
pushrod
change
is
required
to
correct contact
sequence
as
described
else
-
where
.
Contact
wipe
is
set at
the
factor
at
.
11
minimum
.
Contact
erosion and
wear
in
mechanical
parts
will
cause a
reduction
in
contact
wipe
over
the
life of
the breaker and
a
check should
be
made
to
insure
that
the
wipe
is
not
less
than
.
020
"
.
The
measurement
is
made
as
follows
for
the
three
poles
:
a
.
Open
the breaker and
discharge
the
closing springs
.
b
.
Using
a
thin
6
"
scale
measure
from
the
spring
base
to
pivot pin
3
.
Record
dimension
X
2
.
c
.
Close
the breaker and
again
measure
between the
spring
base and
pivot
pin
3
.
Record
Dim
.
X
.
5
.
Contact
sequence
(
See
Fig
.
5
)
.
All
three
poles
should
touch
within
2
millisecond
at
normal
closing
speeds
.
An
oscilloscope
,
oscillograph
or
other
timing
method
may
be
used
to
establish the
2
millisecond
timing
.
Before
checking
contact
sequence
,
check that
the
contact
wipe
and
air
gaps
are
correct
.
It
is
not
expected
that the
contact
sequence
should
exceed
the
2
millisecond
limit
;
therefore
,
before
attempting
to
readjust
,
check
that the
test
equipment
and
procedure
are
correct
.
Also consider
,
espe
-
cially
when
testing
with
electronic
equipment
,
that
.
002
seconds
vacuum
interrupter
contact
bounce is
permissible
during
normal
closing
and this bounce
can
influence
the
contact
touch
measurements
.
If
it
is determined that the
contact
sequence
is
not
within
the
2
milliseconds
,
then
adjustment
is
required
.
Usually
,
read
-
justment
of
one
pole
should
be
sufficient
so
that
all
three
poles
touch
within
2
milliseconds
.
The
air
gap
of
the
pole
to
be
changed
should be decreased
if
the
contacts
of
that
pole
are
touching
afler
the other
two
poles
,
or
increased
if
the
contacts
are
touching
before
fhe
other
two
poles
.
The air
gap
is decreased
by
turning
pushrod
(
2
)
clockwise
,
viewing
from
the
top
of
the
breaker
,
and increased
by
turning
counterclockwise
.
Before
the
pushrod
can
be turned
,
the
breaker
must
be
open
,
closing springs discharged
and
pin
(
3
)
removed
.
With
the breaker
open
,
the
vacuum
in
the
interrupter
maintains
a
constant
upward
force of
approx
.
25
lbs
.
on
the
moving
contact
and
pushrod
(
2
)
.
Therefore
,
before
remov
-
ing
pin
(
3
)
,
the
contact must
be held down
in
the
open
position
by
temporary
spacers
at
location
(
z
)
.
After
remov
-
ing retaining ring
(
4
)
and
pin
(
3
)
,
rotate
pushrod
(
2
)
as
Courtesy of NationalSwitchgear.com

ABB
IB
6.2
.
7.7
.
-
1
Page
8
ASEA
BROWN
BOVERI
0
—
r
a
4
*
Vfim
'
S
-
'
r
,
J
earner
i
%
l
*
T
J
m
*
OPENING
THOUGH
.
j
iw
.
R
K
HOUSING
4
PTU
0
C
41
2
Fig
.
6
—
Latch
Check
Switch
Adjustment
RACKING
LEAD
SCREW
%
AOi
'
I
rp
T
(
o
t
\
o
RACKING
RCLEASC
CEVTR
D
.
@
5
.
\
;
y
PADLOCK LOCKOUT
PLATE
2
Fig
.
7
—
Racking
Mechanism
Courtesy of NationalSwitchgear.com

ABB
IB
6.2
.
7.7
.
-
1
Page
9
A
3
EA
BROWN
BOWER
!
with
bell
ringer
)
.
Retract
adjusting
screw
until
switch
con
-
tacts
“
make
”
,
then
rotate
adjusting
screw
one
turn
more
.
(
Adjusting
screw
is
self
-
locking
.
)
required
.
1
/
4
turn
of
the
pushrod
(
2
)
will
change
the air
gap
by
approx
.
.
019
.
After
rotating
the
pushrod
,
carefully
reposition
the
moving
contact
and
pushrod
vertically
to
align
the
pin
holes
.
Replace
the
pin
and retainer and
remove
the
temporary
spacer
.
During
the
readjustment
procedure
note
that
the
contact
wipe
and
air
gap
dimensions
,
specified
previously
,
must
be
maintained
.
Also
,
that
no
more
than
1
/
2
turn
total
of
the
pushrod
should
be
required
when
readjusting
for
contact
sequence
.
After
completing
the
contact
sequence
procedure
,
recheck
the
contact
wipe
and air
gaps
.
The
front
cover
and
interphase
barrier
assembly
can
now
be
reinstalled
-
Return
the
racking
screw
to
its
original
position
by
turning
it
counterclockwise
approx
,
two
to
three
turns
until
it
stops
.
Racking
Mechanism
(
See
Fig
.
7
)
The circuit
breaker
racking
mechanism is
adjusted
for
proper
operation
and
should
not
be disturbed
unless
it
becomes
possible
to
close
the
breaker
during
a
racking
operation
.
It
may
be
possible
that interlocked
blocking
members
are
not
positioned
properly
,
which should be corrected
as
follows
:
Remove the
lowerfront
mechanism
coverplate
and
with
the
circuit breaker closed
,
make
adjustments by regulating
the
length
of
connecting
rod
(
1
)
for
1
/
32
inch minimum
to
3
/
32
inch maximum
clearance
of
“
A
”
between
trip
link
(
3
)
and
blocking
lever
(
2
)
.
The maximum
adjustment
at
point
“
A
"
should
not
exceed
3
/
32
inch
.
Closing
and
Opening
Times and
Speeds
After
the
operation
intervals noted
previously
,
the
closing
and
opening
times
are
recommended
to
be
checked
by
use
of
a
cycle
counter
,
travel recorder
,
oscillograph
,
etc
.
to
monitor
the time
from
energizing
to contacts
touch
or
part
.
*
A
potentiometer
with
mounting
support
,
used
in
conjunc
-
tion
with
an
oscilloscope
or
oscillograph
,
and instructions
are
available
on
special
order
for
specifically
checking
opening
and
closing
speeds
.
The circuit breaker
closing
and
opening
times should be
within
the
following
time
ranges
for
normal
operation
.
Control
Relay Adjustment
(
See
Fig
.
8
)
The control
relay
does
not
normally
require
any
adjustment
in
the
field
.
However
,
if
necessary
adjust
the
gap
between
the control device lever
adjusting
screw
and the
limit
switch
crank
arm
for
a
1
/
64
—
1
/
32
gap
with
the
closing springs
charged
.
With
the
closing springs discharged
,
the
gap
between
the lever
stop
and the lever should be
1
/
64
"
to
1
/
16
"
.
Closing
Time
Opening
Time
Range
—
MS
Range
—
MS
UV
(
M
AQJ
.
scn
«
w
AMO LOCK
NUT
CONTROL
40
-
60
25
-
35
NOTES
:
1
.
Below
0
°
C
,
the
closing
times
will
increase
(
but
wilh
no
reduction
in
closing
force
)
,
and
opening
times
will
be
within
the
limits
.
2
.
Adjustments
to
correct
speeds
,
if
found
to
be
outside
limits
,
are
critical
and the
nearest
District
Office
should be
contacted
for
recommendations
.
LEVER
5
TOA
Operating
Mechanism
(
See
Fig
.
6
)
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
(
when
used
)
is
not
actuated
.
Circuit
breaker should
not
close
before
trip
latch
(
4
)
has
reset
.
Adjustments
should be made
with
latch
(
4
)
against
reset
stop
pin
(
3
)
.
Turn
in
adjusting
screw
(
1
)
until
contacts
of
switch
(
2
)
“
break
”
(
as
indicated
by
an
audible click
or
check
LIMIT
SWITCH
CHANK
CONTROL
DEVICE
Fig
.
B
Control
Relay
Courtesy of NationalSwitchgear.com

ABB
IB
6.2
.
7.7
.
-
1
Page
10
ASEA
BROWN
BOVERI
rupter
to
emit
some
X
-
radiation
which
could be
a
health
hazardon
prolonged
exposure
at
close
range
.
Accordingly
,
even
though
the
emission
is
low
and
on
for
such
a
short
period
of
time
,
it
is
considered
appropriate
to
exercise
caution
.
Therefore
,
do
not
run
any
primary
circuit
dielectric
with
-
stand
tests
on
isolated
interrupters
with
open
contacts
,
above
rated
voltage
unless
test
personnel
are
adequately
shielded
or
they
are
no
less than
six
feet from
the
test
unit
.
Regarding
complete
breakers
,
it
is noted
that
NO
hazard
-
ous
X
-
radiation is
produced
with
closed
contacts at
any
test
voltage
or
with
open
contacts
at
rated
voltage
and there
should
be
no
cause
for
concern
.
Further
,
if
the
breaker
is
tested
in
its
switchgear
compartment
,
the
enclosure
steel
provides
sufficient
shielding
to
protect
personnel
from
X
-
radiation
at
the
test
voltages
recommended
below
at
the
normal
distances
maintained
for
electrical
safety
.
The
following
test
values
should be used
for
dielectric
testing
the
complete
breaker
and
are
to
be
applied
for
a
one
-
minute
period
.
LUBRICATION
The
15
VHK
circuit
breakers
are
lubricated
during
factory
assembly
as
follows
:
1
.
All
mechanism
parts
,
bearings
,
pins
,
etc
.
,
have been
lubricated
with
Anderol
757
manufactured
by
Nuodex
,
Inc
.
( formerly
Tenneco
Chemical
,
Inc
.
)
.
(
ABB
No
.
71
2994
A
,
4
oz
.
tube
)
.
If
the
grease
should
become
contaminated
or
unduly
oxidized
(
hardened
and
darkened
)
or
if
parts
are
replaced
,
any
relubrication
should be
done
with
the
lubricants noted
.
NOTES
:
1
.
The
mechanism
should
be
periodically
inspected
for
lubrication
contamination
:
frequency
of
inspection
is
de
-
pendent
on
operating
environment
.
2
.
Do
not
use
light
oil
to
lubricate
any
mechanism
parts
.
In
emergency
situations
,
Anderol
732
may
be
used
as
a
temporary
lubricant
.
In
these
cases
,
allow time
for
the
solvents
to
evaporate
prior
to
any
mechanical
operations
.
It
is
mandatory
that
the
breaker
undergo
thorough
lubrica
-
tion
with
Anderol
757
at
the
next
maintenance
interval
.
Use
of
solvents
to
free
contaminated lubricant
is
strictly
forbid
-
den
without
immediate
relubrication
using
Anderol
757
.
Note
that
bearing
surfaces
must
be
repacked
a
this
will
require
disassembly
of
the
mechanism
.
Do
not
operate
t
circuit
breaker
without
completing
this
procedure
.
3
.
The
charging
motor
is
sealed
and
no
lubrication is
required
.
60
Hz
Primary
Circuit
36.0
kV
‘
Secondary
Circuit
(
Control
)
1100
V
«
»
•
‘
If
it
is
desired
to
make
a
dielectric
test
on
the
secondary
control
wiring
,
turn
the
spring
charging
motor
disconnect
switch
(
1
,
Fig
.
3
)
to
the
“
OFF
"
position
.
Apply
test
voltage
(
1100
V
-
AC
)
for
one
minute
to
each
of
the
secondary
disconnect
contacts
at
the
rear
of
the
circuit breaker
.
If
it
is desired
to
make
a
dielectric
test
on
the
spring charging
motor
,
turn
the
motor
disconnect
switch
(
1
,
Fig
.
3
)
to
the
“
ON
”
position
.
Apply
test
voltage
(
540
V
-
AC
)
for
one
minute
to
the
motor
circuit
.
DIELECTIRIC
TESTS
It
is
recommended
that
dielectric
withstand
tests
be
made
prior
to
use
and
then
at
routine
maintance
periods
to
verify
the
integrity
of
vacuum
interrupters
.
If
,
during
the
dielectric
withstand
test
,
the
required
test
voltage
cannot
be
sus
-
tained
across
the
open
contacts
of
the
vacuum
interrupter
,
the
interrupter
is
faulty
and
must
be
replaced
.
Always
insure
that the
contact
air
gap
is
correct
betore
conducting
primary
circuit
dielectric
tests
.
ELECTRICAL
CHARACTERISTICS
OF
CONTROL
DEVICES
For
operating
voltage
ranges
for
various
nominal
control
voltages
,
refer
to
Table
1
.
For
average
current
values
at
various
nominal
control
voltages
,
refer
to
Table
2
.
The
current
values
given
in
this
table
are
average
.
,
steady
state
values
and
momentary
inrush
currents
for
all
charging
motors
and
AC
coils
are
approximately
six
to
eight
times these
values
.
CAUTION
CAUTION
CAUTION
CAUTION
While
the
procedure
for
dielectric
testing
a
vacuum
breaker
is similar
to
that
for
any
other
type
breaker
,
there
are
two
areas
which
require
extra
CAUTION
in
handling
.
1
.
The internal
shield
of
a
vacuum
interruptercan
acquire
an
electrical
charge
which
is
usually
retained
even
after
the
voltage
is removed
.
On
certain
types
of
interrupters
,
this
shield
is
attached
to
the
exposed
mid
-
band
ring
and
a
groun
-
ding
stick
should be
used
to
discharge
the
ring
before
working
on
the device
.
2
.
Dielectric
test
voltages
higher
than
rated
voltage
,
applied
across
open
contacts
,
may
cause a
vacuum
inter
-
ELECTRICAL
OPERATING
SEQUENCE
Please
refer
to
the
specific
schematic
diagrams
and
other
operational
information
furnished
with
your
order
.
Fig
.
9
is
provided
as
a
typical
schematic
for
general
information
on
electrical
operation
.
Courtesy of NationalSwitchgear.com