ABB 5VHK 250 Installation and operating instructions

IB
6.2
.
7.7
-
30
Installation
/
Maintenance
Instructions
Medium
-
Voltage
Vacuum
Power
Circuit
Breakers
Types
5
VHK
250
5
VHKX
250
1200
and
2000
Amperes
5000
volts
Models
20
and
21
ASMS
ABB
Power
Distribution
,
Inc
.
Circuit
Breaker
Division
ASHA
BROWN
BOVEF
Courtesy of NationalSwitchgear.com

IB
&
2.7
.
7
-
3
C
Pag
^
2
CONTENTS
PAGE
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3
INTRODUCTION
-
RECEIVING
AND
STORAGE
.
.
.
,
.
.
..
.
.
.
—
-
.
*
.
3
CIRCUIT
BREAKER
INSTALLATION
Garter
*
!
installation
Inspection
Removing
From
Cover
Vacuum
Interrupter
Examination
.
.
insulation
Structure
Installing
Front
Cover
Installing
Circuit
Breaker
imo
Compartment
Manual
Operation
of
Electrically
Operated
Models
CIRCUIT
BREAKER
REMOVAL
MAINTENANCE
:
ADJUSTMENTS
AND
TESTS
General
Information
Millivolt
Drop
Test
insulation
Cleaning
Circuit
Breaker
Operation
,
Contact
Adjustment
and
Timing
contact
Adjustment
,
.
..
-
Closing
and
Opening
Times
and
Speeds
Operating
Mechanism
Latch
Engagement
(
Bite
)
Racking
Mechanism
control
Relay
Adjustment
_
LUBRICATION
H
~
DIELECTRIC
TESTS
ELECTRICAL
CHARACTERISTIC
?
ELECTRICAL
OPERATING
SEQUENCE
DC
operating
Sequence
DC
Schematic
Diagram
of
Control
Circuit
-
AC
Operating
Sequenc
*
...
AC
Schematic
Diagram
of
Control
Circuit
RENEWAL
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Page
3
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and
reach
behind
thecxmtroi
panelf
torn
the
right
hand
side
,
Using
wire
cutters
,
cut
and
remove
the
tagged
wire
.
INTRODUCTION
These
instructions
tor
installation
,
operation
and
maintenance
of
5
VHK
Model
20
series
vacuum
circuit
breakers
should
be
read
carefully
and
used
as
a
guide
during
installation
and
initial
operation
,
The
specific
ratings
Of
each
modelcircurt
breaker
are
listed
on
The
individual
nameplates
.
File
these
instructions
in
a
readily
accessible
place
together
with
drawings
and
descriptive
data
of
the
switchgear
.
These
instruc
-
tions
will
be
a
guide
to
proper
maintenance
of
the
equipment
and
prolong
it
*
life
and
usefulness
.
'
WARNING
WAflNlMG
WARNING
WARNING
'
\
“
i
Fnor
to
anv
disassembly
or
inspection
Of
me
circus
Dreader
,
trc
cicsinc
3
snould
be
aiscnargec
.
end
me
ores
^
pr
should
br
open
.
Referring
to
Fig
,
1
,
If
it
is
necessary
to
raise
or
move
the
breaker
,
attach
a
lifting
yoke
(
5
)
at
point
4
on
both
skies
of
the
truck
,
or
a
fifth
wheel
at
point
6
to
transport
the
breaker
as
required
.
Installation
inspection
RECEIVING
AND
STORAGE
Inspect
the
condition
of
circuit
breaker
vacuum
interrupters
and
electrical
connections
prior
to
installing
thecircuit
breaker
into
tho
switchboard
.
Even
though
each
circuit
breaker
is
completely
adjusted
and
tested
at
the
factory
,
shipping
and
handling
condi
*
tlons
could
cause
defects
.
Immediately
upon
receipt
of
the
circuit
breakers
,
examine
the
cartons
to
determine
if
any
damage
or
loss
was
sustained
during
transit
,
tf
abuse
or
rough
handling
is
evident
,
file
a
damage
claim
at
once
wfm
the
cantor
and
promptly
notify
the
nearest
District
Office
,
The
company
Is
not
responsible
for
damage
of
goods
after
delivery
to
the
cantor
,
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
experienced
in
making
a
claim
for
damages
not
evident
upon
receipt
.
Use
care
In
unpack
*
ing
in
order
TO
avoid
damaging
any
of
tho
circuit
breaker
parts
,
Check
the
contents
of
each
canon
against
the
packing
list
before
discarding
any
packing
material
.
If
any
shortage
of
material
Is
discovered
,
promptly
notify
the
nearest
Dlstrtc
*
Office
.
Informa
-
tion
specifying
tho
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
tor
some
time
,
it
is
advisable
to
provide
adequate
means
of
protection
.
This
may
bedone
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
,
it
must
be
thoroughly
chocked
before
going
into
service
to
insure
it
has
not
absorbed
moisture
,
rusted
or
become
generally
contami
-
nated
in
any
way
.
Removing
Front
Cover
(
$
eo
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
.
Vacuum
interrupter
Examination
(
See
Fig
,
2
)
CAUTION
CAUTION
CAUTION
CAUTION
A
rrouf
'
chnp
stick
snou
;
d
oe
used
to
discnaroeine
mla
*
Dand
rir
.
j
;
or
.
?
ne
vacuum
interruoters
0
)
so
eauipPOG
,
Deiore
any
worn
*
?
.
,
aona
on
the
Interrupters
.
The
insulated
vacuum
envelope
(
2
)
should
be
examined
careful
!
)
for
cracks
in
the
area
of
the
metaMo
-
inaulatiOrt
seals
on
both
ends
and
around
the
midland
ring
.
Since
a
certain
amount
o
transmitted
light
is
usually
required
to
detect
cracks
,
the
irtspoc
tion
should
be
done
In
a
well
lighted
area
.
If
the
mid
-
band
ring
>
when
so
equipped
,
has
been
bent
by
an
accidental
impact
,
tha
area
should
be
specially
scrutinized
for
seal
damage
,
Smal
external
chips
will
not
impair
the
useful
life
of
the
Interrupter
.
Insulation
structure
All
Insulated
parts
should
be
checked
for
damage
*
Any
dust
or
dii
Should
bo
removed
by
air
orwiftod
with
a
dean
lintless
ctoth
.
Th
load
support
moldings
are
polyester
glass
and
occasionally
hev
some
resin
rich
cracks
or
crazing
develop
,
These
do
not
indicat
defective
material
and
should
not
cause
concern
.
CIRCUIT
BREAKER
INSTALLATION
General
Prior
to
initial
Installation
of
the
circuit
breaker
fmo
The
switch
-
board
,
certain
preliminary
inspections
should
be
made
to
insure
proper
operation
.
Tho
Inspection
procedures
tor
this
are
given
in
this
section
.
The
drcuft
breaker
is
shipped
with
contacts
closed
,
closing
•
springs
discharged
and
opening
springs
charged
,
ff
the
circuit
breaker
ie
furnished
with
an
undervoltage
device
,
the
device
will
be
lockwired
to
allow
closing
of
the
breaker
tor
shipment
,
A
tag
will
identity
the
lock
wire
.
To
remove
the
wire
,
open
the
breaker
Courtesy of NationalSwitchgear.com

IB
6.2
.
7.7
-
3
C
Pag
*
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fea
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f
Waiter
Assembly
with
Lifting
Yoke
Installed
Ffg
.
2
-
Circuit
Breaker
R
&
ar
\
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/
(
See
Detail
3
A
)
Detail
$
A
-
Cfrarg
/
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#
0
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/
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*
/
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Operated
Circuit
Breakers
Fig
,
3
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Circuit
Bteaaer
Pvner
£
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Courtesy of NationalSwitchgear.com

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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
Courtesy of NationalSwitchgear.com

Page
$
ASlJJlBPOWWBOVERr
Where
unusual
service
conditions
exist
,
covered
by
ANSI
Standard
C
37.04
,
it
must
be
presumed
that
these
conditions
were
considered
at
the
time
of
order
and
that
the
equipment
supplied
was
designed
for
the
special
application
and
that
an
appropriate
supplemental
maintenance
program
has
Peon
developed
.
These
maintenance
instructions
only
cover
circuit
brewers
u
$
o
<
j
under
the
standard service
conditions
.
kwise
until
racking
mechanism
automatically
stops
at
‘
TEST
'
Litton
.
The
circuit breaker
can now
b
*
positioned
tor
withdrawal
,
if
in
th
*
upper
compartment
the
lift
device
must
first
be
located
in
the
correct
position
.
For
withdrawal
iromthe
switchboard
,
again
push
the
racking
unlocking
lever
to
the
left
and
turn
the
racking
crank
counterclockwise
only
until resistance
to
motion is
felt
.
{
Approxi
-
mately
2
-
3
turns
DO
NOT
FORCE
)
.
The
closing
springs
,
if
charged
,
will
automatically
discharge
when
the
circuit
breaker
Is
moved
to
the
withdrawn
position
.
The
circuit
breaker
can
now
be
removed
from
the
compartment
.
At
the
selected maintenance
period
,
th
*
felbwing
tests
and
adjustments
should be made
:
NOTE
;
The
following
tabulated
tests
and
adjustments
are
all that
are
normally
necessary
for
proper
maintenance
and
operation
of
the
5
VWK
Model
20
sari
0
$
circuit
breaker
.
The
remaining
portions
of
the
breaker
*
-
dose coil
assembly
,
sl
'
junt
trip
device
,
control
relay
,
auxiliary
switch and
motor
-
require
no
maintenance
during
the
standard
life
of
the
circuit
breaker
regardless
of
the
operating
duty
.
j
i
D
,
C
.
Millivolt
Drop
TQHX
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
h
* *
minimum
operations
.
The
following
table
lists
the
millivolt
drop
and
resistance
values
for
th
a
circuit
breakers
covered
by
this
instruction book
,
from
terminal
to
terminal
,
exclusive
of
the
primary
disconnects
.
MAINTENANCE
ADJUSTMENTS
AND
TESTS
General
Information
The
5
VHK
Modal
20
aeries
circuit
breakers
are
designed
for
minimum
maintenance and
tested
to
Insure that
only
minimum
maintenance
will
be
required
-
The
few
ad
|
u
$
tments
that
are
noted
are
required
only
when
an
operational
check indicates
a
problem
,
Of
course
;
during
the
maintenance
checks
,
an
accessible
bolts
,
unite
and
screws
should
be
routinely
checked
to
Insure
that
they
are
tight
.
ft
k
recommended
that
th
©
drcurt
breaker
be
normally
inspected
•
the
first
200
a
operations
,
regardless
of
the
type
of
duty
ft
is
t
for
.
These
operations
can
be
either
no
-
load
mechanical
,
current
switching
,
bulk
capacitor
^
"
or
reactor
switching
opera
-
,
*
or
for
motor
starting
applications
.
Vacuum
interrupters
,
as
used
on
the
5
VHK
Mode
)
20
series circuit
breakers
,
have
an
inherently
long
contact
life
and
will
provide
trouble
-
free
service
under
varied
application
conditions
,
as
long
as
the
circuit breaker
is
applied
within
its
rating
.
The
wear
condition
of
the
individual
vacuum
interrupters
wilt
vary
,
depend
-
ing
on
circuit
conditions
and such
variables
as
single
phase
versus
three
-
phase interruption
,
X
/
R
ratb
(
asymmetry
)
and
relay
delay
times
,
Of
course
,
interrupting
high
short
-
circuit
current
will
cause
contact
erosion
to
occur
.
The
interrupters
for
the
5
VHK
Model
20
series
Circuit
Breakers
are
tested
up
to
2000
%
KSl
,
It
is
unlikely
that
a
circuit
breaker
will
be
subjected
to
this
much
duty
during
the
life
of
the
breaker
and
ft
h
not
expected
that
the
Interrupters
will
have
to
be
replaced
due
to
excessive erosion
of
contacts
.
There is
,
however
,
a
chock
for
contact
wipe
(
contact
pressure
)
which
is
also
a
maasuro
of
contact
erosion
.
This
check
is covered
under
’
'
Circuit
Breaker
Operation
and
Contacts
"
.
When
contact
wipe
is
lees
than the
minimum
specified
and
there
is
not
a
mechanical
problem
,
then
tha
interrupter
should
be
replaced
due
to
contact
erosion
.
&
iSa
^
Sii
1200
Ampere
\
z
a
2000
Ampere
8
30
*
Millivolt
drop
with
200
amperes
DC
flowing
.
Insulation
Cleaning
Any
dirt
,
dust
or
grease
should
be
removed
from
the
surfaces
of
the
entire
current
carrying
structure
and
vacuum
interrupter
4
.
Wiping
th
<
a
surface
with
a
clean
lint
f
rea
cloth
is
normally
sufficient
for
this
purpose
.
*
Rem
ember
to
discharge
mW
-
band
ring
on
Interrupters
so
©
quipped
.
If
.
however
after
the
first
inspection
period
there
|
$
no
indication
of
any
problems
,
actual
operating
experience
with
specif
fcscircuits
will
indicate
the
future
amount
of
maintenance
noodod
for
the
‘
Sue
airouit
breakers
and the
procedure
can
be
modified
as
-
ired
,
Courtesy of NationalSwitchgear.com

nJ
u
.
x
:
.
I
.
rov
Page
7
ni
»
i
»
ASfiA
OflOWN
eoveat
Circuit
Breaker
Operation
,
Contact
Adjustment
and
Timing
0
,
Close
the
breaker
,
measure
and
record
the
same
dimen
-
sion
,
Contact
Adjustment
1
.
To
check
breaker
operation
,
the
breaker
should
be
withdrawn
from
the
switchboard
,
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
Test
(
See
Fig
.
3
)
.
Charge
the
closing
springs
and
turn
the
motor
switch
(
1
)
off
,
C
(
a
$
e
the
breaker
,
gngege
manual
charge
handle
with
charging
lever
(
3
)
.
During
the
Initial
portion
of
the
upward
stroke
of
the
handle
check
to
see
which
direction
the
closing
spring
guides
move
,
If
(
he
spring
guides
start
to
move
out
then
the
breaker
did
fully
close
,
if
the
spring
guides
begin
to
move
In
and
with
additional
pumping
moves
in
until
the
.
meehanfsm
can
be
heard
to
-
snap
in
*
,
then
the
breaker
did
not
fully
dose
originally
.
Excess
contact
pressure
or
friction
can
gause
this
condition
and
if
it
cannot
be
relieved
then
the
factory
should
be
consulted
.
3
.
Contact
Wipe
(
contact
pressure
)
Check
(
See
Fig
,
5
)
.
The
contact
air
gap
and
contact
wipe
is
sot
at
the
factory
.
These
parrs
should
not
be
repositioned
in
the
field
unless
a
pg
$
hrod
Change
is
required
to
correct
contact
sequence
as
described
elsewhere
.
Contact
wipe
is
set
at
the
factory
at
.
093
minimum
.
Contact
erosion
and
wear
in
mechanical
parts
will
cause
a
reduction
in
contact
wipa
over
the
life
of
the
breaker
and
a
check
should
be
made
to
insure
that
tha
wipe
is
not
less
than
.
020
'
*
.
The
measure
*
ment
is
made
a
$
follows
for
the
three
poles
:
d
.
The
air
gap
is
the
difference
between
the
two
measure
-
merits
.
The
acceptable
limits
are
.
37
$
-
.
$
00
.
with
the
upper
limit
being
approached
as
contact
wipe
approaches
the
minimum
.
5
.
Contact
Sopuence
Check
(
See
Fig
.
5
)
.
All
three
poles
should
touch
within
Z
millisecond
at
normal
dosrng
speeds
.
An
oscillo
-
scope
,
oscillograph
or
other
timing
method
may
bo
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
ihe
test
equipment
and
proce
-
dure
are
correct
,
Also
consider
,
especially
when
testing
with
electronicequipment
.
-
that
,
002
second
*
vacuum
interrupter
contact
bounce
Is
permissible
during
normal
closing
and
this
bounce
can
influence
the
contact
touch
measurements
.
If
it
is
determined
that
the
contabt
sequence
is
not
within
the
2
milliseconds
,
then
adjustment
is
required
.
Usually
,
readjustment
of
one
pole
should
be
sufficient
so
that
all
three
poles
touch
wkbfn
2
milliseconds
.
The
air
gap
of
the
pole
to
be
changed
should
be
decreased
if
the
contacts
of
that
|
bole
are
touching
after
the
Other
two
poles
,
or
increased
if
the
contacts
are
touching
before
the
other
two
poles
.
The
air
gap
is
decreased
by
turning
pushrpd
(
2
)
clockwise
,
viewing
from
the
top
of
the
breaker
,
and
increased
by
turning
oonterdockwise
.
To
turn
tha
pushrod
(
2
)
first
remove
retainer
and
pin
(
T
)
,
a
.
Close
the
breaker
and
measure
between
the
spring
base
and
nut
(
point
A
)
,
using
gage
pin
,
1
/
4
turn
of
the
pushrod
(
2
)
will
change
the
air
gap
by
approx
..
019
.
After
rotating
the
push
rod
,
caref
ully
reposition
the
push
rod
to
align
the
pin
holes
.
Replace
the
pin
arid
retainer
.
During
the
readjust
-
ment
procedure
note
that
the
contact
wipe
end
air
gap
dimen
-
sions
,
specified
previously
,
musi
be
maintained
.
No
more
them
/
2
turn
total
of
the
pushrod
should
be
required
when
readjustingfor
contact
sequence
.
b
.
The
measurement
with
the
breaker
dosed
should
be
at
least
.
093
for
a
new
breaker
.
c
,
When
contact
wipe
less
than
the
.
020
and
it
has
been
determined
that
the
breaker
closes
fully
and
there
r
$
not
a
mechanical
problem
,
then
the
interrupter
should
be
re
-
placed
due
to
contact
erosion
.
After
completing
the
contact
sequence
procedure
,
recheck
the
contact
wipe
and
air
gaps
.
j
"
*
*
*
•
'
"
Return
the
racking
screw
to
lt
$
original
position
by
turning
li
count
*
rciockwi
&
e
approx
,
two
to
'
three
turns
until
it
stops
.
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
,
otc
,
to
monitor
the
time
from
energizing
to
contacts
touch
or
pan
.
.
f
4
.
Contact
Air
G
»
pOh
«
ck
(
See
Fig
.
5
)
.
The
contact
air
gap
is
$
,
et
at
the
factory
at
the
nominal
dimension
of
.
40
.
This
value
will
normally
increase
as
the
contacts
erode
.
A
chock
o
<
the
contact
air
gap
Checks
(
hat
the
breaker
dcos
open
fully
and
thai
the
gap
is
sufficient
(
o
withstand
the
applied
voltage
.
The
measurement
is
made
follows
for
the
three
pole
$
.
a
.
Open
the
breaker
and
discharge
the
closing
springs
.
b
.
Measure
and
record
the
dimension
between
the
top
sur
»
face
of
the
flex
connector
damp
and
the
lead
mounting
bracket
.
Courtesy of NationalSwitchgear.com

Page
a
ASEA
mCH
/
H
BOV
^
W
i
;
*
3
*
"
i
;
§
I
0
t
\
t
a
"
*
»
*
$
E
<
—
T
3
-
FLEX
CONNECTOR
CU
«
P
LEAD
MOUNTING
BRACKET
s
S
5
s
\
S
s
I
I
V
5
h
SESS
^
^
~
B
AIR
GAP
PUSH
ROD
OjO
©
CONTACT
WIPE
Fig
,
5
-
Contact
Prw
$
ure
Ftg
.
6
*
*
L
$
tch
Adjustment
1
ACR
1
WQ
LIJUJ
vinrv
RAteMA
A
|
k
,
t
*
<
<
j
Ftg
.
7
-
flacking
M
&
ciranfsm
Courtesy of NationalSwitchgear.com

IB
6
,
2.7
.
7
-
3
C
Pago
9
aii
A
$
DS
attOWH
aoveflf
'
A
potentiometer
with
mounting
support
,
used
in
conjunction
with
an
oscilloscope
or
oscillograph
,
and
Instructions
are
available
on
spedalorderWspecificalfycheekingopeningandcloslng
speeds
.
Racking
Mechanism
(
See
Fig
.
7
)
The
circuit
breaker
racking
mechanism
is
adjusted
lor
proper
operation
and
should
next
bo
disturbed
unless
ft
becomes
possible
to
dose
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
lower
Iron
i
mehan
ism
coverplate
and
with
the
circuit
breaker
closed
,
make
adjustments
by
regulating
the
length
of
connecting
rod
(
1
)
for
1
/
35
inch
minimum
to
3
/
32
inch
maximum
clearance
at
between
trip
link
(
3
)
and
blocking
lever
(
2
)
,
CONTROL
Device
The
circuit
breaker
dosing
and
opening
times
should
be
within
the
following
time
ranges
for
normal
operation
.
sums
MASV
.
25
-
35
40
-
60
NOTES
:
1
,
6
elowO
°
C
,
the
closing
times
will
increase
(
butwith
no
reduction
In
dosing
force
)
;
and
opening
times
will
be
within
the
limits
,
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
controldevice
is
required
,
the
close
latch
release
rod
(
5
)
overtravel
may
be
adjusted
as
described
below
.
Close
Latch
Rod
Release
Overtravel
2
.
Adjustments
to
correct
speeds
.
If
found
to
b
^
outside
limits
,
are
critical
and
the
nearest
District
Office
should
be
contacted
for
recommendations
.
Operating
Mechanism
The
various
mechanism
adjustments
described
in
the
following
sections
apply
to
all
circuit
breakers
covered
by
this
Instruction
Bulletin
,
1
,
Back
off
on
dose
latch
release
rod
(
5
)
and
check
that
the
circuit
breaker
witl
not
close
electronically
or
manually
pushing
up
on
close
release rod
(
$
)
to
the
full
extent
of
its
travel
.
2
.
Charge
the
dosing springs
.
Push
up
on
cteea
latch
release
rod
(
5
)
to
the
full
extent
of
its
travel
.
While
Holding
the
close
latch
release
rod
in
this
position
,
turn
up
on
close
latch
release
rod
(
$
)
until
the
circuit breaker
doses
.
Turn
close
latch
release
rod
(
5
)
up
an
additional
1
1
/
2
turns
.
-
Latch
Engagement
(
Bite
)
(
Refer
to
Fig
,
$
)
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
,
after
removal
of
the
top
cover
plate
,
.
'
•
* *
"
*
s
s
w
'
v
!
r
O
—
\
To
adjust
the latch
(
2
)
engagement
,
proceed
as
follows
:
1
.
Back
off
adjusting
screw
(
3
)
to
assure
exoesslve
latch
engage
-
ment
.
:
D
F
2
.
Close
the
circuit
breaker
.
3
.
Turn
adjusting
screw
(
3
)
down
slowly
until
the
latch
just
releases
*
tripping
the
circuit breaker
,
4
.
Back
off
the
adjusting
screw
(
3
)
2
Turns
,
i
.
Rouen
.
Close IAYCH
%
CHAPC
^
G
CAW
3
.
ACTUATOR
,
I
,
WIT
SWITCH
6
.
CCOSS
LA
*
rcw
*
&
£
A
$
C
ftoo
«
,
SRftlWC
.
CUDSQ
LAtCW
RElgASG
R
00
7
.
SECONDARY
Close
LATCH
*
.
PRIMARY
CIOS
*
LAttX
Fig
,
$
*
CQntrol
Device
Adjustment
}
.
5
Courtesy of NationalSwitchgear.com

AH
ID
Page
10
AS
£
A
BROWN
9
QV
3
R
!
1
,
The
internal
shield
of
a
vacuum
interrupter
can
acquire
an
electrical
charge
which
i
$
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
grounding
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
interrupter
to
emit
some
X
-
racHat
)
on
which
could
be
a
health
hazard
on
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
.
LUBRICATION
The
5
VWK
Modal
20
series
circuit
breakers
are
lubricated
during
factory
assembly
as
follows
:
1
,
The
primary
disconnect
contacts
have
been
lubricated
with
NO
-
OX
-
ID
special
grade
-
A
grease
manufactured
by
Sanchem
,
Inc
;
(
Afc
&
No
.
71
$
222
A
.
1
Pt
.
can
)
,
2
,
All
othar
mechanism
parts
,
bearings
,
pins
,
etc
.
,
have
been
lubricated
with
AnderoJ
757
manufactured
by
Nuodex
,
Inc
,
(
for
-
merly
Tenneoo
Chemical
.
Inc
)
.
(
ABB
No
,
712994
A
,
4
oz
.
tube
)
.
It
grease
should
becom
*
contaminated
or
unduly
oxidized
(
hardened
and
datkened
)
or
If
parts
are
replaced
,
any
relubrica
-
tion
should
be
done
with
the
lubricants
noted
.
Therefore
,
do
not
run
any
primaty
circuit
dielectric
withstand
teste
on
isolated
Interrupters
with
open
contacts
>
above
rated
voltage
unle
$$
test
personnel
are
adequately
shielded
or
they
am
no
lass
rhsn
six
feet
from
the
test
unit
.
NOTES
:
1
.
h
i
$
recommended
that
the
primary
disconnects
be
maintained
by
renewing
the
grease
.
The
mechanism
should
be
periodically
inspected
lor
lubrication
contamination
:
frequency
of
Inspection
i
$
dependant
on
operating
environment
.
2
.
Do
not
uae
light
oil
to
lubricate
any
mechanism
pares
.
In
-
ergency
situations
.
Ancterei
732
may
bo
used
as
a
temporary
leant
,
tn
these
cases
,
allow
time
for
the
solvents
to
evaporate
r
to
any
mechanical
operations
.
It
Is
mandatory
mat
the
akor
undergo
thorough
lubrication
with
Anderol
767
at
the
next
aintonance
Interval
.
Use
of
solvents
to
free
contaminated
lubricant
is
strictly
forbidden
without
Immediate
reluprloation
using
Andcrpl
7
S
?
.
Note
that
bearing
surfaces
must
be
repacked
and
this
will
require
disassembly
of
the
mechanism
.
Do
not
operate
circuit
breaker
without
completing
this
procedure
.
3
.
The
charging
motor
is
sealed
and
no
lubrication
is
required
.
it
is
noted
that
NO
hazardous
X
-
radiation
is
produced
with
closed
contacts
at
any
test
voltage
or
with
open
bontaas
at
rated
voltage
and
there
should
be
no
cause
for
concern
,
Further
,
if
the
breaker
i
$
tested
in
its
swrtchg
&
ar
campartmeht
,
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
new
breaker
end
are
to
be
applied
for
a
one
-
minute
period
,
111
lisgjiijajgiiiteigsi
T
9.0
KV
Primary
Circuit
*
Secondary
Circuit
(
Control
)
11
GOV
DIELECTRIC
TESTS
tt
is
recommended
that
dielectric
withstand
tests
be
made
prior
to
use
and
then
at
routine
maintenance
periods
to
verify
the
Integrity
of
vacuum
Interrupters
.
If
.
during
the
dielectric
withstand
test
,
the
required
tost
voltage
cannot
bo
sustained
across
the
open
con
-
tacts
of
the
vacuum
interrupter
,
the
Interrupter
is
faulty
and
must
be
replaced
.
Always
insure
that
the
contact
air
gap
i
$
correct
•
before
conducting
primary
clrcun
dielectric
tests
.
Once
in
service
,
the
primary
circuit
should
be
tested
at
75
%
of
this
rating
,
*
lf
it
i
$
desired
to
make
a
dielectric
test
q
>
n
the
secondary
control
wiring
,
turn
the
spring
charging
motor
disconnect
switch
(
lf
Fig
.
3
)
to
the
'
OFF
*
position
.
Apply
tost
voltage
(
i
IQQV
^
AC
)
for
one
minute
to
eeqh
of
the
secondary
disconnect
contacts
at
the
rear
of
the
circuit
breaker
.
If
it
Is
desired
io
make
a
dielectric
test
on
the
spring
charging
motor
,
turn
the
motor
disconnect
switch
(
tt
Fig
,
3
)
to
the
*
ON
"
position
.
Apply
test
voltage
(
540
V
-
AC
)
for
one
minute
to
the
motor
circuit
.
cAvnouh
CAwnOM
CAUTION
*
CAunowfc
*
00
ecu
re
for
0
!
electee
•
*
*
:
.
»
tvs
s
vacuum
nrenw
-
a
•
%
.
'
*
r
’
.
:
Courtesy of NationalSwitchgear.com