Siemens FSV Programming manual

SIEMENS
Instructions
Installation
Operation
Maintenance
SG
-
3248
-
01
Vacuum
Circuit
Breakers
Type
FSV
and
MSV
»
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Courtesy of NationalSwitchgear.com

Introduction
THIS
EQUIPMENT
CONTAINS HAZARDOUS
VOLTAGES
AND
MECHANICAL
PARTS
WHICH
MOVE
AT
HIGH
SPEED
AND
MAY
BE
CONTROLLED
REMOTELY
.
SEVERE
PERSONAL
IN
-
JURY
OR
PROPERTY
DAMAGE
CAN
RESULT
IF
SAFETY
IN
-
STRUCTIONS
ARE
NOT
FOLLOWED
.
ONLY
QUALIFIED
PERSONNEL
SHOULD
WORK ON OR AROUND
THIS
EQUIP
-
MENT AFTER
BECOMING
THOROUGHLY
FAMILIAR WITH
ALL
WARNINGS
,
SAFETY
NOTICES
,
AND
MAINTENANCE
PRO
-
CEDURES
CONTAINED
HEREIN
.
THE
SUCCESSFUL
AND
SAFE
OPERATION OF
THIS
EQUIPMENT
IS
DEPENDENT
UPON PROPER
HANDLING
,
INSTALLATION
,
OPERATION
AND
MAINTENANCE
.
h
A
CAUTION
Indicates minor
personal
injury
or
property
damage
can
result
if
proper
precautions
are
not
taken
.
DANGER
Power
circuit breakers
are
applied
at
high
voltages
and
have mechanical
parts
which
move
at
high
speeds
and
will
cause
death
,
personal
injury
,
and
property
damage
.
Qualified
Person
For
the
purpose
of
this
manual
and
on
product
labels
,
a
qual
-
ified
person
is
one
who
is
familiar
with
the installation
,
con
-
struction and
operation
of
the
equipment
,
and the hazards
involved
.
In
addition
,
he
has the
following
qualifications
:
(
a
)
Is
trained
and
authorized
to
energize
,
de
-
energize
,
clear
,
ground
,
and
tag
circuits and
equipment
in
accordance
with
established
safety
practices
.
(
b
)
Is
trained
in
the
proper
care
and
use
of
protective
equip
-
ment
such
as
rubber
gloves
,
hard
hat
,
safety
glasses
or
face
shields
,
flash
clothing
,
etc
.
,
in
accordance
with
es
-
tablished
safety
practices
.
To
avoid
injuries
due
to
electrical shock
,
burns
,
and
entanglement
in
moving
parts
,
this
equipment
must
be
installed
,
operated
,
and maintained
only
by
qualified
persons
thoroughly
familiar
with
the
equipment
,
in
-
struction
manual
and
drawings
.
Field
Service
Operation
Siemens
Energy
&
Automation
,
Inc
.
can
provide
competent
,
well
-
trained Field
Service
Representatives
to
provide
technical
guidance
and
advisory
assistance
for
the
installation
,
over
-
haul
,
repair
and
maintenance
of Siemens
Energy
&
Automa
-
tion
,
Inc
.
equipment
,
processes
and
systems
.
Contact
regional
service
centers
,
sales
offices
or
factory
for
details
.
Signal
Words
Distinctive
signal
words
(
DANGER
,
WARNING
,
CAUTION
)
are
used
in
this
instruction
book
and
on
product
labels
to
indicate
degrees
of
hazard
that
may
be encountered
by
the
user
.
These
signal
words
are
defined
below
.
h
A
DANGER
Indicates death
,
severe
personal
injury
or
substantial
property
damage
will
result
if
proper
precautions
are
not
taken
.
h
A
WARNING
Indicates death
,
severe
personal
injury
or
substantial
property
damage
can
result
if
proper
precautions
are
not
taken
.
Courtesy of NationalSwitchgear.com

Table
of
Contents
General
Introduction
Receiving
Storage
‘
As
Found
’
Tests
Installation
Checkout
Circuit
Breaker
Elevations
Technical
Data
Rating
Plate
Content
Rating
Summary
Service
Conditions
General Performance
Data
Interrupter
/
Operator
-
Description
Description
—
General
Interrupter
/
Operator
Subassembly
Construction
Breaker Pole
Current
-
Path
Assembly
Vacuum
interrupter
The
Arc
Quenching
Principle
Switching
Operation
Operating
Mechanism
Construction
Indirect
Releases
Motor
Operating
Mechanism
Auxiliary
Switches
Mode
of
Operation
Charging
Closing
Trip
Free
Operation
Opening
Rapid
Auto
-
Reclosing
Manual
Operation
Manually
Charging
the
Closing Spring
..
.
Manual
Closing
Manual
Opening
Elementary Diagram
Indirect
Releases
(
Dual
Trip
&
Undervoltage
)
Secondary
Release
Undervoltage
Release
Construction
and
Mode
of
Operation
Capacitor
Trip
Device
Interrupter
/
Operator
-
Maintenance
General
Inspection
Check
List
Hand Tools Recommended
General
Metric
English
Minimum
Maintenance
Schedule
Lubrication
Overhaul
Lubrication
of
the
Operating
Mechanism
Vacuum
Interrupters
Contact
Erosion
Interrupter
Vacuum
Check
-
Mechanical
High
Potential
Testing
and
Electrical
Interrupter
Vacuum
Check
Vacuum
Tube
Replacement
Hydraulic
Shock
Absorber
Vehicle
-
Description
Vehicle
Function
and
Operational
Interlocks
Alignment
Interlocks
Breaker
Racking
Interlock
(
Lever
Type
)
Breaker
Racking
Interlock
(
Screw
Type
)
Plunger
Position Mechanical
Interlock
Automatic
Closing
Spring
Release
Continuous
Current
Interlock
Control
Cable
and
Connection
Box
Insulating
Barrier
-
Type
FSV
Front
Hinged
Panel
-
Type
FSV
Cubicle Interface
Barrier
for
Type
MSV
&
FSV Circuit
Breakers
Vehicle
-
Maintenance
Vehicle
Lubrication
Warranty
Warranty
20
20
1
22
1
3
3
23
3
23
5
23
23
23
8
23
9
24
10
24
10
24
24
11
25
11
25
11
26
12
12
26
..
.
12
.
.
.
12
27
31
14
14
32
15
32
15
32
15
32
15
33
15
34
15
34
16
38
16
38
17
39
17
39
17
17
40
19
19
19
41
19
20
42
Courtesy of NationalSwitchgear.com

Table
Of
Contents
Note
The
instructions
contained
within
this
manual
are
necessary
for
the
safe
installation
,
maintenance
and
operation
of
this
equip
-
ment
,
If
this
manual
is
misplaced
or
lost
,
replacement
manuals
are
available
through
the local
Siemens
Energy
&
Automation
,
Inc
,
sales
office
.
These
instructions do
not
purport
to
cover
all
details
or
variations
in
equipment
,
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
local
Siemens
Energy
&
Automation
,
Inc
.
sales
office
.
THE
CONTENTS OF
THIS
INSTRUCTIONAL
MANUAL
SHALL
NOT
BECOME
PART
OF
OR
MODIFY
ANY
PRIOR
OR
EXISTING
AGREEMENT
,
COMMITMENT OR
RELATIONSHIP
THE
SALES
CONTRACT
CONTAINS
THE ENTIRE
OBLIGATION
OF
SIEMENS
ENERGY
&
AUTOMATION
,
INC
.
THE WARRANTY
CONTAINED
IN
THE
CONTRACT
BETWEEN THE
PARTIES
IS
THE
SOLE
WARRANTY
OF
SIEMENS
ENERGY
&
AUTOMATION
,
INC
.
ANY
STATEMENTS
CONTAINED
HEREIN
DO
NOT
CREATE
NEW
WARRANTIES
OR
MODIFY
THE
EXISTING
WARRANTY
.
If
drawings
or
other
supplementary
instructions
for
specific
applications
are
forwarded
with
the
manual
or
separately
,
they
take
precedence
over
any
conflicting
or
incomplete
information
in
this
manual
Courtesy of NationalSwitchgear.com

Table
of
Illustrations
Circuit
Breaker
Handling
Instructions
MSV
Breaker
Front
and
Side
Elevation
View
FSV
Breaker
Front
and
Side
Elevation
View
Rating
Plate
5
kV
Vacuum
Breaker
15
kV
Vacuum
Breaker
Section
Through
A
Vacuum
Breaker
Pole
Section
Through
A
Vacuum
Interrupter
Section
Through
The
Vacuum
Breaker
Vacuum
Breaker
Mechanism
-
Closed
Position
and
Tripping
Springs
Charged
..
.
Operating
Mechanism
-
Details
of
Closing
Spring
Charging
Components
Operating
Mechanism
*
Open
Position
Tripping
Spring
Charged
and
Latched
.
.
.
View
of
Mechanism
-
Breaker
Shaft
in
Open
Position
Front
View
of
Mechanism
Enclosure
Arranged
for
Manual
Operation
Operator
Sequential
Operation
Diagram
Typical
Elementary
Diagram
Construction
of
Shunt
Release
Latch
Detail
Shunt
Release
-
Shown
Charged
Latch
Detail
Undervoltage
Release
-
Shown
Charged
Undervoltage
Blocking
Feature
!
Capacitor
Trip
Device
Lubrication
of
Operator
Typical
Primary
Interrupter
Contact
Life
Curves
Contact
Erosion
Check
Lower
Pole
Support
with
Insulated
Coupler
Primary
Contact
Closed
-
Free
Position
Primary
Contact
Forced
Open
by
Manual
Pressure
Vacuum
Tube
Replacement
Illustration
Illustration
Showing
Required
Technique
for
Fastening
Terminal
Clamp
Hardware
Details
of
the
Breaker
Racking
Interlock
-
Type
FSV
Details
of
the
Breaker
Racking
Interlock
-
Type
MSV
Details
of
the
Breaker
Racking
Interlock
-
Internal
to
Mechanism
Enclosure
Details
of
the
Automatic
Closing
Spring
Dischrge
System
-
Type
MSV
Details
of
the
Automatic
Closing
Spring
Discharge
System
-
Type
FSV
1200
,
2000
and
3000
Amp
Continuous
Current
Interlock
Orientation
Control
Cable
Connection
Detail
Insulating
.
Barrier
-
Type
FSV
FSV
Hinged
Front
Panel
Cubicle
Barriers
for
Type
MSV
Circuit
Breaker
Figure
I
.
Figure
2
.
a
.
Figure
b
.
Figure
3
.
Figure
4
.
Figure
5
.
Figure
6
.
Figure
7
.
Figure
8
.
Figure
9
.
Figure
10
.
Figure
11
.
Figure
12
.
Figure
13
.
Figure
14
.
Figure
15
.
Figure
16
.
Figure
16
.
a
.
Figure
b
.
Figure
c
.
Figure
17
.
Figure
18
.
Figure
19
.
Figure
20
.
Figure
21
.
a
.
Figure
b
.
Figure
c
.
Figure
22
.
Figure
23
.
Figure
24
.
a
-
1
.
Figure
a
-
2
.
Figure
b
.
Figure
25
.
a
.
Figure
b
.
Figure
26
.
Figure
27
.
Figure
28
.
Figure
29
.
Figure
30
.
2
6
.
7
9
11
.
12
13
13
13
.
14
15
16
.
17
17
18
19
20
20
21
21
.
..
21
.
.
.
25
26
26
27
28
28
29
30
33
33
.
35
36
37
37
38
39
.
..
39
40
Courtesy of NationalSwitchgear.com

General
Page
1
Introduction
Receiving
:
Circuit
breakers
are
normally
shipped
from
the
factory
com
-
pletely
assembled
,
inspected
,
tested
and
packed
.
Immedi
-
ately
upon
receipt
of
a
breaker
check
each
item
with
the
shipping
manifest
and
make
an
examination
for
evidence
of
any
dam
-
age
that
may
have
occurred
during
shipment
,
removing
pack
-
aging
carefully
with
correct
tools
where
necessary
.
If
any
shortage
,
damage
or
indication
of
rough
handling
is
found
,
immediately
call
it
to
the
attention
of
the
local
freight
agent
handling
the
shipment
.
Proper
notation
should
be
made
by
him
on
the
freight
bill
.
This
prevents
any
controversy
when
claim
is
made
and
facilitates
adjustment
.
Also
,
immediately
file
a
damage
claim
with
the
transportation
company
and
notify
the
nearest
Siemens
sales
representative
.
The
MSV
and
FSV
series
of
vacuum
circuit
breakers
are
pre
-
cision
built
devices
designed
to
function
efficiently
under
nor
-
mal
operating
conditions
.
They
are
designed
and
manufactured
to
operate
within
the
ANSI
C
37
standards
for
“
Indoor
"
oiless
circuit
breakers
.
Performance
requirements
of
these
stan
-
dards
are
met
or
exceeded
by
these
designs
.
Specific
Standards
which
apply
include
:
IEEE
Standard
Rating
Structure
Preferred
Ratings
and
Related
Required
Capabilities
IEEE
Standard
Test
Procedures
IEEE
Standard
Application
Guide
The
successful
performance
and
application
of
these
vacuum
breakers
depends
as
much
on
proper
installation
and
main
-
tenance
as
it
does
on
good
design
and
careful
manufacture
.
The
instructions
included
in
this
book
are
necessary
for
safe
installation
,
maintenance
and
operation
and
are
provided
to
aid
you
in
obtaining
longer
and
economical
service
from
your
Siemens
circuit
breakers
.
For
proper
installation
and
opera
-
tion
—
resulting
in
better
service
and
lower
maintenance
costs
—
this
information
should
be
distributed
to
your
operators
and
engineers
.
By
carefully
following
these
instructions
,
difficulties
should
be
avoided
.
However
,
they
are
not
intended
to
cover
all
details
or
variations
that
may
be
encountered
in
connection
with
the
in
-
stallation
,
operation
and
maintenance
of
this
equipment
.
Should
additional
information
be
desired
,
including
replace
-
ment
instruction
books
,
contact
your
Siemens
representative
.
C
37.04
C
37.06
C
37.09
C
37.010
Note
Damage
claims
must
be
processed
within
the
time
period
specified
by
the
carrier
.
Siemens
cannot
be
held
responsi
-
ble
for
shipping
damage
,
either
external
or
internal
,
if
the
inspection
is
not
made
and
claim
forwarded
within
the
set
time
limit
.
Courtesy of NationalSwitchgear.com

General
Page
2
Circuit
breakers
are
normally
shipped
from
the
factory
com
-
pletely
assembled
.
Observe
weight
markings
on
the
carton
and
ensure
that
capable
handling
equipment
is
used
.
Remove
packaging
carefully
with
the
correct
tools
.
Check
each
item
with
the
shipping
manifest
.
If
any
shortage
or
damage
is
found
,
immediately
call
it
to
the
attention
of
the
local
freight
agent
handling
the
shipment
.
Proper
notation
should
be
made
by
him
on
the
freight
bill
.
This
prevents
any
contro
-
versy
when
claim
is
made
and
facilitates
adjustment
.
gasps
Kp
|
|
|
i
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i
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Hi
f
.
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1
4
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5
'
ll
Remove
ramp
pieces
nailed
to
the
back
of
the
pallet
.
If
J
,
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s
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;
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.
TBES
iisp
cl
yf
=
:
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vfm
JP
‘
When
moving
breaker
to
location
with
a
fork
lift
,
observe
weight
and
lifting
locations
on
the
carton
.
Carefully
remove
carton
and
plastic
cover
.
v
9
Slips
*
:
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#
wmm
a
*
§
i
m
"
•
-
*
<
Remove
hold
down
bolt
and
angle
located
in
the
front
and
back
of
the
breaker
.
iJli
1
I
:
iSK
K
3
f
-
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&
3
.
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i
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if
H
is
,
!
11
is
w
pi
cS
-
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m
x
3
if
s
||
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2
S
l
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4
w
:
:
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;
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;
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,
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s
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V
,
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!
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-
-
s
;
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:
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p
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A
^
N
\
::
i
|
'
sal
N
il
,
’
Ti
'
1
1
im
WM
When
moving
breaker
to
location
with
a
crane
,
observe
weight
and
sling
lifting
locations
on
the
carton
.
Use
a
spreader
to
prevent
frame
distortion
and
/
or
damage
to
the
barriers
.
Carefully
remove
carton
and
plastic
cover
.
Place
ramp
pieces
in
front
of
the
pallet
in
line
with
the
breaker
wheels
and
nail
to
pallet
as
shown
.
Slowly
roll
the
breaker
off
the
pallet
.
Figure
1
Circuit
Breaker
Handling
Instructions
Courtesy of NationalSwitchgear.com

General
Page
3
Storage
NOTE
:
The
circuit
breaker
should be installed
as soon as
possible
.
If
storage
is
necessary
,
‘
As
Found
'
tests
are
recommended
prior
to
and
after
storage
for
comparison
.
For
storage
,
the
circuit
breakers should be
kept
indoors
in
a
clean
dry
protected
location
where
they
will
not
be
exposed
to
such
items
as
dirt
,
construction dust
,
corrosive
atmospheres
,
mechanical
abuse
or
rapid
temperature
variation
.
Outdoor
storage
of
circuit
breakers
is
not
recommended
.
If
breakers
must
be stored
outdoors
,
they
must
be
completely
covered
and
protected
from
the
elements
.
A
heat
source
must
be
provided
to
prevent
condensation
and
subsequent
corro
-
sion
.
Covering
should
allow
for
ventilation
.
Often
500
watts
heat
per
breaker
is
used
.
It
is
recommended
that
periodic inspection
of
the breakers
be
made
during
storage
and
if
necessary
procedures
adjusted
to
keep
the breakers
in
proper
condition
.
Before
testing
the
procedures
and
safety
precautions
indi
-
cated
in
High
Potential
Testing
and
Interrupter
Vacuum
Check
on
page
25
must
be
reviewed
.
With
the breaker
open
,
check
each
phase
across
the
open
contacts
by connecting
from
the
upper
to
the lower
primary
disconnects
.
With
the
circuit breaker closed
,
check
phase
-
to
-
phase
and
each
phase
-
to
-
ground
b
.
A
dielectric
test
on
secondary
and
control circuits
should
be
made
at
1125
volts
AC
for
one
minute
.
c
.
If
desired
,
contact
resistance
tests
can
be made
using
a
Ductor
.
d
.
Make
a
permanent
record
of
all
tests
performed
.
Installation
Checkout
“
As Found
”
Tests
The
following
agenda
provides
a
convenient
check
list
of
ac
-
tivities
to
be
performed
while
preparing
the
circuit
breaker
for
use
,
and
prior
to
insertion into the
cubicle
.
When
the
equipment
is
received
,
perform
and
record
“
As Found
”
insulation
tests
using
megger
or
Doble
tests to
give
an
initial
value
for
future
comparative
indication
of
insulation
change
.
Contact
resistance
tests
can
also
be
made
using
a
ductor
.
This
is recommended
for
all
new
circuit breakers
especially
if
they
are
to
be
stored
for
extended
periods
,
as
they
may
absorb
moisture and
contaminants
.
This should
also
be
done
after
storage
and
prior
to
placing
breakers
into
service
.
Changes
in
values
between
subsequent
tests
should be
eval
-
uated and
corrective
action taken
where
needed
.
Since
wide
variations
can
occur
in
insulation values
and
con
-
tact
resistance
because
of
atmospheric
conditions
,
contami
-
nation and
type
of
test
equipment
,
discrete
values
cannot
be
given
.
However
,
making
and
recording
these
tests
on
new
equipment
,
and
again
at
regular
intervals
,
will
give
a
compar
-
ative
indication
of
insulation
and
/
or
contact
resistance
change
.
Maintaining
a
permanent
record
of
these
values
for
each
cir
-
cuit breaker
should
be
part
of
the
Maintenance
Program
.
a
.
Insulation
resistance
tests
should
be
made
to
verify
the
insulation
integrity
.
These
can
include
megger
or
Dobel
tests
.
If
possible
,
a
high
-
potential
test
should
be made
for
one
minute
at
:
h
DANGER
Hazardous
voltages
and
high
speed
me
-
chanical
parts
will
cause
death
or
severe
personal
injury
and
property
damage
.
Read instruction
manual
,
observe
safety
in
-
structions
and
use
to
qualified
personnel
.
Prepare
circuit
breaker
for
insertion
into
its
cubicle
as
follows
:
Carefully
remove
packaging
.
Note
:
Vacuum
breakers
are
normally
supplied
with
their
primary
contacts
open
.
Press
“
TRIP
”
(
Red
)
,
“
close
”
(
black
)
and
again
"
TRIP
"
(
Red
)
push
buttons
to
confirm
this
is
true
.
See
Fig
.
2
a
&
2
b
Front
elevations
.
Carefully
note
and
check
rating
plate
to
ensure
maximum
voltage
,
continuous
current
,
interruption
rating
,
and
con
-
trol
voltages
are
compatible
with
the
system
and
the
cu
-
bicle
into which the
breaker
is
to
be inserted
.
Remove breaker
from
the
shipping
skid
following
require
-
ments
shown
pictorially
in
Figure
1
.
Remove
interphase
and external
barriers
.
Note
the
inter
-
phase
barriers
are
dissimilar
from
the
external
barriers
,
and
that this
dissimilarity
must
be
recognized
when
in
-
stalling
the
barriers
.
1
.
2
.
RATED
VOLTS
(
MAX
.
)
4.75
kV
8.25
kV
15.0
kV
TEST
VOLTAGE
3
.
A
.
C
.
D
.
C
.
4 .
14
,
000
20
,
000
27
,
000
38
,
000
27
,
000
38
,
000
Courtesy of NationalSwitchgear.com

General
Page
4
Perform
a
careful
visual
inspection
noting
any
damage
which
may
have
occurred
in
shipment
.
Clean
all
dust
,
dirt
and
foreign
materials
accumulated
in
shipment
.
Using
procedures
described
in
the
maintenance
section
of
this
manual
,
carry
out
a
vacuum
check
,
POO
.
Complete
a
manual
spring
charge
,
close
and
trip
operation
.
Reinstall
all
interphase
and
external
barriers
(
see
4
above
)
.
Check
primary
contact
assemblies
.
Fingers
should
be
fully
engaged
,
spring
loaded
and
arranged
with
sym
-
metry
about
the
axis
of
the
primary
stud
.
De
-
energize
cubicle
control
power
,
and
install
plug
jumper
between
cubicle
secondary
disconnects
and
those
of
the
breaker
.
Re
-
energize
control
power
springs
should
charge
.
With
the
local
control
switch
close
and
trip
breaker
.
(
Lever
type
racking
only
)
Note
that
with
the
breaker
closed
,
that
the
racking
release
handle
,
(
Fig
.
2
a
and
2
b
.
)
,
cannot
be
raised
.
Open
breaker
by
pressing
trip
button
and
note
the
racking
lever
may
be
freely
raised
.
(
Screw
type
racking
only
)
Refer
to
the
panel
mounted
cautionary
statement
and
safety
instructions
(
reproduc
-
tion
below
)
.
Read
and
understand
this
information
before
inserting
the
circuit
breaker
into
the
cubicle
.
5
.
A
SAFETY
INSTRUCTIONS
6
.
FOR
CIRCUIT
BREAKERS
WITH
SCREW
RACKING
7
.
THIS
CUBICLE
MAY
BE
EQUIPPED
WITH
KEY
TYPE
INTERLOCK
IF
SO
THE
LOCK
BOLT
MUST
BE
IN
THE
WITHDRAWN
POSITION
AND
THE
CIRCUIT
BREAKER
OPEN
BEFORE
ATTEMPTING
TO
CHANGE
POSITION
OF
BREAKER
1
2
BEFORE
INSERTING
BREAKER
THE
FOLLOWING
NORMAL
OPERATING
CONDITIONS
SHOUl
D
BE
VERIFIED
THE
DRIVE
NUT
IS
FULLY
RACKED
OUT
AGAINST
STOP
AND
BREAKER
IS
OPEN
PUSH
BREAK
ER
IN
T
O
CUBICLE
DISCONNECT
POSITION
WHERE
INTERLOCK
PLUNGER
WILL
STRIKE
A
POSITIVE
STOP
RAISE
RACKING
RELEASE
HANDLE
AND
PUSH
BREAKER
TO
TEST
POSITION
WHERE
IT
WILL
MAKE
A
POSITIVE
STOP
AND
WILL
BE
AUTOMATICALLY
COUPLED
TO
THE
DRIVE
MECHANISM
8
.
9
.
3
MOVING
THE
BREAKER
BETWEEN
THE
DISCONNECT
AND
TEST
POSITION
IS
ACCOMPLISHED
BY
FIRST
RAISING
THE
RACKING
RELEASE
HANDLE
AND
EITHER
PUSHING
BREAKER
FROM
DISCONNECT
TO
TEST
POSITION
OR
PULLING
BREAKER
FROM
THE
TEST
TO
DISCONNECT
POSITION
10
.
4
IT
IS
NOT
RECOMMENDED
THAT
THE
BREAKER
BE
SCREW
RACKED
FROM
DISCONNECT
TO
TEST
POSITION
(
ONLY
POSSIBLE
IF
THE
BREAKER
S
RACKING
RELEASE
HANDLE
IS
RAISED
)
IF
THIS
IS
DONE
BREAKER
WILL
NOT
AUTOMATICALLY
STOP
IN
TEST
POSITION
11
a
.
5
CLOCKWISE
CRANK
ROTATION
WILL
MOVE
BREAKER
FROM
TEST
TO
CONNECTED
POSITION
COUNTERCLOCKWISE
ROTATION
WILL
MOVE
BREAKER
FROM
CONNECTED
TO
TEST
POSITION
UPON
REACHING
EITHER
CONNECTED
OR
TEST
POSITION
.
BREAKER
WILL
AUTOMATICALLY
STOP
AND
LATCH
IN
PLACE
THE
BREAKER
MAY
BE
REMOVED
FROM
THE
CUBICLE
BY
RAISING
THE
RACKING
RELEASE
HANDLE
AND
PULLING
THE
BREAKER
FROM
THE
DISCONNECT
POSITION
UNTIL
IT
IS
FULLY
WITHDRAWN
FROM
THE
CUBICLE
6
11
b
.
7
THE
KEY
INTERLOCK
IF
SPECIFIED
IS
USED
TO
LOCK
THE
BREAKER
•
TRIP
FREE
’
'
TO
LOCK
THE
BREAKER
TRIP
FREE
PROCEED
AS
FOLLOWS
WITH
BREAKER
IN
CONNECTED
POSITION
AND
LOCK
BOLT
WITHDRAWN
TURN
DRIVE
MECHANISM
CRANK
EXACTLY
FOUR
(
4
)
TURNS
IN
A
COUNTERCLOCKWISE
DIRECTION
TURN
KEY
ON
LOCK
TO
EXTEND
LOCK
BOLT
BREAKER
IS
NOW
LOCKED
IN
A
TRIP
-
FREE
CONDITION
A
CAUTION
TO
RELEASE
INTERLOCK
AND
RETURN
BREAKER
TO
NORMAL
CONDITION
TURN
KEY
TO
WITHDRAW
LOCK
BOLT
THEN
TURN
CRANK
IN
A
CLOCKWISE
DIRECTION
UNTIL
IT
STOPS
0
18
-
810
-
099
-
001
Perform
and
record
results
of
the
“
as
found
”
tests
.
Com
-
pare
with
pre
-
storage
“
As
Found
”
test
values
if
stored
.
De
-
energize
control
power
and
remove
plug
jumper
.
Coat
movable
primary
and
secondary
disconnects
with
a
light
film
of
Siemens
contact
lubricant
,
15
-
171
-
370
-
002
.
12
.
CIRCUIT
BREAKER
IS
EQUIPPED
WITH
SCREW
RACKING
AND
MAY
INCLUDE
A
KEY
TYPE
INTERLOCK
,
AS
WELL
.
KNOW
HOW
THIS
EQUIPMENT
IS
TO
BE
OPERATED
BEFORE
ATTEMPTING
TO
INSERT
OR
RACK
CIRCUIT
BREAKER
.
FAILURE
TO
DO
SO
COULD
RESULT
IN
PERSONAL
INJURY
AND
PROPERTY
DAMAGE
.
13
.
14
.
A
DANGER
OBSERVE
SAFETY
INSTRUCTIONS
AND
RESTRICT
OPERATION
TO
QUALIFIED
PERSONNEL
ONLY
.
18
-
744
-
191
-
001
HAZARDOUS
VOLTAGES
ASSOCIATED
WITH
THE
APPLICATION
OF
THIS
BREAKER
WILL
CAUSE
DEATH
,
PERSONAL
INJURY
,
AND
PROPERTY
DAMAGE
.
Before
proceeding
with
the
initial
circuit
breaker
insertion
and
racking
to
the
bus
,
be
certain
the
bus
is
de
-
energized
.
Courtesy of NationalSwitchgear.com

General
Page
5
Move
breaker
to
fully
connected
position
on
a
de
-
ener
-
gized
bus
.
Close
and
trip
breaker
from
main
control
position
.
If
a
lock
-
out
key
interlock
has
been
provided
,
place
this
interlock
in
the
breaker
"
locked
out
”
position
,
key
re
-
moved
,
and
perform
a
close
operation
.
Check
that
the
breaker
has
gone
trip
free
.
Open
the
interlock
,
"
key
held
"
position
and
repeat
the
closing
trial
.
The
breaker
now
should
successfully
close
.
The
breaker
should
now
be
ready
for
service
.
On
FSV
circuit
breakers
examine
aramid
cords
to
ensure
they
are
aligned
over
each
of
the
guides
(
refer
to
page
37
,
Fig
.
29
for
location
)
.
Insert
breaker
into
its
cubicle
and
rack
to
the
"
discon
-
nect
”
position
.
Reenergize
control
power
.
Advance
the
breaker
to
the
“
test
"
position
and
close
breaker
electrically
.
Try
an
opening
operation
.
Observe
that
the
breaker
closes
and
opens
.
During
this
racking
exercise
note
the
alignment
of
the
stationary
and
movable
secondary
disconnects
.
Check
also
the
alignment
between
the
auxiliary
switch
bayonet
on
cubicle
wall
and
operating
yoke
on
breaker
.
See
Fig
.
2
a
and
2
b
or
reference
to
the
breaker
operating
yoke
.
19
.
15
.
16
.
20
.
17
.
18
.
21
.
Circuit
Breaker
Elevations
Typical
front
elevations
and
side
elevations
of
the
type
MSV
and
FSV
Vacuum
Circuit
Breakers
are
shown
in
figures
2
a
and
2
b
.
The
5
-
MSV
-
250
A
circuit
breaker
has
a
front
panel
design
about
4
%
"
higher
than
as
shown
for
use
with
type
‘
DG
’
ground
and
test
devices
.
The
cubicle
barrier
is
about
4
%
"
shorter
for
this
design
.
The
cubicle
and
breaker
are
not
interchangeable
without
changing
panels
.
A
WARNING
A
fully
connected
breaker
controls
high
volt
-
age
and
currents
.
Improper
use
can
cause
death
,
personal
injury
or
property
damage
.
Perform
initial
racking
to
connect
position
on
de
-
energized
bus
.
If
an
energized
bus
is
un
-
avoidable
obtain
appropriate
clearances
before
beginning
the
next
two
steps
.
Courtesy of NationalSwitchgear.com

General
Page
6
Primary
Contacts
HI
'
n
'
•
11
Close
i
Control
.
Cable
\
Terminal
Block
0
Trip
O
l
O
l
i
Racking
Release
Handle
O
I
I
^
-
=
4
V
I
7
^
7
\
vv
/
J
J
\
Breaker
Side
Elevation
I
Closing Spring
Discharge
Roller
)
I
h
TIT
rr
‘
n
A
II
I
r t
'
I
I
I
Operating
Yoke
I
I
I
nl
Barrier
/
t
I
Shutter
Guide
!
r
>
/
i
/
/
i
i
i
/
t
i
/
i
^
^
y
i
i
Secondary
Disconnect
/
i
_
J
v
-
NT
X
Grounding
Contacts
Guide
Bar
Breaker
Front
Elevation
MSV
Cubicle
Side
View
Figure
2
a
MSV
Breaker
Front
and
Side
Elevation
Courtesy of NationalSwitchgear.com

General
Page
7
Primary
Studs
i
V
*
.
r
-
rrt
-
-
4
-
'
l
/
,
?
,
"
1
"
^
-
U
-
I
f
-
HfP
1
»
,
1
'
I
r
*
1
I
I
I
i
\
l
v
-
v
,
-
>
*
1
i
1
1
JO
"
"
rr
-
^
T
'
^
l
^
:
y
0 1
\
j
1
I
1
—
1
it
Control
Cable
t
_
_
v
»
1
1
f
'
1
1
\
1
1
\
O
I
I
/
/
Terminal
Block
/
'
5
"
1
.
*
i
-
L
Vi
-
f
-
I
\
I
+
-
I
*
v
Z
v
y
Side
Elevation
Closing
Spring
Discharge
Roller
Closing
Spring
Charged
Indicator
Open
-
Close
Indicator
Operation
Counter
Close
Trip
Operating
Yoke
I
(
r
Handle
c
=
th
1
1
1
Shutter
Guide
>
111
1
i
-
L
Secondary
Disconnect
Grounding
Contacts
A
O
Guide
Bar
Front
Elevation
Figure
2
b
FSV
Breaker
Front
and
Side
Elevation
Courtesy of NationalSwitchgear.com

Technical Data
Page
8
Rating
Plate
Content
Rating
Plate
Content
Type
Designated
circuit breaker model
number
and
broadly
identifies
application
in
terms
of
maximum
voltage
and
interruption
capability
.
Rated
continuous
current
is the
designated
limit
of
current
in
RMS
amperes
at
rated
frequency
which
the
breaker
may
be
expected
to
carry
without
exceeding
temperature
limitations
.
The
highest
RMS
voltage
above
nominal
system
voltage
for
which
the
circuit
breaker
is
designed
,
and is
the
upper
limit
for
operation
.
The
ratio
of
rated
maximum
voltage
to
the
lower
limit
of
the
range
of
operating
voltage
in
which the
required
symmetrical
and
asymmetrical interrupting
capabilities
vary
in
inverse
proportion
to
operating
voltage
.
The
rated
full
wave
impulse
withstand
voltage
.
The
crest
value
of
a
standard
1.2
x
50
impulse
voltage
wave
which
a
new
circuit
breaker
must
be
capable
of
withstanding
without
flashover
or
puncture
during
design
tests
.
The
symmetrical
component
of
short
-
circuit
current
in
RMS
amperes
which
the
breaker
may
be
expected
to
interrupt
.
The
maximum
making
current
into
which
the
circuit
breaker
may
be
expected
to
close
and
latch
.
The
maximum
permissible
interval
between
energizing
the
trip
circuit
at
rated control
voltage
and
the
interruption
of
the
main
circuit
in
all
poles
.
Rated
frequency
is
the
sinusoidal
periodicity
at
which
the
circuit
breaker is
designed
to
operate
.
An
elementary
diagram providing
detailed
information
regarding
electrical
function
and
wiring
within
the
circuit
breaker
.
Motor
(
Spring
Charging
)
Range
of
control
voltages
required
to
serve
the
motor
which
stores
energy
in
the
closing
springs
.
Effective
value
of
current
required
at
nominal control
voltage
when
applied
to
the
serve
the
motor
which
stores
energy
in
the
closing
springs
.
Required
range
of
control
voltage
applied
to
the
spring
release
coil
which
will
ensure
successful
release
of
the
closing
springs
.
The
effective
value
of
current
required
at
nominal
control
voltage
when
applied
to
the
spring
release coil
.
Required
range
of
control
voltage
applied
to
the
shunt
trip
coil
which
will
ensure
a
successful
tripping
operation
.
Effective
value
of
current
required
at
nominal
control
voltage
when
applied
to
the
shunt
trip
coil
solenoid
.
Reference
to
the
instruction
manual
applicable
to
the circuit
breaker
by
publication
number
.
Weight
in
pounds
of
the
complete
circuit
breaker
assembly
.
Specifically
identifies
an
individual
breaker
and
affords
traceability
to
test
records
and
manufacturing
dates
.
The
month and
year
within
which
the
circuit breaker
was
manufactured
.
Hz
Wiring
Diagram
Amps
Volt
Range
Amps
Nominal
Rated
Max
Volts
kV
Close
( Spring
Release
Coil
)
Voltage
Range
Factor
(
K
)
Volt
Range
AMP
Nominal
Bil
kV
Trip
(
Shunt
Trip
Coil
)
Volt
Range
Amps
Nominal
Rated
Short Circuit
kA
Manual
Close
&
Latch
kA
LBS
Serial
No
.
Inter
Time
Cyc
.
Date
Mfg
.
Courtesy of NationalSwitchgear.com

Technical Data
Page
9
Rating
Summary
SIEMENS
Raleigh
,
NC
A
.
C
.
High
Voltage
Circuit
Breaker
1
.
Breaker
Type
2
.
Rated Maximum
Voltage
,
kV
3
.
Continuous Current
.
AMP
4
.
Power
System
Frequency
,
Hz
5
.
Rated
Short
Circuit
Interrupt
Current
,
kA
6
.
Voltage
Range
Factor
K
7
.
Interruption
Time
,
Cycles
60
Hz
8
.
Rated
Withstand
test
Voltage
,
Low
Frequence
,
kV
rms
9
.
Rated Withstand Test
Voltage
—
Impulse
kV
crest
10
.
Closing
of
Latching
Capability
,
kA
AMPS
TYPE
RATED
MAX
VOLTS
kV
RATED
SHORT
CIRCUIT
kA
VOLT
RANGE
FACTOR
K
_
CLOSE
&
LATCH
kA
BIL
kV
INTER
TIME
CYC
WIRING
DIAGRAM
Hz
VOLTS
RANGE
VOLTS
RANGE
VOLTS
RANGE
AMPS
NOMINAL
AMPS
NOMINAL
AMPS
NOMINAL
MOTOR
CLOSE
TRIP
MANUAL
LBS
.
DATE
MFG
.
SERIAL
NO
.
.
Made
in
USA
16
-
65
B
-
024
-
331
Figure
3
Rating
Plate
Vmax
I
Freq
Isc
K
Int
T
.
Withstand
-
kV
Cycles
Low
Freq
.
Impulse
C
&
L
Weights
,
Approx
.
kA
Pounds
Kilograms
Type
kV
kA
Hz
kA
Number
1
2
3
4
6
5
7
8
9
10
11
12
5
-
MSV
-
250
5
-
MSV
-
250
5
-
FSV
-
350
5
-
FSV
-
350
5
-
FSV
-
350
7
-
FSV
-
500
7
-
FSV
-
500
7
-
FSV
-
500
15
-
FSV
-
500
15
-
FSV
-
500
15
-
FSV
-
750
15
-
FSV
-
750
15
-
FSV
-
750
15
-
FSV
-
1000
15
-
FSV
-
1000
15
-
FSV
-
1000
4.76 1200
4.76
2000
29
60
1.24
5
19
60 58
600
272
60
29
1.24
5
19
60
58 625
283
4.76
1200
60
41
1.19
5
19
60
78
1200
544
4.76
2000
60
41
1.19
5
19
60
1200
78
544
4
,
76
3000
60
1.19
41
5
19
60
78
1200
544
8.25
1200
33
1.25
60
5
36
95
66
860
390
8.25
2000
60
33
1.25
5
36
95
66
860
390
8.25
3000
60
33
1.25
5
36
95
66
900 408
370
370
58
©
580
580
15.0
1200
60 18
1.30
5
36
95 860
390
2000
15.0
60
18
1.30
5
36
95
860
390
15.0
1200
60
28
1.30
5
36
95
860
390
2000
3000
15.0 60
28
1.30
5
36
95 860
390
15.0 60
28
1.30
5
36
95
15.0
1200
60
37
1.30
5
36
95
77
1200
544
15.0
2000
3000
60
37
1.30
5
36
95
1200
77
544
15.0
60
37
1.30
5
36
95
77
1200
544
©
58
kA
OPTIONAL
©
77
kA
OPTIONAL
Table
1
Rating
Summary
Courtesy of NationalSwitchgear.com

Technical Data
Page
10
Service
Conditions General Performance
Data
The
following
parameters
define
the usual service
conditions
under
which
the circuit
breakers
shall
be considered
suitable
for
operating
at
their standard
ratings
.
Conditions
of
use
be
-
yond
these limits
must
be
given
special
consideration
,
con
-
sultation
with
the
factory
or
reference
to
the
IEEE
Application
Guide
,
ANSI C
37.0
I
0
.
Maximum
Ambient
Temperature
Operating
Times
-
Typical
Values
Characteristic
Cycles
(
60
Hz
)
MS
Closing
Time
Opening
Time
Arcing
Time
at
60
Hz
Interrupting
Time
75
4.5
33
2.0
15
0.9
40
C
(
104
F
)
50
5
-
30
C
(
-
22
F
)
Minimum Ambient
Temperature
General Performance
Data
1000
meters
(
3300
Feet
)
Unusual
service conditions
which
expose
the
equipment
to
dust
,
steam
,
salt
spray
,
corrosive
gases
,
dripping
water
,
vibra
-
tion
,
shocks
,
high
and
low
temperatures
,
high
altitudes
and the
like
may
require
special
construction
.
Refer
concerns
to
the
factory
.
The
values
of
insulation level
compiled
above
are
referred
to
sea
level
in
accordance
with
ANSI C
37.04
-
1979
consolidated
standards
.
The
higher
the site
altitude
,
the
lower
the
insulating
capacity
of
the air
.
The
decrease
in
insulating
capacity
is
ne
-
glected by
standards
for
altitudes
of
up
to
3
,
300
ft
.
(
1000
m
)
above
sea
level
.
For
higher
altitudes
,
the
values
of
low
-
fre
-
quency
withstand
voltage
,
impulse
withstand
voltage
and
rated
continuous
current
must
be
corrected
in
accordance
with
ta
-
ble
2
.
Altitude
Typical
Closing
and
Tripping
Solenoid
Characteristics
Trip
Coil
Ohms
Amps
Control
Voltages
ANSI
C
37.06
Tbl
.
10
Ohms
Close
Coil
Amps
48
VDC
125
VDC
250
VDC
120
VAC
60
Hz
240
VAC
60
23
2.1 2.4
20.0
121
1.0
23
5.4
487
0
,
5
121
2.1
121
0.9
23
4.7
487
0.4
1.8
121
General
Performance
Data
Typical
Spring
Charging
Motor
Characteristics
Charge
Time
Seconds
Control
Voltages
ANSI
C
37.06
Tbl
.
10
Current
Amps
Table
2
Altitude
Correction
Factors
,
k
48
VDC
125
VDC
250
VDC
120
VAC
60
Hz
240
VAC
60
Hz
8
10
10
4
2
10
Altitude
Rated
Maximum
Voltage
and
Insulation Level
6
10
Rated
Continuous
Current
3
10
(
m
)
ft
.
General
Performance
Data
(
1000
)
(
1500
)
(
3000
)
3300
1.00
1.00
5000
0.95
0.99
Auxiliary
Switch
Ratings
10000
.
0.80
0.96
Characteristic
Rating
NOTE
:
interpolated
correction
factors
shall
be
used
in
determining
factors for
intermediate
altitudes
.
Maximum
Operating
Voltage
Continuous
Current
,
Max
.
Making
Current
,
Max
.
Breaking
Capacity
Resistive
Load
DC
or
AC
Inductive
Load
at
220
VDC
(
L
/
R
=
20
ms
)
500
V
10
A
30
A
1200
VA
750
VA
Courtesy of NationalSwitchgear.com

Interrupter
/
Operator
Description
Page
11
stored
energy
operating
mechanism
housing
.
This sub
-
as
-
sembly
is
shown
in
figures
4
-
5
.
Construction
(
Refer
to
Figures
4
-
8
)
Each
of
the
circuit
breaker
poles
are
fixed
to
the
rear
of
the
operating
mechanism
housing
(
60
)
by
two
cast
-
resin
insula
-
tors
(
16
)
.
The
insulators
also
connect to
the
upper
(
20
and lower
(
40
)
poles
supports
which
in
turn
support
the
ends
of
the
vac
-
uum
interrupter
(
30
)
.
Where
required
by
dielectric
require
-
ments
,
assemblies
are
fitted
with
phase
barriers
(
80
)
.
The
pole
supports
are
aluminum
castings
on
all
circuit
breaker
ratings
,
except
for
3000
A
continuous
current
where
copper
castings
are
used
and
on
the
15
-
FSV
-
500
,
1200
A
where
sheet
steel
supports
are
used
.
The
support
pole
terminals
,
(
27
)
and
(
24
)
each
receive
primary
stud
extensions
.
The
energy
-
storing
mechanism
and all the
control
and
actuat
-
ing
devices
are
installed
in
the
mechanism
housing
(
60
)
.
The
mechanism
is
of
the
spring
charged
stored
energy
type
and
is
mechanically
and
electrically
trip
free
.
The
type
MSV
and
FSV
vacuum
circuit breakers
are
of
drawout
construction
,
and
conform
to
the
requirements
of ANSI C
37.20
for
breakers
to
be
applied
in
metal clad
switchgear
.
The
vac
-
uum
circuit
breakers consist
of
a
combination
of
two
sub
-
as
-
semblies
.
The
“
interrupter
/
operator
”
sub
-
assembly
is
a
unitized
assembly
of
the
three
vacuum
interrupters
,
primary
insulators
,
and
operating
mechanism
.
The
second
sub
-
assembly
,
the
“
vehicle
”
is
the
supporting
draw
-
out structure
sub
-
assembly
into
which
is
fitted
the
first
sub
-
assembly
.
The
drawout
struc
-
ture
sub
-
assembly
provides
primary
stud
extensions
,
closed
breaker
racking
interlocks
,
closing
spring
discharge
feature
,
and other
requirements
needed
to
ensure
safe
and
reliable
use
during
racking
and
fully
connected
operations
.
These
two
sub
-
assemblies
will
be
separately
described
.
Interrupter
/
Operator
Sub
-
Assembly
The
interrupter
/
operator
sub
-
assembly
consists
of
the
three
poles
,
each
with
its
vacuum
interrupters
and
primary
insula
-
tors
,
mounted
on
the
common
motor
or
hand
charged
spring
Figure
4
5
KV
Vacuum
Breaker
Courtesy of NationalSwitchgear.com

I
nterrupter
/
Operator
Description
Page
12
Figure
5
15
KV
Vacuum
Breaker
The close
-
open
indicator
(
55
)
,
closing spring charge
indicator
(
58
)
,
and the
operation
counter
(
59
)
are
fitted
on
the
front of
the mechanism
housing
(
60
)
.
The control
connector
(
68.7
)
for
the
control
and
signalling
ca
-
bles
is
a
64
contact
plug
or
24
point
terminal block
applied
internally
to
the drawout unit
.
Breaker
Pole
(
Figure
6
)
The
vacuum
interrupter
(
30
)
is
rigidly
connected
to
the
upper
terminal
angle
(
27.1
)
and
pole
support
(
20
)
by
its
terminal
post
(
31.2
)
.
The
lower
part
of
the
interrupter
is stabilized
against
lateral
forces
by
a
centering ring
(
28.1
)
on
the
pole
support
(
40
)
.
The external
forces
due
to
switching
operations
and the
contact
pressure
are
absorbed
by
the
struts
(
28
)
.
Current
-
Path
Assembly
(
Figure
6
)
The
current
-
path
assembly
consists
of
the
upper
terminal
an
-
gle
,
27.1
.
and
pole
support
.
20
,
the
stationary
contact
,
31
,
and
the
moving
contact
,
36
,
which
is
connected
with
the lower
ter
-
minal
,
29
,
by
terminal
clamp
,
29.2
,
and
a
flexible
shunt
.
29.1
.
Vacuum
Interrupter
(
Figure
7
)
The
moving
contacts
’
,
(
26
)
,
motion is
aligned
and
stabilized
by
guide
busing
,
(
35
)
.
The metal bellows
,
(
34
)
,
follows
the travel
of
contact
,
(
36
)
,
and seals
the
interrupter
against
the surround
-
ing
atmosphere
.
The Arc
-
Quenching
Principle
When
the
contacts
separate
,
the
current
to
be
interrupted
ini
-
tiates
an
ionized metal
vapor
arc
discharge
and
flows
through
this
plasma
until the
next current
zero
.
The
arc
is then
extin
-
guished
and the conductive
metal
vapor
condenses
on
the
metal
surfaces
of
the
arcing
chamber
,
(
33
)
,
(
Fig
.
7
)
within
a
matter
of
microseconds
.
As
a
result
,
the dielectric
strength
in
the
increasing
contact
gap
builds
up
very
rapidly
.
Below
a
limit
of
about
10
,
000
amperes
,
the
arc
is distributed
across
the
contacts
and
the
arc
is
easily
interrupted
.
At
cur
-
rents
larger
than about
10
,
000
amperes
the
arcs
own
electro
-
magnetic
forces
cause
the
arc
to
contract to
essentially
a
point
arc
.
If
the contracted
arc
is allowed
to
remain
stationary
,
it
ov
-
erheats
the
contacts
at
the
arc
roots to
the
point
where
the
molten metal
vapor
does
not
allow the
dielectric
to
rebuild dur
-
ing
the
current
zero
and
large
magnitude
currents
could
not
be
interrupted
.
Courtesy of NationalSwitchgear.com

Interrupter
/
Operator
Description
Page
13
Figure
6
Section
Through
A
Vacuum
Breaker
Pole
34
Bellows
35
Guide
36
Moving
contact
36.1
Movable
contact
stem
36.2
Mechanical
coupling
.
31
Stationary
contact
31.1
Washer
31
2
Stationary
Contact
Stem
32
Insulator
33
Arcing
chamber
31.2
is
^
31.1
l
i
ILJi
i
J
+
J
31
33.5
—
33
VSTOOsi
36
-
r
t
alfett
34
—
^
«
35
i
W
U
36.1
H
IlllE
36.2
Typical
for
other
ratings
Typical
for
5
-
MSV
-
250
b
.
a
Figure
7
Section
Through
A
Vacuum
Interrupter
Figure
8
Section
Through
the
Vacuum
Breakers
Courtesy of NationalSwitchgear.com

Interrupter
/
Operator
Description
Page
14
The
contacts
are
designed
so
that
a
self
-
generated
field
causes
the
arc
to
travel around the
contacts
.
This
prevents
local
ov
-
erheating
while
interrupting
large magnitudes
of
short circuit
current
.
The ionized
metal
vapor
arc
discharge
can
only
be maintained
if
a
certain minimum
current
flows
.
A
current
that
does
not
maintain
this level
may
be
extinguished abruptly
prior
to
cur
-
rent
zero
.
This
chopping
current must
be
kept
to
a
minimum
in
order
to
prevent
unduly high
overvoltages
building
up
when
inductive circuits
are
switched
.
The
use
of
a
special
contact
material
ensures
that
current
chopping
is
limited
to
4
-
5
Amp
.
The
rapid
build
-
up
of
the dielectric
strength
in
the
break
ena
-
bles the
arc
to
be
safely
extinguished
even
if
contact
separa
-
tion
occurs
immediately
prior
to
current
zero
.
The
arc
drawn
in
the
vacuum
breaker is
not
cooled
.
The
metal
vapor
plasma
is
highly
conductive
and
the
resulting
arc
volt
-
age
only
attains values between
20
-
200
V
.
For
this
reason
and
because
of
the short
arcing
times
,
the
arc
energy
developed
in
the break
is
very
small
.
This also
accounts
for
the
long
elec
-
trical
life
expectancy
of
the
vacuum
interrupter
.
Owing
to
the
high
vacuum
(
less than
109
bar
)
in
the
interrupter
,
contact
clearances
in
the
range
of
6
to
20
mm
(
0.25
to
0.80
inches
)
are
adequate
to
attain
a
high
dielectric
strength
.
Switching
Operation
(
Figure
6
)
When
a
closing
command
is initiated
the
closing
spring
,
which
was
previously
charged
by
hand
or
by
the
motor
,
actuates
the
moving
contact
,
(
36
)
,
through
breaker
shaft
,
(
63
)
,
lever
,
(
63.7
)
,
insulated
coupler
,
(
48
)
,
and lever
,
(
48.6
)
.
The
forces
that
occur
when the action
of
the insulated
coupler
is
converted
into the vertical
action
of
the
moving
contact
are
absorbed
by
guide
link
,
(
48.9
)
,
which
pivots
on
support
,
(
40
)
,
and
eye
bolt
,
(
36.3
)
.
During closing
,
the
tripping spring
and
the
contact
pressure
springs
,
(
49
)
,
are
charged
and
latched
by
pawl
,
(
64.2
)
.
The
closing
spring
of
motor
-
operated
breaker
is
recharged
im
-
mediately
after
closing
.
In
the closed
state
,
the
necessary
contact
pressure
is main
-
tained
by
the
contact
pressure
spring
and
the
atmospheric
pressure
.
The
contact
pressure
spring automatically
compen
-
sates
for
arc
erosion
,
which is
very
small
.
When
a
tripping
command is
given
,
the
energy
stored
in
the
tripping
and
contact
pressure
springs
is released
by
pawl
,
(
64.2
)
.
The
opening
sequence
is similar
to
the
closing
se
-
quence
.
The
residual
force of
the
tripping spring
arrests
the
moving
contact
,
(
36
)
in
the
open
position
.
Operating
Mechanism
The
operating
mechanism is
comprised
of
the
mechanical
and
electrical
components
required
to
:
Charge
the
closing
springs
with
sufficient
potential
en
-
ergy
to
close
the breaker
and
to store
opening
energy
in
the
tripping
and
contact
pressure
springs
.
Mechanisms
to
release
closing
and
tripping
actions
.
Means
of
transmitting
force
and motion
to
each
of
three
pole
positions
.
Operate
all
these
functions
automatically
thru
electrical
charging
motor
,
cutout
switches
,
antipumping
relay
,
re
-
lease
solenoids
,
and
auxiliary
switches
.
Signal
thru
indicators
the
breaker
status
,
(
open
,
closed
)
and
spring
condition
(
charged
or
discharged
)
and
num
-
ber
of
operations
.
Figure
9
Vacuum
Breaker
Mechanism
CLosed
Position
,
Tripping
Springs
Charged
and
Closing
Springs
Discharged
Courtesy of NationalSwitchgear.com

Interrupter
/
Operator
Description
Page
15
Figure
10
Operating
Mechanism
,
Details
of
Closing
Spring
Charging
Components
Construction
The essential
parts
of
the operating
mechanism
are
shown
in
Fig
.
9
.
Its actuation
is
described under
“
Operator
Sequential
Operation
Diagram
”
on
page
17
.
Indirect Releases
(
Tripping
Coils
)
The
shunt releases
convert
the electrical
tripping
pulse
into
mechanical
energy
,
it
'
s
function
being
td
release the
tripping
spring
.
The
undervoltage
release
may
be
manually
actuated
by
a
make
or a
break
contact
.
In
the
make
contact
case
,
its
coil is shorted
out
,
built
-
in
series
resistors
limiting
the
current
.
Motor
Operating
Mechanism
The
spring charging
motor
(
50.9
)
is bolted
to
the
charging
mechanism
(
50.2
)
gear
box installed
in
the mechanism hous
-
ing
.
Neither
the
charging
mechanism
nor
the
motor
require
any
serving
.
Auxiliary
Switch
The
auxiliary
switch
is
actuated
by
the
breaker
shaft
.
When
the stored
-
energy
mechanism
has
been
charge
^
,
the
instant
of
operation
can
be chosen
as
desired
.
The mechanical
energy
for
carrying
out
an
"
open
-
close
-
open
"
sequence
for
auto
-
reclosing
duty
is stored
in
the
closing
and
tripping
springs
.
Charging
The details
of
the
closing spring charging
mechanism
are
shown
in
figures
9
,
10
,
11
and
12
.
The
charging
shaft
,
(
62.1
)
,
is
sup
-
ported
in
the
charging
mechanism
,
(
50.2
)
,
but
is
not
coupled
mechanically
with
the
charging
mechanism
.
Fitted
to
it
are
the
crank
,
(
62.2
)
,
at
one
end and the
cam
,
(
62.3
)
,
together
with
lever
,
(
62.5
)
,
at
the other
.
When the
charging
mechanism is
actuated
by
hand
with
a
hand crank
opening
or
by
a
motor
,
the
flange
,
(
50.4
)
,
the
flange
.
50.3
,
turns
until the driver
,
(
50.3
.
1
)
,
locates
in
the
cutaway
part
of
cam
disc
,
(
62.3
)
,
thus
causing
the
charging
shaft
to
follow
.
The
crank
,
(
62.2
)
,
charges
the
closing
spring
(
62
)
.
When
this
has been
fully
charged
the crank
actuates
the
linkage
,
(
55.1
)
,
via control lever
,
(
55.2
)
,
for
the
"
closing spring
charged
"
indi
-
cator
,
(
55
)
,
and
actuates
the
limit
switches
,
(
50.4
.
1
)
,
for
inter
-
rupting
the
motor
supply
.
At
the
same
time
,
the lever
(
62.5
)
at
the other end
of
the
charging
shaft
is
securely
locked
by
the
latching
pawl
(
62.5
.
2
)
.
When the
closing
spring
is
being
charged
,
cam
disc
,
(
62.3
)
,
follows
idly
,
i
.
e
.
it
is
brought
into
position
for
closing
.
Mode
of
Operation
The
operating
mechanism is
of
the stored
-
energy
trip
free
type
,
i
.
e
.
the
charging
of
the
spring
is
not
automatically
followed
by
the
contacts
changing
position
,
and the
closing
function
may
be
overridden
by
a
trip
command
at
any
time
.
Courtesy of NationalSwitchgear.com