ABB 15VHK500 - Page 10

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